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Understanding mechanisms and factors related to implant fixation; a model study of removal torque
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).ORCID iD: 0000-0001-8877-8236
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.ORCID iD: 0000-0002-9442-7245
2014 (English)In: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 34, no Jun, p. 83-92Article in journal (Refereed) Published
Abstract [en]

Osseointegration is a prerequisite for achieving a stable long-term fixation and load-bearing capacity of bone anchored implants. Removal torque measurements are often used experimentally to evaluate the fixation of osseointegrated screw-shaped implants. However, a detailed understanding of the way different factors influence the result of removal torque measurements is lacking. The present study aims to identify the main factors contributing to anchorage. Individual factors important for implant fixation were identified using a model system with an experimental design in which cylindrical or screw-shaped samples were embedded in thermosetting polymers, in order to eliminate biological variation. Within the limits of the present study, it is concluded that surface topography and the mechanical properties of the medium surrounding the implant affect the maximum removal torque. In addition to displaying effects individually, these factorsdemonstrate interplay between them. The rotational speed was found not to influence the removal torque measurements within the investigated range.

Place, publisher, year, edition, pages
2014. Vol. 34, no Jun, p. 83-92
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Natural Sciences
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URN: urn:nbn:se:ri:diva-6679DOI: 10.1016/j.jmbbm.2014.02.006Scopus ID: 2-s2.0-84894333338Local ID: 23659OAI: oai:DiVA.org:ri-6679DiVA, id: diva2:964519
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-08-08Bibliographically approved

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Lausmaa, JukkaStenlund, Patrik

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