タッピング運動を利用した咬合採得法に関する研究
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概要
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In making a complete denture, maxillomandibular registration is very important step and various methods for registration have been reported. Of these methods, tapping movement has often been used clinically. Therefore, effectiveness of use of tapping movement was examined. For this study, tapping movement with the vertical dimension changed was recorded for 20 dentulous subjects and 13 denture-wearing subjects. Sweep recording of 50 tapping movements without overlapping was made possible by connecting a 2 pen recorder to a Mandibular Kinesiograph. On the basis of the recordings, anteroposterior displacement and lateral displacement of tapping point, tapping area, variance in tapping point, at various mandibular positions, were obtained. The results were as follows : 1. The maximum anteroposterior displacement of tapping at the centric occlusion in 20 dentulous subjects was 0.05±0.12mm anterior and 0.29±0.13mm posterior with an average of 0.09±0.10mm posterior. The maximum displacement was 0.13±0.06mm on the right and 0.21±0.10mm on the left with an average of 0.01±0.07mm on the right. The maximum tapping area was 0.06mm^2 and the minimum was 0.00mm^2 with an average of 0.02±0.02mm^2. 2. The anteroposterior displacement of the tapping point at various mandibular positions in the dentulous subjects increased as the vertical dimension was raised. However, the lateral displacement did not show any significant difference. 3. The tapping area in the dentulous subjects increased as the vertical dimension was raised. 4. In variance of tapping point at different mandibular positions in dentulous subjects, anteroposterior variance was significantly greater in 64.2% on the average and lateral variance in 12.9%. 5. The anteroposterior displacement and lateral displacement at various mandibular positions with the vertical dimension lowered in the denture-wearing subjects did not show any significant difference when compared with the displacement (0.46±0.29mm anterior and 0.16±0.30mm on the right to the centric relation) at the appropriate vertical dimension. The lateral displacement did not show significant difference even when the vertical dimension was raised. However, the anteroposterior displacement increased as the vertical dimension was increased and the displacement was 1.09±0.74mm anterior to the centric relation at the mandibular position raised by 6mm. 6. The tapping area at various mandibular positions with the vertical dimension lowered in the denture-wearing subjects did not show any significant difference in comparison with the tapping area (0.06±0.08mm^2) with the appropriate vertical dimension. However, as the vertical dimension was raised, the tapping area increased and the area was 0.39±0.46mm^2 at the mandibular position raised by 6mm. 7. When the anteroposterior variance was compared with the lateral variance of the tapping point at various mandibular positions in the denture-wearing subjects, the anteroposterior variance was significantly greater in 46.1% on the average and the lateral variance was significantly greater in 13.5% on the average.
- 九州歯科学会の論文
- 1984-10-25
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