In pathology luxation and dislocation mean one and the same.
Pathologists give two causes for luxations, one known and the other unknown.
Diseases are said to be spontaneous which have no apparent cause, occurring without any external influence. For example, intro-uterine amputation, congenital dislocation and fracture. As fast as the causes become known they are taken out of the list of spontaneous abnormalities. Chiropractic has greatly lessened this list. Chiropractors are concerned with the incomplete luxations, articular surfaces slightly displaced and the relative position they occupy toward each other.