RESUMEN
The objective of this study was to document the TMJ ankylosis resulting from trauma to the chin during childhood. All patients presenting with TMJ ankylosis at the Oral and Maxillofacial Surgery Department of Mayo Hospital, Lahore from July 2007 to March 2009 were included in this study. Patient's age, sex, socioeconomic status, previous history of injury to the chin [scar mark under the chin], level of health care center initially contacted, initial treatment received at the time of injury were documented. A total of 180 patients presented with TMJ ankylosis during the study period. 102 [56.7%]were male and 78 [43.3%] were female patients [Male: Female ratio was 1.3:1] with an age range of 4 to 35 years [mean 12.5 years]. 174 [96.7%] patients had a scar mark under their Chin. 120[66.7%] had a history of fall from roof or a tree, 54[30%] were involved in a road traffic accident, all before the age of 10 years