J Korean Fract Soc.  2003 Jan;16(1):1-7.

Development of a Computer-assisted Surgery System for Screw Fixation of the Sacro-iliac Joint

• Yeom JS
• Choy WS
• Kim HY
• Kim WJ
• Kang JW
• Kim Y
• Kim H
• Seo D
• Lee S
• Lee JB
• Kim N
• Kim CY

Abstract

PURPOSE: The purposes of this study were to develop a computer-assisted surgery system for percutaneous screw fixation of the sacro-iliac joint and to evaluate its accuracy.
MATERIALS AND METHODS
We have developed a navigation system composed of an optical tracking device (Polaris, Northern Digital, Canada) and a personal computer. The registration error and target localization error at hybrid registration were measured using a phantom. The errors were measured 30 times for each. Sixteen 6.5 mm cannulated screws were inserted into four plastic bone models (Sawbones, USA), and the accuracy was evaluated.
RESULTS
The registration error was 0.76 +/-0.33 mm, and the target localization error was 1.43 +/-0.42 mm. All of the 16 screws were inserted well across the sacro-iliac joint, and there was neither penetration of the cortical bones nor collision between screws or washers.
CONCLUSION
The accuracy of the developed system was similar to existing ones, and its usefulness and helpfulness was proven with screw insertion into plastic bone models.

Keyword

sacro-iliac joint; separation; screw fixation; computer-assisted surgery system; intraoperative navigation system

MeSH Terms

Joints*
Microcomputers
Plastics
Surgery, Computer-Assisted*
Plastics