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CT Motion-Analysis of Implant Loosening in Total Wrist Arthroplasty: A Pilot Study
Daniel Reiser1, Sanj Kakar2, Olof Sandberg3
1Department of Orthopedics and Hand Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
Introduction:
Total wrist arthroplasty (TWA) is a motion-preserving treatment option for wrist arthritis. High-precision measurement methods for implant migration such as computed tomography motion-analysis (CTMA) can potentially detect poor implant fixation. The aim of this pilot study was to assess CTMA as a complementary method to diagnose aseptic loosening of TWA.
Materials And Methods:
Three patients with a TWA and wrist pain during activity underwent induced displacement CT (CTMA) with alternated provocations as a complement to plain radiographs.
Results:
Two of the three patients had displacement of the carpal component on CTMA. The radial component was stable in all cases. The tool was adapted to clinical routine use.
Conclusions:
CT motion-analysis could be a valuable adjunct to plain radiographs in assessing component loosening in TWA.