1
|
Degradation and Stabilization of Resin-Dentine Interfaces in Polymeric Dental Adhesives: An Updated Review. COATINGS 2022. [DOI: 10.3390/coatings12081094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Instability of the dentine-resin interface is owed to the partial/incomplete penetration of the resin adhesives in the collagen fibrils. However, interfacial hydrolysis of the resin-matrix hybrid layer complex activates the collagenolytic and esterase enzymes that cause the degradation of the hybrid layer. Adequate hybridization is often prevented due to the water trapped between the interfibrillar spaces of the collagen network. Cyclic fatigue rupture and denaturation of the exposed collagen fibrils have been observed on repeated application of masticatory forces. To prevent interfacial microstructure, various approaches have been explored. Techniques that stabilize the resin–dentine bond have utilized endogenous proteases inhibitors, cross linking agents’ incorporation in the exposed collagen fibrils, an adhesive system free of water, and methods to increase the monomer penetration into the adhesives interface. Therefore, it is important to discover and analyze the causes of interfacial degradation and discover methods to stabilize the hybrid layer to execute new technique and materials. To achieve a predictable and durable adhesive resin, restoration is a solution to the many clinical problems arising due to microleakage, loss of integrity of the restoration, secondary caries, and postoperative sensitivity. To enhance the longevity of the resin-dentine bond strength, several experimental strategies have been carried out to improve the resistance to enzymatic degradation by inhibiting intrinsic collagenolytic activity. In addition, biomimetic remineralization research has advanced considerably to contemporary approaches of both intrafibrillar and extrafibrillar remineralization of dental hard tissues. Thus, in the presence of biomimetic analog complete remineralization of collagen, fibers are identified.
Collapse
|
2
|
Toledano M, Toledano-Osorio M, Hannig M, Carrasco-Carmona Á, Osorio MT, García-Godoy F, Cabello I, Osorio R. Zn-containing Adhesives Facilitate Collagen Protection and Remineralization at the Resin-Dentin Interface: A Narrative Review. Polymers (Basel) 2022; 14:polym14030642. [PMID: 35160631 PMCID: PMC8840460 DOI: 10.3390/polym14030642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/29/2022] Open
Abstract
This is a narrative review of the literature assessing the potential effectiveness of doping dentin polymeric adhesives with zinc compounds in order to improve bonding efficacy, remineralization and protection against degradation. A literature search was conducted using electronic databases, such as PubMed, MEDLINE, DIMDI and Web of Science. Through our search, we found literature demonstrating that Zn-doped dentin adhesives promote protection and remineralization of the resin-dentin interfaces. The increased bioactivity has also facilitated dentinal tubules' occlusion by crystals' precipitation contributing to improved sealing efficacy of restorations. Loading dentin adhesives with zinc gives rise to an increase of both crystallinity of mineral and crosslinking of collagen. The main role of zinc, in dentin adhesives, is to inhibit collagen proteolysis. We concluded that zinc exerts a protective effect through binding at the collagen-sensitive cleavage sites of matrix-metalloproteinases (MMPs), contributing to dentin matrix stabilization. Zinc may not only act as a MMPs inhibitor, but also influence signaling pathways and stimulate metabolic effects in dentin mineralization and remineralization processes. Zn-doped adhesives increase the longevity of dentin bonding through MMPs inhibition. Zn poses a remineralization strategy in demineralized dentin.
Collapse
Affiliation(s)
- Manuel Toledano
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
| | - Manuel Toledano-Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
- Correspondence: ; Tel.: +34-958-243-789
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, 66421 Homburg/Saar, Germany;
| | - Álvaro Carrasco-Carmona
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
| | | | - Franklin García-Godoy
- Health Science Center, College of Dentistry, University of Tennessee, 875 Union Avenue, Memphis, TN 381632110, USA;
| | - Inmaculada Cabello
- Integral Pediatric Dentistry Teaching Unit, Faculty of Medicine, University of Murcia, 30008 Murcia, Spain;
- Murcian Institute of Biosanitary Research (IMIB), 30120 Murcia, Spain
| | - Raquel Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
| |
Collapse
|
3
|
Beck F, Ilie N. Riboflavin and Its Effect on Dentin Bond Strength: Considerations for Clinical Applicability-An In Vitro Study. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 9:bioengineering9010034. [PMID: 35049743 PMCID: PMC8772893 DOI: 10.3390/bioengineering9010034] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/10/2022] [Accepted: 01/10/2022] [Indexed: 11/30/2022]
Abstract
Bioactive collagen crosslinkers propose to render the dentin hybrid layer less perceptive to hydrolytic challenge. This study aims to evaluate whether bond strength of dental resin composite to dentin benefits from riboflavin (RB)-sensitized crosslinking when used in a clinically applicable protocol. A total of 300 human dentin specimens were prepared consistent with the requirements for a macro-shear bond test. RB was applied on dentin, either incorporated in the primer (RBp) of a two-step self-etch adhesive or as an aqueous solution (RBs) before applying the adhesive, and blue light from a commercial polymerization device was used for RB photoactivation. Bonding protocol executed according to the manufacturer’s information served as control. Groups (n = 20) were tested after 1 week, 1 month, 3 months, 6 months or 1 year immersion times (37 °C, distilled water). The different application methods of RB significantly influenced bond strength (p < 0.001) with a medium impact (η2p = 0.119). After 1 year immersion, post hoc analysis identified a significant advantage for RB groups compared to RBp (p = 0.018), which is attributed to a pH-/solvent-dependent efficiency of RB-sensitized crosslinking, stressing the importance of formulation adjustments. We developed an application protocol for RB-sensitized crosslinking with emphasis on clinical applicability to test its performance against a gold-standard adhesive, and are confident that, with a few adjustments to the application solution, RB-sensitized crosslinking can improve the longevity of adhesive restorations in clinics.
Collapse
|
4
|
Paken G, Çömlekoğlu ME, Sonugelen M. Detection of the hybrid layer biodegradation initiation factor with a scanning electron microscope. Microsc Res Tech 2021; 84:2166-2175. [PMID: 33931911 DOI: 10.1002/jemt.23771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/28/2021] [Accepted: 03/25/2021] [Indexed: 11/08/2022]
Abstract
The purpose of this study was to elucidate the origin of initiation of hybrid layer biodegradation. Ninety caries-free human third molars were divided into three surface groups: enamel, dentin, and NaOCl-treated dentin. (n = 30/group) Each group was divided into three subgroups (n = 10/group) of luting resin materials with etch-and-rinse; self-etch and self-adhesive systems. Resin composite blocks and sticks were fabricated and adhered onto dentin and enamel surfaces. The bond strength values were evaluated with micro shear test and statistical analysis were made. On the other hand, teeth were sectioned with a slow-speed saw into multiple beams. After thermocycling, samples were kept in 50% silver nitrate solution. Samples were analyzed with SEM in back-scattered mode. According to the micro-shear bond tests, higher bond strength values were observed in etch-and-rinse system. Bond strength values in self-adhesive and etch-and-rinse groups were significantly higher than self-etch groups in dentin surface and dentin surface treatment with NaOCl. Back-scattered scanning electron microscope results showed that, different degradation mechanism was observed. The present study indicates that, due to the acid etching in dentin, collagen biodegradation was observed within the hybrid layer. On the enamel surfaces, resin degradation was related with resin monomers in adhesive systems.
Collapse
Affiliation(s)
- Gamze Paken
- Department of Prosthodontics, School of Dentistry, Usak University, Usak, Turkey
| | | | - Mehmet Sonugelen
- Department of Prosthodontics, School of Dentistry, Ege University, Izmir, Turkey
| |
Collapse
|
5
|
Anshida VP, Kumari RA, Murthy CS, Samuel A. Extracellular matrix degradation by host matrix metalloproteinases in restorative dentistry and endodontics: An overview. J Oral Maxillofac Pathol 2021; 24:352-360. [PMID: 33456247 PMCID: PMC7802866 DOI: 10.4103/jomfp.jomfp_34_20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/29/2020] [Accepted: 05/23/2020] [Indexed: 11/04/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are a group of over 25 secreted and membrane-bound enzymes responsible for pericellular substrate degeneration. In response to injury, they play key roles in morphogenesis, wound healing, tissue repair and remodeling. They have been isolated from dentin, odontoblasts, pulp and periapical tissue. They play a major role in the formation of dentin matrix and secondary and tertiary dentin. These are also responsible for releasing dentinal growth factors. MMP family proteins elicit a dual role in the pathogenesis of inflammation, stimulating protective innate and/or adaptive immune functions, as well as tissue destruction. The main organic component of tooth structure is collagen, and MMPs that degrade collagen and the extracellular matrix have been implicated in the progression of dental caries, dental erosion as well as degradation of the hybrid layer. MMPs have also been shown to be active in pulpitis, and studies have shown that they can be used as diagnostic markers of pulpal and periapical inflammation. This review describes the role of MMPs in dental caries, dental erosion, bond stability as well as in pulpal and periapical inflammation.
Collapse
Affiliation(s)
- V P Anshida
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - R Anitha Kumari
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - Chethana S Murthy
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - Anoop Samuel
- Department of Conservative Dentistry and Endodontics, Noorul Islam College of Dental Sciences, Thiruvananthapuram, Kerala, India
| |
Collapse
|
6
|
Ahrari F, Moosavi H, Zanjani M. Effect of Er:YAG laser radiation on pull-out fracture load of esthetic posts luted to root canal dentin with various resin cements. Dent Res J (Isfahan) 2021. [DOI: 10.4103/1735-3327.311424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
7
|
Huang X, Xie J, Lan Y, Sun Z, Zhang M, Guo L. The effects of 45S5 bioactive glass and Er:YAG Laser on the microtensile bond strength of fluorosed teeth. Microsc Res Tech 2020; 83:1558-1565. [PMID: 33220004 DOI: 10.1002/jemt.23550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 06/08/2020] [Accepted: 06/30/2020] [Indexed: 11/07/2022]
Abstract
This vitro study aimed to evaluate the effects of 45S5 bioactive glass (BAG) and Er:YAG laser as desensitization treatments on the microtensile bond strength (MTBS) of fluorosed teeth. The 120 noncarious fluorosis were to obtain superficial dentin, being classified into four groups according to the Thylstrup and Fejerskov Index (TFI). Specimens from each group were randomly divided into five subgroups. After fluorosed teeth hypersensitivity models were established, the following pretreatments were applied on dentine surface: Subgroup 1: deionized water (Control); Subgroup 2: BAG; Subgroup 3: Er:YAG laser; Subgroup 4: BAG + Er:YAG laser, and Subgroup 5: Er:YAG laser + BAG. One sample was randomly selected from each subgroup for scanning electron microscope (SEM). The remaining samples were bonded with composite resin by Adper Single Bond 2 adhesive. Then water bath at 37°C for 24 hr. After 5,000 thermocycling, MTBS was tested and fracture mode was analyzed. The difference of MTBS between BAG group and Control group was found statistically significant (p < .05) in fluorosis. The Er:YAG laser + BAG group showed lowest MTBS values in fluorosis. In conclusion, the pretreatment of BAG might be beneficial to the adhesive of fluorosed teeth. Er:YAG laser desensitization alone or using BAG first and then Er:YAG laser desensitization might not affect the adhesive of fluorosed teeth, while Er:YAG laser desensitization followed by the pretreatment of BAG would be not conducive to the adhesive of fluorosed teeth.
