中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (4): 593-596.doi: 10.3969/j.issn.1673-8225.2011.04.006

• 数字化骨科 digital orthopedics • 上一篇    下一篇

计算机重建技术辅助胸椎椎弓根钉置入的准确性

未东兴,张  震,王九辉   

  1. 锦州市中心医院骨科,辽宁省锦州市 121000
  • 收稿日期:2010-09-26 修回日期:2010-12-15 出版日期:2011-01-22 发布日期:2011-01-22
  • 作者简介:未东兴,男,1980年生,辽宁省凌海市人,汉族,2004年辽宁医学院毕业,主治医师,主要从事骨折内固定研究。 yunshengma@ 126.com

Accuracy of thoracic pedicle screw placement based on computer-aided reconstruction technique

Wei Dong-xing, Zhang Zhen, Wang Jiu-hui   

  1. Department of Orthopaedics, Jinzhou Central Hospital, Jinzhou  121000, Liaoning Province, China
  • Received:2010-09-26 Revised:2010-12-15 Online:2011-01-22 Published:2011-01-22
  • About author:Wei Dong-xing, Attending physician, Department of Orthopaedics, Jinzhou Central Hospital, Jinzhou 121000, Liaoning Province, China yunshengma@126. com

摘要:

背景:由于椎骨周围组织关系复杂,使得胸椎椎弓根钉置入成功率不是很理想。随着更精密的成像设备的出现,骨科术前检查变得更清晰,准确。借助数字化成像设备势必要提高椎弓根钉置入准确性。
目的:比较分析螺旋CT计算机三维重建辅助指导技术与传统徒手技术置入胸椎椎弓根钉成功率及准确性的差异。
方法:纳入56例胸椎损伤患者,内固定前根据患者意愿选择置钉方式,三维重建辅助组及传统徒手组各28例。置钉前三维重建辅助组患者全部采用128排高分辨率CT对胸椎进行扫描,得到的数据输入计算机数据库,根据软件生成的三维立体图像,模拟手术路径和置钉参数。传统徒手组患者行普通X射线和CT检测,不应用三维重建辅助组的重建和模拟功能。所有病例记录置钉成功率,内固定后再次进行螺旋CT扫描评估置钉准确性。
结果与结论:与传统徒手组比较,三维重建辅助组置钉成功率显著提高(P < 0.05),椎弓根穿破率显著降低(P < 0.05)。提示利用螺旋CT三维重建技术辅助胸椎椎弓根钉内固定,可以明显提高椎弓根钉置入的成功率和准确性。

关键词: 三维重建, 计算机体层摄影, 胸椎, 椎弓根钉, 数字化骨科技术

Abstract:

BACKGROUND: The achievement ratio of thoracic pedicle screw placement is not ideal, because of the complex environment surround vertebrae. With the sophisticated image equipment development, preoperative orthopedics examination becomes clearer and accurate.
OBJECTIVE: To compare the success rate and accuracy of thoracic pedicle screw placement achieved by screw insertion assisted by spiral CT image three dimensional reconstruction technique and the conventional free hand placement technique.
METHODS: A total of 56 patients with thoracic vertebrae injury were included. According to patients’ will to select placement means before internal fixation, three-dimensional reconstruction-aided group and conventional free hand technique group of 28 cases, respectively. All patients in three-dimensional reconstruction-aided group were treated with thoracic vertebrae scanning by high-resolution spiral CT, the data entered into computer database. According to software-generated three-dimensional images, surgical path and pedicle screw parameters were stimulated. Patients in conventional free hand technique group underwent ordinary X-ray and CT detection, reconstruction and stimulation function in three-dimensional reconstruction-aided group were not applied. The success rate of pedicle screws in all cases was recorded. The accuracy of pedicle screws was evaluated again by spiral CT scanning after internal fixation. 
RESULTS AND CONCLUSION: Compared with conventional free hand technique group, the success rate of thoracic screw placement in three-dimensional reconstruction-aided group was significantly increased (P < 0.05), the pedicle perforation rate was significantly reduced (P < 0.05). It is indicated that thoracic pedicle screw internal fixation with spiral CT three-dimensional reconstruction-aided technology can significantly improve the success rate and accuracy of thoracic screw placement.

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