骨内牵张器扩宽狗下颌骨对双侧髁状突的影响  

IMPACT OF INNER BONE DISTRACTION DEVICE ON BILATERAL MANDIBULAR CONDYLAR IN WIDENING DOG MANDIBULA

作　　者：刘小明[1] 张志光[2] 郑有华[2] 廖贵清[2] 

机构地区：[1]东莞市厚街医院,广东东莞523945 [2]中山大学附属光华口腔医院,广东广州510089

出　　处：《现代医院》2007年第3期34-36,共3页Modern Hospitals

摘　　要：目的用骨内牵张器扩宽狗下颌骨中部,观察下颌正中牵张后,双侧髁状突组织病理改变,探讨手术对其影响。方法取双侧髁状突,矢状切开,分成三块(内、中、外),中间块分成前、中、后三小块,内、外两块每块分成前、后两小块。常规HE染色,观察髁状突结构改变,将其改变分成四等,记录不同组、不同部位髁状突的组织病理改变分值,统计分析。结果髁状突后、外侧及前中、内侧改建变化明显。固定1天组,变化涉及纤维层及软骨层,固定1个月和3个月组,改建涉及纤维层、软骨层和骨-软骨交界层。3个月组较1个月组变化轻。结论下颌正中牵张扩宽导致髁状突受压部位吸收改建。髁状突的变化是正常的适应性改建,处于正常的生理范围内。Objective The pathological changes of the TMJ condyle was observed at different intervals after midline distraction using bone - bared osteodistractor, in order to evaluate the effects of the distraction procedure to the bilateral TMJ condyle. Material and Method The bilateral TMJ condyle of the animal in the first part was obtained after 1 day, one month and three months post -operation. The specimen were checked by regular HE staining, The result was processed statistically by SPSS method. Results The pathological observation showed that the changes of the TMJ condyles were focused on its top and post -lateral parts, In the one -day group, only the fibrous layer and the cartilage layer were involved, while in the one - month and three - month group the fibrous layer, the cartilage layer and the bone - Cartilage interface were all involved. Conclusion The distraction osteogenesis can cause modification of the condyle. The bone of the post - lateral part of the condyle was absorbed and obvious bone formation can be observed at the peripheral part of the absorption site.

关 键 词：下颌骨 牵张成骨 狗 扩宽 

分 类 号：R782.6[医药卫生—口腔医学]