Collapse
Affiliation(s)
- Xiaoyu Huang
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Jing Xie
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Yuyan Lan
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Zhengfan Sun
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Meifeng Zhang
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| | - Ling Guo
- Department of Prosthodontics, Hospital of Stomatology Affiliated to Southwest Medical University, Luzhou, Sichuan, China
| |
Collapse
|
8
|
Lovász BV, Lempel E, Szalma J, Sétáló G, Vecsernyés M, Berta G. Influence of TEGDMA monomer on MMP-2, MMP-8, and MMP-9 production and collagenase activity in pulp cells. Clin Oral Investig 2020; 25:2269-2279. [PMID: 32845470 PMCID: PMC7966645 DOI: 10.1007/s00784-020-03545-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 08/20/2020] [Indexed: 01/06/2023]
Abstract
Objectives Resin-based composites may leach monomers such as triethylene-glycol dimethacrylate (TEGDMA), which could contribute to intrapulpal inflammation. The aim of this investigation was to examine whether various concentrations of TEGDMA are able to influence dentally relevant Matrix metalloproteinase (MMP)-2, MMP-8, and MMP-9 production, total collagenase/gelatinase activity in pulp cells, and suggest possible signaling mechanisms. Materials and methods Pulp cells were cultured, followed by a 1-day exposure to sublethal TEGDMA concentrations (0.1, 0.2, and 0.75 mM). Total MMP activity was measured by an EnzCheck total collagenase/gelatinase assay, while the production of specific MMPs and the relative changes of phosphorylated, i.e., activated signaling protein levels of extracellular signal-regulated kinase (ERK)1/2, p38, c-Jun N-terminal kinase (JNK) were identified by western blot. Immunocytochemistry image data was also plotted and analyzed to see whether TEGDMA could possibly alter MMP production. Results An increase in activated MMP-2, MMP-8, and MMP-9 production as well as total collagenase activity was seen after a 24-h exposure to the abovementioned TEGDMA concentrations. Increase was most substantial at 0.1 (P = 0.002) and 0.2 mM (P = 0.0381). Concurrent p-ERK, p-p38, and p-JNK elevations were also detected. Conclusions Results suggest that monomers such as TEGDMA, leached from resin-based restorative materials, activate and induce the production of dentally relevant MMPs in pulp cells. Activation of ERK1/2, p38, or JNK and MMP increase may play a role in and/or can be part of a broader stress response. Clinical relevance Induction of MMP production and activity may further be components in the mechanisms of intrapulpal monomer toxicity.
Collapse
Affiliation(s)
- Bálint Viktor Lovász
- Department of Oral and Maxillofacial Surgery, University of Pécs Medical School, 5 Dischka Gy. St, Pécs, 7621, Hungary.
| | - Edina Lempel
- Department of Conservative Dentistry and Periodontology, University of Pécs Medical School, 5 Dischka Gy. St, Pécs, 7621, Hungary
| | - József Szalma
- Department of Oral and Maxillofacial Surgery, University of Pécs Medical School, 5 Dischka Gy. St, Pécs, 7621, Hungary
| | - György Sétáló
- Department of Medical Biology and Central Electron Microscope Laboratory, University of Pécs Medical School, 12 Szigeti St, Pécs, 7624, Hungary
| | - Mónika Vecsernyés
- Department of Medical Biology and Central Electron Microscope Laboratory, University of Pécs Medical School, 12 Szigeti St, Pécs, 7624, Hungary
| | - Gergely Berta
- Department of Medical Biology and Central Electron Microscope Laboratory, University of Pécs Medical School, 12 Szigeti St, Pécs, 7624, Hungary
| |
Collapse
|
9
|
de Moraes IQS, do Nascimento TG, da Silva AT, de Lira LMSS, Parolia A, Porto ICCDM. Inhibition of matrix metalloproteinases: a troubleshooting for dentin adhesion. Restor Dent Endod 2020; 45:e31. [PMID: 32839712 PMCID: PMC7431940 DOI: 10.5395/rde.2020.45.e31] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 02/17/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023] Open
Abstract
Matrix metalloproteinases (MMPs) are enzymes that can degrade collagen in hybrid layer and reduce the longevity of adhesive restorations. As scientific understanding of the MMPs has advanced, useful strategies focusing on preventing these enzymes' actions by MMP inhibitors have quickly developed in many medical fields. However, in restorative dentistry, it is still not well established. This paper is an overview of the strategies to inhibit MMPs that can achieve a long-lasting material-tooth adhesion. Literature search was performed comprehensively using the electronic databases: PubMed, ScienceDirect and Scopus including articles from May 2007 to December 2019 and the main search terms were “matrix metalloproteinases”, “collagen”, and “dentin” and “hybrid layer”. MMPs typical structure consists of several distinct domains. MMP inhibitors can be divided into 2 main groups: synthetic (synthetic-peptides, non-peptide molecules and compounds, tetracyclines, metallic ions, and others) and natural bioactive inhibitors mainly flavonoids. Selective inhibitors of MMPs promise to be the future for specific targeting of preventing dentin proteolysis. The knowledge about MMPs functionality should be considered to synthesize drugs capable to efficiently and selectively block MMPs chemical routes targeting their inactivation in order to overcome the current limitations of the therapeutic use of MMPs inhibitors, i.e., easy clinical application and long-lasting effect.
Collapse
Affiliation(s)
- Izadora Quintela Souza de Moraes
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Ticiano Gomes do Nascimento
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Antonio Thomás da Silva
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Lilian Maria Santos Silva de Lira
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Abhishek Parolia
- Division of Clinical Dentistry, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Isabel Cristina Celerino de Moraes Porto
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil.,Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| |
Collapse
|
10
|
França CM, Tahayeri A, Rodrigues NS, Ferdosian S, Puppin Rontani RM, Sereda G, Ferracane JL, Bertassoni LE. The tooth on-a-chip: a microphysiologic model system mimicking the biologic interface of the tooth with biomaterials. LAB ON A CHIP 2020; 20:405-413. [PMID: 31854401 PMCID: PMC7395925 DOI: 10.1039/c9lc00915a] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The tooth has a unique configuration with respect to biomaterials that are used for its treatment. Cells inside of the dental pulp interface indirectly with biomaterials via a calcified permeable membrane, formed by the dentin matrix and several thousands of dentinal tubules (∼2 μm in diameter). Although the cytotoxic response of the dental pulp to biomaterials has been extensively studied, there is a shortage of in vitro model systems that mimic the dentin-pulp interface and enable an improved understanding of the morphologic, metabolic and functional influence of biomaterials on live dental pulp cells. To address this shortage, here we developed an organ-on-a-chip model system which integrates cells cultured directly on a dentin wall within a microfluidic device that replicates some of the architecture and dynamics of the dentin-pulp interface. The tooth-on-a-chip is made out of molded polydimethylsiloxane (PDMS) with a design consisting of two chambers separated by a dentin fragment. To characterize pulp cell responses to dental materials on-chip, stem cells from the apical papilla (SCAPs) were cultured in odontogenic medium and seeded onto the dentin surface, and observed using live-cell microscopy. Next, to evaluate the tooth-on-a-chip as a platform for materials testing, standard dental materials used clinically (2-hydroxyethylmethacrylate - HEMA, phosphoric acid - PA, and Adper-Scotchbond - SB) were tested for cytotoxicity, cell morphology, and metabolic activity on-chip, and compared against standardized off-chip controls. All dental materials had cytotoxic effects in both on-chip and off-chip systems in the following order: HEMA > SB > PA (p < 0.05), and cells presented consistently higher metabolic activity on-chip than off-chip (p < 0.05). Furthermore, the tooth-on-a-chip enabled real-time tracking of gelatinolytic activity in a model hybrid layer (HL) formed in the microdevice, which suggests that dental pulp cells may contribute to the proteolytic activity in the HL more than endogenous proteases. In conclusion, the tooth-on-a-chip is a novel platform that replicates near-physiologic conditions of the pulp-dentin interface and enables live-cell imaging to study dental pulp cell response to biomaterials.
Collapse
Affiliation(s)
- Cristiane Miranda França
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Anthony Tahayeri
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Nara Sousa Rodrigues
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Shirin Ferdosian
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | | | - Grigoriy Sereda
- Department of Chemistry, University of South Dakota, Vermillion, SD, USA
| | - Jack L Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Luiz E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA. and Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA
| |
Collapse
|
11
|
Taso E, Stefanovic V, Gaudin A, Grujic J, Maldonado E, Petkovic-Curcin A, Vojvodic D, Sculean A, Rakic M. Effect of dental caries on periodontal inflammatory status: A split-mouth study. Arch Oral Biol 2019; 110:104620. [PMID: 31791000 DOI: 10.1016/j.archoralbio.2019.104620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 11/15/2019] [Accepted: 11/17/2019] [Indexed: 01/22/2023]
Abstract
OBJECTIVE This controlled split-mouth study aimed to estimate the effect of caries and related treatment on concentrations of interleukin (IL)-2, interferon (IFN)-γ, IL-12, IL-17A, IL-13, IL-10, IL-6, IL-5, IL-4, IL-22, tumor necrosis factor (TNF)-α, and IL1-β in gingival crevicular fluid (GCF) of caries affected teeth before (B), 7 (7D) and 30 (30D) days post-treatment and to compare them with concentrations from healthy teeth. DESIGN Study population included 81 systemically and periodontally healthy non-smokers exhibiting at least one shallow occlusal/ inter-proximal caries and one healthy tooth from the same morphologic group at the contralateral position. Following clinical exam, the GCF samples were collected baseline as well as 7D and 30D, while the biomarker measurement was performed using multiplex flowcytometry. RESULTS Caries affected teeth exhibited significantly higher levels of IFN-γ, IL-1β, IL-2, IL-4 and IL-6 when compared to healthy teeth. Post-treatment cytokines levels showed general trend of increase when compared to baseline, that was significant for IL-22 and IL-17 at 7D, while IFN-γ was significantly increased at 7D compared to the healthy teeth. At 30D, IFN-γ, TNF-α, IL-17 and IL-4 levels were significantly increased when compared to healthy teeth, while IL-2 levels were significantly higher than baseline levels. CONCLUSION Considering significantly increased periodontal levels of inflammatory markers in caries affected teeth and in response to performed treatment, it seems that dental caries and related restorative treatment might contribute to periodontal inflammation via additive effects already in early-stage caries.
