Xu Wei, Zhang Xuming, Ke Tie, Cai Hongru, Gao Xiang
Department of Emergency & Trauma Surgery, Fujian Provincial Hospital, Fuzhou, Fujian Province, 350001, China.
Department of Trauma, Institute of Emergency Medicine, Fujian Provincial Hospital, Fuzhou, Fujian Province, 350001, China.
BMC Musculoskelet Disord. 2017 Aug 11;18(1):348. doi: 10.1186/s12891-017-1703-1.
This study aimed to evaluate the application of 3D printing in assisting preoperative plan of pedicle screw placement for treating middle-upper thoracic trauma.
A preoperative plan was implemented in seven patients suffering from middle-upper thoracic (T3-T7) trauma between March 2013 and February 2016. In the 3D printing models, entry points of 56 pedicle screws (Magerl method) and 4 important parameters of the pedicle screws were measured, including optimal diameter (ϕ, mm), length (L, mm), inclined angle (α), head-tilting angle (+β), and tail-tilting angle (-β). In the surgery, bare-hands fixation of pedicle screws was performed using 3D printing models and the measured parameters as guidance.
A total of seven patients were enrolled, including five men and two women, with the age of 21-62 years (mean age of 37.7 years). The position of the pedicle screw was evaluated postoperatively using a computerized tomography scan. Totally, 56 pedicle screws were placed, including 33 pieces of level 0, 18 pieces of level 1, 4 pieces of level 2 (pierced lateral wall), and 1 piece of level 3 (pierced lateral wall, no adverse consequences), with a fine rate of 91.0%.
3D printing technique is an intuitive and effective assistive technology to pedicle screw fixation for treating middle-upper thoracic vertebrae, which improve the accuracy of bare-hands screw placement and reduce empirical errors.
The trial was approved by the Ethics Committee of the Fujian Provincial Hospital. It was registered on March 1st, 2013, and the registration number was K2013-03-001.
本研究旨在评估3D打印技术在辅助中上段胸椎创伤椎弓根螺钉置入术前规划中的应用。
对2013年3月至2016年2月期间7例中上段胸椎（T3-T7）创伤患者实施术前规划。在3D打印模型上，测量56枚椎弓根螺钉（Magerl法）的进针点及椎弓根螺钉的4个重要参数，包括最佳直径（ϕ，mm）、长度（L，mm）、倾斜角度（α）、头部倾斜角度（+β）和尾部倾斜角度（-β）。手术中，以3D打印模型及测量参数为指导徒手置入椎弓根螺钉。
共纳入7例患者，其中男性5例，女性2例，年龄21-�2岁（平均年龄37.7岁）。术后采用计算机断层扫描评估椎弓根螺钉位置。共置入56枚椎弓根螺钉，其中0级33枚，1级18枚，2级4枚（穿透侧壁），3级1枚（穿透侧壁，无不良后果），优良率为91.0%。
对于中上段胸椎椎弓根螺钉固定，3D打印技术是一种直观有效的辅助技术，可提高徒手置钉的准确性，减少经验性误差。
本试验经福建省立医院伦理委员会批准。于2013年3月1日注册，注册号为K2013-0ͨ-001。
