Abstract

Objective The aim of this study was to report the accuracy of pedicle screw placement using three-dimensional (3D)-printed, patient-specific drill guides in the lumbosacral region of dogs.

Study Design This was a retrospective study. Thirty-two pedicle screws were placed in five dogs. Medical records were reviewed between November 2015 and November 2018 for dogs showing clinical signs associated with cauda equina syndrome. Inclusion criteria included preoperative magnetic resonance imaging, pre- and postoperative computed tomography (CT) and dorsal stabilization, with pedicle screws placed using 3D-printed, patient-specific drill guides and polymethylmethacrylate. Screw placement was evaluated for medial or lateral breaching on postoperative CT.

Results Five dogs met the inclusion criteria. Four had degenerative lumbosacral stenosis and one had discospondylitis. All dogs had failed medical management prior to surgery. Of 32 bicortical pedicle screws placed, 30 were fully contained inside the pedicle and 2 were partially breaching the vertebral canal (less than one-third of the screw diameter). Postoperative CT revealed good alignment of L7-S1 in all planes.

Conclusions This technique enabled an accurate and safe placement of pedicle screws in the lumbosacral region of dogs with lumbosacral disease. Three-dimensional, printed patient-specific drill guides are a safe and effective method of placing pedicle screws in dogs with lumbosacral disease.

Authors' Contributions

Cristina Toni contributed to conception of study, study design, acquisition of data and data analysis and interpretation. Stephen Clarke, Bill Oxley, and Sebastien Behr contributed to conception of study, study design, and data analysis and interpretation. All authors drafted, revised and approved the submitted manuscript.

Publication History

Received: 06 January 2020

Accepted: 30 July 2020

Publication Date:
16 October 2020 (online)

© 2020. Thieme. All rights reserved.

Georg Thieme Verlag KG
Stuttgart · New York

中文翻译：

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使用 3D 打印的患者专用导钻器在狗的腰骶部放置椎弓根螺钉的准确性

摘要

目的 本研究的目的是报告使用三维 (3D) 打印的、患者特定的钻导器在狗的腰骶部放置椎弓根螺钉的准确性。

研究设计 这是一项回顾性研究。三十二颗椎弓根螺钉被放置在五只狗身上。2015 年 11 月至 2018 年 11 月期间，我们审查了显示与马尾综合征相关临床症状的狗的医疗记录。纳入标准包括术前磁共振成像、术前和术后计算机断层扫描 (CT) 和背部稳定，使用 3D 打印、患者特定的钻导器和聚甲基丙烯酸甲酯放置椎弓根螺钉。在术后 CT 上评估螺钉置入的内侧或外侧破坏。

结果 五只狗符合纳入标准。4 人患有退行性腰骶部狭窄，1 人患有椎间盘炎。所有的狗在手术前都没有进行医疗管理。在放置的 32 个双皮质椎弓根螺钉中，30 个完全包含在椎弓根内，2 个部分突破椎管（小于螺钉直径的三分之一）。术后 CT 显示 L7-S1 在所有平面中均良好对齐。

结论 该技术能够在患有腰骶部疾病的犬的腰骶部准确且安全地放置椎弓根螺钉。3D 打印的患者专用钻导器是一种安全有效的方法，可以在患有腰骶部疾病的狗身上放置椎弓根螺钉。

作者的贡献

克里斯蒂娜·托尼 (Cristina Toni) 为研究概念、研究设计、数据获取以及数据分析和解释做出了贡献。Stephen Clarke、Bill Oxley 和 Sebastien Behr 对研究概念、研究设计以及数据分析和解释做出了贡献。所有作者起草、修改并批准了提交的手稿。

出版历史

收稿日期：2020 年 1 月 6 日

接受日期：2020 年7 月 30 日

出版日期：
2020 年 10 月 16 日（在线）

© 2020. 蒂姆。版权所有。

Georg Thieme Verlag KG
斯图加特·纽约