title: A novel method for measuring acetabular cup deformation in cadavers.
abstract: Press-fit acetabular shells are subject to compressive loading conditions upon insertion during surgery. These conditions may result in deformation of the shell, potentially adversely affecting the performance of any liner fitted within it. This technical note describes the method used to measure acetabular shell deformation in a cadaver study using an optical GOM ATOS Triple Scan system. Six custom-made titanium acetabular shells were scanned prior to and immediately following insertion into three cadavers (one shell per acetabulum). A three-dimensional colour map was created for each shell, and cross sections were taken at the rim to determine the maximum diametrical deformation. Values of between 30 and 150 µm were recorded, with the results suggesting a size-dependent response.
authors.affiliation: School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, UK.
authors.forename: Martin C
authors.initials: MC
authors.lastname: Bone
authors.forename: Philipp
authors.initials: P
authors.lastname: Dold
authors.forename: Markus
authors.initials: M
authors.lastname: Flohr
authors.forename: Roman
authors.initials: R
authors.lastname: Preuss
authors.forename: Tom J
authors.initials: TJ
authors.lastname: Joyce
authors.forename: David
authors.initials: D
authors.lastname: Deehan
authors.forename: James
authors.initials: J
authors.lastname: Holland
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D002102:Cadaver; D055119:Elastic Modulus; D019544:Equipment Failure Analysis / Q000379:methods*; D006245:Hardness Tests / Q000379:methods*; D006622:Hip Prosthesis; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007834:Lasers; D061825:Metal-on-Metal Joint Prostheses; D011474:Prosthesis Design; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013499:Surface Properties
keywords: Acetabular cup deformation; cadaver; optical measurement system