ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
PMMA remains the most popular material of bone cement for orthopaedic surgeries.However, conventional PMMA bone cement still has some problems. For this, we suggested newcomposite material (BBC) consisting of hydroxyapatite (45%), chitosan (10%) and PMMA. Thepurpose of this study was to evaluate the bonding stress at the interface of PMMA with additivesand host bone using a rabbit model. After 6, 12 weeks of operation, the bonding stresses wereevaluated by measuring shear stress through push-out test. The results of the tests showed that after6 weeks the shear stress of the BBC was 2.65±0.29MPa and the PMMA was 1.21±0.31MPa(p〈0.05). However, after 12 weeks, there were no significant differences between BBC andconventional PMMA bone cement. In SEM analysis, bone surface of BBC showed higherroughness than that of conventional PMMA bone cement after push-out test. From the study weconducted, addition of HA particles and chitosan to conventional PMMA bone cement showedpromising results. The BBC has clinical potential of bone substitutes replacing conventionalPMMA
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.373.pdf
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