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Common Finger Fractures and Dislocations.

Authors:
Marc A Childress Jairo Olivas Anna Crutchfield

Am Fam Physician 2022 06;105(6):631-639

Fairfax Family Medicine Residency Program and University of Virginia, Fairfax, VA, USA.

Finger fractures and dislocations are commonly seen in the primary care setting. Patients typically present with a deformity, swelling, and bruising with loss of function. Anteroposterior, lateral, and oblique radiography should be performed to identify fractures and distinguish uncomplicated injuries from those requiring referral. Uncomplicated distal phalanx fractures, caused by a crush injury to the end of the finger, require splinting of the distal interphalangeal joint for four to six weeks. Uncomplicated dorsal avulsion fractures (mallet finger) of the distal interphalangeal joint, caused by forced flexion against resistance, require strict splint immobilization for eight weeks. Flexor digitorum profundus fractures are caused by forceful extension of the distal interphalangeal joint when in a flexed position, resulting in an avulsion fracture at the volar base of the distal phalanx, and usually require surgery. Uncomplicated middle and proximal phalanx fractures, typically caused by a direct blow, can be treated with buddy splinting if there is minimal angulation (less than 10 degrees); however, larger angulations, displacement, and malrotation often require reduction or surgery. Dorsal proximal interphalangeal joint dislocations require reduction and buddy splinting in slight flexion with an extension-block splint. Volar proximal interphalangeal joint dislocations require reduction and splinting in full extension for four to six weeks. Distal interphalangeal joint dislocations require reduction and splinting in full extension (for volar dislocations) or 15 to 30 degrees of flexion (for dorsal dislocations) for two to three weeks. Dorsal metacarpophalangeal joint dislocations are managed with reduction and splitting, but referral to an orthopedic specialist is required if the dislocation is not easily reduced. Volar metacarpophalangeal dislocations are rare and warrant referral.

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June 2022

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