Regional Hounsfield unit measurement of screw trajectory for predicting pedicle screw fixation using cortical bone trajectory: a retrospective cohort study

2017 ◽  
Vol 160 (2) ◽  
pp. 405-411 ◽  
Author(s):  
Keitaro Matsukawa ◽  
Yuichiro Abe ◽  
Yoshihide Yanai ◽  
Yoshiyuki Yato
Keyword(s):  
Cohort Study ◽  
Cortical Bone ◽  
Pedicle Screw ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Screw Fixation ◽  
Hounsfield Unit ◽  
Pedicle Screw Fixation ◽  
Cortical Bone Trajectory

scholarly journals Novel placement of cortical bone trajectory screws in previously instrumented pedicles for adjacent-segment lumbar disease using CT image-guided navigation

2014 ◽  
Vol 36 (3) ◽  
pp. E9 ◽  
Author(s):  
Analiz Rodriguez ◽  
Matthew T. Neal ◽  
Ann Liu ◽  
Aravind Somasundaram ◽  
Wesley Hsu ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Pedicle Screw ◽  
Screw Fixation ◽  
Lumbar Fusion ◽  
Pedicle Screw Fixation ◽  
Adjacent Segment ◽  
Average Hospital ◽  
Cortical Bone Trajectory ◽  
Image Guided

Object Symptomatic adjacent-segment lumbar disease (ASLD) after lumbar fusion often requires subsequent surgical intervention. The authors report utilizing cortical bone trajectory (CBT) pedicle screw fixation with intraoperative CT (O-arm) image-guided navigation to stabilize spinal levels in patients with symptomatic ASLD. This unique technique results in the placement of 2 screws in the same pedicle (1 traditional pedicle trajectory and 1 CBT) and obviates the need to remove preexisting instrumentation. Methods The records of 5 consecutive patients who underwent lumbar spinal fusion with CBT and posterior interbody grafting for ASLD were retrospectively reviewed. All patients underwent screw trajectory planning with the O-arm in conjunction with the StealthStation navigation system. Basic demographics, operative details, and radiographic and clinical outcomes were obtained. Results The average patient age was 69.4 years (range 58–82 years). Four of the 5 surgeries were performed with the Minimal Access Spinal Technologies (MAST) Midline Lumbar Fusion (MIDLF) system. The average operative duration was 218 minutes (range 175–315 minutes). In the entire cohort, 5.5-mm cortical screws were placed in previously instrumented pedicles. The average hospital stay was 2.8 days (range 2–3 days) and there were no surgical complications. All patients had more than 6 months of radiographic and clinical follow-up (range 10–15 months). At last follow-up, all patients reported improved symptoms from their preoperative state. Radiographic follow-up showed Lenke fusion grades of A or B. Conclusions The authors present a novel fusion technique that uses CBT pedicle screw fixation in a previously instrumented pedicle with intraoperative O-arm guided navigation. This method obviates the need for hardware removal. This cohort of patients experienced good clinical results. Computed tomography navigation was critical for accurate CBT screw placement at levels where previous traditional pedicle screws were already placed for symptomatic ASLD.

scholarly journals A biomechanical comparison between cortical bone trajectory fixation and pedicle screw fixation

2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Hiroki Oshino ◽  
Toshihiko Sakakibara ◽  
Tadashi Inaba ◽  
Takamasa Yoshikawa ◽  
Takaya Kato ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Pedicle Screw ◽  
Screw Fixation ◽  
Pedicle Screw Fixation ◽  
Cortical Bone Trajectory ◽  
Biomechanical Comparison

scholarly journals Minimally Invasive Lumbar Pedicle Screw Fixation Using Cortical Bone Trajectory: Functional Outcomes

Cureus ◽  
2018 ◽  
Author(s):  
Yiren Chen ◽  
Sayantan Deb ◽  
Rashad Jabarkheel ◽  
Lan Pham ◽  
Mahesh Patel ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Cortical Bone ◽  
Pedicle Screw ◽  
Functional Outcomes ◽  
Screw Fixation ◽  
Pedicle Screw Fixation ◽  
Cortical Bone Trajectory ◽  
Lumbar Pedicle
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