Collapse
Affiliation(s)
- Ervin Taso
- Clinic for Stomatology, Military Medical Academy, Crnotravska 17, Belgrade, Serbia
| | - Vladimir Stefanovic
- Clinic for Stomatology, Military Medical Academy, Crnotravska 17, Belgrade, Serbia
| | - Alexis Gaudin
- Faculty of Dental Surgery, University of Nantes, Nantes, France; Inserm, U1229, Regenerative Medicine and Skeleton Research, RMeS, CHU Nantes, PHU 4 OTONN, 1 Place Alexis-Ricordeau, Nantes, France
| | - Jovan Grujic
- Faculty of Medicine, University of Belgrade, Dr. Subotica 8, Belgrade, Serbia
| | - Estela Maldonado
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, Faculty of Dentistry, University Complutense of Madrid, Pza. Ramón y Cajal, s/n, Madrid, Spain
| | - Aleksandra Petkovic-Curcin
- Institute for Medical Research, Military Medical Academy, Crnotravska 17, Belgrade, Serbia; Medical Faculty, University of Defence, Belgrade, Serbia
| | - Danilo Vojvodic
- Institute for Medical Research, Military Medical Academy, Crnotravska 17, Belgrade, Serbia; Medical Faculty, University of Defence, Belgrade, Serbia
| | - Anton Sculean
- Faculty of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, Switzerland
| | - Mia Rakic
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, Faculty of Dentistry, University Complutense of Madrid, Pza. Ramón y Cajal, s/n, Madrid, Spain; Institute for Biological Research "Sinisa Stankovic", University of Belgrade, Bulevar despota Stefana 142, Belgrade, Serbia.
| |
Collapse
|
12
|
Oguz Ahmet BS, Sayin Ozel G, Mutluay MM, Tezvergil Mutluay A. Effect of gallic acid addition on some mechanical properties of self-adhesive resin cements. Braz Oral Res 2019; 33:e053. [PMID: 31531561 DOI: 10.1590/1807-3107bor-2019.vol33.0053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 06/05/2019] [Indexed: 01/22/2023] Open
Abstract
Self-adhesive resin cements (RCs) activate matrix metalloproteinase (MMP) and cathepsin-related collagen degradation, and gallic acid (GA) inhibits the activity of both MMPs and cysteine cathepsins. The purpose of this study was to evaluate the setting time, biaxial flexural strength, and Vickers hardness of self-adhesive RCs after the addition of two different concentrations of GA. RelyX U200 (3M ESPE) and Panavia SA (Kuraray) were modified with 0.5 and 1 wt% GA. The setting time of five samples in each RC group was assessed using a thermocouple apparatus as described in the ISO 4049 test. Biaxial flexure strength was measured using a universal testing machine until failure. Vickers hardness was measured with three randomized indentations on the surface of each resin disc. RCs without GA were used as control. Data were analyzed using a one-way analysis of variance and Tukey's HSD test (α = 0.05). The setting times ranged from 2.4 to 4.6 min for RelyX and from 4.9 to 6.0 min for Panavia. The biaxial flexure strength ranged from 76.5 to 109.7 MPa for RelyX and from 73.3 to 108.2 MPa for Panavia. Vickers hardness values ranged from 41.6 to 58.6 for RelyX and 27.2 to 33.6 for Panavia. The addition of 0.5 and 1 wt% GA to improve durability of resin-dentin bonds had no adverse effects on setting time, whereas the biaxial flexure strength and Vickers hardness values for the tested materials were significantly reduced.
Collapse
Affiliation(s)
- Bebek Serra Oguz Ahmet
- Istanbul Medipol University, School of Dentistry, Department of Prosthodontics, Istanbul, Turkey
| | - Gulsum Sayin Ozel
- Istanbul Medipol University, School of Dentistry, Department of Prosthodontics, Istanbul, Turkey
| | - Mustafa Murat Mutluay
- University of Eastern Finland, Institute of Dentistry, Department of Prosthetic Dentistry, Kuopio, Finland
| | - Arzu Tezvergil Mutluay
- University of Turku, Institute of Dentistry, Department of Restorative Dentistry and Cariology, Turku, Finland
| |
Collapse
|
13
|
Silva AC, Melo P, Ferreira J, Oliveira S, Gutknecht N. Influence of grape seed extract in adhesion on dentin surfaces conditioned with Er,Cr:YSGG laser. Lasers Med Sci 2019; 34:1493-1501. [PMID: 30830558 DOI: 10.1007/s10103-019-02749-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 02/12/2019] [Indexed: 11/26/2022]
Abstract
The proanthocyanidin (PA)-rich grape seed extract (GSE) is a collagen cross-linking agent that can perform a chemical bond with the dentin's collagen. The objective of this study was to evaluate the influence on shear bond strength (SBS) of the pre-conditioning of GSE, on human dentin surfaces conditioned with Er,Cr:YSGG laser. The sample consisted of 64 non-carious human teeth, divided into eight groups, four groups conditioned with Er,Cr:YSGG laser (4.5 W, 50 Hz, 50 μs, 70% air, 90% water) and four prepared with conventional methods (control). In both groups, a GSE solution was applied before using the two adhesives tested: Clearfil™ SE Bond (CSE) and Scotchbond™ Universal (SU). Subsequently, a SBS test, a scanning electron microscopy, and a statistical analysis were performed. In the laser groups, the best SBS mean (20.08 ± 4.01 MPa) was achieved in the group treated with GSE and CSE. The control group with the application of CSE showed the highest SBS mean (24.27 ± 10.28 MPa), and the group treated with laser and SU showed the lowest SBS mean (12.94 ± 6.51 MPa). Between these two groups there was a statistically significant difference (p = 0.05). However, this was not observed among the laser or control groups. The type of dentin surface preparation can influence the SBS. The CSE showed better SBS in laser and control groups. The presence of GSE did not improve the adhesion on surfaces conditioned with laser, but more studies should be carried out in the future to confirm this conclusion.
Collapse
Affiliation(s)
- Ana C Silva
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal.
| | - Paulo Melo
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal
| | - João Ferreira
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal
| | - Sofia Oliveira
- Department of Dental Biomaterials, Faculdade de Medicina Dentária da Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal
| | - Norbert Gutknecht
- Department of Operative Dentistry, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| |
Collapse
|
14
|
Resin-Dentin Bonding Interface: Mechanisms of Degradation and Strategies for Stabilization of the Hybrid Layer. Int J Biomater 2019; 2019:5268342. [PMID: 30853990 PMCID: PMC6378048 DOI: 10.1155/2019/5268342] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/03/2018] [Accepted: 12/28/2018] [Indexed: 12/14/2022] Open
Abstract
Several studies have shown that the dentin-resin interface is unstable due to poor infiltration of resin monomers into the demineralized dentin matrix. This phenomenon is related to the incomplete infiltration of the adhesive system into the network of exposed collagen fibrils, mainly due to the difficulty of displacement and subsequent replacement of trapped water between interfibrillar spaces, avoiding adequate hybridization within the network of collagen fibrils. Thus, unprotected fibrils are exposed to undergo denaturation and are susceptible to cyclic fatigue rupture after being subjected to repetitive loads during function. The aqueous inclusions within the hybrid layer serve as a functional medium for the hydrolysis of the resin matrix, giving rise to the activity of esterases and collagenolytic enzymes, such as matrix metalloproteinases, which play a fundamental role in the degradation process of the hybrid layer. Achieving better interdiffusion of the adhesive system in the network of collagen fibrils and the substrate stability in the hybrid layer through different strategies are key events for the interfacial microstructure to adequately function. Hence, it is important to review the factors related to the mechanisms of degradation and stabilization of the hybrid layer to support the implementation of new materials and techniques in the future. The enzymatic degradation of collagen matrix, together with resin leaching, has led to seeking strategies that inhibit the endogenous proteases, cross-linking the denudated collagen fibrils and improving the adhesive penetration removing water from the interface. Some of dentin treatments have yielded promising results and require more research to be validated. A longer durability of adhesive restorations could resolve a variety of clinical problems, such as microleakage, recurrent caries, postoperative sensitivity, and restoration integrity.
Collapse
|
15
|
Porto ICCM, Nascimento TG, Oliveira JMS, Freitas PH, Haimeur A, França R. Use of polyphenols as a strategy to prevent bond degradation in the dentin-resin interface. Eur J Oral Sci 2018; 126:146-158. [DOI: 10.1111/eos.12403] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Isabel C. C. M. Porto
- Laboratory of Characterization and Analysis of Biomaterials; Faculty of Dentistry; Federal University of Alagoas; Alagoas Brazil
- Laboratory of Quality Control of Drugs, Medicines, Foods and Biomaterials; School of Nursing and Pharmacy; Federal University of Alagoas; Alagoas Brazil
- Dental Biomaterials Research Laboratory; Department of Restorative Dentistry; College of Dentistry; University of Manitoba; Manitoba Canada
| | - Ticiano G. Nascimento
- Laboratory of Quality Control of Drugs, Medicines, Foods and Biomaterials; School of Nursing and Pharmacy; Federal University of Alagoas; Alagoas Brazil
| | - José M. S. Oliveira
- Laboratory of Quality Control of Drugs, Medicines, Foods and Biomaterials; School of Nursing and Pharmacy; Federal University of Alagoas; Alagoas Brazil
| | - Pedro H. Freitas
- Dental Biomaterials Research Laboratory; Department of Restorative Dentistry; College of Dentistry; University of Manitoba; Manitoba Canada
| | - Asmaa Haimeur
- Dental Biomaterials Research Laboratory; Department of Restorative Dentistry; College of Dentistry; University of Manitoba; Manitoba Canada
| | - Rodrigo França
- Dental Biomaterials Research Laboratory; Department of Restorative Dentistry; College of Dentistry; University of Manitoba; Manitoba Canada
| |
Collapse
|
16
|
Fang H, Li QL, Han M, Mei ML, Chu CH. Anti-proteolytic property and bonding durability of mussel adhesive protein-modified dentin adhesive interface. Dent Mater 2017; 33:1075-1083. [DOI: 10.1016/j.dental.2017.07.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 04/10/2017] [Accepted: 07/08/2017] [Indexed: 11/27/2022]
|
17
|
Sun S, Wang GL, Huang Y, Diwu HL, Luo YC, Su J, Xiao YH. The effects of 2-hydroxyethyl methacrylate on matrix metalloproteinases 2 and 9 in human pulp cells and odontoblast-like cells in vitro. Int Endod J 2017; 51 Suppl 2:e157-e166. [PMID: 28667765 DOI: 10.1111/iej.12812] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 06/27/2017] [Indexed: 12/17/2022]
Abstract
AIM To assess the effects of 2-hydroxyethyl methacrylate (HEMA) on proliferation and migration of human pulp cells, as well as on matrix metalloproteinase (MMP-2 and MMP-9) expression in human odontoblast-like cells, contributing to the goal of determining the relationship between resin materials and MMP activity in pulp-dentine complexes. METHODOLOGY Dental pulp cell cultures were established from pulp tissue of human teeth extracted for orthodontic purposes. Pulp cell differentiation was characterized in the presence of dentine sialophosphoprotein, bone sialoprotein and alkaline phosphatase by reverse transcription polymerase chain reaction. MMP activity was assessed by gelatine zymography with media containing HEMA. Cell viability was evaluated using methyl thiazolyl tetrazolium assay for 24-72 h. Cell migration was tested using Transwell migration assay. Western blotting was used to visualize MMP expression with the nontoxic HEMA concentrations (0-400 μg mL-1 ) for 48 h. RESULTS Pulp cell proliferation decreased with HEMA exposure in a time- and concentration-dependent manner. HEMA concentrations ≤400 μg mL-1 did not induce changes in cell viability at 48 h (P < 0.05). Pulp cells were induced to differentiate into odontoblast-like cells in media containing 5 mg mL-1 ascorbic acid and 10 mmol L-1 β-sodium glycerophosphate for 3-4 weeks. After incubation with HEMA, dose-dependent inhibition was observed; HEMA had a strong inhibitory effect on MMP activity. Compared with the control group, cell migration and MMP expression were inhibited significantly with increasing HEMA concentration at noncytotoxic doses (P < 0.05). CONCLUSIONS Cell viability was not affected at HEMA concentrations ≤400 μg mL-1 . Within this range, HEMA inhibited MMP-2 and MMP-9 expression and activity, which may protect against type I collagen degradation effectively during dentine adhesive procedures.
