The aim of the present study was to investigate a relation between occlusal wear area and occlusal coo. patterns. For the purpose, occlusal wear area were measured in 58 dental students and in 129 patients ailh temporomandibular disorders(TMDs) from dental casts. Teeth used in this study were from canine to second molar on both sides in upper arch, totally ten. Occlusal wear area on casts was marked by pencil and photocopied, and then, the area was measured with planimeter. Occlusal relation was clinically examined with regard to Angle´s classification, chewing side preference, lateral guidance pattern and bruxing and/or ckkndi rq habit. T-Scan, electronic occlusal contact analyzer, was used to record ocdusal contact number, contact fnM contact time and occlusal balance that is TLR(total left-right statistics) during tooth contact All meastn- jl were repeated 3 times and the average value was used for ´ data probessing. The obtained results were follows:.
1. Mean value of occlusal wear area did not differ significantly between dental students and patients
2. There was not significant difference in wear area between chewing side and non-chewing side in bod gimps
a Occlusal wear area was significantly increased with age in both groups.
4. Three subgroups divided by Angle´s classification did not show any difference in occlusal wear area an% them, but three subgroups divided by lateral guidance pattern showed slightly significant difference between canine guide subgroup and group function subgroup in patients. Occlusal wear area in group function subgroup were larger than canine guide subgroup.
5. Mean value of wear area in patients with bnudng and/or clenching habit did not differ from those in pati6RS without such habit.
6. Conrelationship among items related to occlusal contact pattern were highly consistent and significant it dental students and only one item significantly correlated with occlusal wear area was tooth contact 60
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