Details
| Original language | English |
|---|---|
| Pages (from-to) | 166-171 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 125 |
| Early online date | 6 Sept 2024 |
| Publication status | Published - 2024 |
| Event | 6th CIRP Conference on BioManufacturing, BioM 2024 - Dresden, Germany Duration: 11 Jun 2024 → 13 Jun 2024 |
Abstract
Osteoarthritis often requires surgical treatment with joint replacement. By using double modular hip endoprostheses, it is feasible to adapt the femoral angle to the patient and thus improve its biomechanics so that the anatomy of the patient can be better taken into account. Another advantage is that in case of damage of the taper, the stem can be left in the bone and only the neck adapter needs to be replaced. However, these advantages are accompanied by a higher risk of revision due to fretting of the additional connection. Fretting is influenced by angular deviations of the pairing. Therefore, the influence of the manufacturing-related angle deviations on the junction strength of the pairing Ti-6Al-4V ELI/ Ti- 6Al-4V ELI and CoCr28Mo6/ Ti-6Al-4V ELI was investigated. Initially, outer tapers with two different surface topographies and defined angular deviation were manufactured. The tapers were joined with a static force of Fassembly = 4 kN and subsequently the separation forces of the junction and the contact area after push-out tests were investigated. Material-specific differences regarding separation forces were found. The CoCr/Ti pairing shows greater average separation forces than the Ti/Ti pairing, although the resulting contact area of the Ti/Ti pairing is larger than the contact area of the CoCr/Ti. However, the resulting separation forces are independent of the investigated contact cases and the surface topography. This enables the adaption of tolerances within the manufacturing process to ensure the secure utilization of double modular hip endoprostheses.
Keywords
- Junction strength, Load-adapted manufacturing, Modular hip endoprostheses, Surface topography
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 125, 2024, p. 166-171.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Influence of manufacturing-related deviations on the junction strength of double modular hip endoprostheses
AU - Denkena, Berend
AU - Legutko, Beate
AU - Bergmann, Benjamin
AU - Hurschler, Christof
AU - Welke, Bastian
AU - Einfeldt, Ann Katrin
N1 - Publisher Copyright: © 2024 The Authors.
PY - 2024
Y1 - 2024
N2 - Osteoarthritis often requires surgical treatment with joint replacement. By using double modular hip endoprostheses, it is feasible to adapt the femoral angle to the patient and thus improve its biomechanics so that the anatomy of the patient can be better taken into account. Another advantage is that in case of damage of the taper, the stem can be left in the bone and only the neck adapter needs to be replaced. However, these advantages are accompanied by a higher risk of revision due to fretting of the additional connection. Fretting is influenced by angular deviations of the pairing. Therefore, the influence of the manufacturing-related angle deviations on the junction strength of the pairing Ti-6Al-4V ELI/ Ti- 6Al-4V ELI and CoCr28Mo6/ Ti-6Al-4V ELI was investigated. Initially, outer tapers with two different surface topographies and defined angular deviation were manufactured. The tapers were joined with a static force of Fassembly = 4 kN and subsequently the separation forces of the junction and the contact area after push-out tests were investigated. Material-specific differences regarding separation forces were found. The CoCr/Ti pairing shows greater average separation forces than the Ti/Ti pairing, although the resulting contact area of the Ti/Ti pairing is larger than the contact area of the CoCr/Ti. However, the resulting separation forces are independent of the investigated contact cases and the surface topography. This enables the adaption of tolerances within the manufacturing process to ensure the secure utilization of double modular hip endoprostheses.
AB - Osteoarthritis often requires surgical treatment with joint replacement. By using double modular hip endoprostheses, it is feasible to adapt the femoral angle to the patient and thus improve its biomechanics so that the anatomy of the patient can be better taken into account. Another advantage is that in case of damage of the taper, the stem can be left in the bone and only the neck adapter needs to be replaced. However, these advantages are accompanied by a higher risk of revision due to fretting of the additional connection. Fretting is influenced by angular deviations of the pairing. Therefore, the influence of the manufacturing-related angle deviations on the junction strength of the pairing Ti-6Al-4V ELI/ Ti- 6Al-4V ELI and CoCr28Mo6/ Ti-6Al-4V ELI was investigated. Initially, outer tapers with two different surface topographies and defined angular deviation were manufactured. The tapers were joined with a static force of Fassembly = 4 kN and subsequently the separation forces of the junction and the contact area after push-out tests were investigated. Material-specific differences regarding separation forces were found. The CoCr/Ti pairing shows greater average separation forces than the Ti/Ti pairing, although the resulting contact area of the Ti/Ti pairing is larger than the contact area of the CoCr/Ti. However, the resulting separation forces are independent of the investigated contact cases and the surface topography. This enables the adaption of tolerances within the manufacturing process to ensure the secure utilization of double modular hip endoprostheses.
KW - Junction strength
KW - Load-adapted manufacturing
KW - Modular hip endoprostheses
KW - Surface topography
UR - http://www.scopus.com/inward/record.url?scp=85204406783&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2024.08.029
DO - 10.1016/j.procir.2024.08.029
M3 - Conference article
AN - SCOPUS:85204406783
VL - 125
SP - 166
EP - 171
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 6th CIRP Conference on BioManufacturing, BioM 2024
Y2 - 11 June 2024 through 13 June 2024
ER -