Transpedicle Osteotomy Positioning in Pedicle‐lengthening Laminoplasty

The objective of this study was to examine in vitro whether fluoroscopic positioning could be used to guide the osteotomy and to define the cutting site in the pedicle‐lengthening laminoplasty in relation to the posterior vertebral line. It was found that the osteotomy site was from 2.0 to 3.5 mm posterior to the posterior vertebral line. The maximum difference between the measured value and that theoretically simulated on 3‐dimensional (3D) computed tomography reconstruction was 0.3 mm. The spinal canal cross‐sectional area was significantly enlarged after pedicle‐lengthening. Accurate placement of the osteotomy is critical in pedicle‐lengthening laminoplasty. Guiding the positioning of the osteotomy based on the posterior vertebral line images provides satisfactory accuracy, suggesting a possible clinical application for our technique; however, further verification in vivo is needed.

Source: Orthopaedic Surgery - November 27, 2014 Category: Orthopaedics Authors: Zhi‐gang Zhang, Xin Mei, Wen Zhang, Peng Liu, Mao‐feng Gao, Hui‐lin Yang, Zong‐ping Luo Tags: SURGICAL TECHNIQUE Source Type: research