Details
| Original language | English |
|---|---|
| Pages (from-to) | 64-69 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 110 |
| Issue number | C |
| Early online date | 8 Jul 2022 |
| Publication status | Published - 2022 |
| Event | 5th CIRP Conference on Biomanufacturing, Cirp BioM 2022 - Calabria, Italy Duration: 22 Jun 2022 → 24 Jun 2022 |
Abstract
The improved adaption of a modular hip endoprosthesis to patient-specific anatomy by means of a neck adapter is accompanied by the risk of a higher revision rate. This is due to micromotions leading to friction wear and corrosion of the additional taper interface. This results in the need to manufacture a load-adapted interface of modular hip endoprostheses. In this study, the influence of the machining processes turning and deep rolling on the surface topography of outer tapers of TiAl6V4 ELI and CoCrMo28 was investigated. In order to gain knowledge about the junction strength in dependence of the surface topography, tapers were joined and the separation force was investigated during push out tests. Results indicate that the adjustment of surface topographies of the outer taper is associated with a higher reproducibility in deep rolling than in turning. In addition, for the turning process inner tapers have a higher scattering of the investigated roughness parameters of the surface topography than the outer tapers. For the investigated taper angle of 5.665°, the influence of the surface topography on the separation forces is not significant. However, there is a little scatter of the taper angles of the samples depending on the machining process which leads to a difference between the inner and outer taper angle. This could significantly reduce the contact area of the junction and could be an explanation for the lack of significance of the separation forces we observed. Furthermore, no significant dependence of the separation forces on material properties was observed.
Keywords
- Junction strength, Load-adapted manufacturing, Modular hip endoprosthesis, Tapered junction
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Procedia CIRP, Vol. 110, No. C, 2022, p. 64-69.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Influence of surface topography on junction strength of modular hip endoprostheses
AU - Denkena, Berend
AU - Hurschler, Christof
AU - Bergmann, Benjamin
AU - Legutko, Beate
AU - Gustav, Marco
AU - Welke, Bastian
N1 - Funding Information: The authors would like to thank the German Research Foundation for their financial support within the collaborative
PY - 2022
Y1 - 2022
N2 - The improved adaption of a modular hip endoprosthesis to patient-specific anatomy by means of a neck adapter is accompanied by the risk of a higher revision rate. This is due to micromotions leading to friction wear and corrosion of the additional taper interface. This results in the need to manufacture a load-adapted interface of modular hip endoprostheses. In this study, the influence of the machining processes turning and deep rolling on the surface topography of outer tapers of TiAl6V4 ELI and CoCrMo28 was investigated. In order to gain knowledge about the junction strength in dependence of the surface topography, tapers were joined and the separation force was investigated during push out tests. Results indicate that the adjustment of surface topographies of the outer taper is associated with a higher reproducibility in deep rolling than in turning. In addition, for the turning process inner tapers have a higher scattering of the investigated roughness parameters of the surface topography than the outer tapers. For the investigated taper angle of 5.665°, the influence of the surface topography on the separation forces is not significant. However, there is a little scatter of the taper angles of the samples depending on the machining process which leads to a difference between the inner and outer taper angle. This could significantly reduce the contact area of the junction and could be an explanation for the lack of significance of the separation forces we observed. Furthermore, no significant dependence of the separation forces on material properties was observed.
AB - The improved adaption of a modular hip endoprosthesis to patient-specific anatomy by means of a neck adapter is accompanied by the risk of a higher revision rate. This is due to micromotions leading to friction wear and corrosion of the additional taper interface. This results in the need to manufacture a load-adapted interface of modular hip endoprostheses. In this study, the influence of the machining processes turning and deep rolling on the surface topography of outer tapers of TiAl6V4 ELI and CoCrMo28 was investigated. In order to gain knowledge about the junction strength in dependence of the surface topography, tapers were joined and the separation force was investigated during push out tests. Results indicate that the adjustment of surface topographies of the outer taper is associated with a higher reproducibility in deep rolling than in turning. In addition, for the turning process inner tapers have a higher scattering of the investigated roughness parameters of the surface topography than the outer tapers. For the investigated taper angle of 5.665°, the influence of the surface topography on the separation forces is not significant. However, there is a little scatter of the taper angles of the samples depending on the machining process which leads to a difference between the inner and outer taper angle. This could significantly reduce the contact area of the junction and could be an explanation for the lack of significance of the separation forces we observed. Furthermore, no significant dependence of the separation forces on material properties was observed.
KW - Junction strength
KW - Load-adapted manufacturing
KW - Modular hip endoprosthesis
KW - Tapered junction
UR - http://www.scopus.com/inward/record.url?scp=85136280742&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2022.06.014
DO - 10.1016/j.procir.2022.06.014
M3 - Conference article
AN - SCOPUS:85136280742
VL - 110
SP - 64
EP - 69
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
IS - C
T2 - 5th CIRP Conference on Biomanufacturing, Cirp BioM 2022
Y2 - 22 June 2022 through 24 June 2022
ER -