The stiffness of the four fixation types was determined by observing force–displacement curves. The specimens were tested by using cantilever bending testing on a material testing system. We used a saw blade to create transverse metacarpal neck fractures in 16 artificial metacarpal bone specimens, which were then treated with four types of fixation as follows: (1) locking plate with five locking bicortical screws (LP group), (2) regular plate with five bicortical screws (RP group), (3) two K -wires (K group), and (4) two K -wires and a figure-of-eight cerclage wire (KW group). The fixation power of this new method was compared with that of K-wires alone and plates. The present study proposed fixation using K-wires and a cerclage wire to treat fifth metacarpal neck fracture. A fixation method that causes little soft tissue damage and provides high biomechanical stability is required for patients with fifth metacarpal neck fracture for whom surgical intervention is indicated. Plate fixation is also a surgical option, but it has the disadvantages of tendon adhesion, requirement of secondary surgery for removal of the implant, and postoperative joint stiffness. However, the fixation power of K-wires is a major concern. Percutaneous Kirschner-wire (K-wire) pinning has been shown to produce favorable clinical results. Fifth metacarpal neck fracture, also known as boxer’s fracture, is the most common metacarpal fracture.
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