Ohta A, Hatate S, Kojima T, Ogawa K
Shigaku. 1989 Aug;77(2):694-700.
With the aim of designing more aesthetic prosthetic replacements, a series of experiments was conducted to obtain the points of reference for determining the postures (sitting and standing postures) and horizontal reference plane when patients assume the natural head position. The results thus obtained are as follows: 1. Measuring points in the sitting and standing postures were located about 15.0mm below the orbital point respectively. 2. The natural head position tended to shift upward significantly more frequently in the standing posture than in the sitting posture. 3. The natural head position in the standing posture varied less and was more restorable than in the sitting posture. 4. Between the three reference points in both postures, there was no significant difference in the degree of variation, but measurements based on the inner canthus of the eye showed the least variance. 5. In the standing posture, the measurements based on the inner canthus of the eye showed a little, but significant, variance from the measurements based on the three reference points in the sitting posture. From the above, it can be said that the point 25.6mm below the inner canthus of the eye, which was the average of the measurements taken in the standing posture, may be appropriate for use the anterior point of reference for transferring the natural head position onto the articulator.
为了设计出更美观的假体替代物，进行了一系列实验，以获取确定患者处于自然头部位置时的姿势（坐姿和站姿）及水平参考平面的参考点。由此得到的结果如下：1. 坐姿和站姿下的测量点分别位于眶点下方约15.0毫米处。2. 自然头部位置在站姿下比在坐姿下更频繁地显著向上移动。3. 站姿下的自然头部位置变化较小，且比坐姿下更易于恢复。4. 两种姿势下的三个参考点之间，变化程度无显著差异，但基于内眦的测量显示方差最小。5. 在站姿下，基于内眦的测量与坐姿下基于三个参考点的测量相比，存在微小但显著的差异。综上所述，可以说，站姿测量平均值即眼内眦下方25.6毫米处的点，可能适合用作将自然头部位置转移到牙合架上的前参考点。
