Evaluating resin-dentin bond by microtensile bond strength test: Effects of various resin composites and placement techniques

Moosavi, H. and Maleknejad, F. and Forghani, M. and Afshari, E. (2015) Evaluating resin-dentin bond by microtensile bond strength test: Effects of various resin composites and placement techniques. Open Dentistry Journal, 9. pp. 409-413.

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Objectives: This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylatebased compared to a silorane-based resin composite in Class I cavity using different placement techniques. Materials and Methods: Class I cavities with dimension of (4 mm long, 4 mm wide, 3 mm deep) were prepared in extracted sound human molars. The teeth were randomly divided into six groups. The first three groups were filled with Filtek P90 using three methods of insertion; bulk, incremental and snow-plow, and the remaining three groups were filled with Clearfil AP-X using the same three placement techniques. After 24 hours of storage in water at 37°C, the specimens were thermocycled to 1000 cycles. Specimens were prepared for MTBS testing by creating bonded beams obtained from the pulpal floor. Statistical analysis used: Statistical analyses of data were performed by two-way ANOVA/Tukey (α=.05). Results: The experiment showed significant differences between the two resin composites with regard to filling techniques (P<0.05). The MTBS was significantly higher in each of Filtek P90 subgroup compared to Clearfil AP-X ones (P<0.05). With respect to filling technique in both resin composites, bulk insertion showed the significantly lowest MTBS (P<0.05), while no significant difference was found between the outcome of incremental and snow-plow techniques (P>0.05). Conclusion: Silorane-based resin composite as opposed to methacrylate based resin composite and layering placements in contrast to bulk filling method had higher microtensile bond strength. © Moosavi et al.; Licensee Bentham Open.

Item Type: Article
Additional Information: Cited By :1 Export Date: 16 February 2020 Correspondence Address: Forghani, M.; Dental Research Center, Mashhad University of Medical Sciences, Vakilabad Blvd, Iran; email: forghaniradm@mums.ac.ir
Uncontrolled Keywords: Bond strength Bulk filling Incremental filling Resin composite Snow-plow
Subjects: WU Dentistry. Oral surgery
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib5 lib5
Date Deposited: 05 May 2020 08:09
Last Modified: 05 May 2020 08:09
URI: http://eprints.mums.ac.ir/id/eprint/18987

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