Accuracy of Cup Position Following Robot-assisted Total Hip Arthroplasty May Be Associated with Surgical Approach and Pelvic Tilt

Overview

Journal Sci Rep

Specialty Science

Date 2021 Apr 8

PMID 33828113

Citations 8

Authors

Shinya Hayashi

Shingo Hashimoto

Yuichi Kuroda

Naoki Nakano

Tomoyuki Matsumoto

Kazunari Ishida

Nao Shibanuma

Tomoyuki Kamenaga

Ryosuke Kuroda

Affiliations

Soon will be listed here.

Abstract

This study aimed to investigate the accuracy of cup placement and determine the predictive risk factors for inaccurate cup positioning in robot-assisted total hip arthroplasty (THA). We retrospectively analyzed 115 patients who underwent robot-assisted THA between August 2018 and November 2019. Acetabular cup alignment and three-dimensional (3D) position were measured using pre- or postoperative computed tomography (CT) data. Absolute differences in cup inclination, anteversion, and 3D position were assessed, and their relation to preoperative factors was evaluated. The average measurement of the absolute differences was 1.8° ± 2.0° (inclination) and 1.9° ± 2.3° (anteversion). The average absolute difference in the 3D cup position was 1.1 ± 1.2 mm (coronal plane) and 0.9 ± 1.0 mm (axial plane). Multivariate analysis revealed that a posterior pelvic tilt [odds ratio (OR, 1.1; 95% confidence interval (CI), 1.00-1.23] and anterior surgical approach (OR, 5.1; 95% CI, 1.69-15.38) were predictive factors for inaccurate cup positioning with robot-assisted THA. This is the first study to demonstrate the predictive risk factors (posterior pelvic tilt and anterior surgical approach) for inaccurate cup position in robot-assisted THA.

Citing Articles

Enhancing the accuracy of cup placement in total hip arthroplasty using CT-based navigation by a trainee surgeon: a retrospective cohort study.

Tachibana T, Katagiri H, Ogawa T, Koyano G, Jinno T BMC Musculoskelet Disord. 2025; 26(1):262.

PMID: 40087730 DOI: 10.1186/s12891-025-08493-3.

Evaluation of cup placement accuracy in computer assisted total hip arthroplasty.

Kaneta H, Shoji T, Ueki S, Morita H, Kozuma Y, Adachi N Arch Orthop Trauma Surg. 2025; 145(1):191.

PMID: 40085242 DOI: 10.1007/s00402-025-05797-w.

Comparing cup placement, leg length, and offset discrepancy after total hip arthroplasty between CT-based robotic arm-assisted and navigation systems.

Shimizu A, Murakami S, Tamai T, Haga Y, Kutsuna T, Kinoshita T Bone Jt Open. 2024; 6(1):3-11.

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Precision of Cup Positioning Using a Novel Computed Tomography Based Navigation System in Total Hip Arthroplasty.

Nemati H, Christensson A, Pettersson A, Nemeth G, Flivik G Medicina (Kaunas). 2024; 60(10).

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