Reinforcement Strategies for Load-Bearing Calcium Phosphate Biocements

Materials

Martha Geffers²  Jürgen Groll²  Uwe Gbureck¹ 

[1] Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany;

关键词: calcium phosphate cements;    porosity;    fiber reinforcement;    dual setting;    mechanical properties;   

DOI  :  10.3390/ma8052700

来源: mdpi

【 摘 要 】

Calcium phosphate biocements based on calcium phosphate chemistry are well-established biomaterials for the repair of non-load bearing bone defects due to the brittle nature and low flexural strength of such cements. This article features reinforcement strategies of biocements based on various intrinsic or extrinsic material modifications to improve their strength and toughness. Altering particle size distribution in conjunction with using liquefiers reduces the amount of cement liquid necessary for cement paste preparation. This in turn decreases cement porosity and increases the mechanical performance, but does not change the brittle nature of the cements. The use of fibers may lead to a reinforcement of the matrix with a toughness increase of up to two orders of magnitude, but restricts at the same time cement injection for minimal invasive application techniques. A novel promising approach is the concept of dual-setting cements, in which a second hydrogel phase is simultaneously formed during setting, leading to more ductile cement–hydrogel composites with largely unaffected application properties.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.