title: Mechanically assisted taper corrosion in modular TKA.
abstract: The purpose of this study was to characterize the prevalence of taper damage in modular TKA components. One hundred ninety-eight modular components were revised after 3.9±4.2 years of implantation. Modular components were evaluated for fretting corrosion using a semi-quantitative 4-point scoring system. Design features and patient information were assessed as predictors of fretting corrosion damage. Mild-to-severe fretting corrosion (score ≥2) was observed in 94/101 tapers on the modular femoral components and 90/97 tapers on the modular tibial components. Mixed alloy pairs (p=0.03), taper design (p<0.001), and component type (p=0.02) were associated with taper corrosion. The results from this study supported the hypothesis that there is taper corrosion in TKA. However the clinical implications remain unclear.
authors.affiliation: Implant Research Center, Drexel University, Philadelphia, Pennsylvania.
authors.forename: Christina M
authors.initials: CM
authors.lastname: Arnholt
authors.affiliation: Implant Research Center, Drexel University, Philadelphia, Pennsylvania.
authors.forename: Daniel W
authors.initials: DW
authors.lastname: MacDonald
authors.affiliation: Implant Research Center, Drexel University, Philadelphia, Pennsylvania.
authors.forename: Mariya
authors.initials: M
authors.lastname: Tohfafarosh
authors.affiliation: Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York.
authors.forename: Jeremy L
authors.initials: JL
authors.lastname: Gilbert
authors.affiliation: Orthopaedic Implant Retrieval Analysis Laboratory, Case Western Reserve University, Cleveland, Ohio.
authors.forename: Clare M
authors.initials: CM
authors.lastname: Rimnac
authors.affiliation: Implant Research Center, Drexel University, Philadelphia, Pennsylvania; Exponent, Inc., Philadelphia, Pennsylvania.
authors.forename: Steven M
authors.initials: SM
authors.lastname: Kurtz
authors.affiliation: Hartzband Center for Hip and Knee Replacement, Paramus, New Jersey.
authors.forename: Gregg
authors.initials: G
authors.lastname: Klein
authors.affiliation: Rubin Institute for Advanced Orthopedics, Baltimore, Maryland.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Mont
authors.affiliation: Rothman Institute, Philadelphia, Pennsylvania.
authors.forename: Javad
authors.initials: J
authors.lastname: Parvizi
authors.affiliation: Tennessee Orthopaedic Clinics, Knoxville, Tennessee.
authors.forename: Harold E
authors.initials: HE
authors.lastname: Cates
authors.affiliation: Penn Orthopaedics, Penn Presbyterian Medical Center, Philadelphia, Pennsylvania.
authors.forename: Gwo-Chin
authors.initials: GC
authors.lastname: Lee
authors.affiliation: Jewish Hospital, Louisville, Kentucky.
authors.forename: Arthur
authors.initials: A
authors.lastname: Malkani
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Cleveland, Ohio.
authors.forename: Mattheuw
authors.initials: M
authors.lastname: Kraay
mesh_terms: D000497:Alloys; D019645:Arthroplasty, Replacement, Knee; D003343:Corrosion; D020878:Device Removal; D006801:Humans; D007720:Knee Prosthesis; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation
chemical_list: D000497:Alloys
keywords: TKA; corrosion; fretting; modularity; retrieval