Friction in hip-joint prostheses and its influence on the fixation of the artificial head

Autor:	U. SoltÉsz, R. SchÄfer, P.-F. Bernard
Rok vydání:	1998
Předmět:	medicine.medical_specialty Materials science medicine.medical_treatment Biomedical Engineering Biophysics Bioengineering Conical surface Prosthesis Clamping Surgery Biomaterials Fixation (surgical) medicine Implanted hip joint Biomedical engineering
Zdroj:	Journal of Materials Science: Materials in Medicine. 9:687-690
ISSN:	0957-4530
DOI:	10.1023/a:1008926213433
Popis:	The head of an implanted hip joint endoprosthesis is exposed to torques, which are transferred during gait due to the friction between the head and the cup prosthesis. In prostheses with ceramic ball heads, which are widely used now, and in which the head is fixed onto the stem by conical clamping, these torques could possibly affect the connection. In this study, torques transferred from the cup to the head are compared to the torques which are required to loosen the head from the metallic spigot. The results show that for the investigated head and taper types and sizes, under normal conditions the connection is safe with respect to undesired rotation. However, it is shown that for polluted sliding surfaces the fixation strength could possibly be exceeded. © 1998 Kluwer Academic Publishers
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed14edb78e5f0218ab9b73a48cd5b528 https://doi.org/10.1023/a:1008926213433 Zobrazit plný text záznamu Full text from SpringerLink