关键词：猪，雏形；颌骨折；生物力学；骨密度
摘要 目的: 探讨髁突横断骨折对幼年小型猪下颌骨骨密度及对抗压强度的影响。方法: 中国实验用小型猪12头，造成左侧髁突横断骨折模型，在术后6月应用双能X线骨密度仪及生物力学方法检测下颌骨。结果: 髁突横断骨折后引起下颌骨骨密度及生物力学性能轻度下降，但与健侧比较无明显差异。结论: 幼年小型猪髁突横断骨折对下颌骨骨矿含量影响不大。
BONE DENSITY ANDBIOMECHANICAL CHANGES OF MANDIBLE
AFTER TRANSVERSE FRACTURE OF MANDIBULAR CONDYLE
IN CHILDHOOD MINIATURE PIG
YaoJun,Tian Huiying, Zhou Jilin,et al
(Department ofStomatology,General Hospital of PLA,Beijing 100853)
Abstract Objective： To evaluate the effect of mandible in the childhood miniature pigmodel of transverse fracture of mandibular condyle.Methods ： We used 12 childhood miniature pigs for development of transversefracture of mandibular condyle as the model.The bone density and biomechanical changes ofmandible were observed in the model by using dual-energy X-ray bone densitometer andbiological mechanics six months after operation.Results ： After transverse fracture of mandibular condyle,mandible bonedensity and mechanical function were reduced,but there was not apparent difference onopposite side comparison.Conclusion ： Sixmonths after the childhood miniature pig transverse fracture of mandibular condyle,thereare little bone density and biomechanical changes in mandible.
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