The Kapandji technique for fixation of distal radius fractures--a biomechanical comparison of primary stability.
The goal of this study was to compare Kapandji-K-wiring and established K-wiring techniques of the distal radius fracture for primary stability in a biomechanical model: dorsal K-wiring according to Kapandji using different angles of the K-wire, parallel and diagonal alignment of the K-wires. A new testing system which uses a synthetic material enabled us to carry out the cantilever bending test. By application of a lower load, the Kapandji procedure shows a higher reactive torque and stiffness. A higher reaction force of the other techniques, especially of the parallel wiring, are only observable under high-grade bending stress. Application of the Kapandji procedure with K-wires at a smaller angle to the axis of the radius results in the highest primary stability of the procedures investigated in the essential range of initial deformation.
Mittelmeier
W
W
Klinik für Orthopädie und Sportorthopädie, Technische Universität München, Ismaninger Str. 22, 80809 München, Germany. wmpriv@aol.com
Braun
C
C
Schäfer
R
R
D001696:Biomechanical Phenomena; D001864:Bone Wires; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007593:Joint Instability / Q000517:prevention & control*; D008953:Models, Anatomic; D011885:Radius Fractures / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014954:Wrist Injuries / Q000503:physiopathology / Q000601:surgery