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Gayathrie B, Krishnan M, Srinivasan S, Raza FB, Muthukumar B. Comparison of microtensile bond strength of prepared teeth treated with proanthocyanidin, Camellia sinensis - Polyphenols, and metal crowns luted with resin-modified glass ionomer cement: An in vitro study. J Indian Prosthodont Soc 2024; 24:279-283. [PMID: 38946512 DOI: 10.4103/jips.jips_127_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 06/13/2024] [Indexed: 07/02/2024] Open
Abstract
AIM The aim of this study was to evaluate the effect of proanthocyanidin and C. sinensis-polyphenols on microtensile bonding properties of prepared teeth with resin-modified glass ionomer cement (GIC). SETTING AND DESIGN This was an in vitro study. MATERIALS AND METHODS Seventy-eight maxillary premolars were selected and mounted into auto-polymerizing acrylic resin blocks. The samples were prepared and metal crowns were fabricated. The samples were randomly divided into three groups. Samples under Group 1 were not treated with any of the extracts and followed conventional bonding protocol. Samples under Group 2 and Group 3 were treated with proanthocyanidin and C. sinensis-polyphenols, respectively. After dentin treatment, these samples were luted to metal crowns using resin-modified GIC. Universal testing machine was used to measure the load at which the crowns were debonded and microtensile bond strength in MPa was calculated. STATISTICAL ANALYSIS The results were statistically analyzed using one-way ANOVA and post hoc Tukey HSD. RESULTS Samples treated with C. sinensis polyphenols (Group 3) had maximum bond strength followed by Group 2, where the samples were treated with proanthocyanidin. CONCLUSION C. sinensis polyphenols due to their anti-proteolytic and antioxidant properties showed improved bond strength compared to proanthocyanidin, a cross-linking agent, followed by conventional bonding protocol.
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Affiliation(s)
- B Gayathrie
- Department of Prosthodontics, SRM Dental College and Hospital, Chennai, India
| | - Murugesan Krishnan
- Department of Prosthodontics, Priyadarshini Dental College and Hospital, Pandur, India
| | | | - Fathima Banu Raza
- Department of Prosthodontics, Sri Ramachandra Institute of Higher Education and Research (SRIHER), Chennai, India
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Śmielak B, Armata O, Bociong K. Clinical longevity and trend analysis of 801 ultrathin ceramic veneers: A clinical cohort study. J Prosthet Dent 2024; 131:1084-1092. [PMID: 35636985 DOI: 10.1016/j.prosdent.2022.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 04/03/2022] [Accepted: 04/04/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Whether ultrathin ceramic veneers are a suitable treatment alternative to conventional ceramic veneers is unclear. PURPOSE The purpose of this prospective clinical cohort study was to evaluate the efficacy and longevity of nonpreparation and minimally invasive ceramic veneers and the influence of existing restorations and ceramic type and to define the relationship between the number of veneers placed on different teeth and in different locations, as well as age and sex correlations. MATERIAL AND METHODS A total of 801 veneers were placed on incisors, canines, and premolars on maxillary and mandibular teeth between January 2011 and August 2019 (ABR number: RNN/92/19/KE). Feldspathic or feldspathic and lithium disilicate veneers were made, etched, silanated, and cemented. The restorations were evaluated 2 weeks after placement and then every 6 months by using the modified United States Public Health Service (USPHS) criteria. The relationship between participant age and number of veneers was analyzed by using the Spearman rank coefficient test and the Mann-Whitney U test. Changes in the number of participants and veneers in subsequent years were analyzed based on the Spearman rank correlation coefficient. The trend between the location of veneers and the sex of the participants was analyzed by using the chi-squared test for trend. Longevity tables and a survival curve for the veneers were prepared based on the Kaplan-Meier method. The relationships between veneer longevity and the type of ceramic used and the presence of restorations were compared by using the Taron-Ware test (α=.05). RESULTS The mean longevity of the intact veneers was 8.45 years. Clinical success was 99.7% after 1 year and 97.9% after 4 years; this value remained constant until the end of the study. Most participants were women (n=122; 84.1%), and the mean age was 41 years; median 40 years. The number of veneers placed on mandibular teeth each year increased over the subsequent years. CONCLUSIONS The longevity of ultrathin veneers after 9 years of observation was not related to the ceramic used or to the presence of a composite resin restoration. Veneers were more commonly placed in middle-aged women and in mandibular anterior teeth.
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Affiliation(s)
- Beata Śmielak
- Assistant Professor, Department of Prosthodontics, Medical University of Lodz, Lodz, Poland.
| | - Oskar Armata
- Assistant Professor, Department of Conservative Dentistry and Endodontics, Medical University of Lodz, Lodz, Poland
| | - Kinga Bociong
- Assistant Professor, Department of General Dentistry, Medical University of Lodz, Lodz, Poland
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Comba A, Baldi A, Pucci R, Rolando C, Alovisi M, Pasqualini D, Scotti N. Effects of Etching Time and Ethanol Wet Bonding on Bond Strength and Metalloproteinase Activity in Radicular Dentin. J Clin Med 2024; 13:2474. [PMID: 38731002 PMCID: PMC11084777 DOI: 10.3390/jcm13092474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/13/2024] [Accepted: 03/22/2024] [Indexed: 05/13/2024] Open
Abstract
(1) Background: The objective of this in vitro study was to evaluate the impact of different etching times and ethanol pre-treatments on the immediate bond strength of a hydrophilic multi-mode universal adhesive (Clearfil Universal Bond Quick, Kuraray, UBQ) and on the consequent gelatinolytic activity of metalloproteinases (MMPs) on radicular dentin. (2) Methods: Sixty single-root teeth were selected and divided into four groups according to the adhesive protocol applied for fiber post cementation: (G1) 15 s H3PO4 application + UBQ; (G2) 30 s H3PO4 application + UBQ; (G3) 15 s H3PO4 application + ethanol pre-treatment + UBQ; (G4) 30 s H3PO4 + ethanol pre-treatment + UBQ. After adhesive procedures, fiber posts were luted into the post space with a dual-curing cement (DC Core, Kuraray) and light-cured for 40 s. To perform the push-out test and nanoleakage analyses for both coronal end apical areas, 1 mm slices were prepared, following a 24 h storage period in artificial saliva. Additionally, an in situ zymographic assay was conducted to explore endogenous MMP activity within the radicular layer. Results were statistically analyzed with ANOVA and Tukey post hoc tests. Statistical significance was set at p < 0.05. (3) Result: ANOVA revealed a statistically significant difference in push-out bond strength related to the pre-treatment variable but did not highlight any significance of etching time. Specimens pre-treated with ethanol wet bond application showed higher bond strength (p < 0.01). In situ zymography quantification analyses revealed that all tested groups, independently of etching time end ethanol pre-treatment, activated MMP gelatinolytic activity. A significant increase in MMP activity was detected for the 30 s etching time. However, ETOH pre-treatment significantly reduced MMP activity within the adhesive interface (p < 0.01). (4) Conclusions: The tested adhesive showed similar results regardless of the etching time protocol. The gelatinolytic activity of MMPs was observed in all the groups. Further investigations and extended follow-ups are required to validate the results of the present study in vivo.
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Affiliation(s)
| | | | | | | | | | | | - Nicola Scotti
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10100 Turin, Italy; (A.C.); (A.B.); (R.P.); (C.R.); (M.A.); (D.P.)
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Alqutaibi AY, Saker S, Alghauli MA, Algabri RS, AbdElaziz M. Clinical survival and complication rate of ceramic veneers bonded to different substrates: A systematic review and meta-analysis. J Prosthet Dent 2024:S0022-3913(24)00215-4. [PMID: 38604905 DOI: 10.1016/j.prosdent.2024.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/12/2024] [Accepted: 03/14/2024] [Indexed: 04/13/2024]
Abstract
STATEMENT OF PROBLEM Evidence on the long-term clinical assessment and longevity of ceramic veneers bonded to different substrates is limited. PURPOSE The purpose of this systematic review and meta-analysis was to evaluate the effect of various substrates, including enamel, dentin, or an existing composite resin restoration, on the clinical survival and complication rates of ceramic veneers. MATERIAL AND METHODS The PubMed, Scopus, and the Cochrane Library electronic databases were searched, and related journals were hand searched without time or language restrictions to identify clinical trials that compared the survival rate and clinical complication rates when bonding ceramic veneers to different tooth substrates. The success rate of the included participants was estimated by the number of veneers that did not require a clinical intervention, and the survival rate by all veneers that did not fail absolutely. The risk difference (RD) with 95% confidence intervals (CIs) for dichotomous outcomes was used to quantify the intervention effect. RESULTS Of 973 screened articles, 6 clinical studies were included. The survival and success rates varied depending on the bonding substrate. Enamel-bonded veneers had almost perfect rates of survival (99% with a range of 98% to 100%) and success (99% with a range of 98% to 100%). Veneers bonded to composite resin or surfaces with minimal dentin exposure had slightly lower survival rates (94% with a range of 91% to 97% and 95% with a range of 91% to 100%, respectively) and success rates (70% with a range of 60% to 80% and 95% with a range of 90% to 99%). Severe dentin exposure significantly decreased both survival rates (91% with a range of 84% to 98%) and success rates (74% with a range of 64% to 85%). The combined findings suggested that ceramic veneers bonded to enamel had fewer clinical complications (RD: -0.04; 95% CI: -0.09 to 0.02) and lower failure rates (RD: -0.13; 95% CI: -0.32 to 0.07) compared with those bonded to exposed dentin. Additionally, veneers attached to teeth with minimal dentin exposure were significantly less likely to require clinical interventions (RD: -0.16; 95% CI: -0.31 to -0.01) and had a reduced incidence of failure (RD: -0.08; 95% CI: -0.17 to 0.01) compared with those with severe dentin exposure. CONCLUSIONS Ceramic veneers bonded to enamel showed higher survival and success rates with lower clinical incidences of complications and failure than those bonded to dentin or teeth with existing composite resin restorations.
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Affiliation(s)
- Ahmed Yaseen Alqutaibi
- Associate Professor, Department of Prosthodontics and Implant Dentistry, College of Dentistry, Taibah University, Al Madinah, Saudi Arabia; and Associate Professor, Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen.
| | - Samah Saker
- Professor, Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Mohammed Ahmed Alghauli
- Assistant Professor, Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen
| | - Radhwan S Algabri
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Ibb University, Ibb, Yemen; and Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, National University, Ibb, Yemen
| | - Mohammed AbdElaziz
- Associate Professor, Substitutive Dental Science Department, College of Dentistry, Taibah University, Al Madinah Almonawrah, Saudi Arabia; and Professor, Crown and Bridge Department, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt
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Sahadi BO, Sebold M, André CB, Nima G, Dos Santos A, Chiari MDESDC, Nascimento FD, Tersariol ILDS, Giannini M. Effect of experimental dentin etchants on dentin bond strength, metalloproteinase inhibition, and antibiofilm activity. Dent Mater 2024; 40:e12-e23. [PMID: 38368137 DOI: 10.1016/j.dental.2024.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 02/12/2024] [Accepted: 02/12/2024] [Indexed: 02/19/2024]
Abstract
OBJECTIVE this study evaluated dentin microtensile bond strength (µTBS) and failure modes (at 24 h and one year), bonding interface regarding hybridization, surface morphology regarding demineralization, in situ metalloproteinase (MMP) activity, and antibacterial effect of three dentin etchants compared to 35% phosphoric acid (PA). MATERIALS AND METHODS The Adper Single Bond 2 adhesive (3 M Oral Care) was applied on moist dentin etched with PA (control) or on air-dried dentin etched with 3% aluminum nitrate + 2% oxalic acid (AN), 6.8% ferric oxalate + 10% citric acid (FO), or 10% citric acid (CA). The µTBS test used 40 human teeth (n = 10). Failure modes and surface morphology were analyzed by scanning electron microscopy (n = 3), while bonding interface morphology and MMP activity were evaluated by laser scanning confocal microscopy (n = 3). Antibacterial activity was evaluated against S. Mutans biofilm by means of viable cells count (CFU/mL). RESULTS PA presented the highest bond strengths regardless of aging time. PA, AN, and CA showed stable bond strengths after one year of storage. Adhesive and mixed failures were predominant in all groups. Thin hybrid layers with short resin tags were observed for the experimental etchants. The AN-based etchant was able to inhibit MMP activity. All tested etchants presented antibacterial activity against S. Mutans biofilm. SIGNIFICANCE This study suggests different dentin etchants capable of inhibiting MMP activity while also acting as cavity disinfectants.
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Affiliation(s)
- Beatriz Ometto Sahadi
- Department of Restorative Dentistry, Operative Dentistry Division, University of Campinas, Piracicaba Dental School, Avenida Limeira 901, Areião, 13414-903 Piracicaba, SP, Brazil.
| | - Maicon Sebold
- Department of Restorative Dentistry, Operative Dentistry Division, University of Campinas, Piracicaba Dental School, Avenida Limeira 901, Areião, 13414-903 Piracicaba, SP, Brazil.
| | - Carolina Bosso André
- Department of Restorative Dentistry, Operative Dentistry Division, Federal University of Minas Gerais, School of Dentistry, Avenida Presidente Antonio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil.
| | - Gabriel Nima
- Department of Biomedical Sciences, Ethics, Research and Education, Universidad de los Andes, School of Dentistry, Monseñor Álvaro del Portillo 12455, Las Condes 12455, Santiago, Chile.
| | - Andressa Dos Santos
- Applied Chemistry Graduate Program, Midwest State University UNICENTRO, Alameda Élio Antônio Dalla Vechhia 838, Vila Carli, 85040-167 Guarapuava, PR, Brazil.
| | | | - Fábio Dupart Nascimento
- Department of Molecular Biology, Federal University of São Paulo, São Paulo 04021-001, SP, Brazil.
| | | | - Marcelo Giannini
- Department of Restorative Dentistry, Operative Dentistry Division, University of Campinas, Piracicaba Dental School, Avenida Limeira 901, Areião, 13414-903 Piracicaba, SP, Brazil.
