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Ahmed B, Hamama HH, Mahmoud SH. Microshear Bond Strength of Bioactive Materials to Dentin and Resin Composite. Eur J Dent 2023; 17:917-923. [PMID: 36307111 PMCID: PMC10569854 DOI: 10.1055/s-0042-1756692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
OBJECTIVES The aim of this study was to comparatively evaluate microshear bond strength (μSBS) of bioactive ionic resin composite and resin-modified glass ionomer liner (RMGI) to dentin and resin composite. MATERIALS AND METHODS The enamel of 11 posterior molar teeth was removed to expose dentin and then placed in acrylic blocks. Each specimen received three microcylindrical Tygon tubes filled with bioactive ionic resin composite (Activa Bioactive base/liner (PULPDENT: , MA, USA)), RMGI (Riva light cure SDI LTD, Bayswater, Australia), and resin composite (Filtek Z350xt, MN, USA). Composite discs (n = 11) were fabricated from nanofilled resin composite (Filtek Z350xt) and then fixed in acrylic blocks. Each specimen received two microcylindrical Tygon tubes filled with Activa Bioactive base/liner and Riva RMGI. All specimens were mounted individually to universal testing machine for μSBS test. Failure modes were analyzed using stereomicroscope and scanning electron microscope. RESULTS Filtek Z350xt nanofilled resin composite showed the highest μSBS values. No statistical significant difference was found between Activa Bioactive and Riva RMGI (p > 0.05). CONCLUSION Bioactive ionic resin composite liner exhibited similar bond strength as RMGI to dentin and resin composite.
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Affiliation(s)
- Basma Ahmed
- Operative Department, Faculty of Oral and Dental Medicine, Delta University for Science and Technology, Gamasa, Egypt
| | - Hamdi H. Hamama
- Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
- Restorative Dentistry Dept, New-Mansoura University, New Mansoura, Egypt
| | - Salah Hasab Mahmoud
- Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
- Conservative Dentistry Dept, Horus University, New Damietta, Egypt
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Santos TML, Bresciani E, Matos FDS, Camargo SEA, Hidalgo APT, Rivera LML, Bernardino ÍDM, Paranhos LR. Comparison between conventional and chemomechanical approaches for the removal of carious dentin: an in vitro study. Sci Rep 2020; 10:8127. [PMID: 32415190 PMCID: PMC7229020 DOI: 10.1038/s41598-020-65159-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 04/29/2020] [Indexed: 12/03/2022] Open
Abstract
The present study aimed to evaluate the efficiency, effectiveness, and biocompatibility of two agents used for the chemomechanical removal of carious dentin. Sixty extracted carious human teeth were treated with a conventional bur (CBG) or chemomechanical agents – Papacarie Duo (PG) and Brix 3000 (BG). Treatment efficiency and effectiveness were assessed by the working time for carious dentin removal and Knoop microhardness values, respectively. Human pulp fibroblasts (FP6) were used to evaluate cytotoxicity by incorporating MTT dye, and genotoxicity was evaluated with the micronuclei test. The carious tissue was removed in a shorter time with CBG (median = 54.0 seconds) than the time required for chemomechanical agents (p = 0.0001). However, the time was shorter for Brix 3000 (BG) than that for Papacarie Duo (PG), showing mean values of 85.0 and 110.5 seconds, respectively. Regarding microhardness testing, all approaches tested were effective (p < 0.05). The final mean microhardness values were 48.54 ± 16.31 KHN, 43.23 ± 13.26 KHN, and 47.63 ± 22.40 KHN for PG, BG, and CBG, respectively. PG decreased cell viability compared to that of BG, but it presented no genotoxicity. Brix 3000 may be a good option for chemomechanical dentin caries removal due to its reduced removal time and lower cytotoxicity compared to the other treatment options.
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Affiliation(s)
| | - Eduardo Bresciani
- Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, SP, Brazil
| | - Felipe de Souza Matos
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil
| | | | - Ana Paula Turrioni Hidalgo
- Department of Pediatric Dentistry, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil
| | - Luciana Monti Lima Rivera
- Department of Dentistry, School of Dentistry, University of Araraquara (UNIARA), Araraquara, SP, Brazil
| | | | - Luiz Renato Paranhos
- Department of Preventive and Social Dentistry, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
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Tjäderhane L, Tezvergil-Mutluay A. Performance of Adhesives and Restorative Materials After Selective Removal of Carious Lesions: Restorative Materials with Anticaries Properties. Dent Clin North Am 2019; 63:715-729. [PMID: 31470925 DOI: 10.1016/j.cden.2019.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Selective carious tissue-removal strategies require specific considerations in selection of restorative materials. A tight marginal seal placed over hard dentin and sound enamel is essential. For selective removal of carious tissue with permanent restoration, bioactive materials, such as high-viscosity glass-ionomer cement (HV-GIC) or calcium silicates, may be preferred over caries-affected firm or leathery dentin to improve remineralization. HV-GICs have the best clinical evidence of caries-arresting effect and demonstrate sufficient longevity as long-term provisional restorations that can later be used in open or closed sandwich restorations. As with any material, oral health maintenance remains important for long-term survival of restorations.
