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Liu T, Xie H, Chen C. A comparison of different cleaning approaches for blood contamination after curing universal adhesives on the dentine surface. Dent Mater 2024:S0109-5641(24)00234-3. [PMID: 39129078 DOI: 10.1016/j.dental.2024.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 07/25/2024] [Accepted: 07/31/2024] [Indexed: 08/13/2024]
Abstract
OBJECTIVE This study compared the effectiveness of various cleaning approaches, including spray rinsing, repreparing with diamond burs, and using phosphoric acid or sodium hypochlorite alone or with polyphenols (resveratrol or myricetin), in removing blood contamination from the dentine after adhesive light-curing. METHODS The contact angles of the treated surfaces were measured and scanning electron microscopy/ energy dispersive X-ray spectroscopy observation was performed. The bond strength and nanoleakage were assessed, and in situ zymography was performed before and after aging. Interactions between matrix metalloproteinase (MMP)-9 and polyphenols were evaluated using molecular dynamics and rhMMP-9 inhibition analyses. The destruction of sodium hypochlorite on collagen and the resistance of polyphenols-treated dentine collagen to enzymolysis were evaluated using the hydroxyproline (HYP) assay. The effect of polyphenols on dentine collagen crosslinking was assessed by Fourier Transform Infrared Spectroscopy. RESULTS The repreparation group had the lowest contact angle compared to the other groups. The spray rinsing group had the lowest bond strength and highest amounts of nanoleakage. Cleaning with phosphoric acid or sodium hypochlorite alone removed the blood contaminants and parts of the adhesive; moreover, applying polyphenols further improved the bond strength and decreased nanoleakage and MMP activity after aging. Both polyphenols inhibited rhMMP-9 activity and promoted collagen crosslinking. Sodium hypochlorite showed the maximum HYP release when used alone, which was decreased after adding polyphenols. SIGNIFICANCE Phosphoric acid or sodium hypochlorite cleaning can remove blood contamination from the dentine surface after adhesive curing, and the addition of polyphenols can improve the durability of dentine bonding.
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Affiliation(s)
- Ting Liu
- Department of Endodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China; State Key Laboratory Cultivation Base of Research, Prevention and Treatment for Oral Diseases, Nanjing 210029, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Haifeng Xie
- State Key Laboratory Cultivation Base of Research, Prevention and Treatment for Oral Diseases, Nanjing 210029, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China; Department of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Chen Chen
- Department of Endodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China; State Key Laboratory Cultivation Base of Research, Prevention and Treatment for Oral Diseases, Nanjing 210029, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China.
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Romano LK, Soares EJ, Alves Amorim A, Geng Vivanco R, Pires-de-Souza FDCP. Effect of natural agents on the bond strength to eroded dentin. J ESTHET RESTOR DENT 2024; 36:770-777. [PMID: 38014602 DOI: 10.1111/jerd.13172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/29/2023]
Abstract
OBJECTIVE This study evaluated the effect of bromelain and propolis extract on the bond strength (BS) of a universal adhesive system to eroded dentin. MATERIALS AND METHODS Sixty human molars with exposed dentin were halved, with one half protected by composite resin and the other subjected to erosive treatment followed by remineralization. After the erosive treatment, the composite resin was removed, and the teeth were randomly assigned to three groups (n = 20): Adhesive-Control System; Br-10%; Pr-16%. Following the treatments, composite resin blocks were built on the dentin surfaces and sticks of 0.9 mm2 were obtained and stored in distilled water at 37°C for 24 h and 6 months. After these periods, the sticks underwent bond strength testing and the data were analyzed using 2-way ANOVA, Bonferroni test, p < 0.05. Fracture patterns were observed using light microscope and scanning electron microscopy. RESULTS Irrespective of the substrate and aging duration, propolis demonstrated higher BS (p < 0.05) compared to the other treatments. Eroded dentin exhibited greater removal of the smear layer and dentinal tubules with a larger diameter than sound dentin, especially when treated with bromelain, resulting in the formation of resin tags. CONCLUSIONS Propolis consistently promoted the highest bond strength, irrespective of aging or substrate. Eroded dentin treated with propolis, or bromelain exhibited a higher prevalence of non-adhesive fractures and resin tag formation. CLINICAL SIGNIFICANCE Propolis shows promise for enhancing the longevity of adhesive restorations in eroded dentin due to its ability to promote high bond strength.
