title: Assessment of reactive synovitis in rotating-platform posterior-stabilized design: a 10-year prospective matched-pair MRI study.
abstract: This is the first long-term (mean 11.6 years), prospective, matched-pair study (based on age, gender, BMI and UCLA scores) using MAVRIC (multi-acquisition variable-resonance image combination) magnetic resonance imaging to analyze reactive synovitis and osteolysis between rotating-platform posterior-stabilized (RP-PS), fixed-bearing metal-back (FB-MB), and all-polyethylene tibial (APT) in active patients (24 total, 8 in each group, mean age of 64 years, mean UCLA of 8.5) with identical femoral component and polyethylene. Reactive synovitis was observed in 6 RP-PS (75%), all 8 FB-MB (100%), and 6 APT (75%). There was a significant difference between the RP-PS and FB-MB knees in volumetric synovitis (P=0.023). Osteolysis with bone loss more than 4mm was seen in 3 FB-MB, 2 APT and none for RP-PS. These were not statistically significant.
authors.affiliation: Hospital for Special Surgery, New York, New York.
authors.forename: Morteza
authors.initials: M
authors.lastname: Meftah
authors.forename: Hollis G
authors.initials: HG
authors.lastname: Potter
authors.forename: Stephanie
authors.initials: S
authors.lastname: Gold
authors.forename: Anil S
authors.initials: AS
authors.lastname: Ranawat
authors.forename: Amar S
authors.initials: AS
authors.lastname: Ranawat
authors.forename: Chitranjan S
authors.initials: CS
authors.lastname: Ranawat
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000295:instrumentation; D001672:Biocompatible Materials; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis / Q000009:adverse effects*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010014:Osteolysis / Q000175:diagnosis / Q000209:etiology; D020959:Polyethylene; D011446:Prospective Studies; D011474:Prosthesis Design / Q000009:adverse effects*; D011475:Prosthesis Failure; D013585:Synovitis / Q000175:diagnosis* / Q000209:etiology
chemical_list: D001672:Biocompatible Materials; D020959:Polyethylene
keywords: MAVRIC MRI; osteolysis; reactive synovitis; rotating-platform posterior-stabilized design; total knee arthroplasty