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Campos RP, Mailart MC, Matuda AGN, Yui KCK, Chagas GDS, Rocha MB, Tay FR, Pucci CR. Effect of Nisin-based pretreatment solution on dentin bond strength, antibacterial property, and MMP activity of the adhesive interface. J Mech Behav Biomed Mater 2024; 152:106407. [PMID: 38277911 DOI: 10.1016/j.jmbbm.2024.106407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/11/2024] [Accepted: 01/15/2024] [Indexed: 01/28/2024]
Abstract
OBJECTIVE To evaluate the effect of a Nisin-based dentin pretreatment solution on microtensile bond strength, antibacterial activity, and matrix metalloproteinase (MMP) activity of the adhesive interface. MATERIALS AND METHODS 100 human molars were sectioned to expose dentin. The teeth were assigned to five groups (n = 20), according to the dentin pretreatment: 0.5%, 1.0%, or 1.5% Nisin; 0.12% chlorhexidine (positive control), and no solution (negative control), and divided into 2 subgroups: no aging, and thermomechanical aging. Specimens were etched with 37% H3PO4 for 15 s and submitted to the dentin pretreatment. Then, they were bonded with an adhesive (Adper Single Bond 2) and a resin composite for microtensile bond strength (μTBS) evaluation. Antibacterial activity against Streptococcus mutans was qualitatively examined using an agar diffusion test. Anti-MMP activity within hybrid layers was examined using in-situ zymography. Data were analyzed with two-factor ANOVA and post-hoc Tukey's test (α = 0.050). RESULTS For μTBS, significant differences were identified for the factors "solutions" (p = 0.002), "aging" (p = 0.017), and interaction of the two factors (p = 0.002). In the absence of aging, higher μTBS was observed for the group 0.5% Nisin. In the presence of aging, all groups showed similar μTBS values. All Nisin concentrations were effective in inhibiting the growth of S. mutans. Endogenous MMP activity was more significantly inhibited using 0.5% and 1.0% Nisin (p < 0.050). CONCLUSION 0.5% and 1.0% Nisin solutions do not adversely affect resin-dentin bond strength and exhibit a potential bactericidal effect against S. mutans. Both concentrations effectively reduce endogenous gelatinolytic activity within the hybrid layer. CLINICAL RELEVANCE The use of 0.5% and 1.0% Nisin solutions for dentin pretreatment potentially contributes to preserving the adhesive interface, increasing the longevity of composite restorations.
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Affiliation(s)
- Raquel Pinto Campos
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
| | - Mariane Cintra Mailart
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil.
| | - Amanda Guedes Nogueira Matuda
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
| | - Karen Cristina Kazue Yui
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
| | - Gabriela da Silva Chagas
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
| | - Marcella Batista Rocha
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
| | - Franklin R Tay
- Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, USA
| | - Cesar Rogerio Pucci
- Department of Restorative Dentistry, Institute of Science and Technology, Sao Paulo State University, Sao José dos Campos, SP, Brazil
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Yao C, Liang S, Yu M, Wu H, Ahmed MH, Liu Y, Yu J, Zhao Y, Van der Bruggen B, Huang C, Van Meerbeek B. High-Performance Bioinspired Microspheres for Boosting Dental Adhesion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310251. [PMID: 38362704 DOI: 10.1002/smll.202310251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/13/2024] [Indexed: 02/17/2024]
Abstract
Dental adhesives are widely used in daily practice for minimally invasive restorative dentistry but suffer from bond degradation and biofilm attack. Bio-inspired by marine mussels having excellent surface-adhesion capability and high chemical affinity of polydopamine (PDA) to metal ions, herein, experimental zinc (Zn)-containing polydopamine-based adhesive formulation, further being referred to as "Zn-PDA@SiO2 "-incorporated adhesive is proposed as a novel dental adhesive. Different Zn contents (5 and 10 mm) of Zn-PDA@SiO2 are prepared. Considering the synergistic effect of Zn and PDA, Zn-PDA@SiO2 not only presents excellent antibacterial potential and notably inhibits enzymatic activity (soluble and matrix-bound proteases), but also exhibits superior biocompatibility and biosafety in vitro/vivo. The long-term bond stability is substantially improved by adding 5 wt% 5 mm Zn-PDA@SiO2 to the primer. The aged bond strength of the experimentally formulated dental adhesives applied in self-etch (SE) bonding mode is 1.9 times higher than that of the SE gold-standard adhesive. Molecular dynamics calculations indicate the stable formation of covalent bonds, Zn-assisted coordinative bonds, and hydrogen bonds between PDA and collagen. Overall, this bioinspired dental adhesive provides an avenue technology for innovative biomedical applications and has already revealed promising perspectives for dental restorative dentistry.
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Affiliation(s)
- Chenmin Yao
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
| | - Shengjie Liang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Miaoyang Yu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Hongling Wu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Mohammed H Ahmed
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
- Department of Dental Biomaterials, Faculty of Dentistry, Tanta University, Tanta, 31511, Egypt
| | - Yingheng Liu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Jian Yu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Yan Zhao
- Department of Chemical Engineering, KU Leuven (University of Leuven), Celestijnenlaan 200F, Leuven, B-3001, Belgium
| | - Bart Van der Bruggen
- Department of Chemical Engineering, KU Leuven (University of Leuven), Celestijnenlaan 200F, Leuven, B-3001, Belgium
| | - Cui Huang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Bart Van Meerbeek
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
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Wang Y, Zong Z, Ding N, Zhang Z. Polyvinylpyrrolidone as a primer for resin-dentin bonding. J Mech Behav Biomed Mater 2024; 150:106281. [PMID: 38048714 DOI: 10.1016/j.jmbbm.2023.106281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/23/2023] [Accepted: 11/26/2023] [Indexed: 12/06/2023]
Abstract
OBJECTIVE This study aimed to investigate the effects of polyvinylpyrrolidone (PVP)-containing primer (PCP) on dentin bonding. METHODS PVP and anhydrous ethanol were used to prepare the PCPs, which were prepared at concentrations of 0.5%, 1%, and 2% (w/v). These PCPs were subsequently applied to the dentin surface, denoted as E1, E2, and E3, respectively. In the control group, no primer was applied. Following the treatment, the dentin surfaces were subjected to analysis using Fourier-transform infrared spectroscopy (FTIR), and the micro-tensile bond strength (MTBS) was evaluated. The failure mode, nanoleakage, and bonding longitudinal section were observed utilizing scanning electron microscopy (SEM). Additionally, the effect of PCPs on matrix metalloproteinases (MMPs) activity was analyzed through an in situ zymography test. Data were subjected to statistical analysis using ANOVA tests (α = 0.05). RESULTS Significant alterations in the infrared resonances associated with collagen cross-linking within the collagen matrix were observed across all PCP groups. The application of PCP demonstrated a noteworthy enhancement in micro-tensile bond strength (MTBS) compared to group C (p < 0.05). Notably, group C exhibited the lowest MTBS (41 ± 7.7 MPa), whereas group E2 demonstrated the highest MTBS (66 ± 11.9 MPa). Even after undergoing aging, the MTBS of the PCP groups remained superior to that of group C (p < 0.05). The resin tag length in the PCP groups was found to be greater than that of group C, and the occurrence of nanoleakage was comparatively lower in the PCP groups, both before and after aging. Additionally, PCP exhibited a dose-dependent inhibition of matrix metalloproteinases (MMPs) activity, which was statistically significant (p < 0.05). CONCLUSIONS The utilization of PCP Primer exhibits notable enhancements in bond strength, mitigates nano-leakage, and suppresses enzyme activity within the hybrid layer.
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Affiliation(s)
- Yaoxin Wang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Zhenyu Zong
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Ning Ding
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Zutai Zhang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
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Schulz-Kornas E, Tittel M, Schneider H, Bemmann M, Pellino M, Meissner T, Fuchs F, Hannig C, Tetschke F, Park KJ, Strumpski M, Haak R. Tooth-composite bond failure with a universal and an etch-and-rinse adhesive depending on mode and frequency of application. Dent Mater 2024; 40:359-369. [PMID: 38143188 DOI: 10.1016/j.dental.2023.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 12/26/2023]
Abstract
OBJECTIVES To evaluate the effect of an additional layer of universal adhesive on the interfacial enamel/dentin-composite gap formation in relation to application mode and aging, via spectral domain optical coherence tomography (SD-OCT) and scanning electron microscopy (SEM). METHODS In vitro class V cavities in 114 caries-free premolars were restored by applying one or two layers of a universal adhesive (Scotchbond Universal, SBU) in self-etch (se) and etch-and-rinse (er) mode or the reference adhesive OptiBond FL (OFL-er). The restorations were imaged by SD-OCT (six groups, n = 8) and SEM (n = 3) directly after filling (t1), water storage (t2, 24 h), embedding (t3), and thermo-mechanical loading (t4, TCML). The interfacial gaps were quantified using 26 parameters and analyzed using principal component analysis and linear mixed effect models. RESULTS Gap formation at enamel and dentin was significantly influenced by the adhesive, the application mode and number of layers (p < 0.001). This was due to the influence of the SBU-er mode (p < 1e-05), which showed significantly more gap formation and a greater range of variation with double application when compared to SBU-se and OFL. The fewest interfacial gaps occurred with one or two applications of OFL-er and one layer of SBU-er. SIGNIFICANCE Adhesive application mode and the number of adhesive layers are relevant factors in the tooth-composite bond failure. Double application worsened the adaptation of SBU to freshly prepared dentin conditioned with phosphoric acid.
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Affiliation(s)
- Ellen Schulz-Kornas
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany.
| | - Mathilde Tittel
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Hartmut Schneider
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Maximilian Bemmann
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Marco Pellino
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Tobias Meissner
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Florian Fuchs
- Department of Prosthetic Dentistry and Dental Material Science, University of Leipzig, Leipzig, Germany
| | - Christian Hannig
- Policlinic of Operative Dentistry, Periodontology and Pediatric Dentistry, Faculty of Medicine Carl-Gustav-Carus, TU Dresden, Dresden, Germany
| | - Florian Tetschke
- Department of Clinical Sensoring and Monitoring, Faculty of Medicine Carl-Gustav-Carus, TU Dresden, Dresden, Germany
| | - Kyung-Jin Park
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Michaela Strumpski
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany
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Kaczor-Wiankowska K, Puszkarz AK, Palczewska-Komsa M, Lipa S, Krasowski M, Sokołowski J, Lewusz-Butkiewicz K, Ulacha K, Nowicka A. Internal Adaptation of Composite Fillings Made Using Universal Adhesives-A Micro-Computed Tomography Analysis. MATERIALS (BASEL, SWITZERLAND) 2024; 17:636. [PMID: 38591452 PMCID: PMC10856209 DOI: 10.3390/ma17030636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/20/2024] [Accepted: 01/26/2024] [Indexed: 04/10/2024]
Abstract
This study aimed to evaluate internal tooth-filling interfaces of composite fillings made using universal adhesives using micro-computed tomography (µCT). Sixty class V cavities were randomly assigned into six groups: Peak Universal etch and rinse (PER), Peak Universal self-etch (PSE), Adhese Universal etch and rinse (AER), and Adhese Universal self-etch (ASE). Two further adhesives considered gold standards were used as control groups: OptiBond FL (OER) for the etch and rinse technique and Clearfil SE for the self-etch technique (CSE). All teeth were subjected to thermomechanical loading and four-year water storage. Next, they were analyzed using µCT to investigate the internal tooth-filling interfaces. The proportions between the gap volume (GV) at the tooth-filling interface and the volume of applied composite filling (FV), between the gap and cavity volumes (CV), and between the gap volumes at the tooth-filling interface of the external (EGV) and internal (IGV) parts were calculated. Adhese Universal achieved the significantly lowest gap-to-filling- and gap-to-cavity-volume ratios for both types of etching techniques comparing to those of the Peak Universal and control groups. Significant differences between the gaps in external and internal parts of the tooth-filling interface were only noted in the control groups. Internal gap formation and development at the tooth-filling interface depend on the material as well as the type of its application.
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Affiliation(s)
- Kinga Kaczor-Wiankowska
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University in Szczecin, 72 Powstancow Wielkopolskich Str., 70-111 Szczecin, Poland
| | - Adam K. Puszkarz
- Division of Materials Science, Commodity Science and Textile Metrology, Textile Institute, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 116 Zeromskiego Str., 90-924 Lodz, Poland
| | - Mirona Palczewska-Komsa
- Department of Dental Prosthetics, Pomeranian Medical University in Szczecin, 72 Powstancow Wielkopolskich Str., 70-111 Szczecin, Poland
| | - Sebastian Lipa
- Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego Str., 90-924 Lodz, Poland
| | - Michał Krasowski
- Material Science Laboratory, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Jerzy Sokołowski
- Department of General Dentistry, Medical University of Lodz, Pomorska 251 Str., 92-213 Lodz, Poland
| | - Katarzyna Lewusz-Butkiewicz
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University in Szczecin, 72 Powstancow Wielkopolskich Str., 70-111 Szczecin, Poland
| | - Katarzyna Ulacha
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University in Szczecin, 72 Powstancow Wielkopolskich Str., 70-111 Szczecin, Poland
| | - Alicja Nowicka
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University in Szczecin, 72 Powstancow Wielkopolskich Str., 70-111 Szczecin, Poland
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11
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Yang Y, Inoue G, Hosaka K, Tichy A, Ikeda M, Tagami J, Shimada Y. The Effect of a Deproteinizing Pretreatment on the Bonding Performance and Acid Resistance of a Two-step Self-etch Adhesive on Eroded Dentin. Oper Dent 2024; 49:65-75. [PMID: 38019217 DOI: 10.2341/23-005-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVES This study evaluated how deproteinization using sodium hypochlorite (6% NaOCl) or hypochlorous acid (50 ppm HOCl) with or without the subsequent use of an arylsulfinate salt-containing agent (Clearfil DC Activator; DCA; Kuraray Noritake Dental) affects the micro-tensile bond strength (μTBS) and formation of an acid-base resistant zone (ABRZ) of a two-step self-etch adhesive on eroded dentin. METHODS Coronal dentin surfaces of sound human molars were exposed to 48 cycles of demineralization (1% citric acid; 5 minutes) and remineralization (buffer solution with pH=6.4; 3.5 hours). They were then assigned to experimental groups according to the pretreatment used: none (negative control), NaOCl, NaOCl+DCA, HOCl, and HOCl+DCA. Sound dentin surfaces with no pretreatment were used as a positive control. The dentin surfaces were bonded with Clearfil SE Bond 2 (Kuraray Noritake Dental), and μTBS was measured either after 24 hours or 20,000 thermal cycles (TC). The μTBS data were statistically analyzed using a mixed-model analysis of variance (ANOVA) and t-tests with Bonferroni correction. Failure mode was determined with scanning electron microscopy (SEM), which was also used for the observation of ABRZ. RESULTS Among experimental groups, there was no significant difference between the negative control, HOCl, and HOCl+DCA after 24 hours, but the HOCl-pretreated groups exhibited significantly higher μTBS than the negative control after TC (p<0.01). Pretreatment with NaOCl and NaOCl+DCA resulted in significantly higher μTBS (p<0.001), but the highest μTBS was measured on sound dentin (p<0.001). TC decreased μTBS significantly in all groups (p<0.001) except for sound dentin and NaOCl+DCA (p>0.05). Adhesive failures prevailed in eroded groups, whereas cohesive failures were predominant on sound dentin. ABRZ was recognized in all groups but marked morphological differences were observed. CONCLUSIONS The combined use of 6% NaOCl and the arylsulfinate salt-containing agent partially reversed the compromised bonding performance on eroded dentin, while the effect of 50 ppm HOCl was negligible.
