The Effect of TMJ Abnomalities on Chewing Movements

Abstract

In order to investigate the effect of TMJ abnormality on the chewing movement, thesoft gum chewing movements were observed in 23 stomatognathic dysfunction patients by using Sirognathograph Analysing System. The 23 patients were divided into four groups by generalclinical examinations including simultaneous multilayer polytomograph. Group 1 consisted of sixpatients diagnosed as closed lock without bone change. Group 2 consisted of six patients diagnosedas closed lock with bone change. Group 3 consisted of four patients with TMJ bone change butwithout disk displacement. Group 4 consisted of seven patients diagnosed as anterior disk displacementwith reduction. The non-symptomatic side chewing movement of patients in Group1, 2 and 3, which means the patients with closed lock or bone change in TMJ had high tendencyto show deviation to the symptomatic side.