<prompt> Most common shoulder dislocation isLuxatio erectaPosteriorsuperiorAnterior  <response>: The shoulder joint is the commonest joint inhuman body to dislocateThis is because shoulder joint is vulnerable to dislocation more often than any other joint in the bodyThe extreme mobility it enjoys jeopardizes its stabilityThe shoulder joint has an Achilles point at inferior pa of the capsule providing the joint with a potential weak spot, so much so 90 percent of the anterior dislocation occurs here95 of shoulder dislocations are anterior and the remaining 5 are posteriorRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 65 