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Affiliation(s)
- Y Yang
- Yi Yang, DDS, PhD student, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - G Inoue
- *Go Inoue, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - K Hosaka
- Keiichi Hosaka, DDS, PhD, Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - A Tichy
- Antonin Tichy, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - M Ikeda
- Masaomi Ikeda, DDS, PhD, Department of Oral Prosthetic Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - J Tagami
- Junji Tagami, DDS, PhD, Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Y Shimada
- Yasushi Shimada, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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12
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Barros APO, de Melo Alencar C, Zambon M, de Andrade MF, Fernández E, Kuga MC. Etch-and-rinse versus self-etch strategy of a universal adhesive in different application methods at the bonding interface of fiber post cementation. J ESTHET RESTOR DENT 2023; 35:1249-1256. [PMID: 37218614 DOI: 10.1111/jerd.13068] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To evaluate the effect of etch-and-rinse (ER) versus self-etch (SE) strategies of a universal adhesive applied with a manual brush (MB) or rotary brush (RB) on the bonding interface of fiber post cementation. METHODS Forty bovine incisor roots were prepared and divided into four groups according to the methods of application and strategy of universal adhesive use (MB-ER, RB-ER, MB-SE and RB-SE). After 6 months, specimens from different thirds of the post space were evaluated of push-out strength, analysis of adhesive failure patterns, and extent of tags. RESULTS The RB-ER and RB-SE groups showed the highest bond strength values in the cervical and middle thirds of the post space. Cohesive adhesive failure had the highest incidence in the different thirds of the post space in the ER strategy, regardless of the adhesive application method. The RB-ER group showed the highest tag extensions. CONCLUSIONS The protocols of universal adhesive application with RB provided the greater bond strength, but only the ER strategy favored the formation of a greater extension of tags at the adhesive interface. CLINICAL SIGNIFICANCE The application of universal adhesive with RB into the post space increases the strength of the post-cemented fiber bond.
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Affiliation(s)
| | - Cristiane de Melo Alencar
- Department of Restorative Dentistry, School of Dentistry, University Center of the State of Pará, Belém, Brazil
| | - Matheus Zambon
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Marcelo Ferrarezi de Andrade
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Eduardo Fernández
- Instituto de Ciencias Biomédicas, Universidad Autonoma de Chile, Santiago, Chile
| | - Milton Carlos Kuga
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
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13
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Anton Y Otero CI, Liaudet N, di Bella E, Abdelaziz M, Feilzer A, Krejci I, Marger L. Evaluating the use of self-conditioning adhesive combined with dual curing resin cement as an endodontic sealer: An in vitro study. Biomater Investig Dent 2023; 10:2282523. [PMID: 38979096 PMCID: PMC11229672 DOI: 10.1080/26415275.2023.2282523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 11/07/2023] [Indexed: 07/10/2024] Open
Abstract
Objectives To compare infiltration, sealing and microleakage in root dentin with a self-conditioning adhesive system combined with dual curing resin (resin-based cement) to a conventional epoxy-resin-based sealer using confocal microscopy imaging. Methods 26 roots were enlarged and disinfected. Dentin tubules of 24 teeth were labelled with a red fluorophore (Rhodamine B) (two samples served as controls). Root canal samples were sealed in group AH (n = 11) with a conventional sealer (AH Plus Root Canal Sealer, Dentsply DeTrey) and in group RC (n = 11) with a resin-based cement (Parabond combined with Paracore, Coltène). Roots were then sectioned horizontally and immersed in H2O2 to remove the Rhodamine B not fixed by the sealers. The empty dentin spaces were labeled with a green fluorophore (Fluorescein) enabling the evaluation of infiltration as well as microleakage by confocal microscopy. Two additional samples were fractured in vertical direction for observation under SEM. Results Group RC presented significantly more infiltration in the middle third than in the middle and apical thirds of group AH. Microleakage was significantly higher in group AH than in group RC. SEM images revealed more dentin plugs and a homogenous resin layer in group RC in contrast to group AH. Conclusion The resin-based cement revealed promising outcomes compared to a traditional epoxy resin based sealer.
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Affiliation(s)
- Clara Isabel Anton Y Otero
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Nicolas Liaudet
- Bioimaging Core Facility, University of Geneva, Geneva, Switzerland
| | - Enrico di Bella
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Marwa Abdelaziz
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Albert Feilzer
- Department of Dental Material Sciences, Academic Center for Dentistry Amsterdam (ACTA), Gustav Mahlerlaan, LA Amsterdam
| | - Ivo Krejci
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Laurine Marger
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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14
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Fan-Chiang YS, Chou PC, Hsiao YW, Cheng YH, Huang Y, Chiu YC, Lin YJ, Mine Y, Feng SW, Lee IT, Peng TY. Optimizing Dental Bond Strength: Insights from Comprehensive Literature Review and Future Implications for Clinical Practice. Biomedicines 2023; 11:2995. [PMID: 38001996 PMCID: PMC10669570 DOI: 10.3390/biomedicines11112995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 10/26/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
This review examines the modifying factors affecting bond strength in various bonding scenarios, particularly their relevance to the longevity of dental restorations. Understanding these factors is crucial for improving clinical outcomes in dentistry. Data were gathered from the PubMed database, ResearchGate, and Google Scholar resources, covering studies from 1992 to 2022. The findings suggest that for dentin-resin bonds, minimizing smear layers and utilizing MMP inhibitors to prevent hybrid layer degradation are essential. In the case of resin-resin bonds, reversing blood contamination is possible, but preventing saliva contamination is more challenging, underscoring its critical importance during clinical procedures. Additionally, while pretreatment on ceramics has minimal impact on bond strength, the influence of specific colorings should be carefully considered in treatment planning. This comprehensive review highlights that although established practices recognize significant bond strength factors, ongoing research provides valuable insights to enhance the clinical experience for patients. Once confirmed through rigorous experimentation, these emerging findings should be swiftly integrated into dental practice to improve patient outcomes.
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Affiliation(s)
- Yung-Shin Fan-Chiang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Peng-Chen Chou
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Wen Hsiao
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Hsuan Cheng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yi Huang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Chieh Chiu
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Ju Lin
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yuichi Mine
- Department of Medical Systems Engineering, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
- Project Research Center for Integrating Digital Dentistry, Hiroshima University, Hiroshima 734-8553, Japan
| | - Sheng-Wei Feng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Tzu-Yu Peng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
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15
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Nisar S, Liu H, Hass V, Wang Y. Dual-functional etchants that simultaneously demineralize and stabilize dentin render collagen resistant to degradation for resin bonding. Dent Mater 2023; 39:1004-1012. [PMID: 37734971 PMCID: PMC10591671 DOI: 10.1016/j.dental.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 08/24/2023] [Accepted: 09/15/2023] [Indexed: 09/23/2023]
Abstract
OBJECTIVES To develop dual-functional etchants that could demineralize and stabilize dentin collagen simultaneously, and to assess the effects of these etchants on collagen crosslinking, biostability and resin bonding properties under clinically relevant conditions. METHODS Dual-functional etchants were prepared by mixing 56% glycolic acid and 17% phosphoric acid and adding 1% of theaflavins (TF) or proanthocyanidins from grape seed extract (GSE). The etchant without crosslinker was used as control. The prepared human dentin specimens were treated with the 3 etchants for 30 s and analyzed for chemical interaction using Fourier transform infrared spectroscopy and resistance of the demineralized layer to collagenase degradation using electron microscopy (EM). Resin-dentin interfacial bonding properties were evaluated after 24 h and after 10,000 thermocycling through microtensile bond strength (μTBS), nanoleakage and matrix metalloproteinases (MMPs) activity via in situ zymography. Statistical analysis was done using ANOVA and post- hoc Tuckey's test. RESULTS Compared to control, TF and GSE dual-functional etchants were able to demineralize dentin, induce collagen crosslinking and protect the demineralized layer from collagenase degradation within 30 s. High resolution EM images showed better protection with TF etchant compared to GSE. There was a significant reduction in μTBS and an increase in nanoleakage and MMPs activity in control after thermocycling (p < 0.05) while these changes weren't seen in dual-functional etchants. SIGNIFICANCE Dual-functional etchants, especially TF containing, provide collagen protection against degradation and result in stable μTBS and less nanoleakage and MMPs activity under clinically relevant conditions.
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Affiliation(s)
- Saleha Nisar
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO 64108, USA
| | - Hang Liu
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO 64108, USA
| | - Viviane Hass
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO 64108, USA
| | - Yong Wang
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO 64108, USA.
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16
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Ferreira MN, Neves Dos Santos M, Fernandes I, Marto CM, Laranjo M, Silva D, Serro AP, Carrilho E, Botelho MF, Azul AM, Delgado AH. Effect of varying functional monomers in experimental self-adhesive composites: polymerization kinetics, cell metabolism influence and sealing ability. Biomed Mater 2023; 18:065014. [PMID: 37738988 DOI: 10.1088/1748-605x/acfc8d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 09/22/2023] [Indexed: 09/24/2023]
Abstract
The aim was to evaluate the effects of adding different functional monomers to experimental self-adhesive composites (SACs) on polymerization kinetics, cell metabolic activity, and sealing ability. SACs were formulated using urethane dimethacrylate as the base monomer and triethylene glycol dimethacrylate. Additionally, 10 wt.% of distinct functional monomers were added - 10-methacryloyloxydecyl dihydrogen phosphate, glycerol phosphate dimethacrylate (GPDM), 2-hydroxyethyl methacrylate (HEMA) or hydroxyethyl acrylamide (HEAA). ATR-FTIR was used to determine real-time polymerization kinetics (20 min,n= 3). The final extrapolated conversion and polymerization rates were determined (DC,max;Rp,max). TheDC,maxvalues were employed to calculate volumetric shrinkage. The MTT assay was performed on MDPC-23 cells using disc extracts at different concentrations (n= 8). Class V cavities were prepared in 60 sound human molars, assigned to six groups (n= 10), depending on the composite used and aging type (T0 or TC, if thermocycled for 10 000 cycles). One-way ANOVA, two-way, andKruskal-Wallistests were employed to treat the data (ɑ= 0.05). Varying the functional monomers had a large impact on DC,max, as confirmed by one-way ANOVA (p<0.001). The highest was obtained for HEMA (64 ± 3%). The HEMA and HEAA formulations were found to be significantly more toxic at concentrations below 100%. For microleakage, having a functional monomer or not did not show any improvement, irrespective of margin or aging period (Mann-Whitney U,p> 0.05). Larger functional monomers MDP and GPDM affected polymerization properties. Conversely, their acidity did not seem to be detrimental to cell metabolic activity. Regarding sealing ability, it seems that the functional monomers did not bring an advantage to the composites. Varying the functional monomer in SACs had a clear impact on the polymerization kinetics as well as on their cytotoxic potential. However, it did not confer better microleakage and sealing. Claiming self-adhesiveness based only on functional monomers seems dubious.
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Affiliation(s)
- Marta Nunes Ferreira
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
| | - Marta Neves Dos Santos
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
| | - Inês Fernandes
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
| | - Carlos Miguel Marto
- Institute of Experimental Pathology, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-354 Coimbra, Portugal
| | - Mafalda Laranjo
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-354 Coimbra, Portugal
| | - Diana Silva
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Ana Paula Serro
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Eunice Carrilho
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-354 Coimbra, Portugal
- Faculty of Medicine, Institute of Integrated Clinical Practice, University of Coimbra, 3004-531 Coimbra, Portugal
| | - Maria Filomena Botelho
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-354 Coimbra, Portugal
| | - Ana Mano Azul
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
| | - António Hs Delgado
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, 2829-511 Caparica, Almada, Portugal
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, NW3 2PF London, United Kingdom
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17
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Hanzen TA, de Paula AM, Grokoski E, de Oliveira ILM, Arana-Gordillo LA, de Melo Monteiro GQ, Perdigão J, Loguercio AD. Glutaraldehyde-based desensitizer does not influence postoperative sensitivity and clinical performance of posterior restorations: A 24-month randomized clinical trial. Dent Mater 2023; 39:946-956. [PMID: 37648563 DOI: 10.1016/j.dental.2023.08.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 09/01/2023]
Abstract
OBJECTIVES To evaluate the influence of a glutaraldehyde-based desensitizer (GL) on postoperative sensitivity (POS) in posterior bulk-fill resin composite restorations using an adhesive applied in the self-etch (SE) and etch-and-rinse (ER) strategies; and to assess the clinical performance of the restorations. METHODS Posterior resin composite restorations (n = 228) at least 3 mm deep were inserted in 57 subjects using a split-mouth design. The adhesive was applied with/without prior application of a GL. A resin composite was used for all restorations. Spontaneous POS (risk and intensity), as well as POS caused by stimulation with an air blast and assess the response to horizontal and vertical percussion was assessed using two scales in the baseline and after 7, 14, and 30 days. In addition, some parameters were evaluated using FDI criteria up to 24 months of clinical service. RESULTS No significant POS was observed (p > 0.05). A higher absolute risk and intensity of spontaneous POS was observed within 7 days (35.1%), without statistically significant differences among groups. At 24 months 5 restorations were considered clinically unsatisfactory, and 73 restorations showed minor discrepancies in adaptation, with no significant differences between groups (p > 0.05). SIGNIFICANCE A GL agent does not influence POS in posterior restorations with bulk-fill resin composite. It may be considered a dispensable clinical step in the restorative protocol.
