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. 2024 Aug;34(6):2963-2972.
doi: 10.1007/s00590-024-04020-7. Epub 2024 Jun 5.

Novel positioning guiders accurately assist in situ acetabular reconstruction for patients undergoing pelvic bone tumor resection

Donghua Huang #  1   2   3   4 , Zehao Chen #  1   2   3   4 , Xiaobo Yan  1   2   3   4 , Xin Huang  1   2   3   4 , Meng Liu  1   2   3   4 , Zhaonong Yao  1   2   3   4 , Hengyuan Li  1   2   3   4 , Hao Qu  1   2   3   4 , Xiao Ma  1   2   3   4 , Zhaoming Ye  1   2   3   4 , Nong Lin  5   6   7   8
Affiliations

Novel positioning guiders accurately assist in situ acetabular reconstruction for patients undergoing pelvic bone tumor resection

Donghua Huang et al. Eur J Orthop Surg Traumatol. 2024 Aug.

Abstract

Purpose: Acetabular reconstruction in situ after extensive pelvic resection is technically challenging. The aim of this study was to investigate the feasibility of positioning guiders for acetabular reconstruction following pelvic tumor resection and the clinical benefit brought by the approach.

Methods: The study included patients who underwent acetabular reconstruction following periacetabular tumor resection using a modular hemipelvic prosthesis. In the guider-assisted group (n = 14), guiders were designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 18), the patients underwent the same surgery but without the guiders. The displacement of the hip rotation center before and after surgery was calculated. The complications and the Musculoskeletal Tumor Society-93 scores were documented.

Results: The overall displacement of the hip rotation center was significantly reduced in the guider-assisted group compared with the traditional operation group (13.83 ± 4.06 vs. 22.95 ± 9.18 mm in P = 0.000, 95%CI 3.90-12.96), especially in the anteroposterior axis (3.77 ± 3.03 versus 13.51 ± 9.43 mm in P = 0.000, 95%CI 3.45-13.09). Guider-assisted acetabular reconstruction reduced the risk of prosthesis dislocation compared with the traditional operation (dislocation risks: 1/14, 7.1% vs. 4/18, 22.2%).

Conclusion: Positioning guiders can effectively and conveniently help place the modular hemipelvic prosthesis at the native position, which might potentially reduce the risk of prosthesis dislocation.

Level of evidence: Therapeutic level III.

Keywords: Acetabular reconstruction; Hip rotation center; Pelvic tumor; Placement in situ; Positioning guiders.

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