Introduction: The temporomandibular joint (TMJ) forms the very cornerstone of craniofacial integrity and its ankylosis in a growing child may cause problems in daily food intake, speech, appearance, and oral hygiene is affected to a major extent. It is one of the common acquired pathologies afflicting the skeleton. It is also the most overlooked and under-managed problem in children. Materials and Methods: A house to house survey was conducted between 2010 and 2011 in rural and urban areas of Lucknow. A total of 21,720 children aged between 3-15 years from 9090 houses comprising a representative sample were included. Results: Ten TMJ ankylosis cases were identified in 21,720 children. Of these, six were bilateral and four were unilateral. Male to female ratio was 1:9, with most patients (70.0%) being in the 10-15 years’ age group (mean age was 11.1 years ± 3.34). The most common cause of ankylosis was trauma for 90.0% of cases. The majority of patients (70%) were reporting the condition for the first time, with 30% patients having had previous treatment. Conclusion: TMJ ankylosis is an acquired condition in most of the cases. Birth/childhood trauma would be the major causative factor. Knowledge amongst parents, providers of health about this entity was poor. Initial management of the causative factor was poor. Mere knowledge among the general population and healthcare providers can result in primary prevention and also secondary prevention along with its successful definitive treatment.