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Affiliation(s)
| | | | - Eduardo Grokoski
- Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
| | | | | | | | - Jorge Perdigão
- University of Minnesota, Division of Operative Dentistry, Department of Restorative Sciences, Minneapolis, MN, USA.
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
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Chen H, Hou Y, Lin Q, Yu S, Bai T, Cui Z, Zhu S. Application of modified aldehyde compounds in self-etching bonding of dentin. J Mech Behav Biomed Mater 2023; 146:106087. [PMID: 37669579 DOI: 10.1016/j.jmbbm.2023.106087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 09/07/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the ability of 4-formylphenyl acrylate (FA) to enhance the bond strength and stabilize the resin-dentin bonding interface of universal adhesives in self-etching mode over time. METHODS Different concentrations of FA (1%, 3%, 5%, 7%, 9%) were prepared as primer. The optimal group was selected according to degree of conversion of 2 universal adhesives (Single Bond Universal (SBU)/All-Bond Universal (ABU)), and grouped according to the pre-treatment time (30s, 1min, 2min). The micro-tensile strength before and after 10,000 times thermocycling aging was used to evaluate the bonding performance. RESULTS The 1min application of FA (5%) increased the conversion rate of the adhesive. The expressions of microtensile bond strength and nanoleakage in the FA treatment group did not decrease significantly compared with their immediate values even after 10,000 thermocycling of aging. In situ zymography results showed that the hydrolytic activity of endogenous proteins decreased significantly in FA-1min group. CONCLUSIONS Treatment by FA primer can effectively enhance the bond stability at the bonding interface. CLINICAL RELEVANCE FA can be used as a functional monomer in self-etching bonding system to dentin, which not only had high biocompatibility, but also can show good collagen cross-linking ability within clinically acceptable application time.
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Affiliation(s)
- Huan Chen
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Yanyan Hou
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Qi Lin
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Shiyang Yu
- Sun Yat-Sen University Guanghua School of Stomatology, Hospital of Stomatology, Guangzhou, PR China
| | - Tingting Bai
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Zhanchen Cui
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, PR China.
| | - Song Zhu
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, PR China.
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19
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Peled Y, Stewart CA, Glogauer M, Finer Y. The Role of Bacterial, Dentinal, Salivary, and Neutrophil Degradative Activity in Caries Pathogenesis. Dent J (Basel) 2023; 11:217. [PMID: 37754337 PMCID: PMC10528424 DOI: 10.3390/dj11090217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/28/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023] Open
Abstract
Until recently, it was widely accepted that bacteria participate in caries pathogenesis mainly through carbohydrate fermentation and acid production, which promote the dissolution of tooth components. Neutrophils, on the other hand, were considered white blood cells with no role in caries pathogenesis. Nevertheless, current literature suggests that both bacteria and neutrophils, among other factors, possess direct degradative activity towards both dentinal collagen type-1 and/or methacrylate resin-based restoratives and adhesives, the most common dental restoratives. Neutrophils are abundant leukocytes in the gingival sulcus, where they can readily reach adjacent tooth roots or gingival and cervical restorations and execute their degradative activity. In this review, we present the latest literature evidence for bacterial, dentinal, salivary, and neutrophil degradative action that may induce primary caries, secondary caries, and restoration failure.
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Affiliation(s)
- Yuval Peled
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
| | - Cameron A. Stewart
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3E2, Canada
| | - Michael Glogauer
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Department of Dental Oncology, Maxillofacial and Ocular Prosthetics, Princess Margaret Cancer Centre, Toronto, ON M5G 2M9, Canada
| | - Yoav Finer
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3E2, Canada
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20
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Arandi NZ. The Classification and Selection of Adhesive Agents; an Overview for the General Dentist. Clin Cosmet Investig Dent 2023; 15:165-180. [PMID: 37692095 PMCID: PMC10488680 DOI: 10.2147/ccide.s425024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/23/2023] [Indexed: 09/12/2023] Open
Abstract
Adhesive agents are essential to most restorative procedures used in everyday practice. Depending on the clinical situation, the dentist will choose among a rapidly evolving variety of adhesive agents (bonding agents). Due to the availability of many adhesive agents, appropriate selection can take time and effort. Typically, a practitioner relies more on marketing and experience than in-depth material knowledge. The classification of adhesive agents may need to be clarified and easier to remember due to its lack of relevance to clinical procedures. This paper reviews the published literature retrieved from PubMed, Google Scholar, and Scopus by using specific keywords "adhesive agents", "classification", "dentin", "enamel", "universal", "self-etch", "etch-and-rinse", and "bonding". The titles and abstracts were screened, and the relevant literature was retrieved. The list of references from each identified article was examined to find other potentially relevant articles. Adhesive agents can be classified as etch-and-rinse, self-etch, or "multi-mode" according to their approach to interacting with the smear layer, and each approach can be further classified according to the number of clinical steps required during application. This article reviews the classification of current adhesive agents and discusses the properties that make a specific adhesive agent the optimal choice for a particular clinical indication. The review will assist the general dentist in understanding the various types of available adhesive agents and how they function. Overall, the review will facilitate decision-making and allow the selection of appropriate materials.
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Affiliation(s)
- Naji Ziad Arandi
- Department of Conservative Dentistry, Faculty of Dentistry, Arab American University, Jenin, Palestine
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21
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Wendlinger M, Nuñez A, Moreira P, Carneiro TS, Cochinski GD, Siqueira F, Cardenas A, Loguercio AD. Effect of the Absence of HEMA on the Bonding Properties of Universal Adhesive Systems Containing 10-MDP: An In Vitro Study. Oper Dent 2023; 48:500-512. [PMID: 37503689 DOI: 10.2341/22-050-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2023] [Indexed: 07/29/2023]
Abstract
OBJECTIVES To evaluate the absence of 2-hydroxyethyl methacrylate (HEMA) on the adhesive properties with enamel and dentin of universal adhesive systems containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP). METHODS AND MATERIALS One hundred and twelve caries-free third molars were used to test adhesion to dentin (n=64) and enamel (n=48). For each substrate, teeth were divided into eight experimental groups: four different adhesives each using two adhesive strategies. The adhesives used were: (1) Scotchbond Universal (SBU, 3M Oral Care, St Paul, MN, USA) as a HEMA-containing universal adhesive; (2) Gluma Bond Universal (GBU, Kulzer, Hanau, Germany); (3) Solare Universal Bond (SUB, GC, Tokyo, Japan); and (4) Zipbond Universal (ZIP, SDI, Victoria, Australia) as HEMA-free universal adhesives. The adhesive strategies used were etch-and-rinse (ER) and self-etch (SE). For dentin tests, the occlusal third of the crown of all teeth was removed and an adhesive protocol was applied. After completing the restoration, specimens were sectioned into bonded sticks (0.8 mm 2) and tested for microtensile bond strength (μTBS), in situ degree of conversion (DC), and nanoleakage (NL) by scanning electron microscopy. For enamel tests, teeth were sectioned into four parts (buccal, lingual, and proximal), and an adhesive protocol was applied. After completing the restoration, the specimens were tested for their microshear bond strength (μSBS). For in situ degree of conversion (DC) and nanoleakage (NL) evaluation of enamel, the specimens were sectioned in slices to be evaluated. The data for each substrate were subjected to two-way ANOVA and Tukey's test (α=0.05) for each property evaluated. RESULTS The SBU and ZIP adhesives showed the highest μSBS, and DC (dentin and enamel) and lower NL (dentin) values compared to GBU and SUB (p=0.001). However, SBU showed better results in terms of μTBS and μSBS (SE strategy), and DC (dentin and enamel) than ZIP. Strategy ER presented higher values of μTBS and μSBS when compared to strategy SE (p=0.001), except for SBU. CONCLUSION The effect of the absence of HEMA in commercial universal adhesive systems on enamel and dentin adhesive properties appears to be material-dependent.
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Affiliation(s)
- M Wendlinger
- Michel Wendlinger, DDS, Ms, PhD student, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - A Nuñez
- Alejandra Nuñez, DDS, MS, PhD student, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil, and professor, Department of Restorative Dentistry and Biomaterials, San Francisco de Quito University, Quito, Ecuador
| | - Pha Moreira
- Pedro Henrique Aguiar Moreira, DDS, MS student, Postgraduate Program in Dentistry, CEUMA University, São Luis, MA, Brazil
| | - T S Carneiro
- Taynara de Souza Carneiro, DDS, MS student Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil, and Health Sciences Faculty, Area of Stomatology, IDIBO research group Rey Juan Carlos University, Alcorcón, Madrid, Spain
| | - G D Cochinski
- Gabriel David Cochinski, DDS, MS student, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Fsf Siqueira
- Fabiana Suelen Figuerêdo de Siqueira, DDS, MS, PhD, professor, Postgraduate Program in Dentistry, CEUMA University, São Luis, MA, Brazil
| | - Afm Cardenas
- Andres Felipe Millan Cardenas, DDS, Ms, PhD, professor, Postgraduate Program in Dentistry, CEUMA University, São Luis, MA, Brazil
| | - A D Loguercio
- *Alessandro D. Loguercio, DDS, MS, PhD, professor, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
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22
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Zhong Q, Zhou Q, Xiao T, Li X, Xu W, Li Y, Tao Y, Wu L, Zhou Z, Wong HM, Li QL. Er:YAG Laser Physical Etching and Ultra-High-Molecular-Weight Cross-Linked Sodium Polyacrylate Chemical Etching for a Reliable Dentin Dry Bonding. ACS APPLIED MATERIALS & INTERFACES 2023; 15:39127-39142. [PMID: 37565782 DOI: 10.1021/acsami.3c07091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Dentin bond interface stability is the key issue of dental adhesion in present clinical dentistry. The concept of selective extrafibrillar demineralization has opened a new way to maintain intrafibrillar minerals to prevent interface degradation. Here, using ultra-high-molecular-weight sodium polyacrylate [Carbopol (Carbo) > 40 kDa] as a calcium chelator, we challenge this concept and propose a protocol for reliable dentin dry bonding. The results of high-resolution transmission electron microscopy revealed periodic bands of 67 nm dentin collagen fibrils after Carbo etching, and the hydroxyproline concentration increasing with prolonged chelating time denied the concept of extrafibrillar demineralization. The results that wet and dry bonding with Carbo-based demineralization produced a weaker bond strength than the traditional phosphoric acid wet adhesion suggested that the Carbo-based demineralization is an unreliable adhesion strategy. A novel protocol of Er:YAG laser physical etching followed by Carbo chemical etching for dentin adhesion revealed that a micro-/nano-level rough, rigid, and non-collagen exposed dentin surface was produced, the micro-tensile bond strength was maintained after aging under dry and wet bonding modes, and in situ zymography and nanoleakage within the hybrid layers presented lower signals after aging. Cell culture in vitro and a rabbit deep dentin adhesion model in vivo proved that this protocol is safe and biocompatible. Taken together, the concept of extrafibrillar demineralization is limited and insufficient to use in the clinic. The strategy of Er:YAG laser physical etching followed by Carbo chemical etching for dentin adhesion produces a bonding effect with reliability, durability, and safety.
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Affiliation(s)
- Qi Zhong
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Qingli Zhou
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Ting Xiao
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Xiaofeng Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Wu Xu
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Yuzhu Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Yang Tao
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Leping Wu
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
| | - Zheng Zhou
- School of Dentistry, University of Detroit Mercy, Detroit, Michigan 48208-2576, United States
| | - Hai Ming Wong
- Faculty of Dentistry, The Prince Philip Dental Hospital, The University of Hong Kong, Hong Kong 999077, China
| | - Quan-Li Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China
- Department of Stomatology, Longgang Otorhinolaryngology Hospital, Shenzhen 518172, China
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23
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Wang R, Hass V, Wang Y. Machine Learning Analysis of Microtensile Bond Strength of Dental Adhesives. J Dent Res 2023; 102:1022-1030. [PMID: 37464796 PMCID: PMC10477772 DOI: 10.1177/00220345231175868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023] Open
Abstract
Dental adhesives provide retention to composite fillings in dental restorations. Microtensile bond strength (µTBS) test is the most used laboratory test to evaluate bonding performance of dental adhesives. The traditional approach for developing dental adhesives involves repetitive laboratory measurements, which consumes enormous time and resources. Machine learning (ML) is a promising tool for accelerating this process. This study aimed to develop ML models to predict the µTBS of dental adhesives using their chemical features and to identify important contributing factors for µTBS. Specifically, the chemical composition and µTBS information of 81 dental adhesives were collected from the manufacturers and the literature. The average µTBS value of each adhesive was labeled as either 0 (if <36 MPa) or 1 (if ≥36 MPa) to denote the low and high µTBS classes. The initial 9-feature data set comprised pH, HEMA, BisGMA, UDMA, MDP, PENTA, filler, fluoride, and organic solvent (OS) as input features. Nine ML algorithms, including logistic regression, k-nearest neighbor, support vector machine, decision trees and tree-based ensembles, and multilayer perceptron, were implemented for model development. Feature importance analysis identified MDP, pH, OS, and HEMA as the top 4 contributing features, which were used to construct a 4-feature data set. Grid search with stratified 10-fold cross-validation (CV) was employed for hyperparameter tunning and model performance evaluation using 2 metrics, the area under the receiver operating characteristic curve (AUC) and accuracy. The 4-feature data set generated slightly better performance than the 9-feature data set, with the highest AUC score of 0.90 and accuracy of 0.81 based on stratified CV. In conclusion, ML is an effective tool for predicting dental adhesives with low and high µTBS values and for identifying important chemical features contributing to the µTBS. The ML-based data-driven approach has great potential to accelerate the discovery of new dental adhesives and other dental materials.
