自体骨游离移植的电镜观察

目的 探讨颅顶部自体骨游离移植被吸收摧在机制。方法 ２４只成年新西兰白兔随机均分为二组，自身同体对照。取自体颅骨及肋骨分别游离移植于颅顶部骨膜下左右侧，术后１２周及２４周行扫描电镜观察移植骨的胶原纤丝。结果 术后１２周，颅骨及肋骨胶原纤丝数量少、稀疏，空间排列混乱，两者相比，颅骨优于肋骨；术后２４周，两者骨胶原纤丝数量及排列接近，类似于受区正常成熟骨。结论 颅骨较早完成塑形改造，术后２４周颅骨及肋

Scanning Electron Microscopic Observation on Bone Auto-Graft in Cranium

Objective To study absorbed mechanism of free bone auto-graft in cranium. Methods Twenty-four adult New Zealand rabbits were randomly divided into two groups of twelve each. Cranium graft or rib graft was implanted on each side of the cranium. The onlay graft was harvested at the 12th and 24th week, and the collagen fibers were scrutinized under scanning electron microscope. Results The number of the bone collagen fibrils at twenty-fourth week was more than that of the twelfth week, the arrangement of collagen fibrils at the twenty-fourth week was more regular than that of the twelfth week, and the collagen fibrils of the cranium graft were more numberous and regular than those of the rib graft observed at the twelfth week, but they were similar at twenty-fourth week. Conclusion Remoding time of cranium graft is shorter than that of rib graft, but bone remoding of both cranium and rib has finished in 24th week after operated.