Guide for Navigating 3D-Printed Cortical Bone Trajectory Screws in Situations with Previously Instrumented Pedicle Screws.

IF 1.3 4区医学 Q3 ORTHOPEDICS

Indian Journal of Orthopaedics Pub Date : 2026-03-25 eCollection Date: 2026-06-01 DOI:10.1007/s43465-026-01764-8

Wei-Che Tai, Jen-Chung Liao

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引用次数: 0

Abstract

Purpose: Traditional surgical interventions for adjacent segment disease (ASD) repair commonly mandate the exposure of all pre-existing hardware. Cortical bone trajectory (CBT) screws have been innovated to amplify the contact surface between the screw and cortical bone, offering a promising approach to mitigate the challenge sassociated with traditional ASD repair surgeries.

Methods: In this study, a tangible manifestation of the cortical bone trajectory screw navigation guide was produced by utilizing a 3D printer to facilitate the insertion of cortical bone trajectory screws. A comprehensive set of radiographic images and computed tomography scans was gathered to evaluate the accuracy of K-wire through CBT screw guide inside the vertebrae which was previously implanted with a pedicle screw.

Results: The variance in the K-pin circle centre distance before and after surgery ranges from 0.2 mm to 3.54 mm. The K-pin angle difference falls within the range of 0.4° to 5.8° in the sagittal plane, ranges from 1.46° to 1.7° in the transverse plane.

Conclusion: This research process has successfully yielded a navigation guide that holds promise for inserting CBT screw even with previously pedicle screw at the same vertebrae.

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指南导航3d打印皮质骨轨迹螺钉在情况下与以前仪器椎弓根螺钉。

目的：邻段疾病（ASD）修复的传统手术干预通常要求暴露所有预先存在的硬件。皮质骨轨迹（CBT）螺钉已被创新，以扩大螺钉与皮质骨之间的接触面，为减轻传统ASD修复手术相关的挑战提供了一种有希望的方法。方法：本研究利用3D打印机制作皮质骨轨迹螺钉导航导轨实物，方便皮质骨轨迹螺钉置入。我们收集了一套全面的x线图像和计算机断层扫描，以评估通过CBT螺钉导钉在椎骨内植入椎弓根螺钉的k -钢丝的准确性。结果：手术前后k针圈中心距的变化范围为0.2 mm ~ 3.54 mm。K-pin角差在矢状面为0.4°~ 5.8°，横切面为1.46°~ 1.7°。结论：该研究过程成功地产生了一种导航指南，有望在同一椎骨插入CBT螺钉，即使先前有椎弓根螺钉。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Indian Journal of Orthopaedics ORTHOPEDICS-

CiteScore

1.80

自引率

0.00%

发文量

185

审稿时长

9 months

期刊介绍： IJO welcomes articles that contribute to Orthopaedic knowledge from India and overseas. We publish articles dealing with clinical orthopaedics and basic research in orthopaedic surgery. Articles are accepted only for exclusive publication in the Indian Journal of Orthopaedics. Previously published articles, articles which are in peer-reviewed electronic publications in other journals, are not accepted by the Journal. Published articles and illustrations become the property of the Journal. The copyright remains with the journal. Studies must be carried out in accordance with World Medical Association Declaration of Helsinki.