Collapse
Affiliation(s)
- S Sun
- Department of Stomatology, Kunming General Hospital of Chengdu Military Command, Teaching Hospital of Kunming Medical University, Kunming, China.,Department of Stomatology, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, China
| | - G-L Wang
- Molecular Pharmacology Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Y Huang
- Molecular Pharmacology Laboratory, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - H-L Diwu
- Department of Stomatology, Kunming General Hospital of Chengdu Military Command, Teaching Hospital of Kunming Medical University, Kunming, China
| | - Y-C Luo
- Department of Stomatology, Kunming General Hospital of Chengdu Military Command, Teaching Hospital of Kunming Medical University, Kunming, China
| | - J Su
- Department of Stomatology, Kunming General Hospital of Chengdu Military Command, Teaching Hospital of Kunming Medical University, Kunming, China
| | - Y-H Xiao
- Department of Stomatology, Kunming General Hospital of Chengdu Military Command, Teaching Hospital of Kunming Medical University, Kunming, China
| |
Collapse
|
18
|
Tezvergil-Mutluay A, Seseogullari-Dirihan R, Feitosa V, Cama G, Brauer D, Sauro S. Effects of Composites Containing Bioactive Glasses on Demineralized Dentin. J Dent Res 2017; 96:999-1005. [DOI: 10.1177/0022034517709464] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to evaluate the degradation of completely demineralized dentin specimens in contact with a filler-free or 2 ion-releasing resins containing micrometer-sized particles of Bioglass 45S5 (BAG) or fluoride-containing phosphate-rich bioactive glass (BAG-F). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were also used to evaluate the remineralization induced by the experimental ion-releasing resin-based materials. Dentin beams were totally demineralized in H3PO4 (10%) and placed in direct contact with a filler-free (RESIN) or 2 experimental ion-releasing resins (BAG or BAG-F) and immersed in artificial saliva (AS) up to 30 d. Further specimens were also processed and submitted to FTIR and SEM analysis to evaluate the remineralization induced by such ion-releasing resins before and after AS immersion. BAG and BAG-F alkalinized the incubation media. A significant decrease of the dry mass was observed between the specimens of all groups stored for 3 and 30 d in AS. However, the fluoride-containing phosphate-rich bioactive glass incorporated into a resin-based material (BAG-F) showed greater ability in reducing the solubilization of C-terminal cross-linked telopeptide (ICTP) and C-terminal telopeptide (CTX) after prolonged AS storage. Moreover, after 30 d of AS storage, BAG-F showed the greatest remineralizing effect on the stiffness of the completely demineralized dentin matrices. In conclusion, fluoride-containing phosphate-rich bioactive glass incorporated as micrometer-sized filler in dental composites may offer greater beneficial effects than Bioglass 45S5 in reducing the enzyme-mediated degradation and remineralization of demineralized dentin.
Collapse
Affiliation(s)
- A. Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland, and Turku University Hospital, TYKS, Turku, Finland
| | - R. Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland, and Turku University Hospital, TYKS, Turku, Finland
| | - V.P. Feitosa
- Research Division, Paulo Picanço School of Dentistry, Fortaleza, Brazil
| | - G. Cama
- Polymer Chemistry & Biomaterials Group, University of Ghent, Ghent, Belgium
| | - D.S. Brauer
- Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Jena, Germany
| | - S. Sauro
- Dental Biomaterials, Departamento de Odontología, Facultad de Ciencias de la Salud, University CEU-Cardenal Herrera, Valencia, Spain
- Biomaterials, Biophotonics and Tissue Engineering, King’s College London Dental Institute (KCLDI), London, UK
| |
Collapse
|
19
|
Botelho J, Cavacas MA, Borrecho G, Polido M, Oliveira P, Martins Dos Santos J. Human ex vivo dentin-pulp complex preservation in a full crown model. J Oral Biol Craniofac Res 2017; 7:19-22. [PMID: 28316916 DOI: 10.1016/j.jobcr.2016.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/11/2016] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Currently, there is lack of human in vitro full tooth models that hold the odontoblast layer with pulp tissue in their native environment. The appearance of new in vitro and in vivo models has provided new understanding of the potential of tissue engineering in dental pulp regeneration. However, the development of new in vitro full tooth models will allow us to get closer to in vivo conditions. Thus, the aim of this study is to preserve a living dentin-pulp complex, in a novel in vitro full crown model, after tooth extraction. METHODS Twenty intact third molars, after preparation, were divided into four groups, with five samples each. We placed the negative control samples (C) in saline, and the tested groups were placed (T) in supplemented DMEM, at two different times: 1 and 7 days. The specimens were processed for light microscopy observation. RESULTS Contrary to C-groups, T-groups showed a functional dentin-pulp complex. The treated dentin-pulp complex presents normal histological appearance. CONCLUSIONS This study showed that it is possible to preserve a living dentin-pulp complex after tooth extraction during 7 days.
Collapse
Affiliation(s)
- João Botelho
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Maria Alzira Cavacas
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Gonçalo Borrecho
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Mário Polido
- Instituto Superior de Ciências da Saúde Egas Moniz, Dental Materials Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - Pedro Oliveira
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| | - José Martins Dos Santos
- Instituto Superior de Ciências da Saúde Egas Moniz, Anatomy Department, Campus Universitário, Quinta da Granja, Caparica, Setúbal, Portugal
| |
Collapse
|
20
|
Elkassas D, Arafa A. The innovative applications of therapeutic nanostructures in dentistry. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1543-1562. [PMID: 28232213 DOI: 10.1016/j.nano.2017.01.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 01/21/2017] [Accepted: 01/30/2017] [Indexed: 02/05/2023]
Abstract
Nanotechnology has paved multiple ways in preventing, reversing or restoring dental caries which is one of the major health care problems. Nanotechnology aided in processing variety of nanomaterials with innovative dental applications. Some showed antimicrobial effect helping in the preventive stage. Others have remineralizing potential intercepting early lesion progression as nanosized calcium phosphate, carbonate hydroxyapatite nanocrystals, nanoamorphous calcium phosphate and nanoparticulate bioactive glass particularly with provision of self-assembles protein that furnish essential role in biomimetic repair. The unique size of nanomaterials makes them fascinating carriers for dental products. Thus, it is recentlyclaimedthat fortifying the adhesives with nanomaterials that possess biological meritsdoes not only enhance the mechanical and physical properties of the adhesives, but also help to attain and maintain a durable adhesive joint and enhanced longevity. Accordingly, this review will focus on the current status and the future implications of nanotechnology in preventive and adhesive dentistry.
Collapse
Affiliation(s)
- Dina Elkassas
- Department of Operative Dentistry, Faculty of Oral and Dental Medicine, Misr International University, Egypt
| | - Abla Arafa
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Oral and Dental Medicine, Misr International University, Egypt.
| |
Collapse
|
21
|
Apolonio FM, Mazzoni A, Angeloni V, Scaffa PMC, Santi S, Saboia VDPA, Tay FR, Pashley DH, Breschi L. Effect of a one-step self-etch adhesive on endogenous dentin matrix metalloproteinases. Eur J Oral Sci 2017; 125:168-172. [DOI: 10.1111/eos.12337] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Fabianni M. Apolonio
- Division of Dentistry; Manaus Air Force Hospital - Brazilian Air Force; Contorno Avenue; Manaus Amazonas Brazil
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences; DIBINEM; University of Bologna - Alma Mater Studiorum; Bologna Italy
| | - Valeria Angeloni
- Department of Biomedical and Neuromotor Sciences; DIBINEM; University of Bologna - Alma Mater Studiorum; Bologna Italy
| | - Polliana M. C. Scaffa
- Department of Oral Biology; Bauru School of Dentistry; University of São Paulo (USP); Bauru Brazil
| | - Spartaco Santi
- Institute of Molecular Genetics; CNR-National Research Council of Italy; Bologna Italy
- SC Laboratory of Musculoskeletal Cell Biology; Rizzoli Orthopedic Institute; Bologna Italy
| | - Vicente de Paulo A. Saboia
- Department of Restorative Dentistry; School of Dentistry; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceará; Fortaleza Ceará Brazil
| | - Franklin R. Tay
- Department of Oral Biology; College of Dental Medicine; Georgia Regents University; Augusta GA USA
| | - David H. Pashley
- Department of Oral Biology; College of Dental Medicine; Georgia Regents University; Augusta GA USA
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences; DIBINEM; University of Bologna - Alma Mater Studiorum; Bologna Italy
| |
Collapse
|
22
|
Pucci CR, Araújo RMD, Lacerda AJFD, Souza MAD, Huhtala MFRL, Feitosa FA. Effects of Contamination by Hemostatic Agents and Use of Cleaning Agent on Etch-and-Rinse Dentin Bond Strength. Braz Dent J 2016; 27:688-692. [DOI: 10.1590/0103-6440201600685] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 08/04/2016] [Indexed: 11/22/2022] Open
Abstract
Abstract The aim of this study was to evaluate the influence of contamination by hemostatic agents and rinsing with chlorhexidine on bond strength between dentin and resin composite. Ninety-six bovine teeth were sectioned to expose a flat dentin surface area. A standardized cavity with 2.0 mm in thickness, superficial diameter of 4.0 mm and bottom diameter of 3.0 mm was prepared with a diamond bur in each dentin specimen. The teeth were divided into four groups according to the hemostatic employed: G1: control; G2: use of ViscoStat, Ultradent; G3: Hemosthasegel, FGM; and G4: Hemostop, Dentsply. The groups were divided into two subgroups according to the cleaning protocol method (n=12): A: without any further cleaning; and B: cleaning with chlorhexidine at 0.2%. All cavities were filled using a dentin adhesive and a resin composite, following the manufacturer's instructions. After 24 h, the specimens were aged by thermal and mechanical cycling. The bond strength was determined by the push out bond test (MPa), Statistical analysis was performed using two-way ANOVA and Tukey test (p<0.05). Statistically significant differences were detected among all groups treated with hemostatic agents and the control group. The post-hoc test showed that cleaning the cavity with chlorhexidine significantly improves the bond strength between dentin and resin composite. Our results suggested that the use of chlorhexidine can reestablish the bond strength between dentin and resin composite when a hemostatic agent was applied.
