犬股骨髁松质骨挤压后愈合过程的X线影像观察

An X-ray observation of cancellous bone in femoral condyle of dog after being compressed

目的通过建立松质骨挤压的动物模型,模拟临床种植体挤压植入术,观察松质骨挤压后愈合过程的形态学变化。方法以犬股骨髁松质骨为拟挤压部位,选择敲击挤压法,使用自行研制的挤压器,按照不同的挤压程度进行逐级挤压、备洞,植入与种植窝直径相同的自行加工的圆柱状纯钛种植体。按照不同观察时期处死动物,采用数码X线片对种植体周松质骨骨小梁形态进行观察。结果X线片显示,挤压后种植窝的松质骨骨小梁排列致密,挤压程度越大,种植体周骨密度增加越明显,种植体周可见较高密度影像。受到挤压的骨小梁围绕种植体弯曲排列,随着愈合时间的延长,骨小梁排列趋于正常。结论骨挤压技术在一定时期内能够明显提高种植窝周松质骨的骨密度,可能有益于提高种植体的初期稳定性。

Objective This study simulated clinical implant surgery using squeeze technique by establishing a rational animal model. We investigated the X-ray image in order to observe the agglutination of the cancellous bone after being compressed. Methods The cancellous bone in condyles of femur of dog had been chosen as the experimental position, prepared the implant holes using squeeze technique according to different compressing extent, and then insetted the corresponding implants into them. After different healing periods, the dogs were sacrificed and the X-ray images were got and observed. Results The cancellous bone in X-ray image shows apparent eburnation and favourable agglutination after being compressed. The differences grow down gradually along with the extend of healing time. Conclusion The clinical implant surgery using squeeze technique is in favor of obtaining primary stabilities of implants.