中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (17): 2752-2757.doi: 10.3969/j.issn.2095-4344.2015.17.023

• 数字化骨科 digital orthopedics • 上一篇    下一篇

基于3D打印的腰椎椎弓根螺钉数字化置入及临床应用

陈宣煌1,许卫红2,黄文华3,林海滨1,张国栋1,3,吴长福1,陈 旭1,余正希1   

  1. 1福建医科大学教学医院,南方医科大学附属莆田医院,莆田学院附属医院骨科,福建省莆田市 351100;2福建医科大学附属第一医院脊柱外科,福建省福州市 350005;3南方医科大学基础医学院人体解剖学教研室,广东省广州市 510515
  • 出版日期:2015-04-23 发布日期:2015-04-23
  • 通讯作者: 林海滨,教授,主任医师,博士生导师,福建医科大学教学医院,南方医科大学附属莆田医院,莆田学院附属医院骨科,福建省莆田市 351100
  • 作者简介:陈宣煌,男,1975年生,福建省仙游县人,汉族,2007年福建医科大学毕业,硕士,副主任医师,主要从事数字化骨科研究。

Digital placement and clinical application of lumbar pedicle screws based on 3D printing

Chen Xuan-huang1, Xu Wei-hong2, Huang Wen-hua3, Lin Hai-bin1, Zhang Guo-dong1, 3, Wu Chang-fu1, Chen Xu1, Yu Zheng-xi1   

  1. 1Teaching Hospital of Fujian Medical University, Putian Hospital Affiliated to Southern Medical University, Department of Orthopedics of the Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China; 2Department of Spine Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, Fujian Province, China; 3Department of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • Online:2015-04-23 Published:2015-04-23
  • Contact: Lin Hai-bin, Professor, Chief physician, Doctoral supervisor, Teaching Hospital of Fujian Medical University, Putian Hospital Affiliated to Southern Medical University, Department of Orthopedics of the Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China
  • About author:Chen Xuan-huang, Master, Associate chief physician, Teaching Hospital of Fujian Medical University, Putian Hospital Affiliated to Southern Medical University, Department of Orthopedics of the Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China

摘要:

背景:应用3D打印制备个体化导航模板辅助置钉可提高脊柱椎弓根螺钉的置钉准确率,有很好的临床应用前景。

 

目的:研究Mimics软件数字化设计结合3D打印模块进行腰椎椎弓根螺钉导航置入的方法,探讨其可行性及准确性。

 

方法:2012年2月至2013年8月,60例腰椎疾病患者采用3D打印模块辅助腰椎椎弓根螺钉导航置入内固定治疗。所有患者进行连续薄层CT扫描,采集Dicom格式图像,Mimics软件予以三维重建,设计腰椎椎弓根螺钉置钉钉道及支撑柱、分割可剥离骨面,设计带钉道的导航模块并3D打印。导航模块在手术中进行导航置钉,观察卡位、置钉情况,以X射线、CT扫描评价置钉效果。随访(12.17±3.21)个月,采用Oswestry功能障碍指数问卷表评价患者腰椎功能改善情况,JOA下腰痛评分系统评定疗效。

 

结果与结论:共制作253个导航模块,置入253枚螺钉,观察钉道及置钉后椎体周围骨质,未见爆裂。术后行X射线、CT扫描重建,发现有8枚椎弓根螺钉与术前设计相比,进钉方向稍有偏移,但均在较满意的位置,其余245枚椎弓根螺钉的进钉点,进钉方向、长度均与Mimics软件中模拟的预定理想进钉点、方向和长度一致,准确率96.84%。导航模块和相对应的椎体前方骨性结构贴合紧密,嵌合度良好,在应用时卡位及稳定性良好。末次随访时,JOA评分升高,Oswestry功能障碍指数低于术前(P < 0.01),优良率95%。提示,在导航模块的辅助下,腰椎椎弓根螺钉数字化置入精准,具有并发症少、疗效好等优点,有助于促进患者腰椎功能恢复。

 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

关键词: 植入物, 数字化骨科, 腰椎, 椎弓根螺钉, 数字化设计, 3D打印, 手术导航, 个体化导航模板, 置钉准确率, 计算机辅助设计

Abstract:

BACKGROUND: 3D printing to prepare individualized navigation template-assisted screw placement can elevate screw placement accuracy of spinal pedicle screw, and have good prospects for clinical application.

OBJECTIVE: To investigate the method of lumbar pedicle screw navigation placement using digital design of Mimics software combined with 3D printing module, and to explore its feasibility and accuracy.
METHODS: From February 2012 to August 2013, a total of 60 patients with lumbar diseases underwent 3D printing module-assisted lumbar pedicle screw navigation placement. All patients received continuous thin slice CT scan. We collected Dicom format images. Mimics software was used for 3D reconstruction to design screw channel and the supporting column of lumbar pedicle screw placement and to divide strippable bone surface, to design navigation module with screw channel, and then to carry out 3D printing. Navigation module was utilized for navigation screw placement during the surgery. The position and replacement of screw were observed. X-ray and CT scan were applied to assess the outcomes of screw placement. The patients were followed up for (12.17±3.21) months. Oswestry Disability Index was employed to evaluate the improvement of lumbar function. Japanese Orthopaedic Association (low back pain) scoring system was used to assess the therapeutic effects.
RESULTS AND CONCLUSION: 253 navigation modules were made and 253 screws were implanted. Screw channel and postoperative bone surrounding the vertebral body were observed, and no breakage was found. Postoperative X-ray and CT scan revealed that the direction of eight pedicle screws was migrated compared with preoperative design, but their positions were still satisfactory. The placement site, direction and length of 245 pedicle screws were consistent with the desired site, direction and length in Mimics software, with an accuracy of 96.84%. The navigation module was tightly connected to bone structure in front of the corresponding vertebral body, with good chimeric degree. During application, the position and stability were good. During final follow-up, Japanese Orthopaedic Association score increased, and Oswestry Disability Index was lower compared with pre-operation (P < 0.01), with an excellent and good rate of 95%. Above results confirmed that with the aid of navigation module, the digital placement of lumbar pedicle screws was precise, characterized by less complications and good therapeutic effects, and contributed to the recovery of lumbar function in patients.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

Key words: Lumbar Vertebrae, Computer-Aided Design, Internal Fixators

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