A comparative effect of various surface chemical treatments on the resin composite-composite repair bond strength

Gupta, Shaloo and Parolia, Abhishek and Jain, Ashish and *, Kundabala M and *, Mandakini Mohan and Porto, Isabel Cristina Celerino de Moraes (2015) A comparative effect of various surface chemical treatments on the resin composite-composite repair bond strength. Journal of Indian Society of Pedodontics and Preventive Dentistry, 33 (3). pp. 245-249. ISSN 0970 - 4388

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Aim: The aim of this in vitro study was an attempt to investigate the effect of different surface treatments on the bond strength between preexisting composite and repair composite resin. Materials and Methods: Forty acrylic blocks were prepared in a cuboidal mould. In each block, a well of 5 mm diameter and 5 mm depth was prepared to retain the composite resin (Filtek™ Z350, 3M/ESPE). Aging of the composite discs was achieved by storing them in water at 37°C for 1 week, and after that were divided into 5 groups (n = 8) according to surface treatment: Group I- 37% phosphoric acid, Group II-10% hydrofluoric acid, Group III-30% citric acid, Group IV-7% maleic acid and Group V- Adhesive (no etchant). The etched surfaces were rinsed and dried followed by application of bonding agent (Adper™ Single Bond 2. 3M/ESPE). The repair composite was placed on aged composite, lightcured for 40 seconds and stored in water at 37°C for 1 week. Shear bond strength between the aged and the new composite resin was determined with a universal testing machine (crosshead speed of 0.5 mm/min). Statistical Analysis: The compressive shear strengths were compared for differences using ANOVA test followed by Tamhane’s T2 post hoc analysis. Results: The surface treatment with 10% hydrofluoric acid showed the maximum bond strength followed by 30% citric acid, 7% maleic acid and 37% phosphoric acid in decreasing order. Conclusion: The use of 10% hydrofluoric acid can be a good alternative for surface treatment in repair of composite resin restoration as compared to commonly used 37% orthophosphoric acid.

Item Type: Article
Uncontrolled Keywords: Composite resins, dental restoration failure, dental restoration repair, operative dentistry
Subjects: Dentistry > MCODS Mangalore > Conservative Dentistry
Depositing User: KMCMLR User
Date Deposited: 10 Jul 2015 06:19
Last Modified: 10 Jul 2015 06:19
URI: http://eprints.manipal.edu/id/eprint/143315

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