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Affiliation(s)
- Laryssa Karla Romano
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Eduardo José Soares
- Department of Pediatric Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Ayodele Alves Amorim
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Rocio Geng Vivanco
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
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Li Q, Huang G, Li A, Qiu D, Dong Y. Promoting bond durability by a novel fabricated bioactive dentin adhesive. J Dent 2024; 143:104905. [PMID: 38428716 DOI: 10.1016/j.jdent.2024.104905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/03/2024] Open
Abstract
OBJECTIVE To prepare a bioactive dentin adhesive and investigate its effect on promoting bonding durability of dentin. METHODS The mineralization of the bioactive glass with high phosphorus (10.8 mol% P2O5-54.2 mol% SiO2-35 mol% CaO, named PSC) and its ability to induce type I collagen mineralization were observed by SEM and TEM. The Control-Bond and the bioactive dentin adhesive containing 20 wt% PSC particles (PSC-Bond) were prepared, and their degree of conversion (DC), microtensile bond strength (μTBS), film thickness and mineralization performance were evaluated. To evaluate the bonding durability, dentin bonding samples were prepared by Control-Bond and PSC-Bond, and mineralizated in simulated body fluid for 24 h, 3 months, and 6 months. Then, the long-term bond strength and microleakage at the adhesive interface of dentin bonding samples were evaluated by microtensile testing and semiquantitative ELIASA respectively. RESULTS The PSC showed superior mineralization at 24 h and induced type I collagen mineralization to some extent under weakly alkaline conditions. For PSC-Bond, DC was 62.65 ± 1.20%, μTBS was 39.25 ± 4.24 MPa and film thickness was 17.00 ± 2.61 μm. PSC-Bond also formed hydroxyapatite and maintained good mineralization at the bonding interface. At 24 h, no significant differences in μTBS and interface microleakage were observed between the Control-Bond and PSC-Bond groups. After 6 months of aging, the μTBS was significantly higher and the interface microleakage was significantly lower of PSC-Bond group than those of Control-Bond group. SIGNIFICANCE PSC-Bond maintained bond strength stability and reduced interface microleakage to some extent, possibly reducing the occurrence of secondary caries, while maintaining long-term effectiveness of adhesive restorations.
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Affiliation(s)
- Qiuju Li
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, China
| | - Guibin Huang
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, China
| | - Ailing Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Dong Qiu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Yanmei Dong
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Nandajie, Haidian District, Beijing 100081, China.
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Geng Vivanco R, Sousa ABS, Oliveira VDDC, Sinhoreti MAC, Pires-de-Souza FDCP. Effect of the use of bromelain associated with bioactive glass-ceramic on dentin/adhesive interface. Clin Oral Investig 2024; 28:106. [PMID: 38244108 DOI: 10.1007/s00784-024-05496-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/06/2024] [Indexed: 01/22/2024]
Abstract
OBJECTIVES To evaluate the effect of bromelain associated with Biosilicate on the bond strength (BS) of a universal adhesive system to sound (SD) and caries-affected dentin (CAD), and on the proteolytic activity. MATERIALS AND METHODS Cavities were prepared in 360 molars, half submitted to cariogenic challenge. Teeth were separated into groups (n=20): Control-No treatment; CHX-0.12% chlorhexidine; NaOCl-5% sodium hypochlorite; Br5%-5% bromelain; Br10%-10% bromelain; Bio-10% Biosilicate; NaOClBio-NaOCl+Bio; Br5%Bio-Br5%+Bio; Br10%Bio-Br10%+Bio. Following treatments, the adhesive system was applied, and cavities were restored. Samples were sectioned into sticks and stored at 37 °C for 24 h, 6 months, and 1 year. Microtensile BS (2-way ANOVA, Bonferroni's test, α=0.05), fracture patterns (SEM), and adhesive interfaces (TEM) were evaluated. Bacterial collagenase assay and in situ zymography were performed. RESULTS In CAD, Br10% presented higher BS (p=0.0208) than Br5%Bio. Br5% presented higher BS (p=0.0033) after 6 months than after 24 h; and association of treatments, higher BS (p<0.05) after aging than after 24 h. Mixed fractures were the most prevalent. Association of treatments promoted a more uniform hybrid layer with embedded Bio particles. Experimental groups presented lower (p<0.0001) relative fluorescence units than Control. Bromelain, associated or not with Bio, showed collagenolytic degradation. CONCLUSIONS Bromelain associated with Biosilicate did not affect the BS to SD. In CAD, Br5%Bio decreased immediate BS but had no long-term influence. This association decreased the proteolytic activity. CLINICAL RELEVANCE Bromelain and Biosilicate may enhance the longevity of adhesive restorations by inhibiting endogenous proteases.
