Our study is observational cross sectional study to evaluate the prevalence ofTempro-mandibular Joint Disorder( TMDs) in Egyptian adolescents based on Diagnostic Criteria for Tempro-mandibular Disorders(DC/TMD) .The following examinationwill be done for each patient and recorded in his/her chart:~Include maximal mandibular opening capacity, joint noises, deviation of mandible during opening and closing, tenderness of the TMJ and masticatory muscles, headache and pain in TMJ area.~All clinical examinations will be carried out by one investigator. Examination of TMJ disorders include the following aspects: I) Examination of TMJ sounds (clicking and crepitus) using a stethoscope over the TMJ area and by having the patient open and close the mouth.~II) Associated muscle disorders will be determined by:~palpation of TMJ area.~digital palpation and functional manipulation of the masticatory muscles according to Okeson.
the Prevalence of the Signs and Symptoms of Tempro-mandibular Joint Disorder in a sample of Egyptian adolescents