Abstract
Introduction The costo-osteochondral autograft, vascularized medial femoral trochlear osteochondral
autograft, and proximal hamate autograft have been used for the reconstruction of
unsalvageable proximal pole scaphoid nonunions. Our hypothesis is that there is no
difference in carpal kinematics after the proximal pole of the scaphoid is reconstructed
with these three graft options.
Methods Wireless sensors were mounted to the carpus that was loaded through cyclical motion.
Each specimen was tested under a series of the three reconstructed conditions and
their kinematics compared.
Results No significant differences were found in scapholunate and lunocapitate joint motion
during wrist flexion-extension and wrist radioulnar deviation between the three reconstructed
conditions (p > 0.05).
Discussion and Conclusion There are minimal differences in carpal kinematics when comparing reconstruction
of the proximal pole of the scaphoid with the costoosteochondral, medial femoral trochlear,
and proximal hamate grafts.
Keywords
biomechanical comparison - proximal scaphoid reconstruction - proximal hamate - medial
femoral trochlea - costo-osteochondral grafts - scaphoid fracture - proximal pole
- nonunion