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Affiliation(s)
- Rocio Geng Vivanco
- Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Abreu JD, Silva SDO, Amorim AA, José Soares E, Geng-Vivanco R, Arruda CNFD, Pires-de-Souza FDCP. Incorporation of bioactive glass-ceramic into coconut oil for remineralization of incipient carious lesions. Braz Dent J 2023; 34:82-90. [PMID: 38133095 PMCID: PMC10742351 DOI: 10.1590/0103-6440202305636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
This study evaluated the efficacy of incorporating different concentrations of bioactive glass-ceramic (Biosilicate) into coconut oil on the remineralizing potential and surface roughness of white spot lesions. Fragments (6 x 6 x 2mm) of bovine teeth were sectioned and initial microhardness (KHN) and surface roughness (Ra) readings were obtained. The samples were submitted to cariogenic challenge to form white spot lesions and were separated into six groups (n=13): 1) Artificial Saliva (AS); 2) Coconut Oil (CO); 3) CO+2% Biosilicate (CO+2%Bio); 4) CO+5% Biosilicate (CO+5%Bio); 5) 2% Biosilicate Suspension (2% Bio) and 6) 5% Biosilicate Suspension (5% Bio). The treatments for 1 cycle/day were: immersion into the treatments for 5 minutes, rinsing in distilled water, and storage in artificial saliva at 37ºC. After 14 days, KHN and Ra readings were taken. The surface roughness alteration ((Ra) was analyzed (Kruskal-Wallis, Dunn's post-test, p<0.05). CO+2%Bio had higher (p = 0.0013) (Ra followed by CO+5%Bio (p = 0.0244) than AS. The relative KHN and remineralization potential were analyzed (ANOVA, Tukey, p<0.05), and 5% Bio treatment presented a higher relative microhardness than all other groups (p>0.05). The remineralizing potential of all the treatments was similar (p > .05). When Biosilicate was added, the pH of the suspensions increased and the alkaline pH remained during the analysis. Biosilicate suspension is more efficient than the incorporation of particles into coconut oil at white spot lesion treatment. In addition to the benefits that coconut oil and Biosilicate present separately, their association can enhance the remineralizing potential of Biosilicate.
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Affiliation(s)
- Jessica Dantas Abreu
- Department of Pediatric Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, 14040-904 Ribeirão Preto, Brazil
| | - Stéphanie de Oliveira Silva
- Department of Pediatric Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, 14040-904 Ribeirão Preto, Brazil
| | - Ayodele Alves Amorim
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, 14040-904 Ribeirão Preto, Brazil
| | - Eduardo José Soares
- Department of Pediatric Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, 14040-904 Ribeirão Preto, Brazil
| | - Rocio Geng-Vivanco
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, 14040-904 Ribeirão Preto, Brazil
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Garcia Pinto AH, Geng-Vivanco R, Pires-de-Souza FDCP. Effect of limonene associated with bioactive glass-ceramic on dentin/adhesive interface. Eur J Oral Sci 2023; 131:e12947. [PMID: 37501189 DOI: 10.1111/eos.12947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/15/2023] [Indexed: 07/29/2023]
Abstract
This study evaluated the effect of pretreatment with limonene and/or biosilicate on the bond strength of a universal adhesive system in self-etch mode to dentin. Occlusal cavities were prepared in 80 human molars and the teeth were randomly allocated to one of four groups (n = 20), according to the pretreatment regimens applied before the adhesive. The pretreatments were (i) Control, no pretreatment, (ii) LIM, 0.5% limonene; (iii) Bio, 10% biosilicate; and (iv) LIMBio, LIM + Bio. After adhesive application and restoration, the specimens were sectioned into sticks, separated, and stored in distilled water at 37°C for 24 h or 6 months. Microtensile bond strength test was carried out and measurements were compared across pretreatment groups and storage times. Fracture patterns and adhesive interfaces were observed. Loss of dry mass was calculated (n = 10). There was no statistically significant difference in the bond strength between the groups and the most prevalent fracture pattern was the non-adhesive. LIM and LIMBio resulted in more open dentinal tubules. LIM and Bio, whether separate or combined, showed particles of those substances, which decreased in size and number after 6 months. All groups lost mass weight after treatment, with no statistically significant differences between them. Limonene and biosilicate pretreatment did not affect the bond strength to dentin of the universal adhesive system, but resulted in more non-adhesive fractures, even after 6 months.
