title: Current concepts of shoulder arthroplasty for radiologists: Part 1--Epidemiology, history, preoperative imaging, and hemiarthroplasty.
abstract: OBJECTIVE
  The purpose of this article is to provide a review of indications for shoulder arthroplasty, describe preoperative imaging assessment, present new and modified designs of shoulder arthroplasty, illustrate normal and abnormal postoperative imaging findings, and review key radiographic measurements.
  
  
  CONCLUSIONS
  Knowledge of the physiologic purpose, orthopedic trends, imaging findings, and complications is important in assessing shoulder prostheses.
authors.affiliation: Department of Radiology, Penn State Hershey Medical Center, 500 University Dr, Hershey, PA 17033, USA. jpetscavage@hmc.psu.edu
authors.forename: Jonelle M
authors.initials: JM
authors.lastname: Petscavage
authors.forename: Alice S
authors.initials: AS
authors.lastname: Ha
authors.forename: Felix S
authors.initials: FS
authors.lastname: Chew
mesh_terms: D019643:Arthroplasty, Replacement / Q000009:adverse effects; D062785:Hemiarthroplasty; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007595:Joint Prosthesis; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000601:surgery; D011474:Prosthesis Design; D011859:Radiography; D000070636:Rotator Cuff Injuries; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*