title: Correlation of corrosion and biomechanics in the retrieval of a single modular neck total hip arthroplasty design: modular neck total hip arthroplasty system.
abstract: Increased modularity of total hip arthroplasty components has occurred, with theoretical advantages and disadvantages. Recent literature indicates the potential for elevated revision rates of modular neck systems and the potential for local pseudotumor and metallosis formation at the modular neck/stem site. Retrieval analysis of one modular neck implant design including SEM (SCANNING ELECTRON MICROSCOPY) assessment was done and correlated with FEA (finite element analysis) as well as clinical features of patient demographics, implant and laboratory analysis. Correlation of the consistent corrosion locations to FEA indicates that the material and design features of this system may result in a biomechanical reason for failure. The stem aspect of the modular neck/stem junction may be at particular risk.
authors: Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ontario, Canada.
authors: Brent A
authors: BA
authors: Lanting
authors: Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ontario, Canada.
authors: Matthew G
authors: MG
authors: Teeter
authors: Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ontario, Canada.
authors: Edward M
authors: EM
authors: Vasarhelyi
authors: Imaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada.
authors: Todor G
authors: TG
authors: Ivanov
authors: Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ontario, Canada.
authors: James L
authors: JL
authors: Howard
authors: Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ontario, Canada.
authors: Douglas D R
authors: DD
authors: Naudie
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods; D001696:Biomechanical Phenomena; D003343:Corrosion; D020878:Device Removal; D019544:Equipment Failure Analysis; D005260:Female; D005271:Femur Head Necrosis / Q000601:surgery*; D020342:Finite Element Analysis; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012189:Retrospective Studies
keywords: metallosis; modular neck; modular total hip; pseudotumor