Position of mandibular condyle at maximal mouth opening in symptom free subjects.

ABSTRACT

The purpose of this study was to ascertain maximal mouth opening in normal symptom free subjects and to evaluate radiographically the anatomic position of the condyle during such an opening. Also to find out the prevalence of clinical signs of TMJ dysfunction in asymptomatic subjects. Sixty subjects aged 15-45 years were selected according to stringent criteria. The clinical evaluation comprised of measurements of mouth opening, deviation on opening and assessing any joint sounds. Then transcranial radiographs were taken and different linear measurements were done. The values and correlations were analyzed using students 't' test. Females presented higher degree of clinical signs (joint sounds) of TMD than males. Almost all the subjects had their condyles translated beyond the articular eminence showing more of an inferior vertical shift. It is required that similar studies be conducted on different ethic population and different age groups. Results could be interesting and shed light in the relativity dark area of TMD.