[Secondary stability of cemented and non-cemented acetabular implants ex-vivo under dynamic load]

Wu, Jie and Widmer, K.-H. and Zurfluh, B. and Goepfert, Beat and Morscher, Erxin W.. (2004) [Secondary stability of cemented and non-cemented acetabular implants ex-vivo under dynamic load]. Zhonghua waike zazhi [= Chinese journal of surgery], Vol. 42, H. 20. pp. 1228-1231.

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Official URL: http://edoc.unibas.ch/dok/A5838873

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OBJECTIVE: To measure the bone-prosthetic implant interface micromovement during the application of physiological load by using a material testing system (MTS). METHODS: The cadaveric hip specimens were used to simulate a single leg stance and the joint in the neutral position. Micromovement was recorded via a 3-dimensional transducer in the acetabula of postmortem specimens, which had been preserved in formalin. The study data of the cemented and uncemented prosthsis refereed to the lone-term clinical process and the radiological status and experimental results. RESULTS: Cemented cups showed higher transverse relative motion up to 90 microm, whereas the maximum transverse movement of the non-cemented cup was 60 microm. Orthogonal motion perpendicular to the implant surface showed compression for all cups at all sites. CONCLUSION: The results indicate that there are large differences in survival time between 2 groups. That could not be compared statistically in secondary stability. Nevertheless, according to the results, the amount of micromotion of press-fit cup is relatively less than that of cemented polyethylene cup, which is instrumental in bone ingrowth and secondary stability.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedical Engineering > Imaging and Computational Modelling > Biomaterials Science Center (Müller)
UniBasel Contributors:Göpfert, Beat
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:26 Apr 2013 07:02
Deposited On:26 Apr 2013 06:57

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