The 3D-Printed Customized Femoral Short Stem Offers Improved Anatomical Parameters Restoration, Fitness and Biomechanical Performance Compared With Traditional Femoral Stem.

IF 1.8 2区医学 Q2 ORTHOPEDICS

Orthopaedic Surgery Pub Date : 2025-04-01 Epub Date: 2025-02-19 DOI:10.1111/os.70000

Ziang Jiang, Rongshan Cheng, Dimitris Dimitriou, Yangyang Yang, Tsung-Yuan Tsai, Liao Wang

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引用次数: 0

Abstract

Objective: The traditional femoral stem is unsuitable for patients with severe proximal femoral bone defects or deformities. However, 3D-printed customized designs offer improved proximal femoral canal contact and enhance the initial stability of the femoral prosthesis. Therefore, this study aims to compare the anatomical parameters, contact parameters, and performance of the 3D-printed customized femoral short (CFS) stem with those of the traditional femoral stem following total hip arthroplasty (THA).

Methods: An in vitro study simulating THA was performed using artificial femur models, with a 3D-printed CFS stem as the experimental group and a Trilock stem as the control group. Anatomical parameters, fitness, filling, micro-motion, and strain distribution were evaluated using artificial femoral models. Micro-motion and strain were recorded under different simulated bodyweight loading using a 3D digital image correlation measurement system.

Results: The neck-shaft angles (NSA) and coronal femoral horizontal offset (CFHO) of the 3D-printed CFS stem (NSA: 125.22°, CFHO: 41.03 mm) were closer to those of the intact femur (NSA: 127.37°, CFHO: 43.27 mm) compare with the Trilock stem (NSA: 132.61°, CFHO: 32.98 mm). In addition, the 3D-printed CFS stem showed improved fitness at cross-sections (The top of the lesser trochanter: 6.31%, the middle of the lesser trochanter: 23.42%, the bottom of the lesser trochanter: 26.61%) and reduced micro-motion under different simulated bodyweight loads (1000: 0.043, 1375: 0.056, 2060 N: 0.061 mm).

Conclusions: The 3D-printed CFS stem provides improved restoration of anatomical parameters, enhanced fitness, and superior biomechanical performance compared with the Trilock stem.

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3d打印定制股骨短柄与传统股骨短柄相比，具有更好的解剖参数修复、适应性和生物力学性能。

目的：传统的股骨干固定术不适用于股骨近端严重骨缺损或畸形患者。然而，3d打印定制设计提供了更好的股骨近端接触，增强了股骨假体的初始稳定性。因此，本研究旨在比较全髋关节置换术（THA）后3d打印定制股骨短柄（CFS）与传统股骨短柄的解剖参数、接触参数和性能。方法：采用人工股骨模型进行体外模拟全髋关节置换术研究，以3d打印CFS干为实验组，Trilock干为对照组。使用人工股骨模型评估解剖参数、适合度、填充、微运动和应变分布。利用三维数字图像相关测量系统记录了不同模拟体重载荷下的微运动和应变。结果：3d打印CFS柄（NSA: 125.22°，CFHO: 41.03 mm）与Trilock柄（NSA: 132.61°，CFHO: 32.98 mm）相比，颈轴角（NSA: 127.37°，CFHO: 43.27 mm）与股骨颈轴角（NSA: 125.22°，CFHO: 41.03 mm）和股骨冠状位水平偏移（CFHO）更接近于完整股骨（NSA: 127.37°，CFHO: 43.27 mm）。此外，3d打印的CFS柄在不同模拟体重负荷（1000:0.043,1375:0.056,2060 N: 0.061 mm）下，在横截面上的适应度提高（小转子顶部：6.31%，小转子中部：23.42%，小转子底部：26.61%），微运动减少。结论：与Trilock椎体相比，3d打印的CFS椎体提供了更好的解剖参数恢复，增强了适应度，并具有更好的生物力学性能。

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来源期刊

Orthopaedic Surgery ORTHOPEDICS-

CiteScore

3.40

自引率

14.30%

发文量

374

审稿时长

20 weeks

期刊介绍： Orthopaedic Surgery (OS) is the official journal of the Chinese Orthopaedic Association, focusing on all aspects of orthopaedic technique and surgery. The journal publishes peer-reviewed articles in the following categories: Original Articles, Clinical Articles, Review Articles, Guidelines, Editorials, Commentaries, Surgical Techniques, Case Reports and Meeting Reports.