The purpose of this study was to evaluation of temporomandibular joint space according to increasing the occlusal force on working and non-working side during unilatreal bite. For the study, 22 normal adults, age raned from 23 to had no symptoms
on
TMJ
area and masticatory muscles and had normal or class I molar relationship were selected. Transcranial TMJ radiograph was taken during unilateral biting with sensor of Bite force checker(Nihon Kohden Kogyo Co, Ltd, Japan) on each 1 st molar teeth
of
right and left side which were forced each 0Kg, 10Kg, 20Kg and 30Kg by use of Accurad-200(Denar Corperation's product). The radiographs were traced on the screen, which was magnified by 5. The size of temporomandibular joint space at anterior,
superior
and posterior compartment were measured with Dumas's method (reference line of between squamotympanic fissure and the most inferior point of articular eminence.
@ES On the basis of this study, the following results were obtained.
@EN 1. Size of anterior TMJ space was tend to decrease on the working side and increase on the non-working side according to increasing the occlusal force. But not significant statistically (P>0.05).
2. Size of superior TMJ space was tend to increase on the working side and decrease on the non-working side according to increasing the occlusal force(P<0.05).
3. Size of posteior TMJ space was tend to decrease to both working and nonworking sine, but not significant statistically.
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