Introduction
bite, TMD, malocclusion, TMJ disorders, ADD
TMJ
Temporomandibular joint (TMJ) anterior disc displacement (ADD) is one of the most prevalent TMJ disorders (TMD) in the population [After DR we found that the condyle moved anteriorly and inferiorly with increased joint space, which caused open bite in the molars. While after an average of 3 months postoperation, the condyle returned to its normal position [Hence, we hypothesized that in adolescent skeletal Class II malocclusion with bilateral ADDwoR, DR by OSu with POS would stimulate more condylar bone regeneration and improve mandibular retrusion than surgery only. A randomized controlled trial was designed to evaluate this hypothesis.