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Affiliation(s)
- Arthur Henrique Garcia Pinto
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rocio Geng-Vivanco
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
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Wang S, Meng Y, Zhang Y, Huang F, Teng R, Lu Y, Li A, Sun J, Pei D. Influence of calcium-based desensitizing toothpastes on the bonding performance of universal adhesive. Microsc Res Tech 2023; 86:402-413. [PMID: 36575979 DOI: 10.1002/jemt.24280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 10/20/2022] [Accepted: 12/11/2022] [Indexed: 12/29/2022]
Abstract
The study evaluated the effect of calcium-based desensitizing toothpastes on the dentinal tubule occlusion and its influence on the dentin bond strength of universal adhesive. Mid-coronal dentin samples were prepared for hypersensitivity model and treated by the following calcium-based desensitizing toothpastes: no treatment (Control), Clinpro (fTCP), Pro-Relief (Pro-Argin), and Repair & Protect (Novamin). Single Bond Universal adhesive was applied in self-etch or etch-and-rinse mode. The dentinal tubule occlusion and adhesion interface were evaluated under scanning electron microscope (SEM). A double-fluorescence technique was used to examine interfacial permeability under confocal laser scanning microscopy (CLSM). The micro-tensile bond strength (μTBS) was employed, followed by the fracture interface observation. SEM showed the toothpastes occluded dentinal tubules, and the occlusion exhibited stability against acid and abrasion. Hindered resin infiltration was observed in the adhesion interface after desensitization. CLSM showed more water permeation within or under the adhesion interface in etch-and-rinse mode than self-etch mode. Desensitization decreased the μTBS in self-etch mode. When using etch-and-rinse mode, the desensitized samples presented similar μTBS to the control group. No difference in μTBS was found between the two bonding modes, except for the control group. Calcium-based desensitizing toothpastes can effectively occlude the exposed dentinal tubules with acid-resistant and abrasion-resistant stability. The desensitization reduced the dentin bond strength of the universal adhesive system in self-etch mode but did not affect the bond strength of etch-and-rinse mode.
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Affiliation(s)
- Silin Wang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Yuchen Meng
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Yuchen Zhang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Fan Huang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Rui Teng
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Yi Lu
- Department of Prosthodontics, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Ang Li
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Junyi Sun
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - Dandan Pei
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
- Department of Prosthodontics, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
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Berton F, Rapani A, Zotti M, Stacchi C, Berton T, Porrelli D. Presence of microbrush remnants on the adhesion surface: A microscopical analysis. J Dent 2022; 127:104320. [PMID: 36220516 DOI: 10.1016/j.jdent.2022.104320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/14/2022] [Accepted: 10/07/2022] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES the aim of this ex vivo report was to evaluate, on a microscopical analysis, the presence of microbrush remnants on in the adhesive surface in extracted teeth. METHODS Twenty extracted teeth were divided into four groups. Half of the teeth were prepared as Class I cavities, whereas the other half as Class II cavities, according to Black classification. The teeth were conditioned with primer and bonding, both applied with microbrushes. Each of these groups was divided into halves, and the two sub-groups received a polymerization process or not, respectively. The teeth were then analyzed by scanning electron microscopy working in environmental mode. RESULTS All of the analyzed surfaces (100%) showed the presence of residual bristles on the adhesion surface. CONCLUSIONS Microscopical analysis showed the presence of residual bristles in the 100% of the surfaces treated with Black Classes I and II cavities. Further studies are necessary to evaluate the influence of this factor on the adhesion strength and capacity. CLINICAL SIGNIFICANCE Clinician should be aware of the realistic possibility of the presence of bristles belonging to disposable applicators in the adhesive interface of Black's class I and II cavities. The impact of these remnants has still to be ascertained.
