title: Anterior knee symptoms after S-ROM hinge implantation.
abstract: OBJECTIVE
  To evaluate the performance of a canal filling hinge device for complex knee arthroplasty.
  
  
  METHODS
  Thirty-seven (4 primary hinge implantation and 33 revision cases) patients who had undergone arthroplasty with the S-ROM third generation hinge device for a combination of massive bone loss or ligamentous insufficiency were prospectively examined with a minimum of 5-year follow-up. Median age at surgery was 72 years (range: 43 to 87 years). Principal indications included aseptic loosening or massive osteolysis (24 cases), infection (8 cases) and periprosthetic fracture (4 cases). All patients exhibited either grade 2 (N = 12) or grade 3 (N = 25) AORI bone loss or a grade 3 medial ligament deficiency.
  
  
  RESULTS
  One patient experienced implant failure (71 months), and one patient suffered late deep infection (36 months). Mean WOMAC score improved from 27 to 62. Four patients required patellar resurfacing for persistent pain. The 5-year survivorship was 86%.
  
  
  CONCLUSIONS
  While the S-ROM device may offer satisfactory medium term outcome for complex end stage knee disease, we report a high rate of debilitating anterior knee symptoms.
authors.forename: David J
authors.initials: DJ
authors.lastname: Deehan
authors.forename: Rajkumar
authors.initials: R
authors.lastname: Gangadharan
authors.forename: Ajay
authors.initials: A
authors.lastname: Malviya
authors.forename: Alasdair
authors.initials: A
authors.lastname: Sutherland
authors.forename: James P
authors.initials: JP
authors.lastname: Holland
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000503:physiopathology / Q000601:surgery; D011446:Prospective Studies; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012086:Reoperation; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome