title: The influence of head size on corrosion and fretting behaviour at the head-neck interface of artificial hip joints.
abstract: The primary goal of this study was to determine if head size affects corrosion and fretting behaviour at the head-neck taper interface of modular hip prostheses. Seventy-four implants were retrieved that featured either a 28 mm or a 36 mm head with a metal-on-polyethylene articulation. The bore of the heads and the neck of the stems were divided into eight regions each and graded by three observers for corrosion and fretting damage separately using modified criteria as reported in the literature. The 36 mm head size featured a significant difference in the corrosion head scores (p=0.022) in comparison to the 28 mm heads. This may be attributed to a greater torque acting along the taper interface due to activities of daily living.
authors.affiliation: University of Manitoba, Department of Mechanical and Manufacturing Engineering, E2-327 Engineering and Information Technology Complex, 75A Chancellors Circle, Winnipeg, Manitoba, Canada R3T 2N2.
authors.forename: Richard M R
authors.initials: RM
authors.lastname: Dyrkacz
authors.forename: Jan-M
authors.initials: JM
authors.lastname: Brandt
authors.forename: Olanrewaju A
authors.initials: OA
authors.lastname: Ojo
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Turgeon
authors.forename: Urs P
authors.initials: UP
authors.lastname: Wyss
mesh_terms: D000368:Aged; D003343:Corrosion; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D011474:Prosthesis Design / Q000009:adverse effects*; D011475:Prosthesis Failure / Q000209:etiology*