title: Radiographic and clinical outcomes of total shoulder arthroplasty with an all-polyethylene pegged bone ingrowth glenoid component: prospective short- to medium-term follow-up.
abstract: BACKGROUND
  Glenoid components often cause total shoulder arthroplasty failure. This study examines short-term to midterm radiographic and clinical results of a hybrid glenoid component with 3 cemented peripheral pegs and a central peg, which allows biologic fixation with use of native humeral head autograft.
  
  
  METHODS
  In 4 years, 80 glenoid components were implanted during primary total shoulder arthroplasty with at least 2-year follow-up data. Within 12 months, 4 shoulders were revised and excluded from final analyses. Seven patients did not complete their questionnaires. Outcomes data included the American Shoulder and Elbow Surgeons (ASES) questionnaire, Constant score, and satisfaction score. A shoulder and elbow fellowship-trained surgeon, not involved in the care of these patients, analyzed radiographs for radiolucent lines, glenoid seating, and radiodensity in between the flanges of the central peg.
  
  
  RESULTS
  Only 1 of 80 shoulders was revised for aseptic glenoid loosening. At final follow-up, 81.6% had a radiolucency grade of 0 or 1. Nearly 90% had a glenoid seating grade of A or B. Grade 2 or 3 bone around the central peg was seen in 88.2%. No statistical association existed between Walch glenoid types and radiolucency grades, bone grades around the central peg, perfect radiolucency grade, seating grade, and grade 3 bone around the central peg. There was significant improvement in mean ASES score, adjusted ASES pain score, Constant score, and satisfaction score as well as in forward flexion, abduction, and external rotation.
  
  
  CONCLUSIONS
  The hybrid glenoid can produce stable radiographic and clinical outcomes at short- to medium-term follow-up.
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA.
authors.forename: Di L
authors.initials: DL
authors.lastname: Parks
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA. Electronic address: dcasagrande@sanfranortho.com.
authors.forename: Danielle J
authors.initials: DJ
authors.lastname: Casagrande
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Schrumpf
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA.
authors.forename: Samuel M
authors.initials: SM
authors.lastname: Harmsen
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA.
authors.forename: Tom R
authors.initials: TR
authors.lastname: Norris
authors.affiliation: San Francisco Shoulder, Elbow, and Hand Clinic, San Francisco, CA, USA.
authors.forename: James D
authors.initials: JD
authors.lastname: Kelly
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement / Q000295:instrumentation* / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D061165:Glenoid Cavity / Q000000981:diagnostic imaging; D006801:Humans; D058430:Humeral Head / Q000000981:diagnostic imaging; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011859:Radiography; D016059:Range of Motion, Articular; D012086:Reoperation; D012189:Retrospective Studies; D012785:Shoulder Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D020069:Shoulder Pain / Q000601:surgery; D011795:Surveys and Questionnaires; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D020959:Polyethylene
keywords: Affiniti glenoid; bone grade; pegged bone ingrowth; radiolucency; seating grade; total shoulder arthroplasty