Quantification of contralateral differences of the scaphoid: a comparison of bone geometry in three dimensions.
The purpose of this study was to accurately quantify contralateral differences of the scaphoid in three-dimensional space to evaluate the feasibility of using the healthy contralateral bone as a reconstruction template in the preoperative planning of complex mal- or nonunions. Three-dimensional surface models of the left and right scaphoids were reconstructed from computed tomography images and compared in 26 individuals. Left-right differences were quantified with respect to volume, surface area, length, and surface-to-surface deviation. The average left-right differences in volume, surface area, and length were 95.4 mm(3) (SD 66.2 mm(3)), 32.7 mm(2) (SD 22.9 mm(32)), and 0.28 mm (SD 0.4 mm), respectively. The average surface-to-surface deviation between the sides was 0.26 mm (SD 0.2 mm). High statistical correlation (Pearson) between the left and the right side was found in all evaluated measures.
Department of Surgery, Spital Flawil, Kantonsspital St. Gallen, Krankenhausstrasse 23, 9230 Flawil, Switzerland.
Claudio
C
Letta
Department of Orthopaedic Surgery, University Hospital Balgrist, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland.
Andreas
A
Schweizer
Computer Assisted Research & Development Group, University Hospital Balgrist, University of Zurich, Forchstrasse 340, 8008 Zurich, Switzerland.
Philipp
P
Fürnstahl