title: MRI of Polyethylene Tibial Inserts in Total Knee Arthroplasty: Normal and Abnormal Appearances.
abstract: OBJECTIVE
  The purpose of this study was to describe the normal and abnormal MRI appearances of polyethylene tibial inserts. Subjects who underwent MRI before revision total knee arthroplasty were identified. The polyethylene tibial insert's shape was categorized on MRI, and the presence of abnormalities was noted.
  
  
  CONCLUSIONS
  The shape of the polyethylene tibial insert varied with the design. Polyethylene tibial insert abnormalities seen on MRI included displacement and fracture. MRI distinguishes various designs of polyethylene tibial inserts and can show associated abnormalities.
authors.affiliation: 1 Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021.|2 Weill Cornell Medical College, New York, NY.
authors.forename: Angela E
authors.initials: AE
authors.lastname: Li
authors.affiliation: 1 Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021.|2 Weill Cornell Medical College, New York, NY.
authors.forename: Darryl B
authors.initials: DB
authors.lastname: Sneag
authors.affiliation: 1 Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021.|2 Weill Cornell Medical College, New York, NY.
authors.forename: Theodore T
authors.initials: TT
authors.lastname: Miller
authors.affiliation: 3 Department of Biomechanics, Hospital for Special Surgery, New York, NY.
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Lipman
authors.affiliation: 2 Weill Cornell Medical College, New York, NY.|4 Adult Reconstruction and Joint Replacement Division, Hospital for Special Surgery, New York, NY.
authors.forename: Douglas E
authors.initials: DE
authors.lastname: Padgett
authors.affiliation: 1 Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021.|2 Weill Cornell Medical College, New York, NY.
authors.forename: Hollis G
authors.initials: HG
authors.lastname: Potter
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011183:Postoperative Complications / Q000000981:diagnostic imaging* / Q000209:etiology; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies
chemical_list: D020959:Polyethylene
keywords: MRI; fracture; implant; polyethylene tibial insert; polyethylene wear; total knee arthroplasty