The influence of three kinds of internal fixator on blood supply of scaphoid bone: a computer-aided study

中华手外科杂志 Pub Date : 2020-02-10 DOI:10.3760/CMA.J.ISSN.1005-054X.2020.01.014

Xulin Zhang, Yongqing Xu, Xiao‐qing He, Haotian Luo, Yujian Xu, Libo Yuan, Huan Wu, Wan-qiu Zhao

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Abstract

Objective To study the effects of nickel-titanium memory alloy nail-feet-fixator, Herbert screw and Kirschner wire on blood supply in scaphoid bone using visual digital model of scaphoid with intraosseous vessels. Methods Twelve human forearm specimens were perfused with arterial blood vessels, scanned by micro-CT and reconstructed by Mimics 20.0 software. The reconstructed data were analyzed and compared with the digital models of three internal fixation devices. Results In this study, the visualized digital model of scaphoid with blood supply was combined with three kinds of internal fixation devices to reconstruct the composite model and construct the safe zone of scaphoid nutrient artery. Among them, nickel-titanium memory alloy nail-feet-fixator has the characteristics of less vascular interference. Conclusion The digital model can be used intuitively in the study of internal fixators. All three kinds of internal fixators are located in the safe zone of scaphoid nutrient vessels. Among them, nickel-titanium memory alloy nail-feet-fixator has less interference to internal vessels than Herbert screw and Kirschner wire. Key words: Scaphoid bone; Internal fixators; Vascular perfusion; Micro CT

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三种内固定器对舟状骨血供影响的计算机辅助研究

目的利用带骨内血管的舟骨视觉数字模型，研究镍钛记忆合金钉足固定器、Herbert螺钉和克氏针对舟骨血供的影响。方法对12例前臂标本进行动脉血管灌注、显微CT扫描和Mimics 20.0软件重建。对重建的数据进行分析，并与三种内固定装置的数字模型进行比较。结果本研究将带血供的舟状骨可视化数字模型与三种内固定装置相结合，重建复合模型，构建舟状骨营养动脉的安全区。其中，镍钛记忆合金钉足固定器具有血管干扰小的特点。结论该数字模型可直观地用于内固定器的研究。三种内固定器均位于舟骨营养血管的安全区。其中，镍钛记忆合金钉足固定器对内血管的干扰小于Herbert螺钉和克氏针。关键词：肩胛骨；内部固定器；血管灌注；微型CT

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中华手外科杂志

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