Collapse
|
23
|
Dačić S, Veselinović AM, Mitić A, Nikolić M, Cenić M, Dačić-Simonović D. Marginal adaptation of composite resins under two adhesive techniques. Microsc Res Tech 2016; 79:1031-1037. [DOI: 10.1002/jemt.22738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 04/20/2016] [Accepted: 07/09/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Stefan Dačić
- Department for Restorative Dentistry and Endodontics; University of Niš, Faculty of Medicine, Clinic of Dentistry; Niš Serbia
| | | | - Aleksandar Mitić
- Department for Restorative Dentistry and Endodontics; University of Niš, Faculty of Medicine, Clinic of Dentistry; Niš Serbia
| | - Marija Nikolić
- Department for Restorative Dentistry and Endodontics; University of Niš, Faculty of Medicine, Clinic of Dentistry; Niš Serbia
| | | | - Dragica Dačić-Simonović
- Department for Restorative Dentistry and Endodontics; University of Niš, Faculty of Medicine, Clinic of Dentistry; Niš Serbia
| |
Collapse
|
24
|
Manchorova-Veleva NA, Vladimirov SB, Keskinova DА. Clinical Effect of Dental Adhesive on Marginal Integrity in Class I And Class II Resin-Composite Restorations. Folia Med (Plovdiv) 2016; 57:250-6. [PMID: 27180353 DOI: 10.1515/folmed-2015-0046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 12/10/2015] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Dental adhesives are believed to influence marginal adaptation and marginal discoloration when used under posterior resin-based composite restorations. Studies on the latest adhesive systems reveal that the group of the three-step etch-and-rinse adhesive (3-E&RA) and the one-step self-etch adhesive (1-SEA) have entirely different bonding mechanisms, as well as different bond strength and resistance to chemical, thermal and mechanical factors. STUDY OBJECTIVES A hypothesis that a 1-SEA would result in greater enamel marginal discoloration and poorer marginal adaptation than a 3-E&RA was tested. MATERIAL AND METHODS One hundred restorations were placed with a 1-SEA and 100 restorations with a 3-E&RA. Teeth were restored with Filtek Supreme nanofilled resin-composite and were evaluated for marginal adaptation and marginal discoloration at baseline, and 6 months, 12 months, and 36 months postoperatively. RESULTS The statistical analysis revealed significant differences in marginal integrity between test groups. The 1-SEA resulted in greater enamel marginal discoloration and poorer marginal adaptation than the 3-E&RA at any recall time. CONCLUSIONS Marginal adaptation and marginal discoloration depend on the type of dentin adhesive used. The restorations with Filtek Supreme and Scotchbond MP are better than the restorations with Adper Prompt L-Pop with regard to the marginal adaptation and marginal discoloration at 6-, 12- and 36-month evaluations.
Collapse
Affiliation(s)
- Neshka A Manchorova-Veleva
- Department of Operative Dentistry and Endodontics, Faculty of Dental Medicine, Medical University, Plovdiv
| | - Stoyan B Vladimirov
- Department of Operative Dentistry and Endodontics, Faculty of Dental Medicine, Medical University, Plovdiv
| | - Donka А Keskinova
- Department of Applied and Institutional Sociology, Faculty of Philosophy and History, Paisii Hilendarski University, Plovdiv, Bulgaria
| |
Collapse
|
25
|
|
26
|
Pinna R, Maioli M, Eramo S, Mura I, Milia E. Carious affected dentine: its behaviour in adhesive bonding. Aust Dent J 2015; 60:276-93. [DOI: 10.1111/adj.12309] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2015] [Indexed: 01/31/2023]
Affiliation(s)
- R Pinna
- Department of Biomedical Science; University of Sassari; Sassari Italy
| | - M Maioli
- Department of Biomedical Science; University of Sassari; Sassari Italy
- National Institute of Biostructures and Biosystems; Italy
| | - S Eramo
- Department of Surgery and Biomedical Science; University of Perugia; Perugia Italy
| | - I Mura
- Department of Biomedical Science; University of Sassari; Sassari Italy
| | - E Milia
- Department of Biomedical Science; University of Sassari; Sassari Italy
| |
Collapse
|
27
|
Muromachi K, Kamio N, Matsuki-Fukushima M, Narita T, Nishimura H, Tani-Ishii N, Sugiya H, Matsushima K. Metalloproteases and CCN2/CTGF in dentin–pulp complex repair. J Oral Biosci 2015. [DOI: 10.1016/j.job.2014.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
28
|
de Oliveira Moreira PE, Pamplona LS, Nascimento GCR, Esteves RA, Pessoa OF, Silva CM. Effects of Internal Bleaching on the Adhesion of Glass-Fiber Posts. Open Dent J 2015; 9:375-9. [PMID: 26962369 PMCID: PMC4763955 DOI: 10.2174/1874210601509010375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/11/2015] [Accepted: 09/29/2015] [Indexed: 12/04/2022] Open
Abstract
Objective: We evaluated the effects of internal bleaching on the adhesion of glass-fiber posts (GFPs) luted with different resin cements. Methods: Forty extracted human single-root teeth were endodontically treated and divided into four groups (n=10): G1- conventional resin cement (CRC); G2- self-adhesive resin cement (SARC); G3- bleaching + CRC; and G4- bleaching + SARC. Specimens were sectioned transversally into three slices to perform the push-out test at the coronal, middle and apical regions of the root canals. Data were analyzed using analysis of variance and Tukey's test (p<0.05). Results: The push-out bond strength of GFPs luted with SARC after bleaching (G4) was significantly lower than that of the other groups (p<0.001). We found no statistically significant differences in push-out bond strength among the other groups. Significance: Internal bleaching reduced the adhesion of GFPs luted with SARC. The adhesion of GFPs luted with CRC was not decreased after bleaching.
Collapse
Affiliation(s)
| | - Lucianne S Pamplona
- Department of Dentistry, School of Dentistry of Federal University of Pará, Belém, Pará, Brazil
| | - Gláucia C R Nascimento
- Department of Dentistry, School of Dentistry of Federal University of Pará, Belém, Pará, Brazil
| | - Renata A Esteves
- Department of Prosthodontics, School of Dentistry of Federal University of Pará, Belém, Pará, Brazil
| | - Oscar F Pessoa
- Department of Endodontics, School of Dentistry of Federal University of Pará, Belém, Pará, Brazil
| | - Cecy M Silva
- Department of Dentistry, School of Dentistry of Federal University of Pará, Belém, Pará, Brazil
| |
Collapse
|
29
|
Mazzoni A, Tjäderhane L, Checchi V, Di Lenarda R, Salo T, Tay FR, Pashley DH, Breschi L. Role of dentin MMPs in caries progression and bond stability. J Dent Res 2014; 94:241-51. [PMID: 25535202 DOI: 10.1177/0022034514562833] [Citation(s) in RCA: 215] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Dentin can be described as a biological composite with collagen matrix embedded with nanosized hydroxyapatite mineral crystallites. Matrix metalloproteinases (MMPs) and cysteine cathepsins are families of endopeptidases. Enzymes of both families are present in dentin and collectively capable of degrading virtually all extracellular matrix components. This review describes these enzymes and their presence in dentin, mainly focusing on their role in dentin caries pathogenesis and loss of collagen in the adhesive hybrid layer under composite restorations. MMPs and cysteine cathepsins present in saliva, mineralized dentin, and/or dentinal fluid may affect the dentin caries process at the early phases of demineralization. Changes in collagen and noncollagenous protein structure may participate in observed decreases in mechanical properties of caries-affected dentin and reduce the ability of caries-affected dentin to remineralize. These endogenous enzymes also remain entrapped within the hybrid layer during the resin infiltration process, and the acidic bonding agents themselves (irrespective of whether they are etch-and-rinse or self-etch) can activate these endogenous protease proforms. Since resin impregnation is frequently incomplete, denuded collagen matrices associated with free water (which serves as a collagen cleavage reagent for these endogenous hydrolase enzymes) can be enzymatically disrupted, finally contributing to the degradation of the hybrid layer. There are multiple in vitro and in vivo reports showing that the longevity of the adhesive interface is increased when nonspecific enzyme-inhibiting strategies are used. Different chemicals (i.e., chlorhexidine, galardin, and benzalkonium chloride) or collagen cross-linker agents have been successfully employed as therapeutic primers in the bonding procedure. In addition, the incorporation of enzyme inhibitors (i.e., quaternary ammonium methacrylates) into the resin blends has been recently promoted. This review will describe MMP functions in caries and hybrid layer degradation and explore the potential therapeutic role of MMP inhibitors for the development of improved intervention strategies for MMP-related oral diseases.
Collapse
Affiliation(s)
- A Mazzoni
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - L Tjäderhane
- Institute of Dentistry, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - V Checchi
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - R Di Lenarda
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - T Salo
- Institute of Dentistry, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - F R Tay
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - D H Pashley
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - L Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Italy
| |
Collapse
|
30
|
Derbanne M, Le Goff S, Attal JP. Dental Adhesives. Biomaterials 2014. [DOI: 10.1002/9781119043553.ch10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
31
|
Tezvergil-Mutluay A, Seseogullari-Dirihan R, Feitosa VP, Tay FR, Watson TF, Pashley DH, Sauro S. Zoledronate and ion-releasing resins impair dentin collagen degradation. J Dent Res 2014; 93:999-1004. [PMID: 25074494 PMCID: PMC4212321 DOI: 10.1177/0022034514546043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 07/04/2014] [Accepted: 07/12/2014] [Indexed: 01/27/2023] Open
Abstract
This study analyzed the amounts of solubilized telopeptides cross-linked carboxyterminal telopeptide of type I collagen (ICTP) and C-terminal crosslinked telopeptide of type I collagen (CTX) derived from matrix-metalloproteinases (MMPs) and cysteine cathepsins (CTPs) subsequent to application of a filler-free (Res.A) or an ion-releasing resin (Res.B) to ethylenediaminetetraacetic acid (EDTA)-demineralized dentin with or without zoledronate-containing primer (Zol-primer) pre-treatment. The chemical modification induced following treatments and artificial saliva (AS) storage was also analyzed through attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). Totally EDTA-demineralized specimens were infiltrated with Res.A or Res.B with or without Zol-primer pre-treatment, light-cured, and immersed in AS for up to 4 wk. ICTP release was reduced following infiltration with Res.B and further reduced when Res.B was used with Zol-primer; remarkable phosphate mineral uptake was attained after AS storage. CTX release was increased in Res.A- and Res.B-treated dentin. However, when Zol-primer was used with Res.A, the CTX release fell significantly compared to the other tested resin-infiltration methods. In conclusion, zoledronate offers an additional inhibitory effect to the ion-releasing resins in MMP-mediated collagen degradation. However, Zol-primer induces a modest reduction in CTX release only when used with resin-based systems containing no ion-releasing fillers.
