下颌前伸后大鼠颞下颌关节盘的组织学和组织化学研究

Histologic and Histochemical Studies on the Temporomandibular Articular Disc in Young Growing Rats After Functional Mandibular Advancements

应用组织学和组织化学的方法，对幼年ＳＤ雄性大鼠功能矫形前伸下颌后颞下颌关节盘的变化进行研究。结果显示：功能矫形前伸下颌后，关节盘胶原纤维束排列致密，前后向排列明显，纤维束粗大，关节盘后分软骨细胞增多，糖胺多糖及强硫酸化氨基己糖含量增加；未发现关节盘有病理性改变。提示关节盘承受的翼外肌张力及髁突压力增加，关节盘发生了适应性改建。

The purpose of these studies was to detect the patterns of the changes in the site of temporomandibular articular disc in the young growing SD rats after the functional protrusive appliance inserted with histologic and histochemical methods. The results showed that collagen fibres were dense, roughly paralleled linked especially anterioposteriorly after the mandible protruded functionally, chondrocytes and flycosaminoglycons contents increased apparently in the posterior band of the discs. The adaptive remodeling of the discs might be the results of the pressure of the condyle on the discs and the lateral pterygoid muscle to it. The remodeling growth of the discs were coordinate and adaptive with the proliferative changes of the condylar cartilage after the mandible protruded functionally. No pathological changes were found in the rat articular discs.