Jia Ganggang, Zhou Mingwang, Ji Xing, Zhang Zhiming, Zhao Yongqiang, Xi Zhiling
Gansu Provincial Hospital of Traditional Chinese Medicine, Lanzhou, 730000, China.
Gansu Provincial Institute of Traditional Chinese Medicine, Lanzhou, 730000, China.
J Orthop Surg Res. 2025 May 24;20(1):509. doi: 10.1186/s13018-025-05885-y.
Distal radius fractures (DRFs) are among the most commonly encountered types of fractures in clinical practice. Conventional treatment methods include surgical intervention and traditional small splint fixation following manual reduction based on Traditional Chinese Medicine (TCM). However, these conventional small splints do not adequately meet the current demands for personalized and precision medicine. To address this issue, this study proposes a novel personalized distal radius fixation splint utilizing 3D printing technology. Firstly, a customized splint model that conforms to the patient's fracture surface is established through three-dimensional scanning of the fracture site. Subsequently, the Tyson polygon structure and Grasshopper software are employed to parameterize the hollowing-out process of the splint, resulting in a personalized splint with a three-dimensional hollow-out structure. During the static analysis of the 3D hollow splint model, forces of 100 N and 150 N were applied. Under a force of 100 N, the maximum deformation of the splint was measured at 0.52 mm with a maximum strain value of 0.02 mm/mm and a maximum equivalent stress level of 19.415 MPa. However, when subjected to a force of 150 N, the maximum deformation increased to 0.78 mm with a corresponding increase in maximum strain value to 0.03 mm/mm and an elevated maximum equivalent stress level measuring 29.122 MPa. Additionally, this study also examined the flexural strength and weight of the 3D-printed splint in comparison to the conventional small splint. The test results demonstrate that, under pressure of 150 N, the radial offset of the 3D printed splint is reduced by 1.7 mm compared to that of the traditional small splint, with a corresponding decrease in stress by 0.01 MPa as well. In terms of weight, a set of 3D printed splints weighs 89 g while a set of conventional splints weighs 102 g, resulting in a significant reduction of 13 g for the 3D printed splints compared to their traditional counterparts. These findings indicate clear advantages associated with utilizing 3D-printed splints in terms of minimizing offset and reducing overall weight.
桡骨远端骨折（DRFs）是临床实践中最常见的骨折类型之一。传统的治疗方法包括手术干预以及基于中医（TCM）手法复位后采用传统小夹板固定。然而，这些传统小夹板无法充分满足当前对个性化和精准医疗的需求。为解决这一问题，本研究提出一种利用3D打印技术的新型个性化桡骨远端固定夹板。首先，通过对骨折部位进行三维扫描，建立符合患者骨折面的定制夹板模型。随后，采用泰森多边形结构和Grasshopper软件对夹板的镂空过程进行参数化，从而得到具有三维镂空结构的个性化夹板。在对3D中空夹板模型进行静态分析时，施加了100 N和150 N的力。在100 N的力作用下，夹板的最大变形量为0.52 mm，最大应变值为0.02 mm/mm，最大等效应力水平为19.415 MPa。然而，当受到150 N的力时，最大变形量增加到0.78 mm，最大应变值相应增加到0.03 mm/mm，最大等效应力水平升高至29.122 MPa。此外，本研究还将3D打印夹板的抗弯强度和重量与传统小夹板进行了比较。测试结果表明，在150 N的压力下，3D打印夹板的桡侧偏移量比传统小夹板减少了1.7 mm，应力也相应降低了0.01 MPa。在重量方面，一组3D打印夹板重89 g，而一组传统夹板重102 g，3D打印夹板比传统夹板显著减轻了13 g。这些发现表明，使用3D打印夹板在减少偏移和减轻整体重量方面具有明显优势。
