Temporomandibular joint is a major structure to play an important role in the function & stability of the occlusion as well as the stomatognathic system. Therefore, the TMJ is the structure that requires the complete analysis for diagnosing and planning treatment of pathologic changes by TMJ dysfunction and malocclusion. So, in this study, to evaluate TMJ situation in Korean malocclusion, based on the previous accomplishments, students of the dental college of Won-Kwang Univ. are surveyed and selected in terms of Angle’s classification of malocclusion, whose TMJ radiographs were taken in the centric occlusion and centric relation. In each maiocclusion groups, the mean and standard deviation of anterior, posterior and superior joint space of the right, left and both side in CO & CR are evaluated and also those of the fossa height and the articular eminence angle of the right, left ad both sides are evaluated. The obtained results were as follows:
1.In the correlation coefficient between the malocclusion groups, no other items except the posterior joint space of the right side in CR between in class Ⅰ and class Ⅲ are significant. 2.In the correlation coefficient between the right and left side, the each joint space in class Ⅰ malocclusion group and class Ⅱ malocclusion group are significant. 3.In the change of each joint space during the transmit from CO to CR, there is a tendency of increasing anterior joint space and decreasing posterior, superior joint spaces in class Ⅰ, Ⅱ malocclusion and increasing superior joint space and decreasing anterior, posterior joint space in class Ⅲ malocclusion, which is significant in the correlation coefficient, but not significant in the T-test. 4.In each malocclusion group, the correlation coefficient between the posterior joint space and the superior joint space in C.R is highly significant. 5.The fossa height of class Ⅱ malocclusion group is lesser than that of class Ⅰ or class Ⅲ, which is not significant in T-test. 6.In the correlation coefficient between Rt. and Lt. side in the fossa height, it is not significant in class Ⅰ and class Ⅲ group, but significant in class Ⅱ malocclusion group. 7.The articular eminence angle of class Ⅱ malocclusion group is larger then that of class Ⅰ or class Ⅲ groups, which is fairly significant. 8.In the correlation coefficient between Rt. and Lt. side in the articular eminence angle, it is significant in each malocclusion group.
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