Accuracy and precision of cementless and cemented stem placement using CT-based navigation.

Toshihito Hiraiwa; Kunihiko Tokunaga

doi:10.29007/64ts

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Accuracy and precision of cementless and cemented stem placement using CT-based navigation.

3 pages•Published: March 8, 2024

Toshihito Hiraiwa and Kunihiko Tokunaga

Abstract

Few surgeons use computer assisted surgery for stem placement in THA because its accuracy is not
sufficient rather than that for acetabular cup placement. Recently, cemented stem can be available in CT- based navigation, however, accuracy and precision of cemented stem alignment has not been reported. We compared accuracy and precision between cementless and cemented stems using the same CT-based navigation (Stryker hip navigation). We analyzed 43 cases (10 men, 33 women; average age 69.3 years) using cementless and cemented stem (Accolade II stem and Exeter stem [Stryker]) after CT-based navigation assisted THA. The differences (average ± standard deviation of absolute values) between the pre- and post-operative angles of stem anteversion were 3.8 ± 3.0° in the cementless group, and 2.4±1.8° in cemented group, respectively. There was a significant difference in precision in stem anteversion between the two groups. The accuracy and the precision of stem anteversion using the taper-wedge stem in this study was comparable to the previous reports using CT-based navigation. However, the precision of stem alignment with cemented stems was more accurate. When we used cemented stem, stem alignment consisted of 4 factors (stem flexion, varus, anteversion, and depth) could be completely controlled by checking the numbers on the navigation screens until bone cement hardened. Therefore, precision of cemented stem alignment using CT-based navigation are more accurate than that of cementless stems.

Keyphrases: Cemented stem, CT-based navigation, 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 59--61

Links:	https://easychair.org/publications/paper/TXBd
	https://doi.org/10.29007/64ts

BibTeX entry

@inproceedings{CAOS2023:Accuracy_and_precision_of,
  author    = {Toshihito Hiraiwa and Kunihiko Tokunaga},
  title     = {Accuracy and precision of cementless and cemented stem placement using CT-based navigation.},
  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},
  pages     = {59--61},
  year      = {2024},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2398-5305},
  url       = {https://easychair.org/publications/paper/TXBd},
  doi       = {10.29007/64ts}}

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