configuration of anchorage holes.pdf (174.77 kB)
Configuration of anchorage holes affects fixation of the acetabular component in cemented total hip replacement - a finite element study
journal contributionposted on 2023-08-30, 13:26 authored by Rajshree Mootanah, John K. Dowell, Kevin Cheah, Paul Ingle, Julia C. Shelton
Our survey of current practice among UK orthopaedic surgeons shows wide variations in fixation techniques. The aim of this study is to investigate the effect of drilling different configurations of anchorage holes in the acetabulum on implant stability. To avoid variables that could incur during in-vitro testing, we used commercially-available COSMOS finite element analysis package to investigate the stress distributions, deformations, and strains on the cement mantle when drilling three large anchorage holes and six smaller ones, with straight and rounded cement pegs. The results, which are in line with our in-vitro studies on simulated reconstructed acetabulae, indicate better stability of the acetabular component when three larger holes than six smaller holes are drilled and when the necks of the anchorage holes are rounded. The longevity of total hip replacements could be improved by drilling three large anchorage holes, rather than many smaller ones, as initially proposed by Charnley.
Publication titleComputer Methods in Biomechanics and Biomedical Engineering
PublisherTaylor & Francis
- Accepted version