Collapse
Affiliation(s)
- A Tezvergil-Mutluay
- Adhesive Dentistry Research Group, Institute of Dentistry, and TYKS University Hospital, University of Turku, Turku, Finland
| | - R Seseogullari-Dirihan
- Adhesive Dentistry Research Group, Institute of Dentistry, and TYKS University Hospital, University of Turku, Turku, Finland
| | - V P Feitosa
- Department of Restorative Dentistry, College of Dentistry, Federal University of Ceará, Fortaleza, Brazil
| | - F R Tay
- Department of Endodontics, College of Dental Medicine, Georgia Health Sciences University, Augusta, GA, USA
| | - T F Watson
- Biomaterials, Biomimetics & Biophotonics, King's College London Dental Institute at Guy's Hospital, London, UK
| | - D H Pashley
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - S Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Departamento de Odontología, Facultad de Ciencias de la Salud, CEU-Cardenal Herrera University, Valencia, Spain
| |
Collapse
|
32
|
Fik CP, Konieczny S, Pashley DH, Waschinski CJ, Ladisch RS, Salz U, Bock T, Tiller JC. Telechelic poly(2-oxazoline)s with a biocidal and a polymerizable terminal as collagenase inhibiting additive for long-term active antimicrobial dental materials. Macromol Biosci 2014; 14:1569-79. [PMID: 25130877 DOI: 10.1002/mabi.201400220] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/11/2014] [Indexed: 12/21/2022]
Abstract
Dental repair materials face the problem that the dentin below the composite fillings is actively decomposed by secondary caries and extracellular proteases. To address this problem, poly(2-methyloxazoline) with a biocidal and a polymerizable terminal was explored as additive for a commercial dental adhesive. 2.5 wt% of the additive rendered the adhesive contact-active against Streptococcus mutans and washing with water for 101 d did not diminish this effect. The adhesive with 5 wt% additive kills S. mutans cells in the tubuli of bovine dentin. Further, the additive inhibits bacterial collagenase at 0.5 wt% and reduces activity of MMP-9. Human MMPs bound to dentin are inhibited by 96% in a medium with 5 wt% additive. Moreover, no adverse effect on the enamel/dentine shear bond strength was detected.
Collapse
Affiliation(s)
- Christoph P Fik
- Chair of Biomaterials and Polymer Science, Department of Biochemical and Chemical Engineering, TU Dortmund, Emil-Figge-Str. 66, 44227, Dortmund, Germany
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Sabatini C, Scheffel DLS, Scheffel RH, Agee KA, Rouch K, Takahashi M, Breschi L, Mazzoni A, Tjäderhane L, Tay FR, Pashley DH. Inhibition of endogenous human dentin MMPs by Gluma. Dent Mater 2014; 30:752-8. [PMID: 24846803 DOI: 10.1016/j.dental.2014.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 02/07/2014] [Accepted: 04/22/2014] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The objective of this study was to determine if Gluma dentin desensitizer (5.0% glutaraldehyde and 35% HEMA in water) can inhibit the endogenous MMPs of dentin matrices in 60 s and to evaluate its effect on dentin matrix stiffness and dry mass weight. METHODS Dentin beams of 2 mm×1 mm×6 mm were obtained from extracted human third molars coronal dentin. To measure the influence of Gluma treatment time on total MMP activity of dentin, beams were dipped in 37% phosphoric acid (PA) for 15 s and rinsed in water. The acid-etched beams were then dipped in Gluma for 5, 15, 30 or 60 s, rinsed in water and incubated into SensoLyte generic MMP substrate (AnaSpec, Inc.) for 60 min. Controls were dipped in water for 60 s. Additional beams of 1 mm×1 mm×6 mm were completely demineralized in 37% PA for 18 h, rinsed and used to evaluate changes on the dry weight and modulus of elasticity (E) after 60 s of Gluma treatment followed by incubation in simulated body fluid buffer for 0, 1 or 4 weeks. E was measured by 3-pt flexure. RESULTS Gluma treatment inhibited total MMP activity of acid-etched dentin by 44, 50, 84, 86% after 5, 15, 30 or 60 s of exposure, respectively. All completely demineralized dentin beams lost stiffness after 1 and 4 weeks, with no significant differences between the control and Gluma-treated dentin. Gluma treatment for 60 s yielded significantly less dry mass loss than the control after 4 weeks. SIGNIFICANCE The use of Gluma may contribute to the preservation of adhesive interfaces by its cross-linking and inhibitory properties of endogenous dentin MMPs.
Collapse
Affiliation(s)
- Camila Sabatini
- Department of Restorative Dentistry, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA.
| | - Débora L S Scheffel
- Department of Orthodontics and Pediatric Dentistry, Universidade Estadual Paulista - UNESP, Araraquara Dental School, Araraquara, São Paulo, Brazil
| | - Régis H Scheffel
- Department of Orthodontics and Pediatric Dentistry, Universidade Estadual Paulista - UNESP, Araraquara Dental School, Araraquara, São Paulo, Brazil
| | - Kelli A Agee
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - Katelyn Rouch
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - Masahiro Takahashi
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lorenzo Breschi
- Department of Biomedicine, University of Trieste, Trieste, Italy; IGM-CNR, Unit of Bologna c/o IOR, Bologna, Italy
| | | | - Leo Tjäderhane
- Institute of Dentistry, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Franklin R Tay
- Department of Endodontics, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA
| | - David H Pashley
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, Augusta, GA, USA; Highly Cited Investigator of King Abdulazis University School of Dentistry, Jeddah, Saudi Arabia
| |
Collapse
|
34
|
Tjäderhane L, Buzalaf MA, Salo T. The origin of matrix metalloproteinases in attrited dentine. Arch Oral Biol 2013; 59:233-5. [PMID: 24370196 DOI: 10.1016/j.archoralbio.2013.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 11/21/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Leo Tjäderhane
- Institute of Dentistry, University of Oulu, Oulu University Hospital, Oulu, Finland; Institute of Dentistry, University of Turku, Turku, Finland; Nordic Institute of Dental Materials (NIOM), Oslo, Norway.
| | - Marília A Buzalaf
- Discipline of Biochemistry, Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Tuula Salo
- Institute of Dentistry, University of Oulu, Oulu University Hospital, Oulu, Finland; Institute of Dentistry, University of Helsinki, Helsinki, Finland
| |
Collapse
|
35
|
Reis A, Carrilho M, Breschi L, Loguercio AD. Overview of Clinical Alternatives to Minimize the Degradation of the Resin-dentin Bonds. Oper Dent 2013; 38:E1-E25. [DOI: 10.2341/12-258-lit] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
The incorporation of hydrophilic and acidic resin monomers substantially improved the initial bonding of contemporary etch-and-rinse (ER) and self-etch (SE) adhesives to intrinsically wet dental substrates, providing quite favorable immediate results, regardless of the bonding approach used. However, in the long term, the bonding effectiveness of most simplified ER and SE adhesives drop dramatically. This review examines the fundamental processes that are responsible for the aging mechanisms involved in the degradation of the resin-bonded interfaces and some possible clinical approaches that have been effective in minimizing or even preventing the degradation of the adhesive interfaces produced with simplified adhesives. The incorporation of some of the feasible approaches - described in this review - may improve the quality of the adhesive restorations performed in clinical practice, while manufacturers develop bonding materials that are less susceptible to the aging mechanisms present in the oral environment.
Collapse
Affiliation(s)
- A Reis
- Alessandra Reis, DDS, PhD, adjunct professor, State University of Ponta Grossa, Restorative Dentistry, Ponta Grossa, Brazil
| | - M Carrilho
- Marcela Rocha Carrilho, DDS, PhD, professor, GEO/Bandeirante University of São Paulo and School of Dentistry, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada
| | - L Breschi
- Lorenzo Breschi, DDS, PhD, professor, University of Trieste, Dental Sciences and Biomaterials, Trieste, Italy
| | - AD Loguercio
- Alessandro D. Loguercio, DDS, MS, PhD, adjunct professor, State University of Ponta Grossa, Restorative Dentistry, Ponta Grossa, Brazil
| |
Collapse
|
36
|
Tezvergil-Mutluay A, Mutluay M, Seseogullari-Dirihan R, Agee KA, Key WO, Scheffel DLS, Breschi L, Mazzoni A, Tjäderhane L, Nishitani Y, Tay FR, Pashley DH. Effect of phosphoric acid on the degradation of human dentin matrix. J Dent Res 2012; 92:87-91. [PMID: 23103634 DOI: 10.1177/0022034512466264] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study determined if dentin proteases are denatured by phosphoric acid (PA) used in etch-and-rinse dentin adhesives. Dentin beams were completely demineralized with EDTA for 30 days. We "acid-etched" experimental groups by exposing the demineralized dentin beams to 1, 10, or 37 mass% PA for 15 sec or 15 min. Control beams were not exposed to PA but were incubated in simulated body fluid for 3 days to assay their total endogenous telopeptidase activity, by their ability to solubilize C-terminal crosslinked telopeptides ICTP and CTX from insoluble dentin collagen. Control beams released 6.1 ± 0.8 ng ICTP and 0.6 ± 0.1 ng CTX/mg dry-wt/3 days. Positive control beams pre-incubated in p-aminophenylmercuric acetate, a compound known to activate proMMPs, released about the same amount of ICTP peptides, but released significantly less CTX. Beams immersed in 1, 10, or 37 mass% PA for 15 sec or 15 min released amounts of ICTP and CTX similar to that released by the controls (p > 0.05). Beams incubated in galardin, an MMP inhibitor, or E-64, a cathepsin inhibitor, blocked most of the release of ICTP and CTX, respectively. It is concluded that PA does not denature endogenous MMP and cathepsin activities of dentin matrices.
Collapse
Affiliation(s)
- A Tezvergil-Mutluay
- Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Optimizing dentin bond durability: control of collagen degradation by matrix metalloproteinases and cysteine cathepsins. Dent Mater 2012; 29:116-35. [PMID: 22901826 DOI: 10.1016/j.dental.2012.08.004] [Citation(s) in RCA: 284] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 08/04/2012] [Accepted: 08/05/2012] [Indexed: 11/21/2022]
Abstract
OBJECTIVES Contemporary adhesives lose their bond strength to dentin regardless of the bonding system used. This loss relates to the hydrolysis of collagen matrix of the hybrid layers. The preservation of the collagen matrix integrity is a key issue in the attempts to improve the dentin bonding durability. METHODS Dentin contains collagenolytic enzymes, matrix metalloproteinases (MMPs) and cysteine cathepsins, which are responsible for the hydrolytic degradation of collagen matrix in the bonded interface. RESULTS The identities, roles and function of collagenolytic enzymes in mineralized dentin has been gathered only within last 15 years, but they have already been demonstrated to have an important role in dental hard tissue pathologies, including the degradation of the hybrid layer. Identifying responsible enzymes facilitates the development of new, more efficient methods to improve the stability of dentin-adhesive bond and durability of bond strength. SIGNIFICANCE Understanding the nature and role of proteolytic degradation of dentin-adhesive interfaces has improved immensely and has practically grown to a scientific field of its own within only 10 years, holding excellent promise that stable resin-dentin bonds will be routinely available in a daily clinical setting already in a near future.
Collapse
|
38
|
Bertassoni LE, Orgel JPR, Antipova O, Swain MV. The dentin organic matrix - limitations of restorative dentistry hidden on the nanometer scale. Acta Biomater 2012; 8:2419-33. [PMID: 22414619 PMCID: PMC3473357 DOI: 10.1016/j.actbio.2012.02.022] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/16/2012] [Accepted: 02/28/2012] [Indexed: 11/28/2022]
Abstract
The prevention and treatment of dental caries are major challenges occurring in dentistry. The foundations for modern management of this dental disease, estimated to affect 90% of adults in Western countries, rest upon the dependence of ultrafine interactions between synthetic polymeric biomaterials and nanostructured supramolecular assemblies that compose the tooth organic substrate. Research has shown, however, that this interaction imposes less than desirable long-term prospects for current resin-based dental restorations. Here we review progress in the identification of the nanostructural organization of the organic matrix of dentin, the largest component of the tooth structure, and highlight aspects relevant to understating the interaction of restorative biomaterials with the dentin substrate. We offer novel insights into the influence of the hierarchically assembled supramolecular structure of dentin collagen fibrils and their structural dependence on water molecules. Secondly, we review recent evidence for the participation of proteoglycans in composing the dentin organic network. Finally, we discuss the relation of these complexly assembled nanostructures with the protease degradative processes driving the low durability of current resin-based dental restorations. We argue in favour of the structural limitations that these complexly organized and inherently hydrated organic structures may impose on the clinical prospects of current hydrophobic and hydrolyzable dental polymers that establish ultrafine contact with the tooth substrate.
