口蓋形態と歯列弓形態との関連性について
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概要
- 論文の詳細を見る
It is important in prosthetics which provides restoration after a tooth loss to have information of the state existed before the tooth loss. In arrangement of artificial teeth for denture especially, the palate form and dental arch form of the natural dentition and their relationship will be one of the guides. A hundred subjects with individual normal occlusion therefore were selected and their palate forms and dental arch forms were analyzed objectively and the relationship among the palate form, dental arch form and teeth were examined. For taking measurements, a Formcorder and a Three Dimensional Digital Coordinate System were used. The results were as follows : 1. In visual classification of palate form, round or round square types were most frequent and most of their dental arch forms were either paraboloid or round. 2. For classifying palate form, palatal form index and palatal incline angle are useful means. With the use of palatal width and height indexes alone, conventionally used, did not reveal any relationship with the visual classification of palate form. 3. Classifying dental arch form into paraboloid, round and round square types was not possible by use of dental arch index alone. Inclusion of curvature index of the anterior teeth made possible more definite classification. 4. In the correlationship among palatal form index, palatal incline angle, dental arch form index, and curvature index of anterior teeth, significant correlationship was seen in part between palatal incline angle and dental arch form index. However, direct relationship between palatal form and dental arch form could not be determined. 5. Rotation angle of the canine did not show relationship with other items for analysing dental arch form (dental arch form index, curvature index of anterior teeth, etc.). However it had highly significant correlationship with palatal incline angle. 6. Incline angle of cusp-points-connecting line to the prosthetic plane was negative for the premolars (cusp points on the buccal side were lower than those on the lingual side), and positive for the molars. In the subjects with normal occlusion, incline angle of cusp-points-connecting line of the first molar to prosthetic plane showed highly significant correlationship with palatal incline angle of the first molar region.
- 九州歯科学会の論文
- 1983-02-25