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Affiliation(s)
- Leo Tjäderhane
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki University Hospital, PO Box 41, Helsinki 00014, Finland; Research Unit of Oral Health Sciences, Medical Research Center Oulu (MRC Oulu), Oulu University Hospital, University of Oulu, Oulu, Finland.
| | - Arzu Tezvergil-Mutluay
- Department of Cariology and Restorative Dentistry, Adhesive Dentistry Research Group, Institute of Dentistry, Turku University Hospital, TYKS, University of Turku, Lemminkäisenkatu 2, Turku 20520, Finland
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Rosa WLO, Lima VP, Moraes RR, Piva E, Silva AF. Is a calcium hydroxide liner necessary in the treatment of deep caries lesions? A systematic review and meta‐analysis. Int Endod J 2018; 52:588-603. [DOI: 10.1111/iej.13034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 10/31/2018] [Indexed: 11/29/2022]
Affiliation(s)
- W. L. O. Rosa
- Graduate Program in Dentistry Department of Restorative Dentistry Federal University of Pelotas Pelotas RS Brazil
| | - V. P. Lima
- Graduate Program in Dentistry Department of Restorative Dentistry Federal University of Pelotas Pelotas RS Brazil
| | - R. R. Moraes
- Graduate Program in Dentistry Department of Restorative Dentistry Federal University of Pelotas Pelotas RS Brazil
| | - E. Piva
- Graduate Program in Dentistry Department of Restorative Dentistry Federal University of Pelotas Pelotas RS Brazil
| | - A. F. Silva
- Graduate Program in Dentistry Department of Restorative Dentistry Federal University of Pelotas Pelotas RS Brazil
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Clinical and Radiographic Success of Selective Caries Removal to Firm Dentin in Primary Teeth: 18-Month Follow-Up. Case Rep Dent 2018; 2018:9213681. [PMID: 29796320 PMCID: PMC5896234 DOI: 10.1155/2018/9213681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 02/14/2018] [Indexed: 12/11/2022] Open
Abstract
The selective caries removal is increasingly spreading in daily clinical practice because this minimally invasive technique treats deep carious lesion and decreases the risk of pulp exposure. This case report was aimed at describing the selective removal to firm dentin on the primary mandibular left first molar of a girl aged 7 years and 6 months. The Mineral Trioxide Aggregate (MTA Angelus™) was used as liner, and the tooth was definitively restored with resin-modified glass ionomer cement (Vitremer™). The clinical and radiographic following-up was performed at 6, 12, and 18 months after treatment. The treatment showed satisfactory results after 18-month following-up, suggesting that this minimally invasive approach for carious lesion removal can replace the total removal, when properly indicated. Notwithstanding, further randomized clinical trials with longer following-up periods are still necessary.
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Silva PFD, Oliveira LRS, Braga SSL, Signori C, Armstrong SR, Soares CJ, Cenci MS, Faria-E-Silva AL. Effect of selective carious tissue removal on biomechanical behavior of class II bulk-fill dental composite restorations. Dent Mater 2018; 34:1289-1298. [PMID: 29793795 DOI: 10.1016/j.dental.2018.05.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/25/2018] [Accepted: 05/10/2018] [Indexed: 11/17/2022]
Abstract
OBJECTIVES This study aimed to develop a method to induce carious lesions in the pulpal floor dentin of a class II cavity preparation, and to determine the effects of this carious lesion on the biomechanical behavior of the dental composite restoration. METHODS The pulpal floor dentin of class I cavities in sound third molars were demineralised with acetic acid for 35days followed by a 7-day exposure to pooled human saliva biofilm and demineralization was verified by micro-CT. Subsequently, the proximal walls were removed forming a class II cavity and the caries lesion was left intact or was completely removed prior to restoration with a bulk-fill dental composite (n=10). Cuspal deflection was assessed by strain-gauge and micro-CT imaging. The presence of enamel cracks was assessed by transillumination before and after restoration, and again after 1,200,000 cycles of mechanical fatigue in a chewing simulator. Finally, resistance to fracture by axial compressive loading and failure mode was determined. Data were analyzed by 2-way repeated measures ANOVA, Fisher's exact test, and t-test (α=0.05). RESULTS The presence of carious lesions had no significant effect upon cuspal deflection, formation of enamel cracks, and fracture strength of the dental composite restorations. The restorative procedure increased the number of enamel cracks, which was not affected by mechanical cycling. SIGNIFICANCE Maintaining carious lesions does not affect the biomechanical behavior of class II restorations performed with bulk-fill dental composite.
