metacarpal fracture
Typische
Boxerfraktur in diesem Fall nicht durch Boxen, sondern durch einen Sturz auf die Hand.
Enchondrom
des 3. Mittelhandknochens mit pathologischer Fraktur. Durch die erhebliche Ausdünnung der Kortikalis ist der Knochen an der Stelle erheblich weniger belastbar und es kam in diesem Fall schon beim ruckartigen Anheben eines Gegenstandes zur Fraktur.
Fracture of
the 4th Metacarpal Bone. This is an edited version of the source image made for use in the "Anatomist" iOS and Android app and shared here under the terms of the source image"s Share Alike Creative Commons license.
Wintersteinfraktur
vor und nach Osteosynthese (in Gips). Die Frakturlinie zieht nicht in das Karpometakarpalgelenk.
Sports-related
wrist and hand injuries: a review. a Intraoperative and b fluoroscopic images of a long oblique metacarpal shaft fracture secured with three lag screws. c Intraoperative and d fluoroscopic images of a transverse shaft fracture secured with a plate and screws
Sports-related
wrist and hand injuries: a review. Plate and screw fixation of an angulated fifth metacarpal neck fracture in a high school running back
Metacarpal fractures are common. Fractures of the metacarpal bones account for 10% of all fractures and 40% of all hand fractures. The lifetime incidence of a metacarpal fracture is 2.5%.
Terminology
Specific names are given to fractures of the base of the first metacarpal (see: fractures of the thumb):
- Bennett fracture dislocation
- Rolando fracture
- epibasal thumb fracture
- gamekeeper thumb (not always includes a fracture)
Specific names are given to fractures of the fifth metacarpal:
- fracture dislocation of the base of the 5 metacarpal: reverse Bennett fracture dislocation
- fracture of 5 metacarpal neck: Boxer fracture
Epidemiology
Fractures of the 5metacarpal make up 25% of all metacarpal fractures (which equates to 10% of all hand fractures).
Pathology
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. Specific injury patterns include:
- carpometacarpal (CMC) joint injury
- metacarpal base fractures and dislocation of the CMC joint
- metacarpal shaft and neck fractures
- 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 head injury
- 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).
- metacarpophalangeal joint dislocations
- dorsal MCPJ dislocations are the most frequent and a result of forced hyperextension of the digit
Siehe auch:
- Winterstein-Fraktur
- subkapitale Fraktur Os metacarpale 5
- Rolando-Fraktur
- Bennett-Fraktur
- Skidaumen
- Frakturen Metakarpale 1
- Daumenfrakturen
und weiter:
Assoziationen und Differentialdiagnosen zu Frakturen der Metakarpalia: 