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Affiliation(s)
- Federico Berton
- Maxillofacial and Dental Surgical Clinic, Department of Medical, Surgical and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34125, Trieste, Italy.
| | - Antonio Rapani
- Maxillofacial and Dental Surgical Clinic, Department of Medical, Surgical and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34125, Trieste, Italy
| | - Matteo Zotti
- Maxillofacial and Dental Surgical Clinic, Department of Medical, Surgical and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34125, Trieste, Italy
| | - Claudio Stacchi
- Maxillofacial and Dental Surgical Clinic, Department of Medical, Surgical and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34125, Trieste, Italy
| | - Tiziano Berton
- Private practice at Studi Odontoiatrici Berton, Treviso, Belluno, Italy
| | - Davide Porrelli
- Maxillofacial and Dental Surgical Clinic, Department of Medical, Surgical and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34125, Trieste, Italy
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Conti GB, de Lima Oliveira RF, Amorim AA, de Oliveira HF, Pires-de-Souza FDCP, de Queiroz AM. Color stability and microhardness alteration of irradiated dental enamel treated with a high fluoride concentration toothpaste. Clin Oral Investig 2022; 26:5885-5892. [PMID: 35590118 DOI: 10.1007/s00784-022-04546-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/08/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Radiotherapy (RT) is a kind of head and neck cancer (HNC) treatment, which is associated to the habit of smoking and can develop collateral effects in the oral cavity, such as the increase of caries prevalence. This study evaluated the color alteration, the microhardness, and the remineralizing potential of high fluoride concentration toothpastes on irradiated teeth. MATERIALS AND METHODS Forty bovine teeth were used (6 × 6 × 2 mm) and after color (EasyShade, VITA) and microhardness initial readings were separated into two groups: exposed to cigarette smoke and non-exposed. All samples were submitted to RT (30 Gy) and to cariogenic challenge. New color and microhardness readings were done. After RT (60 Gy), the samples were submitted to simulated toothbrushing (73,000 cycles = 5 years of brushing) with two different toothpastes: conventional (1450 ppm) and high fluoride concentration (5000 ppm). Final color and microhardness readings were done after brushing. Data were analyzed with 2-way ANOVA with repeated measures and Tukey's test (p < .05). RESULTS There was no color difference after RT, nor after brushing (p > .05). However, after brushing, microhardness values increased for the samples treated with high fluoride concentration toothpaste (p < .05). CONCLUSION Radiotherapy did not influence the teeth color, and the high fluoride concentration toothpaste presented remineralizing potential; therefore, it could be used on the caries prevention related to HNC radiation. CLINICAL RELEVANCE Considering its remineralizing potential, toothpastes with high fluoride concentration could be a proper alternative for caries prevention in patients undergoing radiotherapy.
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Affiliation(s)
- Giulia Battistini Conti
- Department of Pediatric Dentistry, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Av. do Café, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil
| | - Rebeca Franco de Lima Oliveira
- Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Av. do Cafe, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil
| | - Ayodele Alves Amorim
- Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Av. do Cafe, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil
| | | | - Fernanda de Carvalho Panzeri Pires-de-Souza
- Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Av. do Cafe, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil.
- Faculty of Dentistry of Ribeirao Preto, University of Sao Paulo, Av. do Cafe, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil.
