title: Total shoulder replacement with a constrained prosthesis.
abstract: Forty-three shoulder-joint replacements were performed in forty-two patients using a constrained joint. Twelve material failures were experienced in the first series of twenty-two shoulders and only two in the second, modified series (twenty-one shoulders). Loosening of the glenoid components was not encountered, although radiolucent lines have been observed about some of the components. A basic feature of the design was to allow dislocation of the metal head from its cup when excessive motion of the components is attempted by the patient and a specific torque is exceeded. A method of insertion and design considerations allowed us to achieve strong attachment between the metal glenoid and the scapula.
mesh_terms: D000328:Adult; D000368:Aged; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007592:Joint Diseases / Q000601:surgery; D007595:Joint Prosthesis; D008297:Male; D008722:Methods; D008875:Middle Aged; D010146:Pain; D011183:Postoperative Complications; D011474:Prosthesis Design; D012785:Shoulder Joint / Q000502:physiology / Q000601:surgery*