Prevalence of Mandibular Arthrosis among Young People with History of External Force on Mandible

Abstract

A sample of 3108 students from eight high schools in Japan was investigated by means of a two-item questionnaire. The questionnaire included the occurrence of symptoms or signs of mandibular arthrosis and the history of external force on the mandible in junior high.
Statistical analysis of the data showed that the symptom-rate of students with a history of external force on the mandible was higher than those with no history.
It is suggested that the prevalence of mandibular arthrosis in young people might be associated with the history of external force on the mandible in their younger days.