Welcome to Classifications and Online Calculators in Radiology
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Intraarticular fracture of distal radius - types by Melone
The Melone classification was first published in 1986. It divides distal radius fractures in four types. This classification is based on a concept of four major fragments including the shaft, the radial styloid process, a dorsal-medial fragment, and a palmar-medial fragment. The latter two fragments form the lunate fossa.
| Type | Description |
|---|---|
| I - undisplaced fractures | Undisplaced or minimally displaced fracture with minimal comminution. |
| II - die-punch fractures | "Die-punch" fracture with moderate to severe dorsal or palmar displacement of the medial complex. |
| III - spike fractures | Presence of a spike fragment from the shaft that projects into flexor compartment and can injure the flexor tendons and the median nerve. Medial complex is displaced as a unit. Displaced radial shaft fragments. |
| IV - split fractures | Wide separation or rotation of the intraarticular fragments, extensive soft tissue and periarticular damage. |
References:
1. Melone CP Jr. Open treatment for displaced articular fractures of the distal radius. Clin. Orthop. Relat. Res. 1986 Jan;(202):103–11.
2. Andersen DJ, Blair WF, Steyers CM Jr, Adams BD, el-Khouri GY, Brandser EA. Classification of distal radius fractures: an analysis of interobserver reliability and intraobserver reproducibility. J Hand Surg Am. 1996 Jul;21(4):574–82.
Updated 12/8/2013 18:32 by Lambert
