The Journal of Hip Surgery 2022; 06(04): 166-172
DOI: 10.1055/s-0042-1756275
Original Article

Imageless, Computer-Assisted Navigation Improves Acetabular Component Positioning Precision in Revision Total Hip Arthroplasty

John M. Dundon
1   Department of Orthopedic Surgery, Orthopedic Institute of New Jersey, Morristown, New Jersey
,
Wayne G. Paprosky
2   Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois
,
Ran Schwarzkopf
3   Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, New York, New York
,
Brian T. Barlow
4   Department of Orthopedic Surgery, Naval Medical Center San Diego, San Diego, California
,
Jonathan M. Vigdorchik
5   Department of Orthopedic Surgery, Hospital for Special Surgery, New York, New York
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Abstract

Instability and dislocation can occur in up to one in four cases following revision total hip arthroplasty (THA), and optimal placement of components is critical in avoiding re-revision. Computer-assisted navigation can improve accuracy and precision of component placement in primary THA; however, its role in revision surgery is not defined. The purpose of our study was to evaluate the effect of computer-assisted navigation on component placement in revision THA. This study was a retrospective, multicenter cohort of 128 patients (69 imageless navigation, 59 conventional) who underwent revision THA between March 2017 and January 2019. An imageless computer navigation device was utilized in 69 of the 128 patients. Acetabular component placement and the proportion placed in a functional safe zone were compared between navigation-assisted and conventional THA groups. Mean anteversion increased significantly in both the navigation group (18.6 ± 8.5 degrees vs. 21.6 ± 7.8 degrees, p = 0.03) and the control group (19.4 ± 9.6 degrees vs. 21.2 ± 9.8 degrees, p = 0.03). Postoperatively, the proportion of acetabular components within the safe zone in the navigation group (inclination: 88%, anteversion: 84%) was mildly improved over the control group (83 and 69%, respectively). Variance in inclination improved significantly in both the control (50.6 vs. 112.4 degrees, p = 0.002) and navigation (46.2 vs. 141.1 degrees, p < 0.001) groups. Anteversion variance worsened in the control group (96.3 vs. 87.6 degrees, p = 0.36) but the navigation group showed improvement (61.2 vs. 72.7 degrees, p = 0.25). Postoperative variance was significantly better in the navigation group compared to the control group (p = 0.04). Utilizing imageless navigation in revision THAs results in more consistent placement of the acetabular component as compared to nonnavigated revision surgeries.



Publikationsverlauf

Eingereicht: 04. Oktober 2021

Angenommen: 22. Juni 2022

Artikel online veröffentlicht:
01. November 2022

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