Indirect composite resin repair: surface mechanical treatment analysis
Journal Title: RSBO - Year 2004, Vol 1, Issue 1
Abstract
The aim of this study was to compare the effect of the macro and micro- mechanical surface treatment in the strength of indirect composite resin repairs.Specimens of composite resin submitted to a secondary polymerization were done in halter form for the control group and in hemi-halter form for the other experimental groups.The specimens were storage for 30 days in artificial saliva before being submitted to a repair procedure.The macro-mechanical treatment was realized with a spherical diamond bur,and the micro-mechanical realized with an air abrasion system for ten seconds.After treatment, the surface was etched with phosphoric acid 37%, and the adhesive system was used without photoactivation before the application of the repair material. After tensile strength test it was observed that repairs were weaker than control group,but it was statistically significant with the group treated with macro-mechanical retentions.Comparing the surfaces treatments, the group treated by air abrasion presented statistically superior tensile strength values. Based on the results it is possible to conclude that the air abrasion provided best strength values in indirect composite resin repairs.
Authors and Affiliations
Luciano MADEIRA, Edgar COSTA
Keywords
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