title: Structural integrity of implanted WMT infinity hip and Osteonics Omnifit hip in fresh cadaveric femurs.
abstract: Five matched pairs of fresh human femurs were used to quantitatively assess the structural integrity of the implanted Wright Medical Technology modular Infinity hip and the Osteonics single-piece Omnifit hip. The results showed that neither bone implant system was able to recreate the femoral anteversion of the intact femur (p < 0.05). Although the micromotion at the bone-implant interface was well within the limits of achieving bone ingrowth, the axial micromotion was greater for the Infinity hip than for the Omnifit hip (p < 0.05), but the rotational micromotion did not show a significant difference between the two bone implant systems (p > 0.5). The anterior proximal femur deformation patterns were similar for both the two bone implant systems and intact femurs. However, the medial proximal femur deformation patterns showed that the Infinity hip-implanted femur was more similar to the intact femur than the Osteonics Omnifit hip-implanted femur.
authors.affiliation: Department of PM&R, Long Beach Veterans Affairs Medical Center, California 90822, USA.
authors.forename: T Q
authors.initials: TQ
authors.lastname: Lee
authors.forename: D A
authors.initials: DA
authors.lastname: Lewis
authors.forename: S L
authors.initials: SL
authors.lastname: Barnett
authors.forename: W C
authors.initials: WC
authors.lastname: Kim
authors.forename: S H
authors.initials: SH
authors.lastname: Anzel
mesh_terms: D002102:Cadaver; D005269:Femur; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D011180:Postmortem Changes