下顎運動の前方および後方誘導要素と臼歯咬合小面の関連性について
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概要
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The occlusal facet of the molar results from functional movement of the teeth and is therefore affected by guidance for the anterior teeth which is anterior guidance for the mandibular movement and by condylar path which is posterior guidance. The facet is expected to have morphology in harmony with these two factors. With 22 persons with individual normal occlusion as the subjects, observations were made of condylar path, overlap of the anterior teeth region, and characteristic morphology of the occlusal facet of the molar region, and correlation among them was then studied. The results were as follows : 1. The percentages of G.F.O. and C.P.O. were 45.4% and 54.6%, respectively. 2. Condylar path inclination was 33.6±5.1° for G.F.O. and 34.5±5.5° for C.P.O. No significant correlation was found between the two. 3. Functional incisal path inclination was 33.4±10.5°for G.F.O. and 38.7±10.0°for C.P.O. No significant correlation was found between the two. 4. Anatomical incisal path inclination was 33.4±11.1°for G.F.O. and 39.3±9.8°for C.P.O. Significant difference was found between the two. 5. The inclination of the anterior occlusal facet for the lower first molar was 33.2±7.7°for G.F.O. and 38.0±7.3°for C.P.O. Significant difference was found between the two. 6. Between condylar path inclination and functional incisal path inclination, no significant correlation was found for G.F.O. and C.P.O. Between condylar path inclination and anatomical incisal path inclination, no significant correlation was found for G.F.O. and C.P.O. Between condylar path inclination and inclination of the occlusal facet, no significant correlation was found for G.F.O. or C.P.O. 7. Between functional incisal path inclination and inclination of the occlusal facet, significant correlation was found for both G.F.O. and C.P.O. 8. What characterizes G.F.O. and C.P.O. is the difference in the degree between condylar path inclination and incisal path inclination. There was a tendency for C.P.O. to be large in the difference and small for G.F.O.
- 九州歯科学会の論文
- 1989-08-25
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