胸腰椎骨折脱位经后路长节段内固定术后力线不良及其原因分析

doi:10.13418/j.issn.1001-165x.2017.01.017

Abstract

Abstract:

Objective　 The purpose of the retrospective study is to analyzethe imbalance of the spinal sagittal and coronalalignmentfor thoracolumbar fracture-dislocations with posterior long-segment pedicle screws instrumentation.　Methods　33 patients with thoracic or lumbar type C spinal injurieswere treated with long-segment fixation which contained four or more segments. The distance of the vertebrae moving forward or backward, Cobb angle and kyphotic angle were measured prior to and after surgery by radiography, and the spinal sagittal and coronal alignment was analyzed. 33 patients were divided into the group of balanced alignment (group A) and the group of imbalanced alignment (group B). Then we discussed influence of the number of pedicle screws placed on postoperative spinal alignment.　Results　Among all patients, there were 20 cases (60.6%) with balanced alignment, others (39.4%) with imbalanced alignment. The segments of instrumentation and the total number of pedicle screws showed no obvious difference between two groups (P>0.05). As far as the number of single vertebra screws was concerned, group A was 1.7±0.3 and group B was 1.3±0.4, which showed no significant difference (P＜0.05).　Conclusions　The imbalance of the spinal alignment often happened tothoracic or lumbar dislocated fractures with long-segment instrumentation. The segments of instrumentation, the number of screws, pedicular screw and so on play an important role in postoperative spinal alignment.

Key words: Thoracolumbar fracture, Dislocated, Alignment, Long-segment instrumentation, Number of pedicle screw

WANG Xiang, CAI Yi, ZHENG Ming-hui, QU Dong-bin. The analysis of spinal alignment for thoracolumbar dislocated fractures（type C）with posterior long-segment instrumentation[J]. Chinese Journal Of Clinical Anatomy, 2017, 35(1): 85-89.

References

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The analysis of spinal alignment for thoracolumbar dislocated fractures（type C）with posterior long-segment instrumentation

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