当骨结合率大于或等于60%时，颈部皮质骨处应力值明显下降。
The stress of cortical bone area around implant neck decreased significantly when the bone contact ratio was equal or more than 60%.
结论骨原发性非何杰金氏淋巴瘤有其相对特征性的X线表现，再结合临床有关资料，可望提高该病的准确诊断率。
Conclusion PNHL of bone has characteristic X-ray manifestations comparatively. The correct diagnostic rate can be improved if we concern about clinical data.
结论：对于胸腰段爆裂骨折的患者，后路短节段椎弓根钉内固定不结合后外侧植骨融合可增加内固定失败的发生率。
Conclusion: For patients with thoracolumbar burst fractures, posterior short-segment pedicle screws fixation without fusion can increase the risk of implant failure.
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