title: Contribution of Surface Polishing and Sterilization Method to Backside Wear in Total Knee Arthroplasty.
abstract: The purpose of this study was to compare the relative contributions of backside wear from polished and roughened tibial baseplates and different sterilization methods. Three groups of tibial inserts of the same design were matched: roughened gamma-air (RGA), polished gamma-air (PGA), and polished gas-plasma (PGP). Visual damage scoring and micro-CT deviation maps were used for evaluation. Total backside damage was higher (P=0.045) in RGA (13.8±3.4) compared to PGA (8.7±3.4) and PGP (8.2±4.8). Backside wear rates were greatest (P=0.02) in RGA (0.038 mm/year), followed by PGA (0.012 mm/year), and lowest in PGP (0.009 mm/year). Use of a roughened tibial baseplate had a greater effect on wear magnitude than sterilization method.
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada; Department of Medical Biophysics, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada; Surgical Innovation Program, Lawson Health Research Institute, London, Ontario, Canada.
authors.forename: Matthew G
authors.initials: MG
authors.lastname: Teeter
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada.
authors.forename: Brent A
authors.initials: BA
authors.lastname: Lanting
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada.
authors.forename: Kush R
authors.initials: KR
authors.lastname: Shrestha
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada.
authors.forename: James L
authors.initials: JL
authors.lastname: Howard
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada.
authors.forename: Edward M
authors.initials: EM
authors.lastname: Vasarhelyi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D001672:Biocompatible Materials; D001860:Bone Plates; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013242:Sterilization; D013499:Surface Properties; D013977:Tibia / Q000601:surgery; D055114:X-Ray Microtomography
chemical_list: D001672:Biocompatible Materials; D020959:Polyethylene
keywords: backside wear; damage; sterilization; surface roughness; tibial baseplate