| | - Alexandra Mussolino de Queiroz
- Department of Pediatric Dentistry, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Av. do Café, s/nº, Monte Alegre, 14040-904, Ribeirão Preto, Brazil
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Ferreira AC, de Lima Oliveira RF, Amorim AA, Geng-Vivanco R, de Carvalho Panzeri Pires-de-Souza F. Remineralization of caries-affected dentin and color stability of teeth restored after treatment with silver diamine fluoride and bioactive glass-ceramic. Clin Oral Investig 2022; 26:4805-4816. [PMID: 35301597 DOI: 10.1007/s00784-022-04445-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 03/08/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the microhardness of caries-affected dentin and color stability of teeth restored after treatments with silver diamine fluoride (SDF) associated to potassium iodide (KI) and Biosilicate. MATERIAL AND METHODS Different samples from bovine teeth were obtained. For color readings, 80 cavities (6 mm × 6 mm × 2 mm) were prepared, and for microhardness, teeth were flattened into dentine to obtain 40 samples. All samples were submitted to cariogenic challenge and separated in 4 groups, according to the treatment used: 12% SDF + KI; 38% SDF; Biosilicate and control (no treatment). Cavities were restored with resin-modified glass-ionomer cement (RMGIC, Vitremer, 3 M ESPE) or composite resin (CR, Z350, 3 M ESPE). After restoration, the samples were submitted to thermo-mechanical cycling (TMC) for 1,200,000 cycles. Color readings (EasyShade, Vita) were performed after restorations, after TMC, and 30 days after TMC. Knoop microhardness was evaluated on the planned samples before and after cariogenic challenge, after treatments, and after 30 days. Scanning electron microscopy (SEM) evaluated the dentine surface after treatments. Data were analyzed (ANOVA, Bonferroni, p < .05). RESULTS The results showed a higher color alteration for RMGIC than CR. The time of analysis was significant (p < .05) for the 12% SDF + KI and control group. There was no difference (p < .05) in microhardness between groups. However, there was evidence of dentin remineralization after treatments. CONCLUSIONS It was concluded that the samples treated with Biosilicate resulted in a color alteration similar to control. The treatments presented dentin remineralizing potential for microhardness, below the demineralization level, caused by the cariogenic challenge. CLINICAL RELEVANCE Considering the remineralizing potential presented by Biosilicate, this agent is a promising alternative that overcomes the SDF adverse effects such as tooth staining.
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Affiliation(s)
- Adriana Cavalcanti Ferreira
- Department of Dental Materials and Prosthodontics, Universidade de São Paulo/Faculdade de Odontologia de Ribeirão Preto, Av do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | - Rebeca Franco de Lima Oliveira
- Department of Dental Materials and Prosthodontics, Universidade de São Paulo/Faculdade de Odontologia de Ribeirão Preto, Av do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | - Ayodele Alves Amorim
- Department of Dental Materials and Prosthodontics, Universidade de São Paulo/Faculdade de Odontologia de Ribeirão Preto, Av do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | - Rocio Geng-Vivanco
- Department of Dental Materials and Prosthodontics, Universidade de São Paulo/Faculdade de Odontologia de Ribeirão Preto, Av do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | - Fernanda de Carvalho Panzeri Pires-de-Souza
- Department of Dental Materials and Prosthodontics, Universidade de São Paulo/Faculdade de Odontologia de Ribeirão Preto, Av do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil.
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Bonding Performance of Universal Adhesives Applied to Nano-Hydroxyapatite Desensitized Dentin Using Etch-and-Rinse or Self-Etch Mode. MATERIALS 2021; 14:ma14164746. [PMID: 34443268 PMCID: PMC8398634 DOI: 10.3390/ma14164746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/12/2021] [Accepted: 08/20/2021] [Indexed: 11/16/2022]
Abstract
The study assessed the bonding performance of three universal adhesives on desensitized dentin with etch-and-rinse mode or self-etch mode after nano-hydroxyapatite (nHAp)-based desensitizers application. Simulated sensitive dentin specimens were prepared and separated into four groups: no treatment as the negative control, groups desensitized by Biorepair toothpaste, Dontodent toothpaste, or nHAp paste. Three universal adhesives of All-Bond Universal, Single Bond Universal, and Clearfil Universal Bond with etch-and-rinse or self-etch mode were bonded to the desensitized dentin specimens separately, followed by resin composite build-ups. Micro-tensile bond strength was measured using a micro-tensile tester. The wettability of desensitized dentin was evaluated by the contact angle of the adhesives. Resin infiltration was observed by confocal laser scanning microscopy. Dentin tubular occlusion and nanoleakage were observed by scanning electron microscope. The results showed that the etch-and-rinse or self-etch mode of each adhesive showed similar bond strength when bonding to nHAp-based desensitized dentin. The dentin surface was partially covered by desensitizers after desensitization. Compared with the self-etch mode, stronger demineralization and more reopened dentin tubules were observed in the etch-and-rinse mode after acid etching; longer resin tags and more nanoleakage in the resin-dentin interface were observed when using the etch-and-rinse mode. When bonding to nHAp-based desensitized dentin with universal adhesives, no significant difference in bond strength was found between self-etch mode or etch-and-rinse mode; while the latter produced more nanoleakage in the resin-dentin interfaces.
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