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Influence of bone mineral density on pedicle screw fixation: a study of pedicle screw fixation augmenting posterior lumbar interbody fusion in elderly patients.骨密度对椎弓根螺钉固定的影响：一项关于老年患者椎弓根螺钉固定辅助后路腰椎椎间融合术的研究。
Spine J. 2001 Nov-Dec;1(6):402-7. doi: 10.1016/s1529-9430(01)00078-x.
2
The accuracy of pedicle screw placement in the thoracic spine using the "Funnel Technique": part 1. A cadaveric study.使用“漏斗技术”在胸椎中置入椎弓根螺钉的准确性：第1部分。尸体研究。
J Spinal Disord Tech. 2002 Dec;15(6):445-9. doi: 10.1097/00024720-200212000-00001.
3
Accuracy of cervical pedicle screw placement using the funnel technique.采用漏斗技术置入颈椎椎弓根螺钉的准确性。
Spine (Phila Pa 1976). 2001 Nov 15;26(22):2456-62. doi: 10.1097/00007632-200111150-00012.
4
Structural characteristics of the pedicle and its role in screw stability.椎弓根的结构特征及其在螺钉稳定性中的作用。
Spine (Phila Pa 1976). 1997 Nov 1;22(21):2504-9; discussion 2510. doi: 10.1097/00007632-199711010-00007.
5
Correlations between screw hole preparation, torque of insertion, and pullout strength for spinal screws.脊柱螺钉的螺钉孔制备、植入扭矩和拔出强度之间的相关性。
J Spinal Disord. 1994 Apr;7(2):139-45. doi: 10.1097/00002517-199407020-00007.
6
The effects of pedicle screw fit. An in vitro study.椎弓根螺钉适配的影响。一项体外研究。
Spine (Phila Pa 1976). 1994 Aug 1;19(15):1752-8. doi: 10.1097/00007632-199408000-00016.
7
Depth of insertion of transpedicular vertebral screws into human vertebrae: effect upon screw-vertebra interface strength.经椎弓根椎体螺钉植入人体椎体的深度：对螺钉-椎体界面强度的影响。
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8
Anatomic and technical considerations of pedicle screw fixation.椎弓根螺钉固定的解剖学及技术考量
Clin Orthop Relat Res. 1992 Nov(284):34-46.

应用于胸椎椎弓根螺钉置换的漏斗技术的生物力学研究

Biomechanical study of the funnel technique applied in thoracic pedicle screw replacement.

作者信息

Huang Yi-Jiang, Peng Mao-Xiu, He Shao-Qi, Liu Liang-Le, Dai Ming-Hai, Tang Chenxuan

机构信息

Department of Orthopaedics, the Third Affiliated Hospital of Wenzhou Medical College, Wenzhou 325200, Zhejiang, China.

出版信息

Afr Health Sci. 2014 Sep;14(3):716-24. doi: 10.4314/ahs.v14i3.30.

DOI:10.4314/ahs.v14i3.30
PMID:25352893
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4209655/
Abstract

BACKGROUND

Funnel technique is a method used for the insertion of screw into thoracic pedicle.

AIM

To evaluate the biomechanical characteristics of thoracic pedicle screw placement using the Funnel technique, trying to provide biomechanical basis for clinical application of this technology.

METHODS

14 functional spinal units (T6 to T10) were selected from thoracic spine specimens of 14 fresh adult cadavers, and randomly divided into two groups, including Funnel technique group (n = 7) and Magerl technique group (n = 7). The displacement-stiffness and pull-out strength in all kinds of position were tested and compared.

RESULTS

Two fixed groups were significantly higher than that of the intact state (P < 0.05) in the spinal central axial direction, compression, anterior flexion, posterior bending, lateral bending, axial torsion, but there were no significant differences between two fixed groups (P > 0.05). The mean pull-out strength in Funnel technique group (789.09 ± 27.33) was lower than that in Magerl technique group (P < 0.05).

CONCLUSIONS

The Funnel technique for the insertion point of posterior bone is a safe and accurate technique for pedicle screw placement. It exhibited no effects on the stiffness of spinal column, but decreased the pull-out strength of pedicle screw. Therefore, the funnel technique in the thoracic spine affords an alternative for the standard screw placement.

摘要

背景

漏斗技术是一种用于将螺钉置入胸椎椎弓根的方法。

目的

评估采用漏斗技术置入胸椎椎弓根螺钉的生物力学特性，为该技术的临床应用提供生物力学依据。

方法

从14具新鲜成年尸体的胸椎标本中选取14个功能脊柱单元（T6至T10），随机分为两组，包括漏斗技术组（n = 7）和马格尔技术组（n = 7）。测试并比较各种位置下的位移刚度和拔出强度。

结果

在脊柱中心轴向、压缩、前屈、后伸、侧弯、轴向扭转方面，两个固定组均显著高于完整状态（P < 0.05），但两个固定组之间无显著差异（P > 0.05）。漏斗技术组的平均拔出强度（789.09 ± 27.33）低于马格尔技术组（P < 0.05）。

结论

后骨入点的漏斗技术是一种安全、准确的椎弓根螺钉置入技术。它对脊柱刚度无影响，但降低了椎弓根螺钉的拔出强度。因此，胸椎漏斗技术为标准螺钉置入提供了一种替代方法。