Hu L, Zhao Z, Song J, Fan Y, Jiang W, Chen J
College of Stomatology, West China University of Medical Sciences.
Hua Xi Kou Qiang Yi Xue Za Zhi. 2001 Feb;19(1):46-8.
The distribution of stress on the surface of condylar cartilage was investigated.
Three-dimensional model of the 'Temporomandibular joint mandible Herbst appliance system' was set up by SUPER SAP software (version 9.3). On this model, various bite reconstruction was simulated according to specified advanced displacement and vertical bite opening. The distribution of maximum and minimum principal stress on the surface of condylar cartilage were computerized and analyzed.
When Herbst appliance drove the mandible forward, the anterior condyle surface was compressed while the posterior surface was drawn. The trend of stress on the same point on the condyle surface was consistent in various reconstruction conditions, but the trend of stress on various point were different in same reconstruction conditions.
All five groups of bite reconstruction (3-7 mm advancement, 4-2 mm vertical bite opening of the mandible) designed by this study can be selected in clinic according to the patient's capability of adaptation, the extent of malocclusion and the potential and direction of growth.
研究髁突软骨表面应力的分布情况。
应用SUPER SAP软件（版本9.3）建立“颞下颌关节-下颌Herbst矫治器系统”的三维模型。在此模型上，根据指定的前伸位移和垂直开口咬合模拟各种咬合重建。通过计算机处理并分析髁突软骨表面最大和最小主应力的分布情况。
当Herbst矫治器推动下颌向前时，髁突前表面受压而后表面受牵拉。在各种重建条件下，髁突表面同一点的应力变化趋势一致，但在相同重建条件下，不同点的应力变化趋势不同。
本研究设计的五组咬合重建（下颌前伸3 - 7mm，垂直开口咬合4 - 2mm）在临床上可根据患者的适应能力、错牙合程度以及生长潜力和方向进行选择。
