Song J, Zhao Z, Hu L, Jiang W, Fan Y, Chen J
College of Stomatology, West China University of Medical Sciences.
Hua Xi Kou Qiang Yi Xue Za Zhi. 2001 Feb;19(1):43-5.
This study aimed to provide some biomechanical references for the clinical use and improvement of Herbst appliance.
The three-dimensional model of the 'Temporomandibular joint mandible Herbst appliance system' was set up by SUPER SAP software (version 9.3). On this model, the passive tensile in the masticatory muscles and ligaments were analyzed under various bit reconstruction designed according to specified advanced displacement and vertical bite opening.
When Herbst appliance drove the mandible forward, there was not any tensile in the medial, lateral pterygoid and the collateral ligament, while the temporalis, the deep paret of masseter, the stylomandibular ligament, and the sphenomandibular ligament were passively drawn. Under various bite reconstruction, the passive tensile in the medial temporalis, the posterior temporalis, the stylomandibular ligament and the sphenomandibular ligament increased with the amount of the advancement of the mandible; The passive tensile in the posterior temporalis and the deep part of masseter increased with the amount of vertical bite opening of the mandible.
The StL, SpL, PT and AT played an important role in functional reconstruction of mandible by Herbst. All five group 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.
本研究旨在为Herbst矫治器的临床应用及改进提供一些生物力学参考。
采用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，根据特定的前伸位移和垂直打开咬合设计不同的咬合重建，分析咀嚼肌和韧带的被动拉伸情况。
当Herbst矫治器推动下颌向前时，翼内肌、翼外肌和侧副韧带无拉伸，而颞肌、咬肌深层、茎突下颌韧带和蝶下颌韧带被被动牵拉。在不同的咬合重建下，颞肌内侧、颞肌后部、茎突下颌韧带和蝶下颌韧带的被动拉伸随下颌前伸量增加；颞肌后部和咬肌深层的被动拉伸随下颌垂直打开咬量增加。
茎突下颌韧带、蝶下颌韧带、颞肌后部和颞肌前部在Herbst矫治器对下颌的功能重建中起重要作用。本研究设计的五组咬合重建（下颌前伸3-7mm，垂直打开咬合4-2mm）可根据患者的适应能力、错牙合程度以及生长潜力和方向在临床上选用。
