The Experts below are selected from a list of 2154 Experts worldwide ranked by ideXlab platform
Jie Yao - One of the best experts on this subject based on the ideXlab platform.
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effect of tibial Drill Guide angle on the mechanical environment at bone tunnel aperture after anatomic single bundle anterior cruciate ligament reconstruction
International Orthopaedics, 2014Co-Authors: Jie Yao, Ming Zhang, Jason Takma Cheung, K Y ChiuAbstract:Purpose The tibial Drill-Guide angle in anterior cruciate ligament (ACL) reconstruction influences the tunnel placement and graft-tunnel force, and is potentially associated with post-operative tunnel widening. This study aimed to examine the effect of the Drill-Guide angle on the stress redistribution at the tibial tunnel aperture after anatomic single-bundle ACL reconstruction.
Hongwei Wang - One of the best experts on this subject based on the ideXlab platform.
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feasibility and accuracy of computer assisted individual Drill Guide template for minimally invasive lumbar pedicle screw placement trajectory
Injury-international Journal of The Care of The Injured, 2018Co-Authors: Hongwei Wang, Yusheng Liu, Yiwen Zhao, Guoli Song, Jun Liu, Jianda Han, Liangbi XiangAbstract:Abstract Objective To discuss the feasibility and accuracy of a specific computer-assisted individual Drill Guide template (CIDGT) for minimally invasive lumbar pedicle screw placement trajectory (MI-LPT) through a bovine cadaveric experimental study. Design A 3-D reconstruction model, including lumbar vertebras (L1–L5), was generated, and the optimal MI-LPTs were determined. A Drill Guide template with a surface made of the antitemplate of the vertebral surface, including the spinous process and the entry point vertebral surface, was created by reverse engineering and rapid prototyping techniques. Then, MI-LPTs were determined by the Drill Guide templates, and the trajectories made by K-wires were observed by postoperative CT scan. Setting General Hospital of Shenyang Military Area Command of Chinese PLA. Results In total, 150 K-wires for MI-LPTs were successfully inserted into L1-L5. The required mean time and fluoroscopy times between fixation of the template to the spinous process, entry point vertebral surface, and insertion of the K-wires for minimally invasive lumbar pedicle screw placement trajectories into each vertebra were 79.4 ± 15.0 s and 2.1 ± 0.8 times. There were no significant differences between the preoperative plan and postoperative assessment in the distance from the puncture to the midline and inclination angles according to the different levels (P > 0.05, respectively). The mean deviation between the preoperative plan and postoperative assessment in the distance from the puncture to the midline and inclination angles were 0.8 ± 0.5 mm and 0.9 ± 0.5°, respectively. Conclusions The potential use of the novel CIDGT, which was based on the unique morphology of the lumbar vertebra to place minimally invasive lumbar pedicle screws, is promising and could prevent too much radiation exposure intraoperatively.
K Y Chiu - One of the best experts on this subject based on the ideXlab platform.
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effect of tibial Drill Guide angle on the mechanical environment at bone tunnel aperture after anatomic single bundle anterior cruciate ligament reconstruction
International Orthopaedics, 2014Co-Authors: Jie Yao, Ming Zhang, Jason Takma Cheung, K Y ChiuAbstract:Purpose The tibial Drill-Guide angle in anterior cruciate ligament (ACL) reconstruction influences the tunnel placement and graft-tunnel force, and is potentially associated with post-operative tunnel widening. This study aimed to examine the effect of the Drill-Guide angle on the stress redistribution at the tibial tunnel aperture after anatomic single-bundle ACL reconstruction.
Jan Victor - One of the best experts on this subject based on the ideXlab platform.
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peak stresses shift from femoral tunnel aperture to tibial tunnel aperture in lateral tibial tunnel acl reconstructions a 3d graft bending angle measurement and finite element analysis
Knee Surgery Sports Traumatology Arthroscopy, 2017Co-Authors: Hans Van Der Bracht, Thomas Tampere, Pieter Beekman, Alexander Schepens, Wouter Devriendt, Peter Verdonk, Jan VictorAbstract:To investigate the effect of tibial tunnel orientation on graft-bending angle and stress distribution in the ACL graft. Eight cadaveric knees were scanned in extension, 45°, 90°, and full flexion. 3D reconstructions with anatomically placed anterior cruciate ligament (ACL) grafts were constructed with Mimics 14.12®. 3D graft-bending angles were measured for classic medial tibial tunnels (MTT) and lateral tibial tunnels (LTT) with different Drill-Guide angles (DGA) (45°, 55°, 65°, and 75°). A pivot shift was performed on 1 knee in a finite-element analysis. The peak stresses in the graft were calculated for eight different tibial tunnel orientations. In a classic anatomical ACL repair, the largest graft-bending angle and peak stresses are seen at the femoral tunnel aperture. The use of a different DGA at the tibial side does not change the graft-bending angle at the femoral side or magnitude of peak stresses significantly. When using LTT, the largest graft-bending angles and peak stresses are seen at the tibial tunnel aperture. In a classic anatomical ACL repair, peak stresses in the ACL graft are found at the femoral tunnel aperture. When an LTT is used, peak stresses are similar compared to classic ACL repairs, but the location of the peak stress will shift from the femoral tunnel aperture towards the tibial tunnel aperture. Clinical relevance: the risk of graft rupture is similar for both MTTs and LTTs, but the location of graft rupture changes from the femoral tunnel aperture towards the tibial tunnel aperture, respectively. I.
Liangbi Xiang - One of the best experts on this subject based on the ideXlab platform.
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feasibility and accuracy of computer assisted individual Drill Guide template for minimally invasive lumbar pedicle screw placement trajectory
Injury-international Journal of The Care of The Injured, 2018Co-Authors: Hongwei Wang, Yusheng Liu, Yiwen Zhao, Guoli Song, Jun Liu, Jianda Han, Liangbi XiangAbstract:Abstract Objective To discuss the feasibility and accuracy of a specific computer-assisted individual Drill Guide template (CIDGT) for minimally invasive lumbar pedicle screw placement trajectory (MI-LPT) through a bovine cadaveric experimental study. Design A 3-D reconstruction model, including lumbar vertebras (L1–L5), was generated, and the optimal MI-LPTs were determined. A Drill Guide template with a surface made of the antitemplate of the vertebral surface, including the spinous process and the entry point vertebral surface, was created by reverse engineering and rapid prototyping techniques. Then, MI-LPTs were determined by the Drill Guide templates, and the trajectories made by K-wires were observed by postoperative CT scan. Setting General Hospital of Shenyang Military Area Command of Chinese PLA. Results In total, 150 K-wires for MI-LPTs were successfully inserted into L1-L5. The required mean time and fluoroscopy times between fixation of the template to the spinous process, entry point vertebral surface, and insertion of the K-wires for minimally invasive lumbar pedicle screw placement trajectories into each vertebra were 79.4 ± 15.0 s and 2.1 ± 0.8 times. There were no significant differences between the preoperative plan and postoperative assessment in the distance from the puncture to the midline and inclination angles according to the different levels (P > 0.05, respectively). The mean deviation between the preoperative plan and postoperative assessment in the distance from the puncture to the midline and inclination angles were 0.8 ± 0.5 mm and 0.9 ± 0.5°, respectively. Conclusions The potential use of the novel CIDGT, which was based on the unique morphology of the lumbar vertebra to place minimally invasive lumbar pedicle screws, is promising and could prevent too much radiation exposure intraoperatively.
