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不同螺杆设计对抗旋转扭矩的影响：三种传统螺杆结构的生物力学比较。

The effect of different screw-rod design on the anti-rotational torque: a biomechanical comparison of three conventional screw-rod constructs.

作者信息

Huang Zifang, Wang Chongwen, Fan Hengwei, Sui Wenyuan, Li Xueshi, Wang Qifei, Yang Junlin

机构信息

Department of Orthopaedics, The 1st Affiliated Hospital of Sun Yat-sen University, NO.58, Zhongshan Er Road, Guangzhou, Guangdong, China.

出版信息

BMC Musculoskelet Disord. 2017 Jul 28;18(1):322. doi: 10.1186/s12891-017-1683-1.

DOI:10.1186/s12891-017-1683-1
PMID:28754114
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5534095/
Abstract

BACKGROUND

Screw-rod constructs have been widely used to correct spinal deformities, but the effects of different screw-rod systems on anti-rotational torque have not been determined. This study aimed to analyze the biomechanical effect of different rod-screw constructs on anti-rotational torque.

METHODS

Three conventional spinal screw-rod systems (Legacy, RF-F-10 and USSII) were used to test the anti-rotational torque in the material test machine. ANOVA was performed to evaluate the anti-rotational capacity of different pedicle screws-rod constructs.

RESULTS

The anti-rotational torque of Legacy group, RF-F-10 group and USSII group were 12.3 ± 1.9 Nm, 6.8 ± 0.4 Nm, and 3.9 ± 0.8 Nm, with a P value lower than 0.05. This results indicated that the Legacy screws-rod construct could provide a highest anti-rotation capacity, which is 68% and 210% greater than RF-F-10 screw-rod construct and USSII screw-rod respectively.

CONCLUSIONS

The anti-rotational torque may be mainly affected by screw cap and groove design. Our result showed the anti-rotational torque are: Legacy system > RF-F-10 system > USSII system, suggesting that appropriate rod-screw constructs selection in surgery may be vital for anti-rotational torque improvement and preventing derotation correction loss.

摘要

背景

螺钉-棒系统已广泛用于矫正脊柱畸形，但不同螺钉-棒系统对抗旋转扭矩的影响尚未确定。本研究旨在分析不同棒-螺钉结构对抗旋转扭矩的生物力学效应。

方法

使用三种传统的脊柱螺钉-棒系统（Legacy、RF-F-10和USSII）在材料试验机上测试抗旋转扭矩。进行方差分析以评估不同椎弓根螺钉-棒结构的抗旋转能力。

结果

Legacy组、RF-F-10组和USSII组的抗旋转扭矩分别为12.3±1.9 Nm、6.8±0.4 Nm和3.9±0.8 Nm，P值低于0.05。该结果表明，Legacy螺钉-棒结构可提供最高的抗旋转能力，分别比RF-F-10螺钉-棒结构和USSII螺钉-棒高68%和210%。

结论

抗旋转扭矩可能主要受螺帽和凹槽设计的影响。我们的结果显示抗旋转扭矩为：Legacy系统＞RF-F-10系统＞USSII系统，这表明手术中选择合适的螺钉-棒结构对于提高抗旋转扭矩和防止旋转矫正丢失可能至关重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/724c03762d5f/12891_2017_1683_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/e36b936360d8/12891_2017_1683_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/4b5e09308b79/12891_2017_1683_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/ec3fa1e8907d/12891_2017_1683_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/5e0f9d52152f/12891_2017_1683_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/724c03762d5f/12891_2017_1683_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/e36b936360d8/12891_2017_1683_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/4b5e09308b79/12891_2017_1683_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/ec3fa1e8907d/12891_2017_1683_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/5e0f9d52152f/12891_2017_1683_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5114/5534095/724c03762d5f/12891_2017_1683_Fig5_HTML.jpg

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本文引用的文献

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Bilateral apical vertebral derotation technique by vertebral column manipulation compared with vertebral coplanar alignment technique in the correction of Lenke type 1 idiopathic scoliosis.与椎体共面排列技术相比，通过脊柱手法进行双侧顶椎去旋转技术在矫正Lenke 1型特发性脊柱侧凸中的应用
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