title: Instability after prosthetic arthroplasty of the shoulder.
abstract: Instability of the shoulder is a common complication after prosthetic arthroplasty and accounts for approximately 4% to 5% of case series with mixed preoperative diagnoses. Several anatomic abnormalities and risk factors are associated with this problem. The direction of instability often is associated with the more common types of structural abnormalities.
authors.affiliation: Shoulder and Elbow Service, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Hennigan
authors.forename: J P
authors.initials: JP
authors.lastname: Iannotti
mesh_terms: D019643:Arthroplasty, Replacement; D001696:Biomechanical Phenomena; D006801:Humans; D007593:Joint Instability / Q000145:classification / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery; D011183:Postoperative Complications / Q000209:etiology* / Q000601:surgery; D017006:Rotator Cuff / Q000503:physiopathology; D012785:Shoulder Joint / Q000601:surgery*; D013997:Time Factors