TY - JOUR
T1 - Running-in friction of hip joint replacements can be significantly reduced
T2 - The effect of surface-textured acetabular cup
AU - Nečas, David
AU - Usami, Hatsuhiko
AU - Niimi, Tatsuya
AU - Sawae, Yoshinori
AU - Křupka, Ivan
AU - Hartl, Martin
N1 - Funding Information:
The research was carried out under the project JSPS/OF280, PE17046 with financial support from the Japan Society for the Promotion of Science. This research was also supported by the project FSI-S-17-4415 with financial support from the Ministry of Education, Youth and Sports of the Czech Republic (MEYS). The study was also supported by the project LTAUSA17150 with financial support from MEYS. The authors would like to thank Kanefusa Corporation for dimple manufacturing and M. Černohlávek for his help with the experiments.
Funding Information:
The research was carried out under the project JSPS/OF280, PE17046 with financial support from the Japan Society for the Promotion of Science. This research was also supported by the project FSI-S-17-4415 with financial support from the Ministry of Education, Youth and Sports of the Czech Republic (MEYS). The study was also supported by the project LTAUSA17150 with financial support from MEYS. The authors would like to thank Kanefusa Corporation for dimple manufacturing and M. ?ernohl?vek for his help with the experiments.
Publisher Copyright:
© 2019, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated with wear-related complications persists as the main drawback. Therefore, improved tribological performance is required in order to extend the service life of replacements. The effect of surface texturing of ultra-high molecular weight polyethylene (UHMWPE) acetabular cup was investigated in the present study. Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup. The experiments with four commercial femoral components and two model lubricants were realized. The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups. Results showed remarkable lowering of friction, in general. Focusing on the simulated human synovial fluid, friction was reduced by 40% (alumina ceramic), 38.8% (zirconia toughened ceramic), 25.5% (metal), and 9.9% (oxinium). In addition, the dimples helped to keep the friction stable without fluctuations. To conclude, the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan. It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.
AB - Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated with wear-related complications persists as the main drawback. Therefore, improved tribological performance is required in order to extend the service life of replacements. The effect of surface texturing of ultra-high molecular weight polyethylene (UHMWPE) acetabular cup was investigated in the present study. Unique tilling method was utilized for manufacturing the dimples with controlled diameter and depths on the contact surface of the cup. The experiments with four commercial femoral components and two model lubricants were realized. The main attention was paid to a coefficient of friction considering the differences between the original and the dimpled cups. Results showed remarkable lowering of friction, in general. Focusing on the simulated human synovial fluid, friction was reduced by 40% (alumina ceramic), 38.8% (zirconia toughened ceramic), 25.5% (metal), and 9.9% (oxinium). In addition, the dimples helped to keep the friction stable without fluctuations. To conclude, the paper brings a new insight into frictional behaviour of the hip replacements during running-in phase which is essential for overall implant lifespan. It is believed that proper surface texturing may rapidly improve the life quality of millions of patients and may lead to considerable financial savings.
UR - http://www.scopus.com/inward/record.url?scp=85079695806&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85079695806&partnerID=8YFLogxK
U2 - 10.1007/s40544-019-0351-x
DO - 10.1007/s40544-019-0351-x
M3 - Article
AN - SCOPUS:85079695806
SN - 2223-7690
VL - 8
SP - 1137
EP - 1152
JO - Friction
JF - Friction
IS - 6
ER -
