Evaluation of the Reduction and Association of the Scaphoid, Capitate, and Lunate Procedure: A Biomechanical Analysis

No failures were observed in either group when examined manually and radiographically. Static diastasis results showed reduction and association of the scaphoid, capitate, and lunate (RASCL) reduced the scaphoid and lunate more anatomically, resembling SLIL-intact wrists, while RASL over-reduced the scaphoid and lunate. RASCL had less cyclic motion diastasis than the RASL. The RASCL cyclic motion mimicked the SLIL-intact model while RASL cyclic motion was not significantly different from the SLIL injury modelConclusions:The addition of the SC screw decreased SL joint diastasis under simulated clenched-fist loading. Reduction and association of the scaphoid, capitate, and lunate is a biomechanically stronger construct allowing for more robust healing of secondary carpal stabilizers; however, it requires SC screw removal prior to weight bearing.