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Affiliation(s)
- R. Wang
- Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City, MO, USA
| | - V. Hass
- Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City, MO, USA
| | - Y. Wang
- Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City, MO, USA
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24
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Josic U, Mazzitelli C, Maravic T, Comba A, Cadenaro M, Radovic I, Sebold M, Turco G, Breschi L, Mazzoni A. The effect of carbodiimide on push-out bond strength of fiber posts and endogenous enzymatic activity. BMC Oral Health 2023; 23:399. [PMID: 37328778 PMCID: PMC10276460 DOI: 10.1186/s12903-023-03067-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 05/21/2023] [Indexed: 06/18/2023] Open
Abstract
BACKGROUND To investigate the effect of 0.3 M 1-ethyl-3(3-dimethylaminopropyl) carbodiimide (EDC) aqueous solution pretreatment on push-out bond strength (PBS) and matrix-metalloproteinases (MMPs) activity within radicular dentin when different post cementation strategies were employed. METHODS One hundred and twenty monoradicular human teeth were endodontically treated and randomly divided into six groups, depending on the cementation strategy and root dentin pretreatment (n = 20): EAR: cementation with an etch-and-rinse adhesive (LuxaBond Total Etch, DMG) and resin cement (LuxaCore Z Dual, DMG); EAR/EDC: 1 min EDC pretreatment after etching + EAR; SE: cementation with a self-etch primer (Multilink Primer, Ivoclar Vivadent) and corresponding cement (Multilink Automix, Ivoclar Vivadent); SE/EDC: self-etch primer + EDC pretreatment + SE; SA: cementation with a universal self-adhesive cement (RelyX Universal, 3 M); SA/EDC: EDC pretreatment + SA. Slices were submitted to PBS test and interfacial nanoleakage evaluation 24 h after cementation or after thermocycling (40.000 cycles, 5-55 °C). To investigate the effect of EDC on MMPs activity, 4 additional first maxillary premolars per group were processed for in situ zymography analysis. Multivariate ANOVA and post hoc Tukey tests were used to analyze PBS values. The data from in situ zymography were analyzed with Kruskal-Wallis test and Dunn's pairwise multiple comparison procedures (α = 0.05). RESULTS The variables "EDC pretreatment", "root region" and "thermocycling" significantly influenced PBS (p < 0.05), while the variable "cementation strategy" had no influence (p > 0.05). Thermocycling significantly reduced PBS in SE and SA groups (p < 0.05). EDC was effective in preserving PBS after artificial aging. EDC pretreatment significantly reduced enzymatic activity at baseline in EAR and SE groups, and in SA group after thermocycling (p < 0.05). CONCLUSIONS The use of EDC prevents the reduction of bond-strength values after artificial aging and silences endogenous enzymatic activity within radicular dentin when different cementation strategies were employed.
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Affiliation(s)
- Uros Josic
- Department for Biomedical and Neuromotor Sciences, Dental Clinic, DIBINEM, University of Bologna, Via San Vitale 59, Bologna, 40125, Italy
| | - Claudia Mazzitelli
- Department for Biomedical and Neuromotor Sciences, Dental Clinic, DIBINEM, University of Bologna, Via San Vitale 59, Bologna, 40125, Italy
| | - Tatjana Maravic
- Department for Biomedical and Neuromotor Sciences, Dental Clinic, DIBINEM, University of Bologna, Via San Vitale 59, Bologna, 40125, Italy
| | - Allegra Comba
- Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Milena Cadenaro
- Department of Medical Sciences, University of Trieste, Trieste, Italy
- Institute for Maternal and Child Health-IRCCS "Burlo Garofolo,", Trieste, Italy
| | - Ivana Radovic
- Clinic for Paediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Maicon Sebold
- Department of Restorative Dentistry, Operative Dentistry Division, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Gianluca Turco
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Lorenzo Breschi
- Department for Biomedical and Neuromotor Sciences, Dental Clinic, DIBINEM, University of Bologna, Via San Vitale 59, Bologna, 40125, Italy
| | - Annalisa Mazzoni
- Department for Biomedical and Neuromotor Sciences, Dental Clinic, DIBINEM, University of Bologna, Via San Vitale 59, Bologna, 40125, Italy.
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25
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Wang L, Bai X, Liu Y, Islam R, Hoshika S, Sano H, Yang F. The Effect of an Extra Hydrophobic Resin Layer on the Bond Strength and Durability of One-Step Universal Adhesives Used as a Primer. J Dent 2023:104568. [PMID: 37308054 DOI: 10.1016/j.jdent.2023.104568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/14/2023] Open
Abstract
OBJECTIVES To determine the effect of an extra hydrophobic resin layer (EHL) on the bond strength and durability of three different pH one-step universal adhesives (UAs) utilized in self-etch (SE) mode, and to explore whether UAs can be used as a primer in two-step bonding system. METHODS Three different pH UAs were utilized: G-Premio Bond (GPB), Scotchbond Universal (SBU), All-Bond Universal (ABU), while the bonding agent of Clearfil SE Bond 2 (SE2) was selected as the EHL. For the EHL groups, EHL was applied after the air blow of each UA and before light curing. The microtensile bond strength (μTBS), fracture modes, interfacial structures and nanoleakage (NL) were evaluated after 24 h water storage and after 15,000 thermal cycling (TC). Elastic modulus (EM) and hardness (H) was tested by a nanoindenter after 24 h. RESULTS Significantly higher μTBS was achieved in the GPB+EHL group compared with GPB both at 24 h and after 15,000 TC, while the additional use of EHL did not improve the μTBS of SBU and ABU significantly both at 24 h and after 15,000 TC. GPB+EHL demonstrated lower NL than GPB. The mean EM and H of the adhesive layer in GPB+EHL was significantly decreased compared with GPB. CONCLUSIONS The results indicated that the bond strength and durability of low pH one-step UA (GPB) were significantly improved by additional application of EHL both at 24 h and after 15,000 TC, while no significant improvement was observed for ultra-mild one-step UAs (SBU and ABU). CLINICAL SIGNIFICANCE This study indicates that GPB can be used as a primer in a two-step bonding system, while SBU and ABU may not be as effective. These findings may help guide clinicians in selecting the appropriate UAs and bonding techniques for different clinical scenarios.
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Affiliation(s)
- Linhong Wang
- Center for Plastic & Reconstructive Surgery, Department of Stomatology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, Zhejiang, China.; Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Xiaolei Bai
- Department of Stomatology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, Zhejiang, China
| | - Yunqing Liu
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Rafiqul Islam
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Shuhei Hoshika
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Hidehiko Sano
- Department of Restorative Dentistry, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Fan Yang
- Center for Plastic & Reconstructive Surgery, Department of Stomatology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, Zhejiang, China..
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26
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Alshabib A, Abid Althaqafi K, AlMoharib HS, Mirah M, AlFawaz YF, Algamaiah H. Dental Fiber-Post Systems: An In-Depth Review of Their Evolution, Current Practice and Future Directions. Bioengineering (Basel) 2023; 10:bioengineering10050551. [PMID: 37237621 DOI: 10.3390/bioengineering10050551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/28/2023] Open
Abstract
The field of dental medicine is constantly evolving and advancing toward minimally invasive techniques. Several studies have demonstrated that bonding to the tooth structure, particularly enamel, yields the most predictable results. In some instances, however, significant tooth loss, pulpal necrosis, or irreversible pulpitis may limit the options available to the restorative dentist. In these cases, placement of a post and core followed by a crown is the preferred treatment option, provided all requirements are met. This literature review provides an overview of the historical development of dental FRC post systems as well as a comprehensive examination of the currently available posts and their bonding requirements. In addition, it offers valuable insights for dental professionals seeking to understand the current state of the field and the prospects of dental FRC post systems.
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Affiliation(s)
- Abdulrahman Alshabib
- Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Khaled Abid Althaqafi
- Department of Restorative Dental Department, College of Dentistry, University of Umm Al Qura, Makkah 24211, Saudi Arabia
| | - Hani S AlMoharib
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Mahir Mirah
- Department of Restorative Dental Science, Dental College, and Hospital, Taibah University, Madinah 42353, Saudi Arabia
| | - Yasser F AlFawaz
- Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Hamad Algamaiah
- Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
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27
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Mokeem LS, Garcia IM, Melo MA. Degradation and Failure Phenomena at the Dentin Bonding Interface. Biomedicines 2023; 11:biomedicines11051256. [PMID: 37238927 DOI: 10.3390/biomedicines11051256] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/20/2023] [Accepted: 04/22/2023] [Indexed: 05/28/2023] Open
Abstract
Damage in the bonding interface is a significant factor that leads to premature failure of dental bonded restorations. The imperfectly bonded dentin-adhesive interface is susceptible to hydrolytic degradation and bacterial and enzyme attack, severely jeopardizing restorations' longevity. Developing caries around previously made restorations, also called "recurrent or secondary caries," is a significant health problem. The replacement of restorations is the most prevailing treatment in dental clinics, leading to the so-called "tooth death spiral". In other words, every time a restoration is replaced, more tooth tissue is removed, increasing the size of the restorations until the tooth is eventually lost. This process leads to high financial costs and detriment to patients' quality of life. Since the complexity of the oral cavity makes prevention a challenging task, novel strategies in Dental Materials and Operative fields are required. This article briefly overviews the physiological dentin substrate, features of dentin bonding, challenges and clinical relevance. We discussed the anatomy of the dental bonding interface, aspects of the degradation at the resin-dentin interface, extrinsic and intrinsic factors affecting dental bonding longevity, perspectives on resin and collagen degradation and how these subjects are connected. In this narrative review, we also outlined the recent progress in overcoming dental bonding challenges through bioinspiration, nanotechnology and advanced techniques to reduce degradation and improve dental bonding longevity.
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Affiliation(s)
- Lamia Sami Mokeem
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Isadora Martini Garcia
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mary Anne Melo
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
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Mao C, He H, Chen C, Gu X. Synergistic effect of collagen cross-linking and remineralization for improving resin-dentin bond durability. Eur J Oral Sci 2023; 131:e12928. [PMID: 36931874 DOI: 10.1111/eos.12928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 02/17/2023] [Indexed: 03/19/2023]
Abstract
In this study, the synergistic effect of glutaraldehyde-cross-linking and remineralization on the strength and durability of resin-dentin bonds was investigated. Dentin surfaces were etched with 35% phosphoric acid. The control specimens were bonded with Adper Single Bond 2 using wet bonding without pretreatment. The experimental specimens were pretreated with 5% (v/v) glutaraldehyde solution for 3 min and placed in a remineralizing solution for 0, 12, and 24 h, followed by dry bonding. After performing composite build-ups on the specimens, they were longitudinally sectioned, immediately, and after aging for 3 h with sodium hypochlorite (NaOCl), to evaluate microtensile bond strength (µTBS). The cross-linked specimens exhibited µTBS values comparable with those of the control group, but the µTBS decreased significantly after NaOCl aging. The cross-linked dentin remineralized for 24 h exhibited an increase in µTBS. After aging in NaOCl, the µTBS of the specimens remineralized for 24 h did not decrease and was significantly higher than for the other experimental groups. Cross-linking with dry bonding maintained µTBS in specimens before aging in NaOCl, but the bonding durability was compromised. Remineralization of cross-linked dentin for 24 h followed by dry bonding increased the immediate µTBS and improved bond durability. Therefore, combining cross-linking with remineralization of collagen fibrils progressively increased resistance to degradation, improving bond durability.
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Affiliation(s)
- Caiyun Mao
- Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, P.R. China
| | - Huihui He
- Zhejiang University School of Stomatology, Hangzhou, Zhejiang Province, P.R. China
| | - Chaoqun Chen
- Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, P.R. China
| | - Xinhua Gu
- Department of Stomatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, P.R. China
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Lambert H, Corn S, Léger R, Ienny P, Slangen P, Fages M. Ceramic Bonding Interface under Shear-Compression Stress: Ultra-High-Speed Imaging Contribution. J Dent Res 2023; 102:295-301. [PMID: 36562502 DOI: 10.1177/00220345221138500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The aim of this study is to visualize and characterize by ultra-high-speed imaging (UHSI) the failure phenomena at the resin-ceramic bonding interface of lithium disilicate (LiSi2) samples bonded with gold-standard protocol (Monobond Plus [MB]) and the nontoxic one (Monobond Etch & Prime [MEP]) subjected to mechanical loading. Unprecedented frame rate, image resolution, and recording time were reached by using the most advanced UHSI camera. The finite element analysis (FEA) of the proposed mechanical test confirmed that the specific design of our samples enables a combined shear and compression stress state, prone to test the bonding interface while being close to physiological stresses. Ten LiSi2 samples were pretreated by gold standard (MB, n = 5) and self-etching primer (MEP, n = 5). Axial compression loading gradually increased until catastrophic failure was performed. As shown by the FEA, the angle between the bonding interface and load direction leads to shear-compression stresses at the resin-ceramic bonding interface. Failure was recorded by UHSI at 300,000 fps. All recorded images were analyzed to segregate events and isolate the origin of fracture. For the first time, thanks to the image recording setup, it was observed that debonding is the first event before breakage, highlighting that sample fracture occurs by interfacial rupture followed by slippage and cohesive failure of materials. Failure mode could be described as mixed. MEP and MB showed similar results and behavior.
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Affiliation(s)
- H Lambert
- Laboratory Bioengineering and Nanosciences, University of Montpellier, Montpellier, France.,Department of Prosthetic Dentistry, Faculty of Odontology, Montpellier University, France
| | - S Corn
- LMGC, Univ Montpellier, IMT Mines Ales, CNRS, Ales, France
| | - R Léger
- LMGC, Univ Montpellier, IMT Mines Ales, CNRS, Ales, France
| | - P Ienny
- LMGC, Univ Montpellier, IMT Mines Ales, CNRS, Ales, France
| | - P Slangen
- EuroMov Digital Health in Motion, Univ Montpellier, IMT Mines Ales, Ales, France
| | - M Fages
- Laboratory Bioengineering and Nanosciences, University of Montpellier, Montpellier, France.,Department of Prosthetic Dentistry, Faculty of Odontology, Montpellier University, France
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Yang ZY, Gao J, Duan LY, Luo ML, Yu F, Xu RC, Zhou MD, Tay FR, Niu LN, Zhou W, Chen JH. Evaluation of a novel primer containing isocyanate group on dentin bonding durability. Dent Mater 2023; 39:455-462. [PMID: 37002165 DOI: 10.1016/j.dental.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 02/05/2023] [Accepted: 03/03/2023] [Indexed: 03/31/2023]
Abstract
OBJECTIVES To evaluate the benefits of a novel dentin-bonding primer, namely, isocyanate-terminated urethane methacrylate precursor (UMP), which can form covalent bonds with demineralized dentin collagen. METHODS The synthesized and purified UMP monomer was characterized and tested its effects on the degree of conversion (DC) and wettability of an acetone-based dental adhesive. Then UMP primers of different concentrations were formulated and used to prepare adhesive specimens, which were compared with solvent-treated groups. Primer-treated specimens with and without aging were also compared. To evaluate the bonding interface, microtensile strength tests, nano-indentation tests and nanoleakage- eavaluation were performed using a field-emission scanning electron microscope and nano-indenter. Data were analyzed using SPSS 20.0 software with significance set at α = 0.05 using one-way analysis of variance (ANOVA) and two-way ANOVA to characterize the effects of the primer. RESULTS Treatment with the UMP primer promoted the DC and wettability of the adhesive on the demineralized dentin surface (P < 0.05); it also increased the bond strength of the aged dentin bonding interface (P < 0.05). Nanoleakage was reduced; the bonding interface became more stable, and the continuity and strength of the hybrid layer improved (P < 0.05) following UMP treatment. The application of 5 mM UMP as a primer for dentin bonding could lead to a stable bonding interface and long-lasting bonding effects. SIGNIFICANCE The use of 5 mM UMP primer developed in this study could improve dentin bonding durability and has excellent clinical application prospects.
