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Fracture toughness of acrylic bone cement: test method and material evaluation
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In fracture toughness of acrylic bone cement, there is an important lack of consistency in the testing carried out by different researchers. The aim of this thesis was to provide the Interdisciplinary Research Centre, IRC, at Queen Mary, London, with an efficient test method following the American Society for Testing and Materials, ASTM, standard D5045-99, for measuring the fracture toughness of acrylic bone cement. The test method employs the compact tension specimen, a combination of machined-, fatigue-, and razor blade pre-notching and a loading rate of 0.5 mm.min-1 and follows ASTM standard D5045-99. Plane strain and linear elastic behaviour was assumed in the calculation of KIc, the stress intensity factor. Each test, including pre-cracking, had a duration of 1 to 2 hours. Using the test method developed, 5 different cements were tested and the results evaluated with the help of GPC results, water uptake measurements and SEM microscopy of the fracture surfaces. Parameters investigated include storage in saline solution and mixing method, hand mixed compared to vacuum mixing. The tested cements were Palacos*R with and without gentamicin, VersabondÔ, Surgical SimplexÒP and an experimental cement developed at the IRC. Palacos*R and VersabondÔ were found to display the highest values and SimplexÒP the lowest. Storage and mixing method were found to have varying effects on different cements. Palacos*R was found to be minimally affected by vacuum mixing and in some cases even negatively. VersabondÔ was positively affected. Storage in saline solution initially caused the fracture toughness of Palacos*R to decrease but eventually returned to the value prior to storage. The experimental cement was positively affected by storage and increased its fracture toughness value by 42%.

Place, publisher, year, edition, pages
Keyword [en]
Technology, acrylic bone cement
Keyword [sv]
URN: urn:nbn:se:ltu:diva-46545ISRN: LTU-EX--02/190--SELocal ID: 42b431d7-516c-4d88-be92-27673ecdffecOAI: diva2:1019860
Subject / course
Student thesis, at least 30 credits
Educational program
Materials Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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