Smith fractures, also known as a Goyrand fracture in the French literature 3, are fractures of the distal radius with associated palmar angulation of the distal fracture fragment. Classically, these fractures are extra-articular transverse fractures and can be thought of as a reverse Colles fracture. The term is sometimes used to describe intra-articular fractures with volar displacement (a reverse Barton fracture) or juxta-articular fractures 1-3.
Smith fractures account for less than 3% of all fractures of the radius and ulna and have a bimodal distribution: young males (most common) and elderly females 1.
Smith fractures usually occur in one of two ways:
- a fall onto a flexed wrist
- direct blow to the back of the wrist
The fracture can be split into three types, although in practice a description suffices 1-2:
- extra-articular transverse fracture through the distal radius
- most common: ~85%
- intra-articular oblique fracture
- equivalent to a reverse Barton fracture
- juxta-articular oblique fracture
- uncommon: <2%
In most instances plain films suffice for diagnosis and characterisation. The fracture line is usually evident, although in undisplaced of mildly impacted fractures it can be difficult to see and subtle cortical breaches / buckling should be sought. In intra-articular fractures (type II) the degree of articular step-off and gap should be assessed, and this may require CT.
In addition to reporting the presence of a distal radial fracture with volar angulation a number of features should be sought and commented upon:
- location (extra-, juxta- or intra-articular)
- degree of angulation
- degree of displacement
- ensure no carpal malalignment or fractures are present
- assess articulation of radio-lunate and radio-scaphoid joint
Treatment and prognosis
Treatment depends on the type of fracture, stability and ability to successfully reduce the fracture. In most cases these fractures can be treated with closed reduction and cast application 1.
If the fracture can be reduced but remains unstable, or cannot be reduced then operative fixation (ORIF) is usually required 1.
Malunion, with residual volar displacement of the distal radius results in a cosmetic deformity referred to as a garden spade deformity. More importantly it also narrows and distorts the entry to the carpal tunnel and can result in carpal tunnel syndrome 1.
History and etymology
Named by Robert William Smith (1807-1873) who was a surgeon in Dublin, Ireland. He succeeded Abraham Colles (Colles fracture) as professor of surgery at Trinity college, Dublin.
Wrist and hand fractures
- wrist and hand fractures (Amsterdam wrist rules)
- distal radial fracture (Frykman classification)
- distal ulna fractures
- fracture dislocations of the radius and ulna
- carpal fractures
- metacarpal fractures
- phalanx fractures
- 1. Zhang Y. Clinical Epidemiology of Orthopedic Trauma. Thieme. ISBN:3131660414. Read it at Google Books - Find it at Amazon
- 2. Cooney WP. The Wrist, Diagnosis and Operative Treatment. (2010) ISBN:1608313905. Read it at Google Books - Find it at Amazon
- 3. Saffar P, Cooney WP. Fractures of the Distal Radius. Informa HealthCare. (1995) ISBN:1853171786. Read it at Google Books - Find it at Amazon