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Porto ICCDM, Lôbo TDLGF, Rodrigues RF, Lins RBE, da Silva MAB. Insight into the development of versatile dentin bonding agents to increase the durability of the bonding interface. FRONTIERS IN DENTAL MEDICINE 2023. [DOI: 10.3389/fdmed.2023.1127368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Despite the huge improvements made in adhesive technology over the past 50 years, there are still some unresolved issues regarding the durability of the adhesive interface. A complete sealing of the interface between the resin and the dentin substrate remains difficult to achieve, and it is doubtful whether an optimal interdiffusion of the adhesive system within the demineralized collagen framework can be produced in a complete and homogeneous way. In fact, it is suggested that hydrolytic degradation, combined with the action of dentin matrix enzymes, destabilizes the tooth-adhesive bond and disrupts the unprotected collagen fibrils. While a sufficient resin–dentin adhesion is usually achieved immediately, bonding efficiency declines over time. Thus, here, a review will be carried out through a bibliographic survey of scientific articles published in the last few years to present strategies that have been proposed to improve and/or develop new adhesive systems that can help prevent degradation at the adhesive interface. It will specially focus on new clinical techniques or new materials with characteristics that contribute to increasing the durability of adhesive restorations and avoiding the recurrent replacement restorative cycle and the consequent increase in damage to the tooth.
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Effect of an additional bonding resin on the 5-year performance of a universal adhesive: a randomized clinical trial. Clin Oral Investig 2023; 27:837-848. [PMID: 35821134 DOI: 10.1007/s00784-022-04613-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/29/2022] [Indexed: 02/03/2023]
Abstract
OBJECTIVES To evaluate the effect of the application of an additional hydrophobic bonding resin on the clinical performance of a universal adhesive applied in etch-and-rinse (ER) or self-etch adhesive (SE) strategy in non-carious cervical lesions (NCCLs) after 5 years. MATERIALS AND METHODS Scotchbond Universal Adhesive (3M Oral Care) was applied in 134 NCCLs of 39 subjects using different adhesion approaches: 3-step ER (3-ER), 2-step ER (2-ER), 2-step SE (2-SE), and 1-step SE (1-SE). Enamel and dentin were acid etched prior to application of the universal adhesive for the 3-ER and 2-ER groups. An extra layer of a hydrophobic bonding resin was applied for groups 3-ER and 2-SE. All lesions were restored with Filtek Supreme XTE resin composite (3M Oral Care). Restorations were evaluated at baseline and at 5 years using the modified USPHS criteria. Mann-Whitney U and Wilcoxon tests were performed, and the survival rates (retention/fracture) were analyzed using Kaplan-Meier and log-rank tests (p < 0.05). RESULTS The recall rate was 66.7% at 5 years. The cumulative survival rate was 96.9% for 3-ER, 96.8% for 2-ER, 71.4% for 2-SE, and 81.3% for 1-SE strategies. The log-rank test was statistically significant (p = 0.006). Retention rates were 100% for both ER groups, 75% for 2-SE and 81.3% for 1-SE. At 5 years, 2- and 1-SE approaches showed similar retention rates, but lower than those for 3- and 2-ER. A significant decrease in retention rate was detected for 2-SE (p = 0.007) and 1-SE (p = 0.014) groups between baseline and 5 years. All groups, except 2-ER, showed an increase in marginal discoloration. For this parameter, significant differences were detected between 2-ER and 1-SE (p = 0.004). CONCLUSIONS The addition of a hydrophobic bonding resin to the recommended application sequence of Scotchbond Universal Adhesive did not improve its clinical performance in NCCLs after 5 years. Higher retention rates were measured when this adhesive was applied in ER mode. TRIAL REGISTRATION This manuscript is a 5-year follow-up of a randomized clinical trial that started in 2012 when there was no strong recommendation for registration in clinicaltrials.gov. The results after 36 months of clinical service were previously published in this journal.
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Temel UB, Kam Hepdeniz O, Gulec A. Evaluation of the bonding effectiveness of a universal adhesive to the plasma-activated dentin surface. Eur J Oral Sci 2023; 131:e12914. [PMID: 36617641 DOI: 10.1111/eos.12914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 12/21/2022] [Indexed: 01/10/2023]
Abstract
This study aimed to evaluate the effect of non-thermal atmospheric pressure plasma on the bond strength of a universal adhesive used in etch-and-rinse mode. Dentin surfaces were etched with phosphoric acid and samples were divided into groups exposed to either dry bonding, plasma-dried bonding, plasma-dried and rewetted bonding, or wet bonding (n = 10). Dentin surfaces of the plasma-dried specimens were treated with a plasma jet before the adhesive procedure. After application, composite blocks were built, and specimens were subjected to micro-tensile bond strength testing after 24 h and after 10,000 thermal cycles. The hybrid layer formation was evaluated by micro-Raman spectral analysis; the resin-dentin interface was analyzed by scanning electron microscopy. One-way ANOVA and Tukey's post hoc multiple comparison tests were used to statistically analyze the data. The bond strength values of the plasma-dried bonding groups were statistically higher than the non-plasma-treated groups both before and after aging. After the thermal cycles, bond strength values decreased significantly only in the wet bonding group. Micro-Raman spectral analysis revealed that plasma-drying increased adhesive penetration, especially hydrophobic monomer infiltration. This may increase the mechanical properties and durability of the resin-dentin interface, provide long-term stability, and improve the polymerization rate of the adhesive layer.
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Affiliation(s)
- Ugur Burak Temel
- Faculty of Dentistry, Department of Restorative Dentistry, Suleyman Demirel University, Isparta, Turkey
| | - Ozge Kam Hepdeniz
- Faculty of Dentistry, Department of Restorative Dentistry, Suleyman Demirel University, Isparta, Turkey
| | - Ali Gulec
- Faculty of Technology, Department of Biomedical Engineering, Isparta University of Applied Sciences, Isparta, Turkey
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Chen H, Sun G, Wang H, Yu S, Tian Z, Zhu S. Effect of collagen cross-linkers on dentin bond strength: A systematic review and network meta-analysis. Front Bioeng Biotechnol 2023; 10:1100894. [PMID: 36760752 PMCID: PMC9903368 DOI: 10.3389/fbioe.2022.1100894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 12/14/2022] [Indexed: 01/25/2023] Open
Abstract
Objective: This study aimed to evaluate the role of collagen cross-linkers in the bonding performance of the resin-dentin interface through a systematic review and a network meta-analysis. Sources: The literature search was conducted in several databases like PubMed, EMBASE, Cochrane, Scopus and Web of Science from their inception till 30 April 2022. Study selection: The inclusion criteria consisted of in vitro studies evaluating the micro-tensile and micro-shear bond strengths of different cross-linkers acting on dentin. Bayesian network meta-analysis was conducted using RStudio. Data: Out of the 294 studies evaluated in the full-text analysis, 40 were included in the systematic review and meta-analysis. Most studies have used cross-linkers as primer (65.1%), followed by incorporating them into in adhesives and acid etching agents. The application methods of the adhesive system were classified as "etch-and-rinse (ER) adhesives" (77%) and "self-etching (SE) adhesives". Moreover, there were six types of cross-linkers in this presented review, of which the most numerous were polyphenols. Conclusion: Different application methods of cross-linkers, the long-term results showed that were only effective when used for longer durations, the immediate results were not statistically different. According to immediate and long-term results, etch-and-rinse (ER) adhesives showed a greater bonding performance than the control groups (p ≤ 0.05), whereas self-etching (SE) adhesives showed similar bond strength values (p ≥ 0.05). The result of network meta-analysis (NMA) showed that Dope like compound showed higher long-term bonding performance than other cross-linkers. Clinical significance: Long-term clinical studies may be needed to determine the effect of the cross-linkers on the bonding properties.
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Zhao S, Zhang Y, Chen Y, Xing X, Wang Y, Wu G. Evaluation of Chitosan-Oleuropein Nanoparticles on the Durability of Dentin Bonding. Drug Des Devel Ther 2023; 17:167-180. [PMID: 36712950 PMCID: PMC9879028 DOI: 10.2147/dddt.s390039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 01/14/2023] [Indexed: 01/23/2023] Open
Abstract
Purpose To evaluate the effects of dentin pretreatment with chitosan-loaded oleuropein nanoparticles (CONPs) on the durability of resin-dentin bonding interfaces. Methods Eighty freshly extracted non-carious human third molars were randomly divided into four groups (n = 20 each): a de-ionized water (DW) group, a chitosan (CS) group, a chlorhexidine (CHX) group and a CONP group. The dentin in the DW, CS, CHX, and CONP groups were pretreated with de-ionized water, 1.0 mg/L CS solution, 2% chlorhexidine solution, and CONP suspension (prepared with 100 mg/L oleuropein), respectively, followed by the universal adhesive and resin composites. The bonded teeth of each group were randomly divided into two subgroups: an immediate subgroup and an aged subgroup. The bonded teeth of each group were then cut into the bonded beams. We measured their microtensile bond strength (μTBS), observed the characteristics of bonding interface by atomic force microscope, calculated the percentage of silver particles in a selected area for interfacial nanoleakage analysis, and evaluated the endogenous gelatinase activity within the bonding interface for in-situ zymogram analysis. Data were analyzed with two-way ANOVA and LSD multiple comparison test (P < 0.05). Results Regardless of after 24 h or after thermocycling, CONP exhibited better μTBS (P < 0.05) than the other three groups except that there was not a statistical significance (P > 0.05) in the CONP and CHX groups after 24 h. Besides, the CONP group presented significantly higher modulus of elasticity in the hybrid layers (P < 0.05), lower expression of nanoleakage (P < 0.05), and better inhibitory effect of matrix metalloproteinases than the other three groups before and after thermocycling. Conclusion Altogether, the CONPs had the potential to act as a dentin primer, which could effectively improve the dentin-resin binding durability.
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Affiliation(s)
- Shuya Zhao
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People’s Republic of China
| | - Yunyang Zhang
- Center of Modem Analysis, Nanjing University, Nanjing, People’s Republic of China
| | - Yun Chen
- Department of Pediatric Dentistry, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Xianghui Xing
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People’s Republic of China
| | - Yu Wang
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People’s Republic of China
| | - Guofeng Wu
- Department of Prosthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People’s Republic of China,Correspondence: Guofeng Wu; Xianghui Xing, Email ;
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Ma KSK, Wang LT, Blatz MB. Efficacy of adhesive strategies for restorative dentistry: A systematic review and network meta-analysis of double-blind randomized controlled trials over 12 months of follow-up. J Prosthodont Res 2023; 67:35-44. [PMID: 35691823 DOI: 10.2186/jpr.jpr_d_21_00279] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE The efficacy of etch-and-rinse, selective enamel-etching, and self-etching protocols for universal adhesives in follow-ups of over 12 months was compared in a network meta-analysis. STUDY SELECTION Randomized controlled trials (RCTs) published from 1998 to 2022 that compared marginal staining, marginal adaptation, retention and fractures, post-operative sensitivity, or recurrence of caries that took place over 12-months post-restoration were selected. A network meta-analysis determined the performance of each adhesive protocol. RESULTS After screening 981 articles, 16 RCTs were subjected to data extraction. Of which, 674 patients with 2816 restorations, were included in the network meta-analysis. The pooled risk of marginal discoloration following self-etching was significantly higher than that following etch-and-rinse at over 12, 24, and 36 months, which was time-dependent. The pooled risks of unfavorable marginal adaptation and unfavorable retention and fractures following self-etching were also significantly higher than that following etch-and-rinse, with the rates of unfavorable retention and fractures in non-carious cervical lesions increasing in a time-dependent manner. The pooled risks of marginal discoloration, unfavorable marginal adaptation, retention and fractures were similar between etch-and-rinse and selective enamel-etching protocols. Post-operative hypersensitivity and recurrence of caries were not significantly different among etch-and-rinse, selective enamel-etching, and self-etching protocols. CONCLUSIONS In follow-ups over 12 months, esthetic and functional outcomes of restorations completed with an etch-and-rinse adhesive protocol were superior to the ones achieved with a self-etching strategy without selective enamel-etching. Selective enamel etching is recommended for self-etching systems. Biological responses were similar for all three adhesive strategies.
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Affiliation(s)
- Kevin Sheng-Kai Ma
- Center for Global Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA.,Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | - Li-Tzu Wang
- National Taiwan University (NTU) Hospital and College of Medicine, NTU, Taipei, Taiwan
| | - Markus B Blatz
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA
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Effect of Different Application Modalities on the Bonding Performance of Adhesive Systems to Dentin: A Systematic Review and Meta-Analysis. Cells 2023; 12:cells12010190. [PMID: 36611983 PMCID: PMC9818277 DOI: 10.3390/cells12010190] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/11/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
Diverse types of dental adhesives exhibit different cytotoxic outcomes on cells in vitro. Currently, no standard adhesive application technique has so far been decisive for clinicians for better durability of resin-dentin bonds of adhesive systems. The purpose of this study was to systematically review the literature to evaluate the bonding performance of adhesive systems to dentin by using different application modalities. The systematic research strategy was conducted by two reviewers among multiple databases: PubMed, Scopus, Web of Science, Embase, and Scielo. In vitro studies reporting the effects of additional steps for the application of adhesive systems on the bond strength to dentin were selected. Meta-analysis was performed using Review Manager Software version 5.3.5 using the random effects model. The methodological quality of each in vitro study was assessed according to the parameters of a previous systematic review. The electronic research through different databases generated a total of 8318 references. After the examination of titles and abstracts, a total of 106 potentially relevant studies accessed the full-text evaluation phase. After full-text examination, 78 publications were included for the qualitative analysis, and 68 studies were included in the meta-analysis. Regarding the etch-and-rinse adhesive systems, the application modalities that improved the overall bond strength were the application of a hydrophobic resin layer (p = 0.005), an extended application time (p < 0.001), an application assisted by an electric current (p < 0.001), a double-layer application (p = 0.05), the agitation technique (p = 0.02), and the active application of the adhesive (p < 0.001). For self-etch adhesive systems, the techniques that improved the overall bond strength were the application of a hydrophobic resin layer (p < 0.001), an extended application time (p = 0.001), an application assisted by an electric current (p < 0.001), a double-layer application (p < 0.001), the agitation technique (p = 0.01), and the active application of the adhesive (p < 0.001). The in vitro evidence suggests that the application of adhesive systems using alternative techniques or additional strategies may be beneficial for improving their bond strength to dentin. The application modalities that favored the overall bond strength to dentin were an extended application time, a double-layer application, an application assisted by an electric current, the active application of the adhesive, and the application of a hydrophobic resin layer. Worth mentioning is that some techniques are intended to increase the degree of the conversion of the materials, and therefore, improvements in the biocompatibility of the materials can be expected.
