We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A novel computer-assisted drill guide template for thoracic pedicle screw placement: a cadaveric study.
- Authors
Ma, Tao; Xu, Yong-Qing; Cheng, Yu-Bin; Jiang, Mu-Yao; Xu, Xing-Ming; Xie, Le; Lu, Sheng
- Abstract
Introduction: The objective of this study was to develop a novel, patient-specific, navigational template for thoracic pedicle screw placement. Methods: Twenty thoracic cadaver specimens were randomly divided into two groups of 10: the navigational template group and the free-hand group. A volumetric CT scan was performed on each thoracic vertebra, and a three-dimensional reconstruction model was generated. A drill template was designed with a surface that was the inverse of the posterior vertebral surface. Each drill template and its corresponding vertebra were manufactured using a rapid prototyping technique and tested for violation. Two hundred and forty screws were implanted into the thoracic spines and the positions of the screws were evaluated. Results: Two hundred and forty thoracic screws were inserted using either the navigational template method or the free-hand method. The accuracy rate and incidence of risk for setting thoracic pedicle screws differed statistically between the two methods ( P < 0.05): The navigational template method had a higher accuracy rate and a lower incidence of risk than the free-hand method. Moreover, the free-hand method had a significant learning curve, whereas a learning curve for the navigational template method was not obvious. Conclusion: We have developed a novel, patient-specific, navigational template for thoracic pedicle screw placement with good applicability and high accuracy.
- Subjects
THORACIC vertebrae; PEDICLE flaps (Surgery); COMPUTER-assisted surgery; RAPID prototyping; TOMOGRAPHY
- Publication
Archives of Orthopaedic & Trauma Surgery, 2012, Vol 132, Issue 1, p65
- ISSN
0936-8051
- Publication type
Article
- DOI
10.1007/s00402-011-1383-5