An in-vitro study to compare efficacy of lingual retainer bonder with different adhesive system

Abstract

Objective: To compare detachment force, wire deflection and adhesive remnant index (ARI) after debonding between different lingual retainers with two adhesive system

Methods:  80 extracted teeth were mounted on acrylic blocks in pair and divided into 4 groups of 10 sample in each. Group 1 was coaxial wire bonded with packable composite, Group 2 was co axial wire bonded with flowable composite, Group 3 was braided wire bonded with packable composite and group 4 was braided wire bonded with flowable composite. Wire deformation was recorded using a Universal Testing Machine during debonding procedure. The amount of adhesive remaining in tooth after wire debonded was assessed using ARI index.

Results:  Mean force for debonding was found to be higher in group 4 followed by Group 3, 2 and 1 respectively. Braided wire required force for dislodgement. Higher mean deformation was recorded in Group 2 followed by group 1, 3 and 4 respectively. The difference in mean deformation among the groups was found to be statistically significant (P<0.001). The association between ARI scores and the groups were not statistically significant.

 Conclusion: .The difference in mean deformation among the groups was found to be statistically significant (P<0.001). Coaxial wire bonded with flowable composite showed the greatest deformation when compared to other groups. The association between ARI scores and the groups were not statistically significant.