![]() Pseudoepiphyses can be confused with metacarpal fractures however, a careful physical examination can help physicians distinguish the two. On the radial side of the metacarpal base is the insertion of the abductor pollicis longus (APL) tendon. These are intra-articular fractures that result from axial loading or direct trauma collateral ligament avulsion fractures are caused by forced deviation of the flexed metacarpophalangeal joint (MCPJ). Pediatric metacarpal fractures commonly occur in patients aged 13 to 16 years, with most injuries sustained during sports activities. The strong volar oblique ligament is essential as a stabilizing unit of the base of the thumb metacarpal: it inserts into the articular margin of the volar beak on the ulnar aspect of the first metacarpal base. These are usually a result of axial loading or direct trauma (clenched fist and solid surface) torsional force may also result in this type of injury Metacarpal base fractures and dislocation of the CMC joint They are a result of direct or indirect trauma with the nature and direction of the force being directly related to the type of injury. Fractures of the 5 th metacarpal make up 25% of all metacarpal fractures (which equates to 10% of all hand fractures) ref. The lifetime incidence of a metacarpal fracture is 2.5% ref. Specific names are given to fractures of the fifth metacarpal:įracture dislocation of the base of the 5 th metacarpal: reverse Bennett fracture dislocationįracture of 5 th metacarpal neck: Boxer fracture Intra-articular fractures are subdivided into (1). Gamekeeper thumb (not always includes a fracture) Fractures of the first metacarpal can be divided into intra-articular and extra-articular fractures (Fig. ![]() It is possible to place the osteosynthesis in ulna-radial fashion from the smaller fragment achieving correct reduction and stabilization. The volar approach offers an excellent fracture exposure. Specific names are given to fractures of the base of the first metacarpal (see: fractures of the thumb): Conclusions: The complete visualization of the first metacarpal articular surface is hard to accomplish from the dorsoradial aspect of the hand. ![]()
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