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Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 540 - 540
1 Sep 2012
Wang M Li H Hoey K Hansen E Niedermann B Helming P Wang Y Aras E Schattiger K Bunger C
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Study design: We conducted a prospective cohort study of 448 patients with a variety of spinal metastases.

Objective

To compare the predictive value of the Tokuhashi scoring system (T12) and its revised edition (T15) for life expectancy both in the entire study group as well as in the various primary tumor subgroups.

Summary of background data

In 1990 Tokuhashi and coworkers formulated a one point-addition-type prognostic scoring system with a total sum of 12 points for preoperative prediction of life expectancy as an adjunct in selecting appropriate treatment. Because the site of the primary tumor influences ultimate survival, the scoring system was revised in 2005 to a total sum of 15 points based on the origin of the primary tumor.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 106 - 106
1 Sep 2012
Xie J Wang Y Yang Z Zhang Y
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Introduction

To introduce a new classification method and analyze related risk factor about lateral wall perforation associated with lower cervical pedicle screw and free-hand insertion technique.

Methods

A Retrospective study was made to analyze 214 patients (1024 screws) with various cervical spine disorders, involved in pedicle screw instrumentation at C3-7 from July 2004 to July 2009. Researchers assessed the position of the screws in the pedicle by carefully probing intraoperatively and studying postoperative thin-slice computed tomography scan. Perforation of lateral wall was classified into two phases. Phase I refers to the burst of the pedicle by screw, which means that the length of screw threads penetrating the external cortex of pedicles on CT scan is 2 mm, whereas in Phase, the length is >2 mm. The Penetrated screws and related factors were analyzed though Backward Stepwise (Wald) Logistic regression.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 178 - 178
1 Sep 2012
Wang Y Bunger C Hansen E Hoy K Wu C
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Objective

To identify risk factors for the presence of distal adding-on in Lenke 1A scoliosis and compare different treatment strategies.

Summary of Background Data

Distal adding-on is often accompanied by unsatisfactory clinical outcome and high risk of reoperation. However, very few studies have focused on distal adding-on and its attendant risk factors and optimal treatment strategies remain controversial.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 74 - 74
1 Sep 2012
Wang Y Xiao S Zhang Y Zhang X Wang Z Zheng G
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Study Design

Retrospective review.

Objective

To report the technique and results of vertebral column decancellation (VCD) for the management of sharp angular spinal deformity.