Scaphoid morphology and clinical outcomes in scaphoid reconstructions

Scaphoid malunion and carpal malalignment can result after scaphoid reconstruction, if the two fragments are not properly reduced before fixation. However, currently there is no information about which degree of deformity or malalignment can be tolerated without impairing clinical function. The purp...

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Bibliographic Details
Main Authors: Megerle, Kai Oliver (Author) , Harenberg, Patrick (Author) , Germann, Günter (Author) , Hellmich, Susanne (Author)
Format: Article (Journal)
Language:English
Published: March 2012
In: Injury
Year: 2012, Volume: 43, Issue: 3, Pages: 306-310
ISSN:1879-0267
DOI:10.1016/j.injury.2011.08.015
Online Access:Verlag, Volltext: http://dx.doi.org/10.1016/j.injury.2011.08.015
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0020138311003949
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Author Notes:K. Megerle, P.S. Harenberg, G. Germann, S. Hellmich

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520 |a Scaphoid malunion and carpal malalignment can result after scaphoid reconstruction, if the two fragments are not properly reduced before fixation. However, currently there is no information about which degree of deformity or malalignment can be tolerated without impairing clinical function. The purpose of this study was to investigate the influence of the scaphoid morphology and carpal alignment on clinical outcomes after scaphoid reconstruction. A total of 65 patients with an average age of 29 years were followed-up after a mean period of 45 months. In all patients, osseous union after a first-time scaphoid reconstruction in the middle third had been confirmed. Scapholunate (SL) and radiolunate (RL) angles were obtained on plain radiographs as were intrascaphoid (ISA) and dorsal cortical (DCA) angles and the height/length (H/L) ratio of the reconstructed scaphoid on computed tomography (CT) scans. These parameters were correlated with clinical outcome measures. RL angles correlated significantly with wrist range of motion, grip strength and pain levels, whilst SL angles, ISA, DCA and H/L ratio failed to show significant correlations. Our data suggest that clinical outcome is correlated with correct restoration of bone morphology and carpal alignment. After reconstruction, the RL angle should not exceed 10°. 
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