Gap Vs Interpositional Arthroplasty in the Management of Temporomandibular Joint Ankylosis

The objectives of the study were to evaluate the outcome of Gap arthroplasty and Interpositional arthroplasty in terms of mouth opening for management of TMJ ankylosis. This Quasi experimental study was carried out in Oral & Maxillofacial Surgical unit, Khyber College of Dentistry, Peshawar from May 2006 to August 2007. Sixty patients of TMJ ankylosis seeking treatment for the first time, irrespective of age and gender were included in the study. Thirty patients were treated by gap arthroplasty (group A), while thirty patients by disc interpositional arthroplasty (group B). A postoperative jaw opening exercise regimen was followed and interincisal distance/ mouth opening was measured at each follow up visit. Both groups were evaluated for difference in mouth opening. Descriptive statistics and Independent samples T-test was applied with significance level at P < 0.05. After 6-months postoperative follow up, mean interincisal distance was 30.80 mm (± 3.17 mm) for group A, and 32.20 mm (± 4.14 mm) for group B. Difference between the two groups was not significant (p= 0.147). Postoperative jaw opening exercises are crucial for lasting success.