Collapse
Affiliation(s)
- Luiz E Bertassoni
- Biomaterials Science Research Unit, Faculty of Dentistry, University of Sydney, United Dental Hospital, NSW, Australia.
| | | | | | | |
Collapse
|
39
|
Toledano M, Yamauti M, Ruiz-Requena ME, Osorio R. A ZnO-doped adhesive reduced collagen degradation favouring dentine remineralization. J Dent 2012; 40:756-65. [PMID: 22659338 DOI: 10.1016/j.jdent.2012.05.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 03/29/2012] [Accepted: 05/15/2012] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES The objective of the study was to determine the efficacy of a ZnO-doped etch and rinse adhesive in decreasing MMPs-mediated collagen degradation at the resin-dentine hybrid layer, and increasing bonding stability. METHODS C-terminal telopeptide concentrations (ICTP) were determined after 24h, 1wk and 4wk in human dentine beams. Dentine was treated: (1) 37% phosphoric acid for 15s (PA), (2) PA-etched dentine infiltrated with Single Bond (SB), (3) PA-etched dentine infiltrated with ZnO doped SB (ZnO particles--10wt%--were added to the bonding resin) (ZnO-SB), and (4) Clearfil SE Bond primed-dentine was infiltrated with Clearfil SE bonding resin (CSE). Microtensile bond strength (MTBS) was assessed for the different groups at 24h and after 3months. Debonded dentine surfaces were studied by scanning electron microscopy. RESULTS MMPs-mediated collagen degradation occurred in demineralized dentine (PA). Resin infiltration decreased collagen degradation. The lowest collagen degradation was found for Zn-doped SB, followed by CSE. When these adhesives were applied, ICTP values did not change throughout the study period. At 24h, similar MTBS was attained for all adhesives. Only SB decreased MTBS after three months. CONCLUSIONS Addition of ZnO particles to SB produced a reduction in dentine collagen degradation and increased resin-dentine bonds durability. In Zn-doped adhesive interfaces, a calcium phosphate layer and tubular occlusion was encountered at the debonded interface. CLINICAL SIGNIFICANCE ZnO particles addition into the bonding resin of SB makes a breakthrough to prevent the hybrid layer degradation and to preserve its bonding efficacy overtime.
Collapse
Affiliation(s)
- Manuel Toledano
- Department of Dental Materials, School of Dentistry, Campus de Cartuja s/n, University of Granada, Granada, Spain.
| | | | | | | |
Collapse
|
40
|
Wang DY, Zhang L, Fan J, Li F, Ma KQ, Wang P, Chen JH. Matrix metalloproteinases in human sclerotic dentine of attrited molars. Arch Oral Biol 2012; 57:1307-12. [PMID: 22608916 DOI: 10.1016/j.archoralbio.2012.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 04/01/2012] [Accepted: 04/22/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE The relationship between the major proteinases in dentine matrix metalloproteinases (MMPs) and the formation of collagen-less sclerotic dentine is still unknown. This study is to compare the concentrations of dentinal MMP-1, -2, -3, -8, and -9 between human sound and sclerotic dentine. DESIGN Eleven sound third molars from young patients and twenty-two attrited molars with sclerotic dentine from old patients were collected and three groups of dentine samples were obtained: sound dentine of young tooth (SDY), non-sclerotic dentine of attrited tooth (NDA) and sclerotic dentine of attrited tooth (SDA). The dentine powder from each group was subjected to demineralization and protein extraction in turn. Then the contents of MMP-1, -2, -3, -8 and -9 were quantitatively evaluated by Fluorescent Microsphere Immunoassay. The occlusal and fractured axial surfaces of sound and sclerotic dentine were observed using FEI-SEM. RESULTS There was no significant difference in the concentration of MMP-1 amongst all tested groups (p>0.05). The contents of MMP -2 and MMP-3 in SDY were significantly higher than those in NDA and SDA (p<0.05). The contents of MMP -8 and MMP -9 in SDA were significantly higher than those in SDY and NDA (p<0.05). The surface hypermineralised layer and sclerotic casts were all detected in sclerotic dentine under SEM. CONCLUSIONS The morphological characteristics of sclerotic dentine from the attrited molars were comparable to that from noncarious cervical lesions. Although depended on the type of MMP, the contents of dentinal MMPs changed during the formation of sclerotic dentine and long-term ageing.
Collapse
Affiliation(s)
- Dan-yang Wang
- Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | | | | | | | | | | | | |
Collapse
|
41
|
Stape THS, Menezes MS, Barreto BCF, Aguiar FHB, Martins LR, Quagliatto PS. Influence of matrix metalloproteinase synthetic inhibitors on dentin microtensile bond strength of resin cements. Oper Dent 2012; 37:386-96. [PMID: 22335305 DOI: 10.2341/11-256-l] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the effect of dentin pretreatment with 2% chlorhexidine (CHX) or 24% ethylenediamine tetra-acetic acid gel (EDTA) on the dentin microtensile bond strength (μTBS) of resin cements. Composite blocks were luted to superficial noncarious human dentin (n=10) using two resin cements (RelyX ARC [ARC] and RelyX U100 [U100]) and three dentin pretreatments (without pretreatment-control, CHX, and EDTA). CHX was applied for 60 seconds on the acid-etched dentin in the ARC/CHX group, and for the same time on smear layer-covered dentin in the U100/CHX group. EDTA was applied for 45 seconds on smear-covered dentin in the U100/EDTA group, and it replaced phosphoric acid conditioning in the ARC/EDTA group for 60 seconds. After storage in water for 24 hours, specimens were prepared for microtensile bond strength testing. The results were submitted to two-way analysis of variance (ANOVA) followed by Tukey test. ARC produced significantly higher μTBS (p<0.05) compared to the U100, except when EDTA was used. For ARC, no pretreatment and CHX produced higher μTBS than EDTA. For U100, EDTA produced higher μTBS; no statistical difference occurred between CHX pretreatment and when no pretreatment was performed. While CHX did not affect immediate dentin bond strength of both cements, EDTA improved bond strength of U100, but it reduced dentin bond strength of ARC.
Collapse
Affiliation(s)
- T H S Stape
- Department of Restorative Dentistry, University of Campinas, SP, Brazil
| | | | | | | | | | | |
Collapse
|
42
|
Carvalho RM, Manso AP, Geraldeli S, Tay FR, Pashley DH. Durability of bonds and clinical success of adhesive restorations. Dent Mater 2012; 28:72-86. [PMID: 22192252 PMCID: PMC3863938 DOI: 10.1016/j.dental.2011.09.011] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 09/19/2011] [Accepted: 09/19/2011] [Indexed: 11/26/2022]
Abstract
Resin-dentin bond strength durability testing has been extensively used to evaluate the effectiveness of adhesive systems and the applicability of new strategies to improve that property. Clinical effectiveness is determined by the survival rates of restorations placed in non-carious cervical lesions (NCCL). While there is evidence that the bond strength data generated in laboratory studies somehow correlates with the clinical outcome of NCCL restorations, it is questionable whether the knowledge of bonding mechanisms obtained from laboratory testing can be used to justify clinical performance of resin-dentin bonds. There are significant morphological and structural differences between the bonding substrate used in in vitro testing versus the substrate encountered in NCCL. These differences qualify NCCL as a hostile substrate for bonding, yielding bond strengths that are usually lower than those obtained in normal dentin. However, clinical survival time of NCCL restorations often surpass the durability of normal dentin tested in the laboratory. Likewise, clinical reports on the long-term survival rates of posterior composite restorations defy the relatively rapid rate of degradation of adhesive interfaces reported in laboratory studies. This article critically analyzes how the effectiveness of adhesive systems is currently measured, to identify gaps in knowledge where new research could be encouraged. The morphological and chemical analysis of bonded interfaces of resin composite restorations in teeth that had been in clinical service for many years, but were extracted for periodontal reasons, could be a useful tool to observe the ultrastructural characteristics of restorations that are regarded as clinically acceptable. This could help determine how much degradation is acceptable for clinical success.
Collapse
Affiliation(s)
- Ricardo M Carvalho
- Department of Oral Biological and Medical Sciences, Division of Biomaterials, University of British Columbia, Vancouver, Canada.
| | | | | | | | | |
Collapse
|
43
|
Tezvergil-Mutluay A, Mutluay MM, Agee KA, Seseogullari-Dirihan R, Hoshika T, Cadenaro M, Breschi L, Vallittu P, Tay FR, Pashley DH. Carbodiimide cross-linking inactivates soluble and matrix-bound MMPs, in vitro. J Dent Res 2011; 91:192-6. [PMID: 22058118 DOI: 10.1177/0022034511427705] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Matrix metalloproteinases (MMPs) cause collagen degradation in hybrid layers created by dentin adhesives. This in vitro study evaluated the feasibility of using a cross-linking agent, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC), to inactivate soluble rhMMP-9, as an example of dentin MMPs, and matrix-bound dentin proteases. The inhibitory effects of 5 EDC concentrations (0.01-0.3 M) and 5 incubation times (1-30 min) on soluble rhMMP-9 were screened with an MMP assay kit. The same EDC concentrations were used to evaluate their inhibitory effects on endogenous proteinases from completely demineralized dentin beams that were incubated in simulated body fluid for 30 days. Decreases in modulus of elasticity (E) and dry mass of the beams, and increases in hydroxyproline content of hydrolysates derived from the incubation medium were used as indirect measures of matrix collagen hydrolysis. All EDC concentrations and pre-treatment times inactivated MMP-9 by 98% to 100% (p < 0.05) compared with non-cross-linked controls. Dentin beams incubated in 0.3 M EDC showed only a 9% decrease in E (45% decrease in control), a 3.6% to 5% loss of dry mass (18% loss in control), and significantly less solubilized hydroxyproline when compared with the control without EDC cross-linking (p < 0.05). It is concluded that EDC application for 1 min may be a clinically relevant and effective means for inactivating soluble rhMMP-9 and matrix-bound dentin proteinases if further studies demonstrate that EDC is not toxic to pulpal tissues.
