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Pre-heating of components in cemented total hip arthroplasty

Jafri, A. A. and Green, S. M. and Partington, P. F. and McCaskie, A. W. and Muller, S. D. (2004) Pre-heating of components in cemented total hip arthroplasty. Journal of Bone and Joint Surgery, 86B (8). pp. 1214-1219. ISSN 0301-620X

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Abstract

Fatigue fractures which originate at stress-concentrating voids located at the implantcement interface are a potential cause of septic loosening of cemented femoral components. Heating of the component to 44degreesC is known to reduce the porosity of the cement-prosthesis interface. The temperature of the cement-bone interface was recorded intral-operatively as 32.3degreesC. A simulated femoral model was devised to study the effect of heating of the component on the implant-cement interface. Heating of the implant and vacuum mixing have a synergistic effect on the porosity of the implant-cement interface, and heating also reverses the gradients of microhardness in the mantle. Heating of the implant also reduces porosity at the interface depending on the temperature. A minimum difference in temperature between the implant and the bone of 3degreesC was required to produce this effect. The optimal difference was 7degreesC, representing a balance between maximal reduction of porosity and an increased risk of thermal injury. Using contemporary cementing techniques, heating the implant to 40degreesC is recommended to produce an optimum effect.

Item Type: Article
Journal or Publication Title: Journal of Bone and Joint Surgery
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 57911
Deposited By: ep_importer_pure
Deposited On: 17 Oct 2012 09:55
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:05
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57911

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