A Study on 3-dimensional Condylar Movements in Lateral Mandibular Movements. Part 3. The Movements of Non-working Condyle and Intercondylar Axis.

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  • 側方運動におけるか頭部三次元動態に関する研究　第３報　側方滑走運動時の平衡側か頭とか頭間軸の運動
  • Part 3. The Movements of Non-working Condyle and Intercondylar Axis
  • 第3報側方滑走運動時の平衡側顆頭と顆頭間軸の運動

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The movements of right and left condyles and intercondylar axis were analyzed using Kyushu University 3-D movement analyzing system, and the following results were obtained.<BR>1. In the rotation type of working condylar movement, the intercondylar axis rotated mainly around the working condyle, and the non-working condyle showed very slight internal sideshift.<BR>2. In the shift type and the winding type of that, the lateral mandibular movement was the combination of the intercondylar axis rotation and the bodily sideshift.<BR>3. In the external sideshift type and the winding type, the non-working condyle showed apparent internal sideshift.<BR>4. In the internal sideshift type of working condylar movement, the nonworking condyle showed slight external sideshift, that was as large as the internal sideshift, and almost straight forward movement.<BR>5. In all types of working condylar movement, the rotation angle of the intercondylar axis showed no difference.

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