Collapse
Affiliation(s)
- A Tezvergil-Mutluay
- Department of Prosthodontics, University of Turku, Institute of Dentistry, Lemminkaisenkatu 2, FI-20520 Turku, Finland.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Orsini G, Mazzoni A, Orciani M, Putignano A, Procaccini M, Falconi M, Pashley DH, Tay FR, Breschi L. Matrix metalloproteinase-2 expression induced by two different adhesive systems on human pulp fibroblasts. J Endod 2011; 37:1663-7. [PMID: 22099901 DOI: 10.1016/j.joen.2011.07.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 07/14/2011] [Indexed: 10/17/2022]
Abstract
INTRODUCTION This study evaluated the expression of matrix metalloproteinase-2 (MMP-2) in primary cultures of human pulp fibroblasts (HPFs) when exposed to extracts from dentin-bonding systems. METHODS Polymerized resin disks of the bonding agent of a 2-step self-etch adhesive (TechBond, Isasan, Rovello Porro, Italy) or of the primer/bonding agent a 2-step etch-and-rinse adhesive (Optibond Solo; Sybron-Kerr, Orange, CA) were immersed in HPF culture medium for 24 or 96 hours. HPFs were incubated in the adhesive-conditioned or control (untreated) culture medium for 24 hours. Western blot and immunofluorescence analyses were performed to assay MMP-2 expression. RESULTS MMP-2 expression levels in HPFs cultured for 24 hours in culture medium were similar in both the control and experimental media groups showing a faint band at 67 kDa. Conversely, the HPFs incubated in the medium that contain polymerized resin disks for 96 hours showed increased MMP-2 expression compared with the untreated medium. The self-etch adhesive displayed the most pronounced induction of MMP-2 expression. These findings were confirmed by immunofluorescence analysis. CONCLUSIONS HPFs display increased MMP-2 expression after 96 hours of conditioning of the HPF culture medium with polymerized disks of dentin bonding systems. This MMP-2 expression/activation may represent a defence mechanism exhibited by HPFs towards monomers eluted from the dentin bonding systems.
Collapse
Affiliation(s)
- Giovanna Orsini
- Department of Clinical Sciences and Stomatology, Marche Polytechnic University, Ancona, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Osorio R, Yamauti M, Osorio E, Román JS, Toledano M. Zinc-doped dentin adhesive for collagen protection at the hybrid layer. Eur J Oral Sci 2011; 119:401-10. [DOI: 10.1111/j.1600-0722.2011.00853.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
46
|
Osorio R, Yamauti M, Osorio E, Ruiz-Requena ME, Pashley D, Tay F, Toledano M. Effect of dentin etching and chlorhexidine application on metalloproteinase-mediated collagen degradation. Eur J Oral Sci 2011; 119:79-85. [PMID: 21244516 DOI: 10.1111/j.1600-0722.2010.00789.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Dentin matrix metalloproteinases (MMPs) are involved in the degradation of collagen in resin-dentin interfaces. This study evaluated whether collagen degradation can be prevented by chlorhexidine digluconate (CHX) after different dentin demineralization procedures. The demineralization of human dentin was performed with phosphoric acid (PA), EDTA or acidic monomers (Clearfil SE Bond and Xeno V). Specimens were stored (for 24 h, or for 1 or 3 wk) in the presence or absence of CHX. In half of the groups, active MMP-2 was incorporated into the storage solution. At the end of each storage period, the C-terminal telopeptide (ICTP) concentration (which indicates the amount of collagen degradation) was measured in the storage solution. Collagen degradation was higher in PA- and EDTA-demineralized dentin. Chlorhexidine digluconate reduced collagen degradation in these groups only for 24 h. When dentin was demineralized with Clearfil SE Bond or Xeno V, collagen degradation was reduced by up to 30%, but the addition of exogenous MMP-2 significantly increased collagen degradation. In self-etchant-treated dentin, the inhibitory effect of CHX on MMPs lasted for up to 3 wk. Treating dentin with EDTA, PA or self-etching agents produces enough demineralization to permit cleavage of the exposed collagen. Monomer infiltration may exert protection on demineralized collagen, probably through immobilization of MMPs. The partial inhibitory action of CHX on MMP activity produced by self-etching adhesives was prolonged compared with the short-acting PA- or EDTA-treated dentin.
Collapse
Affiliation(s)
- Raquel Osorio
- Department of Dental Materials, School of Dentistry, University of Granada, Granada, Spain.
| | | | | | | | | | | | | |
Collapse
|
47
|
Cecchin D, de Almeida JFA, Gomes BPFA, Zaia AA, Ferraz CCR. Effect of chlorhexidine and ethanol on the durability of the adhesion of the fiber post relined with resin composite to the root canal. J Endod 2011; 37:678-83. [PMID: 21496670 DOI: 10.1016/j.joen.2011.01.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 01/11/2011] [Accepted: 01/15/2011] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The aim of this study was to investigate the effects of pretreatment of gel chlorhexidine and ethanol on the bond strength and durability of the adhesion of the fiber post relined with resin composite to the root dentin. METHODS Sixty bovine incisor roots were divided into four groups: irrigation with physiologic solution (control), 5 minutes with chlorhexidine, 1 minute with ethanol, and 5 minutes with chlorhexidine followed by 1 minute with ethanol. Fiber posts relined with resin composite were cemented with RelyX ARC (3M ESPE, St Paul, MN) and a self-etching adhesive system Clearfil SE Bond (Kuraray, Kurashiki, Japan). Each group was randomly divided into three subgroups: 24 hours of water storage, 12 months of water storage, and 12 months of oil storage. All roots were sectioned transversely in the coronal, middle, and apical regions, producing 1-mm thick slices, and the push-out test was performed. Statistical analysis was performed using analysis of variance and the Tukey test for post hoc comparisons (α = 0.05). RESULTS Immediate groups showed similar bond strength values with or without chlorhexidine and/or ethanol pretreatment (P > .05). A significant decrease in the bond strength in the control group was observed after 12 months of storage in water and oil (P < .05). The use of chlorhexidine- and/or ethanol-preserved bond strength in the groups stored in water and oil for 12 months (P < .05). CONCLUSIONS Chlorhexidine and/or ethanol pretreatment were capable of preserving the bond strength of the fiber post relined with resin composite to root dentin for 12 months.
Collapse
Affiliation(s)
- Doglas Cecchin
- Department of Restorative Dentistry, State University of Campinas, Piracicaba, Brazil.
| | | | | | | | | |
Collapse
|
48
|
Liu Y, Tjäderhane L, Breschi L, Mazzoni A, Li N, Mao J, Pashley DH, Tay FR. Limitations in bonding to dentin and experimental strategies to prevent bond degradation. J Dent Res 2011; 90:953-68. [PMID: 21220360 DOI: 10.1177/0022034510391799] [Citation(s) in RCA: 421] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The limited durability of resin-dentin bonds severely compromises the lifetime of tooth-colored restorations. Bond degradation occurs via hydrolysis of suboptimally polymerized hydrophilic resin components and degradation of water-rich, resin-sparse collagen matrices by matrix metalloproteinases (MMPs) and cysteine cathepsins. This review examined data generated over the past three years on five experimental strategies developed by different research groups for extending the longevity of resin-dentin bonds. They include: (1) increasing the degree of conversion and esterase resistance of hydrophilic adhesives; (2) the use of broad-spectrum inhibitors of collagenolytic enzymes, including novel inhibitor functional groups grafted to methacrylate resins monomers to produce anti-MMP adhesives; (3) the use of cross-linking agents for silencing the activities of MMP and cathepsins that irreversibly alter the 3-D structures of their catalytic/allosteric domains; (4) ethanol wet-bonding with hydrophobic resins to completely replace water from the extrafibrillar and intrafibrillar collagen compartments and immobilize the collagenolytic enzymes; and (5) biomimetic remineralization of the water-filled collagen matrix using analogs of matrix proteins to progressively replace water with intrafibrillar and extrafibrillar apatites to exclude exogenous collagenolytic enzymes and fossilize endogenous collagenolytic enzymes. A combination of several of these strategies should result in overcoming the critical barriers to progress currently encountered in dentin bonding.
Collapse
Affiliation(s)
- Y Liu
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou District, Wuhan 430030, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Osorio R, Yamauti M, Osorio E, Ruiz-Requena ME, Pashley DH, Tay FR, Toledano M. Zinc reduces collagen degradation in demineralized human dentin explants. J Dent 2010; 39:148-53. [PMID: 21108986 DOI: 10.1016/j.jdent.2010.11.005] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 10/22/2010] [Accepted: 11/16/2010] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVES Dentin matrix metalloproteinases are implicated in the pathogenesis of caries and contribute to collagen degradation in resin-dentin interfaces. The objective was to determine if collagen degradation may be modulated by an excess of zinc or zinc chelators. METHODS Mineralized and phosphoric acid demineralized human dentin specimens were tested. Chlorhexidine digluconate, doxycycline or ZnCl₂ were added to the media. In half of the groups, active exogenous metalloproteinase-2 was incorporated into the solution. C-terminal telopeptide determinations (radioimmunoassay) were performed after 24 h, 1 and 3 weeks. RESULTS Collagen degradation was prominent in demineralized dentin. Doxycycline fully blocked dentin proteolysis. Chlorhexidine digluconate reduced the degradation at the 24-h period. Zinc in excess strongly inhibits hydrolysis of collagen and its effect was maintained for 3 weeks. CONCLUSIONS Zinc in excess reduces MMP-mediated collagen degradation. The hypothesis that binding of zinc to collagen results in protection of sensitive cleavage sites of metalloproteinases requires further validation.
Collapse
Affiliation(s)
- R Osorio
- Department of Dental Materials, School of Dentistry, Campus de Cartuja s/n, University of Granada, E-18071 Granada, Spain.
| | | | | | | | | | | | | |
Collapse
|
50
|
Dündar M, Özcan M, Çömlekoğlu M, Şen B. Nanoleakage Inhibition Within Hybrid Layer Using New Protective Chemicals and Their Effect on Adhesion. J Dent Res 2010; 90:93-8. [DOI: 10.1177/0022034510382547] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hybrid-layer degradation occurs because of acidic properties of currently used adhesive systems. Titanium tetrafluoride couples with tooth surface, and titanium compounds are not substituted. Caffeic acid phenethyl esther inhibits endogenous matrix metalloproteinases that cause hybrid-layer degradation. It was hypothesized that titanium tetrafluoride and caffeic acid phenethyl esther application on exposed dentine surfaces before adhesive applications would inhibit nanoleakage and hybrid-layer degradation without compromising the bond strength of the adhesives. In ultracut thin sections, human dentine–chemical agent–adhesive composite interfaces were observed under transmission electron microscope with complementary scanning electron microscopy. Microtensile bond strength tests were also accomplished. Titanium tetrafluoride and titanium tetrafluoride + caffeic acid phenethyl esther applications decreased bond strength values. Caffeic acid phenethyl esther showed decreased silver nitrate penetration for cements based on Bisphenol glycydilmethacrylate and methyl methacrylate, whereas cement based on 4-methacryloyloxyethyl trimellitate anhydride methyl methacrylate showed almost no infiltration. Caffeic acid phenethyl esther application before cementation could inhibit nanoleakage and biodegradation of the hybrid layer.
Collapse
Affiliation(s)
- M. Dündar
- Department of Prosthodontics, School of Dentistry, University of Ege, İzmir, Turkey
| | - M. Özcan
- Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Dental Materials Unit, Center for Dental and Oral Medicine, University of Zurich, Zurich, Switzerland
| | - M.E. Çömlekoğlu
- Department of Prosthodontics, School of Dentistry, University of Ege, İzmir, Turkey
| | - B.H. Şen
- Ege University School of Dentistry, Izmir, Turkey
| |
Collapse
|