Accurate implant placement in THA using Three-dimensional printed custom-made acetabular component for massive defects.

5 pages•Published: March 8, 2024

Atsushi Taninaka, Tamon Kabata, Yoshitomo Kajino, Daisuke Inoue, Takaaki Ohmori, Yuki Yamamuro, Tomoyuki Kataoka, Yoshitomo Saiki, Yu Yanagi, Musashi Ima, Takahiro Iyobe and Hiroyuki Tsuchiya

Abstract

The development of 3D printing technology has had a significant impact on the medical field. This technology has made it possible to create custom-made implants that can be flexibly adapted to the bone defects of individual patients. In this study, total hip arthroplasty (THA) using the custom-made implant developed in Japan, was reviewed in patients with severe acetabular bone defects. The accuracy of each implant placement was examined.
We retrospectively studied 10 patients who underwent THA with T-REX® (Teijin Nakashima Medical) at our institution between 2020 and 2022. A 3D pelvic model of each patient was created based on preoperative computed tomography (CT) data. The 3D CAD system was used to preoperatively plan the construction of an augmentation and a flange, where necessary. A pelvic model and an implant copy made to the same shape as the custom-made implant were used as a patient-specific guide. Postoperative CT data confirmed implant placement and determined alignment errors.
The absolute errors of implant alignment were 3.92 degrees for inclination, 1.81 degrees for anteversion, and 5.48 degrees for rotation. Absolute errors of 1.87 mm in the internal/external direction, 1.55 mm in the anteroposterior direction, and 1.10 mm in the vertical direction were also observed.
In conclusion, T-REX® implants can be accurately placed during THA in cases with severe acetabular bone defects. These implants can be expected to provide firm initial fixation by taking advantage of the flexibility in their design, making them a useful treatment option for patients.

Keyphrases: 3d printer, acetabular bone defect, custom made implant, total hip arthroplasty

In: Joshua W Giles (editor). Proceedings of The 22nd Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery, vol 6, pages 110-114.

Links:	https://easychair.org/publications/paper/qRKX
	https://doi.org/10.29007/w71l

BibTeX entry

@inproceedings{CAOS2023:Accurate_implant_placement_THA,
  author    = {Atsushi Taninaka and Tamon Kabata and Yoshitomo Kajino and Daisuke Inoue and Takaaki Ohmori and Yuki Yamamuro and Tomoyuki Kataoka and Yoshitomo Saiki and Yu Yanagi and Musashi Ima and Takahiro Iyobe and Hiroyuki Tsuchiya},
  title     = {Accurate implant placement in THA using Three-dimensional printed custom-made acetabular component for massive defects.},
  booktitle = {Proceedings of The 22nd Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery},
  editor    = {Joshua W Giles},
  series    = {EPiC Series in Health Sciences},
  volume    = {6},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2398-5305},
  url       = {/publications/paper/qRKX},
  doi       = {10.29007/w71l},
  pages     = {110-114},
  year      = {2024}}

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