Purpose
To investigate the radiographic and clinical results of arthroscopic distal scaphoid
resection for isolated scaphotrapeziotrapezoid (STT) osteoarthritis and analyze the
radiographic parameters associated with the functional outcomes.
Methods
From 2008 to 2014, 17 wrists with symptomatic isolated STT osteoarthritis without
carpal deformity underwent arthroscopic distal scaphoid resection. We evaluated visual
analog scale (VAS) scores for pain, grip strength, pinch strength, and Patient-Rated
Wrist Evaluation (PRWE) scores before surgery and at the final follow-up. We analyzed
correlations between the resection height and the radiographic and functional outcomes.
Results
The average follow-up period was 42 months. The average VAS score improved from 6.1
± 2.3 before surgery to 1.7 ± 1.9 after surgery. The average grip strength improved
from 18 ± 6 to 19 ± 9 kg, pinch strength from 2.5 ± 1.1 to 4.4 ± 1.7 kg, and PRWE
score from 52 ± 23 to 32 ± 24. Carpal deformity (C-L angle of > 15°) was seen in 2
patients at the final follow-up. The deformity was more likely to occur when the resection
height was greater than 3 mm.
Conclusions
Arthroscopic distal scaphoid resection alone can reduce pain and improve functional
outcomes for early to mid-stage isolated STT osteoarthritis in patients without dorsal
intercalated segment instability deformity. Resection of greater than 3 mm of the
distal scaphoid may result in carpal malalignment.
Type of study/level of evidence
Therapeutic IV.
Key words
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Article info
Publication history
Published online: July 26, 2018
Accepted:
June 22,
2018
Received:
December 26,
2017
Footnotes
No benefits in any form have been received or will be received related directly or indirectly to the subject of this article.
Identification
Copyright
© 2019 by the American Society for Surgery of the Hand. All rights reserved.