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Sun G, Chen X, Wei F, Bai T, Zhu S. Effects of Er: YAG, Er,Cr: YSGG, and Nd: YAG laser irradiation and adhesive systems on the immediate and long-term bond strength of dentin: a systematic review and meta-analysis. Lasers Med Sci 2023; 38:32. [PMID: 36595096 DOI: 10.1007/s10103-022-03699-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 12/23/2022] [Indexed: 01/04/2023]
Abstract
At present, lasers are increasingly used in the oral clinical field, and research and applications in dental hard tissue treatment are also increasing. The effect of laser etching dentin on the bonding strength of composite resin reported in the literature is still inconclusive. The purpose of this review was to evaluate whether laser etching can improve the immediate and long-term bonding strength of dentin and investigate the effect of different types of adhesives on the bonding strength of dentin. Two reviewers performed a literature search up from January 2012 to November 2021 in four databases: MEDLINE (PubMed), Web of Science, EMBASE, and the Cochrane Library. A total of 25 studies were included in the meta-analysis. The Cochrane Collaboration Bias Risk Assessment tool was used to evaluate the quality of the included literature, and an analysis was carried out using Review Manager Software version 5.3. The aging bond strength of dentin after erbium (Er): yttrium aluminum garnet (YAG) laser treatment was significantly lower than that of dentin in the bur group (P < 0.00001). At the same time, the bond strength of dentin immediately and aging after (Er), chromium-doped (Cr): yttrium scandium gallium garnet (YSGG) laser treatment was lower than that of dentin in the bur group (P < 0.05). There was no significant difference in the immediate and aging bonding strength among samples in the Er: YAG laser, Er, Cr: YSGG laser, and blank control groups (no laser or bur). The aging bond strength of samples after neodymium-doped (Nd): YAG laser treatment was higher than that of samples in the blank control group (P < 0.05); in addition, the performance of self-etching adhesive was slightly better than that of acid etching adhesive. Regardless of the applied surface treatment and the adhesive employed, dentin after aging showed significant bond degradation (P < 0.05). There was high heterogeneity of bond strength between different groups, and the small number of studies and the contradictory results may be the main reasons for this outcome.
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Affiliation(s)
- Guangdi Sun
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China
| | - Xue Chen
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China
| | - Fei Wei
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China
| | - Tingting Bai
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China
| | - Song Zhu
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China.
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012, Jilin, China.
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Alves LVGL, Fracasso LM, Cortez TV, Souza-Gabriel AE, Corona SAM. Epigallocatechin-3-gallate prior to composite resin in abfraction lesions: a split-mouth randomized clinical trial. Restor Dent Endod 2023. [DOI: 10.5395/rde.2023.48.e13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Tang C, Ahmed MH, Yao C, Mercelis B, Yoshihara K, Peumans M, Van Meerbeek B. Experimental two-step universal adhesives bond durably in a challenging high C-factor cavity model. Dent Mater 2023; 39:70-85. [PMID: 36481302 DOI: 10.1016/j.dental.2022.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 11/20/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To determine the bonding effectiveness of experimental 2-step universal adhesives (UAs) to high C-factor class-I cavity-bottom dentin and to assess the potential bond-strength contribution of an additional flowable composite layer. METHODS Three experimental 2-step UA formulations, involving the application of a 10-MDP-based primer followed by a hydrophobic adhesive resin with a 15-to-20-µm film thickness and differing only for filler, referred to as BZF-21 (silica and bioglass filler), BZF-29 (silica filler) and BZF-29_hv (higher silica-filler loading resulting in a higher viscosity), all prepared by GC, along with three representative commercial adhesives, Clearfil SE Bond 2 (C-SE2, Kuraray Noritake), G-Premio Bond (G-PrB, GC) and OptiBond FL (Opti-FL, Kerr), were comparatively investigated for their 'immediate' and 'aged' (50,000 thermocycles) micro-tensile bond strength (μTBS), when applied either in etch-and-rinse (E&R) or self-etch (SE) mode, to high C-factor class-I cavity-bottom dentin (n = 10; 10 experimental groups). Four additional experimental groups involved the extra application of the flowable composite G-ænial Universal Flo (GC), employed as an intermediate liner in combination with the adhesives BZF-29 and G-PrB and again applied both in E&R or SE mode. Statistical analysis was performed using linear mixed-effects (LME) modelling and linear regression analysis (p < 0.05). RESULTS All 2-step UAs performed similarly when compared to the gold-standard E&R Opti-FL and SE C-SE2 adhesives, except for the aged μTBS of BZF-29_hv applied in E&R mode, and significantly outperformed the 1-step UA G-PrB. Significant reduction in μTBS upon aging was only recorded for 2-step UAs applied in E&R mode. The extra flowable composite layer significantly improved G-PrB's μTBS. SIGNIFICANCE The experimental 2-step UAs revealed favorable bonding performance in the challenging high C-factor class-I cavity model, comparable to that of the multi-step gold-standard E&R and SE adhesives and superior to that of the 1-step UA investigated. An additionally applied flowable composite layer compensated for the lower bonding effectiveness of the 1-step UA in the high C-factor cavity model.
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Affiliation(s)
- Chuliang Tang
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Mohammed H Ahmed
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium; Tanta University, Faculty of Dentistry, Department of Dental Biomaterials, Tanta 32511, Egypt
| | - Chenmin Yao
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium; Wuhan University, School & Hospital of Stomatology, The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, Wuhan 430079, China
| | - Ben Mercelis
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Kumiko Yoshihara
- Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Pathology & Experimental Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; National Institute of Advanced Industrial Science and Technology (AIST), Health and Medical Research Institute, 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Marleen Peumans
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Bart Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium.
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Ajcharanukul O, Santikulluk P, Sasingha P, Sabpawat S, Sukyanan K. Iontophoresis effects of two-step self-etch and total-etch systems on dentin permeability and sealing of composite restoration under simulated pulpal pressure. BMC Oral Health 2022; 22:574. [PMID: 36482395 PMCID: PMC9730621 DOI: 10.1186/s12903-022-02632-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 11/29/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Studies demonstrated the bond strength enhancement and the decrease in degradation of the adhesive interface after applying either self-etch adhesives or two-step, etch-and-rinse adhesives under an electric field. However, the presence of dentinal fluid driven by the pulpal pressure in vivo is a profounding factor affecting both the sealing ability and bond strength of adhesives. This study aimed to evaluate the effect of three-step etch-and-rinse and two-step self-etch adhesives when applied with iontophoresis under simulated pulpal pressure on the permeability of dentin, resin infiltration, and the sealing ability of resin composite. METHODS The experiments were done on 32 recently extracted premolars, randomly assigned into four groups (n = 8) according to two adhesive systems (SBMP and SE), applied following the manufacturer's instructions (control) for two groups or with iontophoresis for the others (SBMPi and SEi). For the iontophoresis, the anodal current was applied at 75 μA for 20 s through the cavity electrode during the bond. The fluid flow rate of dentin was recorded after cavity preparation (smear-layer-covered dentin; T1), bonding (T2), and composite restoration (T3) during the maintained pulpal pressure of 20 mm Hg. The flow rates were expressed as a percentage relative to the initial smear-layer-covered value for each specimen. Results were analyzed using repeated measures ANOVA. Scanning electron microscopy (SEM) was performed to observe the resin/dentin interface. RESULTS There were no significant increases in the mean flow rates from T1 to T3 in the SBMP (P = 0.355), while these changes in the SE were significant between T1 (100%) and T2 (166.77%) and T1 and T3 (221.16%) (P = 0.002; one-way RM ANOVA; Holm-Sidak test). For the iontophoresis groups, the mean flow rates decreased significantly from T1 to T2 and T1 to T3 of both SBMPi (T2 = 86.43, and T3 = 79.53; P < 0.001) and SEi groups (T2 = 87.96, and T3 = 81.48; P = 0.004). The iontophoresis of both adhesives produced the optimal resin infiltration with improved quality of the hybrid layer and resin tags. CONCLUSIONS SBMP bonded with or without iontophoresis performed better sealing ability than SE under the same condition. Both adhesives applied with anodal iontophoresis significantly decreased the dentin permeability, contributing to the improved resin infiltration.
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Affiliation(s)
- Orapin Ajcharanukul
- grid.412739.a0000 0000 9006 7188Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Asokemontri Road, Wattana, Bangkok, 10110 Thailand
| | - Peeraya Santikulluk
- grid.412739.a0000 0000 9006 7188Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Asokemontri Road, Wattana, Bangkok, 10110 Thailand
| | - Palat Sasingha
- grid.412739.a0000 0000 9006 7188Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Asokemontri Road, Wattana, Bangkok, 10110 Thailand
| | - Sirithorn Sabpawat
- grid.412739.a0000 0000 9006 7188Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Asokemontri Road, Wattana, Bangkok, 10110 Thailand
| | - Kanokporn Sukyanan
- grid.412739.a0000 0000 9006 7188The Dean Office, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
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AL-Ashou WM, Taher R, Ali AH. Shear-bond strength of different Self-Etching adhesive systems to dentin with or without laser irradiation before photopolymerization (A comparative Study). Saudi Dent J 2022; 34:779-787. [PMID: 36570578 PMCID: PMC9767841 DOI: 10.1016/j.sdentj.2022.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/10/2022] [Accepted: 11/16/2022] [Indexed: 11/24/2022] Open
Abstract
This study aimed at comparing shear-bond strength (SBS) of different self-etching adhesive systems (Clearfil S3 Bond Plus, G-Premio BOND and IBond) to dentin without or with diode-laser irradiation before photo-polymerization and to determine the effect of storage and thermo-cycling on SBS of adhesive systems. METHODS The buccal surface of 84 extracted maxillary premolars was grounded to create flat surface. The specimens were allocated into 3 groups (n = 28) depending upon the adhesive systems, then each group was divided into two sub-group (I, II) (n = 14). After the placement of respective adhesive systems on the flat surface, adhesive system in group I was photo-polymerized immediately, while in group II, the adhesive systems were exposed to diode-laser before photo-polymerization. Composite cylinder (4 mm in diameter and 2 mm height) was built on the flat surface of each specimen. Then group I and II were divided into two sub-groups (n = 7) according to the storage time and thermo-cycling (1 day without thermo-cycling or 72 days with thermo-cycling) then all the specimens were stored in distilled water. The SBS was measured at the end of storage period. ANOVA, Duncan's Multiple Range Test and independent t-test "P ≤ 0.05" were used for data analysis. RESULTS G-premio BOND showed the highest mean value of SBS followed by Clearfil S3 Bond plus without significant difference between them, while IBond revealed the least mean value. Laser irradiation had positive effect on the bond-strength of all tested adhesive systems. The results also showed that the storage with thermo-cycling had negative effect on the bond-strength in groups without laser irradiation for all tested adhesive systems, while for groups with laser irradiation, the reduction in the bond-strength of all tested adhesive systems was not significant. CONCLUSION Diode-laser application prior to photo-polymerization of self-etch adhesive systems significantly increased the bond-strength to dentin and can increase the durability of composite adhesion.
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In Search of Novel Degradation-Resistant Monomers for Adhesive Dentistry: A Systematic Review and Meta-Analysis. Biomedicines 2022; 10:biomedicines10123104. [PMID: 36551861 PMCID: PMC9775292 DOI: 10.3390/biomedicines10123104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/25/2022] [Accepted: 11/26/2022] [Indexed: 12/05/2022] Open
Abstract
This study aimed to assess whether degradation-resistant monomers included in experimental dental adhesives can improve long-term bond strength compared to conventional monomers. This study followed the latest PRISMA guidance (2020). The search for the systematic review was carried out in four electronic databases: PubMed/Medline, Scopus, SciELO and EMBASE, without restrictions on the year of publication and language. The last screening was conducted in July 2022. Interventions included were in vitro studies on experimental dental adhesives that tested short-term and long-term bond strength, but also water sorption and solubility data when available, in extracted human molars. Meta-analyses were performed using Rstudio v1.4.1106. A summary table analyzing the individual risk of bias was generated using the recent RoBDEMAT tool. Of the 177 potentially eligible studies, a total of 7 studies were included. Experimental monomers with acrylamides or methacrylamide−acrylamide hybrids in their composition showed better results of aged bond strength when compared to methacrylate controls (p < 0.05). The experimental monomers found better sorption and solubility compared to controls and were significantly different (p < 0.001). It is possible to achieve hydrolytically resistant formulations by adding novel experimental monomers, with chemical structures that bring benefit to degradation mechanisms.
