Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (35): 6461-6465.doi: 10.3969/j.issn.2095-4344.2012.35.001

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Application of the new pedicle screw implanted stereotactic system

Wang Fang-yong, Li Jian-jun   

  1. Department of Spine and Spinal Cord Surgery, China Rehabilitation Research Center, Beijing Pok Oi Hospital, Rehabilitation Medical College of Capital Medical University, Beijing 100068, China
  • Received:2012-03-05 Revised:2012-03-21 Online:2012-08-26 Published:2012-08-26
  • Contact: Li Jian-jun, Master, Chief physician, Department of Spine and Spinal Cord Surgery, China Rehabilitation Research Center, Beijing Pok Oi Hospital, Rehabilitation Medical College of Capital Medical University, Beijing 100068, China lcrrc2008@yahoo.com.cn
  • About author:Wang Fang-yong☆, Doctor, Attending physician, Department of Spine and Spinal Cord Surgery, China Rehabilitation Research Center, Beijing Pok Oi Hospital, Rehabilitation Medical College of Capital Medical University, Beijing 100068, China wfycrrc@sina.com

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Abstract:

BACKGROUND: According to the characteristics of spinal anatomy and the measurement data based on the three-dimensional reconstructed image, the pedicle screw implanted stereotactic system has been designed and successfully applied for patent (patent No. ZL 201010123475.1).
OBJECTIVE: To investigate the application of a pedicle screw implanted stereotactic system in spine specimen operation.
METHODS: Six spine specimens were selected and divided into two groups: A and B. For group A, the implantation was under the guidance of ultra-red navigation. And for group B, the new stereotactic system was used for the operation. The CT scanning and the three-dimensional reconstruction were based on 2 mm CT scanning before operation. The parameters were calculated based on the reconstructed images. The grading of screws was based on the 2 mm criteria of Gertzbein and Robbins.
RESULTS AND CONCLUSION: For group A, 48 screws were implanted, and the results showed 41 screws were graded as Ⅰ, 5 screws were graded as Ⅱ and 2 as Ⅳ. The good rate was 96% for group A. For group B, 48 screws were implanted, and the results showed 39 screws were graded as Ⅰ, 5 as Ⅱ and 4 as Ⅲ. The good rate was 92% for group B. There was no significant difference of pedicle screws accuracy between the two groups (P > 0.05). Preliminary result shows that the accuracy of the new stereotactic system is similar to that of ultra-red navigation method.

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