. Perilunate instability. OrthopaedicsOne Articles. In: OrthopaedicsOne - The Orthopaedic Knowledge Network. Created Jan 20, 2008 07:19. Last modified Jan 20, 2008 07:19 ver.2. Retrieved 2019-07-19, from https://www.orthopaedicsone.com/x/XYBF.
Perilunate dislocations are classified according to the Mayfield system. Stage 1= disruption of the scapholunate and radioscaphocapitate ligaments, Stage 2 = capitate and scaphoid separate from lunate, Stage 3 = force transmits ulnarly disrupting the lunotriquetral ligament resulting in complete separation of lunate from carpus, Stage 4 = lunate dislocation.