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Mancuso E, Mazzitelli C, Maravic T, Pitta J, Mengozzi A, Comba A, Baldi A, Scotti N, Mazzoni A, Fehmer V, Sailer I, Breschi L. The influence of finishing lines and margin location on enamel and dentin removal for indirect partial restorations: A micro-CT quantitative evaluation. J Dent 2022; 127:104334. [PMID: 36257512 DOI: 10.1016/j.jdent.2022.104334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES This in vitro research aimed to quantitatively evaluate the enamel and dentin tissue removal and the residual adhesion surface area (RAS) after different margin designs and locations for indirect partial restorations (IPR). METHODS A human molar was scanned using a Micro-CT and the STL file obtained was used to 3D-print 50 resin-tooth replicas. IPR standardized preparations were performed. The specimens were randomly assigned to 5 groups (n = 10), according to preparation and margin location to the dental equator (DE): 1) Rounded shoulder above the DE (SA); 2) Hollow chamfer above the DE (CA); 3) Butt joint above the DE (BJ); 4) Rounded shoulder below the DE (SB); 5) Chamfer below the DE (CB). Then, the tooth replicas were scanned and each STL file was aligned and superimposed to the original STL model file. Data of enamel and dentin volume removal and RAS were assessed and statistically analyzed (one-way ANOVA and Kruskal-Wallis tests for the two dental substrates respectively). Significance was set at p<0.05. RESULTS Differences in dental tissue reductions were related to the margin location. Above the equator, SA, CA, and BJ performed comparably (p>0.05). Below the equator, CB was significantly more conservative in enamel reduction than SB (p<0.05) and showed the highest enamel adhesive surface exposure among the tested preparations (p<0.05). CONCLUSIONS When the preparation margin is placed above DE, BJ determines a greater exposure of dentin, reducing the adhesive surface in enamel. Below DE, SB seems to be more aggressive in terms of tissue removal compared to CB. CLINICAL SIGNIFICANCE The results of this in vitro study suggest that in teeth requiring partial restoration with the margin below the dental equator, a chamfer preparation would be more conservative than a shoulder preparation. When above the equator, preparations with flat designs would expose more dentine providing a worse substrate for adhesion.
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Affiliation(s)
- Edoardo Mancuso
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy
| | - Tatjana Maravic
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy
| | - João Pitta
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Alessandro Mengozzi
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy
| | - Allegra Comba
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, Via Nizza 230, 10126 Turin, Italy
| | - Andrea Baldi
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, Via Nizza 230, 10126 Turin, Italy
| | - Nicola Scotti
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, Via Nizza 230, 10126 Turin, Italy
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy
| | - Vincent Fehmer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Science (DIBINEM), Alma Mater University of Bologna, via S. Vitale 59, 40125 Bologna, Italy.
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Yaghmoor RB, Jamal H, Abed H, Allan E, Ashley P, Young A. Incorporation of MMP inhibitors into dental adhesive systems and bond strength of coronal composite restorations: A systematic review and meta-analysis of in vitro studies. JAPANESE DENTAL SCIENCE REVIEW 2022; 58:298-315. [PMID: 36247748 PMCID: PMC9557023 DOI: 10.1016/j.jdsr.2022.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 08/31/2022] [Accepted: 09/22/2022] [Indexed: 10/31/2022] Open
Abstract
Purpose To systematically review in vitro studies that incorporated MMP inhibitors into adhesive systems in terms of the effect on immediate and aged bond strength of dental composite to dentine. Materials and methods Independently, two reviewers conducted an electronic search in three databases (MEDLINE, EMBASE, and Google Scholar) following the Preferred Reporting Items for Systematic Review and Meta-Analyses Protocols (PRISMA-P), up to 6 March 2022. Results The search resulted in 894 papers, 33 of which were eligible to be included in the review; of those, 13 fulfilled the meta-analysis eligibility criteria. Nineteen inhibitors were used among the studies, and those included in the meta-analysis were 2%, 0.2% chlorhexidine (CHX), 5 µM GM1489, and 0.5%, 1% benzalkonium chloride (BAC). In the meta-analysis, while above inhibitors showed no adverse effect on bond strength, 0.2% CHX and 5 µM GM1489 caused a significant increase in immediate and 12-months bond strength. All other inhibitors resulted in a significant increase in bond strength at six months of ageing. Conclusions Incorporation of MMP inhibitors into the adhesive system has no unfavourable effect on immediate bond strength but a favourable effect on longer-term bond strength. Additionally, inhibitors other than CHX could have similar or better effects on bond strength.
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Affiliation(s)
- Rayan B. Yaghmoor
- Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah 24381, Saudi Arabia
- Department of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, Royal Free Hospital London, NW3 2PF, UK
- Department of Microbial Diseases, UCL Eastman Dental Institute, Royal Free Hospital, London NW3 2PF, UK
- Corresponding author at: Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah 24381, Saudi Arabia.
| | - Hasan Jamal
- Unit of Paediatric Dentistry, UCL Eastman Dental Institute, London WC1E 6DE, UK
| | - Hassan Abed
- Department of Basic and Clinical Oral Sciences, Umm Al-Qura University, Faculty of Dentistry, Makkah 24381, Saudi Arabia
| | - Elaine Allan
- Department of Microbial Diseases, UCL Eastman Dental Institute, Royal Free Hospital, London NW3 2PF, UK
| | - Paul Ashley
- Unit of Paediatric Dentistry, UCL Eastman Dental Institute, London WC1E 6DE, UK
| | - Anne Young
- Department of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, Royal Free Hospital London, NW3 2PF, UK
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Agarwal M, Dinesh K, Mathew S, Ramesh P, Shetty NK, Narayana IH. Evaluation of the effect of remineralization with strontium-doped nanohydroxyapatite with noncollagenous protein analog: Chitosan on the shear bond strength of resin composite to dentin - An in vitro study. J Conserv Dent 2022; 25:648-653. [PMID: 36591584 PMCID: PMC9795681 DOI: 10.4103/jcd.jcd_285_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/07/2022] [Accepted: 07/14/2022] [Indexed: 11/06/2022] Open
Abstract
Context The resin-dentin interface is less durable, which reduces the longevity of tooth-colored restorations. To encounter this shortcoming, the use of nanotechnology to mimic biomineralization proves beneficial. Aims This study was conducted to evaluate the effect of remineralization with strontium-doped nanohydroxyapatite (Sr-nHAp) with chitosan on shear bond strength of resin composite to dentin. Materials and Methods Sixty five extracted human premolars were divided into five groups (n = 13) based on remineralization protocol as: Group A - 20% (Sr-nHAp) with chitosan, Group B - 10% (Sr-nHAp) with chitosan, Group C - 20% (Sr-nHAp) with simulated body fluid, Group D - 10% (Sr-nHAp) with simulated body fluid, and Group E - control. Following bonding, resin composite of specified dimension was built and was subjected to shear bond strength test after 24 h and 1 week using Universal Testing Machine, and mode of failure was assessed. ANOVA and paired sample t-test were used for analyzing the data, and the level of significance was set at 5%. Results The highest value of shear bond strength was obtained from Group A after aging for a week, and there is a significant increase in the value of all the groups as compared to the control group after 1 week of storage than 24 h. Conclusions Remineralization with Sr-nHAp and chitosan has positively improved the bond strength of resin to dentin at the end of 1 week.
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Affiliation(s)
- Manila Agarwal
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
| | - K. Dinesh
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
| | - Sylvia Mathew
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
| | - Poornima Ramesh
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
| | - Nithin Kumar Shetty
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
| | - Indiresha H. Narayana
- Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India
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You X, Chen L, Xu J, Li S, Zhang Z, Guo L. Effects of carbodiimide combined with ethanol-wet bonding pretreatment on dentin bonding properties: an in vitro study. PeerJ 2022; 10:e14238. [PMID: 36299505 PMCID: PMC9590415 DOI: 10.7717/peerj.14238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/23/2022] [Indexed: 01/24/2023] Open
Abstract
Purpose This study evaluated the combined effects of Carbodiimide (EDC) and ethanol-wet bonding (EWB) pretreatment on the bond strength and resin-dentin surface. Methods Phosphoric acid-etched dentin specimens were randomly divided into five groups based on the following pretreatments: deionized water (control), EWB, 0.3M EDC in water (EDCw), EDC water solution combined EWB (EDCw + EWB), and 0.3M EDC in ethanol (EDCe). A scanning electron microscope (SEM) was used to observe the morphology of collagen fibrils on the demineralized dentin matrix in each group after pretreatment. The adhesives Prime & Bond NT (PB) (Dentsply De trey, Konstanz, Germany) or Single bond 2 (SB) (3M ESPE, St. Paul, MN, USA) was applied after pretreatments, and a confocal laser scanning microscope (CLSM) was used to evaluate the quality of resin tags. The degree of conversion (DC) of the adhesive was investigated by Fourier transform infrared spectroscopy (ATR-FTIR). The dentin was first bonded with resin and bathed in water at 37 °C for 24 h. Half of them were subjected to 10, 000 cycles in a thermocycler between 5 °C and 55 °C before a microshear bond strength (µSBS) test. The statistical methods were Analysis of Variance (ANOVA) and a Tukey post hoc test at α = 0.05. Results The µSBS was significantly affected by pretreatments (p < 0.001), adhesives (p < 0.001), and aging conditions (p < 0.001) as revealed by the three-way ANOVA. The EDCw, EDCw + EWB, and EDCe groups significantly increased the µSBS; the EDCw + EWB and EDCe groups produced the highest µSBS. In the EDC-containing groups, the SEM showed at the collagen fibrils in the dentin matrix formed a three-dimensional network structure in the tubules after cross-linking into sheets, and the hybrid layer formed thicker resin tags under a CLSM. In the EDC-containing groups, the CLSM observed an increase in the length of resin tags. PB showed a higher DC and bonding strength than SB, and the five pretreatment groups tested did not affect the DC of the two adhesives. Conclusions In etch-and-rinse bonding system, EDC combined with EWB pretreatment can improve the quality of the hybrid layer and enhance the mechanical properties of demineralized dentin matrix. Pretreatment with EDC-ethanol solution may be a new clinically friendly option for enhancing dentin bonding durability.
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Affiliation(s)
- Xiaoxiao You
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
| | - Long Chen
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
| | - Jie Xu
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
| | - Sihui Li
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
| | - Zhenghao Zhang
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
| | - Ling Guo
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, China
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Zanigni L, Checchi V, Davide Pugliese B, Josic U, Mazzitelli C, Giannetti L, Breschi L, Nucci C. Effect of Orthophosphoric Acid and Er:YAG Laser Etching on Micro-shear Bond Strength to Enamel: An In Vitro Pilot Study. Open Dent J 2022. [DOI: 10.2174/18742106-v16-e2208012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
Dental conditioning is one of the most important phases during enamel bonding procedures to obtain clean surfaces, smear layer removal with collagen active sites and hydroxyapatite exposure.
Objective:
The aim of this study was to compare the micro-shear bond strength (µSBS) of different adhesive systems after two different etching techniques: 37% orthophosphoric acid (H3PO4) and Er:YAG laser.
Methods:
Ninety permanent extracted molars were embedded into epoxy resin blocks and sectioned longitudinally. Specimens were randomly assigned to one of the following groups (n=30), depending on the etching protocol: 37% H3PO4 for 30 s (Group 1), Er:YAG laser 100mJ-10Hz (Group 2), and Er:YAG laser 100mJ-10Hz followed by 37% H3PO4 for 30 s (Group 3). Each group was further divided into two subgroups depending on the bonding agent used on enamel (n=15): A) EE-Bond (Tokuyama) and B) Peak universal (Ultradent). A two-way analysis of variance (two-way ANOVA) was conducted and the level of significance was set to p=0.05.
Results:
The etching procedure was a significant factor influencing the results (p=0.006), while no differences were observed for the two adhesive systems tested (p>0.05). Group 3 recorded the highest bond strength values, according to the following sequel: Group 3 < Group 2 < Group 1 < 0.05.
Conclusion:
The combination of phosphoric acid etching with Er:YAG laser provided the most favourable bond strength to enamel. Further morphological studies are currently ongoing.
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Biodegradation of Dental Resin-Based Composite—A Potential Factor Affecting the Bonding Effect: A Narrative Review. Biomedicines 2022; 10:biomedicines10092313. [PMID: 36140414 PMCID: PMC9496159 DOI: 10.3390/biomedicines10092313] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/04/2022] [Accepted: 09/15/2022] [Indexed: 12/02/2022] Open
Abstract
In recent years, although resin composite has played an important role in the restoration of tooth defects, it still has several disadvantages, including being biodegraded by saliva, bacteria and other enzymes in the oral cavity, which may result in repair failure. This factor is not conducive to the long-term survival of the prosthesis in the mouth. In this article, we review the causes, influencing factors and prevention methods of resin biodegradation. Biodegradation is mainly caused by esterase in saliva and bacteria, which breaks the ester bond in resin and causes the release of monomers. The mechanical properties of the prosthesis can then be affected. Meanwhile, cathepsin and MMPs are activated on the bonding surface, which may decompose the dentin collagen. In addition, neutrophils and residual water on the bonding surface can also aggravate biodegradation. Currently, the primary methods to prevent biodegradation involve adding antibacterial agents to resin, inhibiting the activity of MMPs and enhancing the crosslinking of collagen fibers. All of the above indicates that in the preparation and adhesion of resin materials, attention should be paid to the influence of biodegradation to improve the prosthesis’s service life in the complex environment of the oral cavity.
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Zhao Y, He X, Wang H, Wang H, Shi Z, Zhu S, Cui Z. Polyphenol-Enriched Extract of Lacquer Sap Used as a Dentine Primer with Benefits of Improving Collagen Cross-Linking and Antibacterial Functions. ACS Biomater Sci Eng 2022; 8:3741-3753. [PMID: 35793160 PMCID: PMC9472228 DOI: 10.1021/acsbiomaterials.1c01287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Commercial dentin adhesive systems are applied to restorations due to their resistant bonding properties, but they suffer from the lack of bioactivity and are prone to hydrolysis. Therefore, to overcome these limitations, an eco-friendly natural monomer, urushiol, was adopted to be a primer in dentin bonding due to its interaction with collagen and antibacterial activity, preventing further hydrolysis development. First, urushiol was determined to be capable of improving the biological stability of dentin collagen through cross-linking. Using high-fidelity analytical chemistry techniques, such as Fourier transform infrared spectroscopy, we quantified the effects of urushiol on collagen molecules. It could also effectively decrease weight loss after collagenase ingestion by improving the stability of dentin. Moreover, urushiol inhibited Streptococcus mutans growth as well as its biofilm formation. Finally, we demonstrated that the urushiol primer could improve the bonding strength, particularly after aging. The cross-linking and antibacterial functions of urushiol have provided promising developmental prospects for biomaterials in dentin adhesion.
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Affiliation(s)
- Ying Zhao
- Department
of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China
| | - Xi He
- Department
of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China
| | - Han Wang
- Department
of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China
| | - Huimin Wang
- Department
of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China
| | - Zuosen Shi
- State
Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130021, P. R.
China
| | - Song Zhu
- Department
of Prosthetic Dentistry, School and Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China
| | - Zhanchen Cui
- State
Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130021, P. R.
China
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