The purpose of this study was to investigate the disclusion time and occlusal pattern during lateral movement in normal group and temporomandibular dysfunction(TMD) group. Twenty dental college students of Chosun University without the abnormal
occlusion and temporomandibular dysfunction were selected as a normal group, and twenty slight temporomandibular dysfunction (TMD) group and the ten moderate temporomandibular dysfunction( TMD) group classified according to Helkimo’s dysfunction
index
were selected. Occlusal pattern was classified as canine guided occlusion, group functioned occlusion and the other group during lateral movement and disclusion time in lateral movement was measured using T-Scan system.
@ES The results were as follows:
@EN 1. The disclusion time according to each group was 1.24±0.58 sec in normal group, 1.60±079 sec in slight TMD group and 2.29±0.80 sec in moderate TMD group.
There was statistically significant between normal group and moderate TMD group(P<0.01), slight TMD group and moderate TMD group(P<0.05).
2. The distribution of occlusal pattern in normal group was 62.5% (25 side) in canine guided occlusion, 27.5% (15 side) in group functioned occlusion.
3. The distribution of occlusal pattern in slight TMD group was 45% (18side) in canine guided occlusion, 35% (14 side) in group functioned occlusion and 20% (8side) in others and that in moderate TMD group was 15% (3 side) in canine guided
occlusion,
35% (7 side) in group functioned occlusion and 50% (10 side) in other.
4. The disclusion time in normal group was 1.05±0.59 sec at canine guided occlusion and 1.53±0.72 sec at group functioned occlusion.
5. The disclusion time in slight TMD group was 1.23±0.75 sec in canine guided occlusion, 1.50±0.88 sec in group functioned occlusion, and 2.61±0.57 sec in the other, There was staistically significant between canine guided occlusion and other
(P<0.001) and group functioned occlusion and the other (P<0.05).
6. The disclusion time in moderate TMD group was 1.28±0.84 sec in canine guided occlusion, 1.75±0.58 sec in group functioned occlusion, and 2.98 0.08 sec in the other(P<0.01)
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