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Affiliation(s)
- Paula Fernanda Damasceno Silva
- Graduate program in Dentistry, Federal University of Sergipe, Rua Claudio Batista s/n, Sanatorio, Aracaju, SE, 49060-100, Brazil.
| | - Lais Rani Sales Oliveira
- Graduate program in Dentistry, Dental School, Federal University of Uberlândia,Av. Pará 1720, Bloco 4LA, Campus Umuarama, Uberlândia, MG, 38400-902, Brazil.
| | - Stella Sueli Lourenço Braga
- Graduate program in Dentistry, Dental School, Federal University of Uberlândia,Av. Pará 1720, Bloco 4LA, Campus Umuarama, Uberlândia, MG, 38400-902, Brazil.
| | - Cácia Signori
- Graduate program in Dentistry, Dental School, Federal University of Pelotas, Rua Gonçalves Chaves 457, sala 505, Pelotas, RS, 96015-560, Brazil.
| | - Steve R Armstrong
- Department of Operative Dentistry, College of Dentistry and Dental Clinics, University of Iowa,S-244A Dental Science Building, Iowa City, IA, 52242, USA.
| | - Carlos José Soares
- Department of Restorative Dentistry, Dental School, Federal University of Uberlândia, Av. Pará 1720, Bloco 4LA, Campus Umuarama, Uberlândia, MG, 38400-902, Brazil.
| | - Maximiliano Sérgio Cenci
- Department of Operative Dentistry, College of Dentistry and Dental Clinics, University of Iowa,S-244A Dental Science Building, Iowa City, IA, 52242, USA.
| | - André Luis Faria-E-Silva
- Department of Dentistry, Federal University of Sergipe, Rua Claudio Batista s/n, Sanatorio, Aracaju, SE, 49060-100, Brazil.
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da Rosa WLO, Piva E, da Silva AF. Disclosing the physiology of pulp tissue for vital pulp therapy. Int Endod J 2018; 51:829-846. [DOI: 10.1111/iej.12906] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 01/30/2018] [Indexed: 12/23/2022]
Affiliation(s)
- W. L. O. da Rosa
- Department of Restorative Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas Brazil
| | - E. Piva
- Department of Restorative Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas Brazil
| | - A. F. da Silva
- Department of Restorative Dentistry; School of Dentistry; Federal University of Pelotas; Pelotas Brazil
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Biological response to self-etch adhesive after partial caries removal in rats. Clin Oral Investig 2018; 22:2161-2173. [PMID: 29380132 DOI: 10.1007/s00784-017-2303-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 12/07/2017] [Indexed: 01/14/2023]
Abstract
OBJECTIVES The purposes of this study were to evaluate a model of slow caries progression and to investigate the performance of a self-etch adhesive system for partial caries removal. MATERIALS AND METHODS Rat molars were infected with Streptococcus sobrinus 6715 culture. Different time points were analyzed: days 78, 85, and 95 (± 2). After this, the samples were processed for morphological analysis. Additionally, the first molars were restored with zinc oxide and eugenol (IRM™; Dentsply; Brazil) or adhesive system (Clearfil SE Bond™; Kuraray Medical; Japan) 78 days after caries induction. After, 3 or 15 days post-treatment, the animals were euthanized, and their mandibles were processed for morphological analysis, classified by means of scores, and submitted to statistical analysis. Subsequently, immunohistochemical analysis was performed for osteonectin (OSN) and transforming growth factor-ß1 (TGF-ß1) expression. RESULTS According to the caries induction model used, on day 95 greater inflammatory infiltration (p < 0.001), and more extensive degradation of secondary/primary dentin were demonstrated than on day 78 (p < 0.05). Furthermore, the restorative materials presented similar performance (p > 0.05) and proved to be fundamental to control the carious lesion. The TGF-ß1 and OSN were shown to be active during the caries process. CONCLUSIONS The slow caries lesion model was feasible for morphological analysis of the dentin-pulp complex. The self-etch adhesive system triggered no acute inflammatory infiltration or pulp necrosis, instead it seemed to stimulate early pulp repair. CLINICAL RELEVANCE Clearfil SE Bond™ applied directly on caries-affected dentin did not predispose to pulp inflammation; instead, it appeared to provide early biological benefits.
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