Comparative evaluation of the efficiency of canine retraction using modified marcotte and opus loop – A split mouth, randomized clinical trial

Abstract

To Compare the efficiency of canine retraction using modified Marcotte and Opus loop. Patients with all first premolar extraction were fitted with Opus and Modified Marcotte loop on left and right side of maxillary arch. Rate of canine retraction was evaluated after 3-months using digital Vernier Callipers on procured models, Lateral cephalograms, and OPG. Average retraction with Modified Marcotte loop using TMA wire was 2.5±0.5 mm and Opus Loop using TMA wire was 3.8±0.5mm for the period of three months. Average retraction with Modified Marcotte loop using TMA wire was 1.1 mm and Opus Loop using TMA wire was 0.77 mm for the period of three months. Greater amount of maxillary canine retraction occurred using the 0.017 × 0.025 TMA Opus loop (3.8 mm) as compared to the 0.017 × 0.025 TMA Modified Marcotte loop (2.5 mm).The anchorage loss with Modified Marcotte loop is more (1.1mm) compared to Opus loop (0.07mm). The 0.017 × 0.025 TMA Modified marcotte loop showed 15.75° tipping, whereas the 0.017 × 0.025 TMA Opus loop showed 6.75° tipping, indicating that the Opus loop had better control.