下颌骨单侧牵张成骨对颞下颌关节的影响  

Influence of unilateral mandibular distraction osteogenesis on temporomandibular joint

作　　者：孙建壮[1] 刘彦普[2] 刘锐[2] 赵晋龙[2] 商洪涛[2] 

机构地区：[1]解放军第181医院口腔科,广西桂林541002 [2]第四军医大学口腔医学院颌面外科,陕西西安710032

出　　处：《中国美容医学》2006年第8期942-944,i0008,共4页Chinese Journal of Aesthetic Medicine

摘　　要：目的:研究下颌骨单侧牵张成骨对颞下颌关节的影响。方法:新西兰大白兔25只,24只行单侧下颌牵张,随机分为两组:一组牵张速率为0.5mm×2次/天(1mm组);另一组为0.5mm×4次/天(2mm组),间歇期均为5天,牵张长度均为10mm。在牵张完成后0周、2周、4周、8周每组各处死3只动物,最后1只处死做对照,4%多聚甲醛灌注固定,取双侧关节盘和髁状突,做大体观察及组织学观察。结果:牵张后大体观察可见关节盘无显著形态异常,髁状突有不同程度适应性改建;组织学主要表现为关节盘不同程度中带变薄,纤维走行改变,血管侵入,后带变厚;髁状突表现为纤维软骨组织形态学的改变和软骨、骨的改建活动,2mm/日组可见破坏现象发生。结论:颞下颌关节有很强的改建能力,在合适的牵张速度下可通过发生适应性改建,使髁状突在形态和结构上适应新的位置和环境,从而继续行使正常关节功能。Objective To investigate the influence of unilateral mandibular distraction osteogenesis on temporomandibular joint. Methods 25 New Zealand rabbits were used.24 of them were unilaterally distracted, which were divided into two groups.one group was distracted by 2×0.5mm/d for 10 days （1mm group）,the other was distracted by 4×0.5mm/d for 5 days （2mm group）, 5 days as latency period.Three rabbits were sacrificed each group respectively at 0.2nd,4th and 8th week after the completing of distraction,the last one was sacrificed as control,made thin section,stained and observed the chang of histological examination. Results After lengthing, obviously histological variety was observed on the sections of condyloid process and intercondylar disc,but it could be repaired under lmm/d distraction rate. Conclusion The TMJ has strong capability of remodeling,this capability can make condyloid process fit the new condition.

关 键 词：牵张成骨 颞下颌关节 适应性改建 

分 类 号：R782.63[医药卫生—口腔医学]