Piehslinger E, Celar A, Celar R M, Slavicek R
Department of Removable and Fixed Prosthodontics, University of Vienna, Austria.
Cranio. 1994 Oct;12(4):247-51. doi: 10.1080/08869634.1994.11678029.
Unguided protrusive and retrusive mandibular movement was investigated in 76 asymptomatic volunteers and temporomandibular joint (TMJ) patients using computerized axiography. In 38 of these subjects, guided pro-/retrusion was also recorded. Measurements were performed in a three-dimensional Cartesian coordinate system (x = anteroposterior; y = transversal, toward the hinge axis; z = craniocaudal). Transversal shift (y) was measured and evaluated as well as the distance "s" and horizontal condylar inclination (HCl) at the point of maximum transversal deviation. The patterns of the tracings were analyzed with a view to diagnostic improvements. The objective of this study was to evaluate transversal shift and to examine the postulate of symmetrical behavior of the TMJs in pro-/retrusion. The mean mandibular shift was 0.15 mm to the left. This maximum deviation was seen in a mean distance "s" of 7.42 mm in relation to the Cartesian coordinate system in reference position. These results suggest a functional dominance of the right part of the mandible in protrusive and retrusive movement.
使用计算机轴面断层摄影术，对76名无症状志愿者和颞下颌关节（TMJ）患者进行了下颌前伸和后缩的无引导运动研究。在这些受试者中的38人，还记录了引导下的前伸/后缩情况。测量在三维笛卡尔坐标系中进行（x = 前后方向；y = 横向，朝向铰链轴；z = 颅尾方向）。测量并评估横向移位（y）以及在最大横向偏差点处的距离“s”和髁突水平倾斜度（HCl）。分析描记图的模式以改进诊断。本研究的目的是评估横向移位，并检验颞下颌关节在前后运动中对称行为的假设。下颌平均向左移位0.15毫米。相对于参考位置的笛卡尔坐标系，在平均距离“s”为7.42毫米时出现了这种最大偏差。这些结果表明在下颌前伸和后缩运动中，下颌右侧具有功能优势。
