CT重建评价颈椎螺纹融合器植骨融合的可行性研究

The Evaluation of the Bone Fusion in the Cervical Interbody Threaded Cage by CT Reconstruction

目的:探索利用CT重建评价颈椎螺纹融合器植骨融合的可行性。方法:随访因颈椎病行颈椎螺纹融合器+钛板植入术后患者51例,随访时间6～15个月,其中男32例,女19例,平均年龄(45.4±2.4)岁,于术后7天摄颈椎正侧位X线片,随访时摄颈椎过曲过伸位和正侧位X线片,并行颈椎CT重建,分别采用X线法和CT重建法评价植骨融合情况,CT法分优、良、差三级。结果:X线法观察植骨融合率为100%,CT重建法观察植骨融合率为94.1%,两种方法经统计学分析无显著差异(P>0.05)。结论:在对植骨融合进行评估时,和X线相比,CT重建法更加准确和直观,能对植骨融合生长情况进行了解,值得临床推广。

Objective: To evaluate the bone graft fusion in the cervical threaded cage and search for a better assessment method. Methods: To follow up 51 patients having undergone the cervical threaded cage plus internal fixed plate system for 6 to 15 months, average age of 45 years, 32 male, 19 female. To take the anterior and posterior, lateral plain radiographs within 1 week post operation, and to take the both positions plain radiographs above plus flexion and extension dynamic plain radiographs when followed up, also with the CT reconstructions of the cervical vertebra, by which the condition of bone fusion could be classified as excellent, good and poor three grades, then we will analyze the result by both methods. Results: The rate of the bone graft fusion was 100% by plain radiograph and 94.1% by CT reconstruction. No statistical significant difference was found between the two methods. Conclusion: The CT reconstruction method seems more visualized, accurate, and objective than plain radiograph in evaluating the bone fusion of the cervical cage and could observe the specialized way of the bone graft growth, find the poor growth with no internal fixed system displacement yet hardly be found by plain radiograph.