Carounanidy Usha1, Sathyanarayanan Ramarao2, Bindu Meera John3, Praveen Rajesh4, S Swatha5. 1. Professor, Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences , Puducherry, India . 2. Professor and Head, Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences , Puducherry, India . 3. Reader, Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences , Puducherry, India . 4. Senior Lecturer, Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences , Puducherry, India . 5. Postgraduate Student, Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences , Puducherry, India .
Abstract
INTRODUCTION: Bonding of composite resin to dentin mandates a wet substrate whereas, enamel should be dry. This may not be easily achievable in intracoronal preparations where enamel and dentin are closely placed to each other. Therefore, Dentin Bonding Agents (DBA) are recommended for enamel and dentinal bonding, where enamel is also left moist. A research question was raised if the "enamel-only" preparations will also benefit from wet enamel bonding and contemporary DBA. AIM: The aim of this study was to compare the shear bond strengths of composite resin, bonded to dry and wet enamel using fifth generation DBA (etch and rinse system) containing various solvents such as ethanol/water, acetone and ethanol. MATERIALS AND METHODS: The crowns of 120 maxillary premolars were split into buccal and lingual halves. They were randomly allocated into four groups of DBA: Group 1-water/ethanol based, Group 2-acetone based, Group 3-ethanol based, Group 4-universal bonding agent (control group). The buccal halves and lingual halves were bonded using the wet bonding and dry bonding technique respectively. After application of the DBAs and composite resin build up, shear bond strength testing was done. RESULTS: Group 1 (ethanol/water based ESPE 3M, Adper Single Bond) showed highest bond strength of (23.15 MPa) in dry enamel. Group 2 (acetone based Denstply, Prime and Bond NT, showed equal bond strength in wet and dry enamel condition (18.87 MPa and 18.02 MPa respectively). CONCLUSION: Dry enamel bonding and ethanol/water based etch and rinse DBA can be recommended for "enamel-only" tooth preparations.
INTRODUCTION: Bonding of composite resin to dentin mandates a wet substrate whereas, enamel should be dry. This may not be easily achievable in intracoronal preparations where enamel and dentin are closely placed to each other. Therefore, Dentin Bonding Agents (DBA) are recommended for enamel and dentinal bonding, where enamel is also left moist. A research question was raised if the "enamel-only" preparations will also benefit from wet enamel bonding and contemporary DBA. AIM: The aim of this study was to compare the shear bond strengths of composite resin, bonded to dry and wet enamel using fifth generation DBA (etch and rinse system) containing various solvents such as ethanol/water, acetone and ethanol. MATERIALS AND METHODS: The crowns of 120 maxillary premolars were split into buccal and lingual halves. They were randomly allocated into four groups of DBA: Group 1-water/ethanol based, Group 2-acetone based, Group 3-ethanol based, Group 4-universal bonding agent (control group). The buccal halves and lingual halves were bonded using the wet bonding and dry bonding technique respectively. After application of the DBAs and composite resin build up, shear bond strength testing was done. RESULTS: Group 1 (ethanol/water based ESPE 3M, Adper Single Bond) showed highest bond strength of (23.15 MPa) in dry enamel. Group 2 (acetone based Denstply, Prime and Bond NT, showed equal bond strength in wet and dry enamel condition (18.87 MPa and 18.02 MPa respectively). CONCLUSION: Dry enamel bonding and ethanol/water based etch and rinse DBA can be recommended for "enamel-only" tooth preparations.
Authors: André Figueiredo Reis; Marcelo Tavares Oliveira; Marcelo Giannini; Mário Fernando De Goes; Frederick A Rueggeberg Journal: Oper Dent Date: 2003 Nov-Dec Impact factor: 2.440
Authors: Sheyla Caceres; Gerardo Ayala; Daniel Alvítez-Temoche; Daniel Suarez; Romel Watanabe; Frank Mayta-Tovalino Journal: J Int Soc Prev Community Dent Date: 2020-08-06