Displacement of an organ or any part; specifically a disturbance or disarrangement of the normal relation of the bones at a joint. The direction of the d. is determined by the position of the distal part of the articulation. SYN: dislocatio, luxation (1). [L. dislocatio, fr. dis-, apart, + locatio, a placing]
- d. of articular processes complete d. of one or both articular processes, usually with overriding of the inferior articular process of the vertebra above into a position anterior to the superior articular process of the vertebra below. SYN: locked facets.
- arytenoid d. separation of the cricoarytenoid joint with subluxation of the arytenoid cartilage. SYN: arytenoid subluxation.
- fracture d. d. associated with or accompanied by a fracture of one of the bones forming the articulation.
- open d. a d. complicated by a wound opening from the surface down to the affected joint. SYN: compound d..
- perilunar d. d. of carpal bones around the lunate, which remains in its normal anatomic position in relation to the radius; distinguish from d. of lunate, Kienböck d..
- simple d. SYN: closed d..
* * *
* * *
n.
displacement from their normal position of bones meeting at a joint such that there is complete loss of contact of the joint surfaces. It usually results from trauma (dislocation of the shoulder is common in sports injuries) but may be congenital, in which case it usually affects the hip (see congenital dislocation of the hip). In a traumatic dislocation the bones are restored to their normal positions by manipulation under local or general anaesthesia (see reduction). Compare subluxation.
* * *
dis·lo·ca·tion (dis″lo-kaґshən) [dis-1 + L. locare to place] the displacement of any part, more especially of a bone; see Plate 13. Called also luxation.
PLATE 13 VARIOUS TYPES OF DISLOCATION
Medical dictionary. 2011.