J Wrist Surg 2021; 10(04): 308-315
DOI: 10.1055/s-0041-1725172
Scientific Article

Total Wrist Arthroplasty Alignment and Its Potential Association with Clinical Outcomes

1   Department of Biomedical Engineering, Brown University, Providence, Rhode Island
,
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
,
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
,
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
,
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
,
3   Hand and Upper Extremity Center, Hospital for Special Surgery, New York, New York
4   Weill Medical College of Cornell University, New York, New York
,
Arnold-Peter C. Weiss
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
5   Division of Hand, Upper Extremity & Microvascular Surgery, Department of Orthopaedics, The Warren Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
,
1   Department of Biomedical Engineering, Brown University, Providence, Rhode Island
2   Department of Orthopedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island
› Institutsangaben
Funding The recruitment of participants, purchase of equipment, and access to facilities were feasible with partial support from the National Institutes of Health P30GM122732 (COBRE Bio-engineering Core) and a grant from the American Foundation for Surgery of the Hand (AFSH) + Goldner Award.

Abstract

Purpose There is a lack of quantitative research that describes the alignment and, more importantly, the effects of malalignment on total wrist arthroplasty (TWA). The main goal of this pilot study was to assess the alignment of TWA components in radiographic images and compare them with measures computed by three-dimensional analysis. Using these measures, we then determined if malalignment is associated with range of motion (ROM) or clinical outcomes (PRWHE, PROMIS, QuickDash, and grip strength).

Methods Six osteoarthritic patients with a single type of TWA were recruited. Radiographic images, computed tomography images, and clinical outcomes of the wrists were recorded. Using posteroanterior and lateral radiographs, alignment measurements were defined for the radial and carpal components. Radiographic measurements were validated with models reconstructed from computed tomography images using Bland–Altman analysis. Biplanar videoradiography (<1mm and <1 degree accuracy) was used to capture and compute ROM of the TWA components. Linear regression assessed the associations between alignment and outcomes.

Results Radiographic measures had a 95% limit-of-agreement (mean difference ±  1.96 × SD) of 3 degrees and 3mm with three-dimensional values, except for the measures of the carpal component in the lateral view. In our small cohort, wrist flexion–extension and radial–ulnar deviation were correlated with volar–dorsal tilt and volar–dorsal offset of the radial component and demonstrated a ROM increase of 3.7 and 1.6 degrees per degree increase in volar tilt, and 10.8 and 4.2 degrees per every millimeter increase in volar offset. The carpal component's higher volar tilt was also associated with improvements in patient-reported pain.

Conclusions We determined metrics describing the alignment of TWA, and found the volar tilt and volar offset of the radial component could potentially influence the replaced wrist's ROM.

Clinical Relevance TWA component alignment can be measured reliably in radiographs, and may be associated with clinical outcomes. Future studies must evaluate its role in a larger cohort.

Supplementary Material



Publikationsverlauf

Eingereicht: 22. Oktober 2020

Angenommen: 21. Januar 2021

Artikel online veröffentlicht:
14. April 2021

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