Inorganic cement-based systems as biomaterials
Title: Inorganic cement-based systems as biomaterials
Author(s): L. Hermansson, H. Engqvist
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 6
Abstract: Inorganic cement-based biomaterials are found within the group’s phosphates, silicates and aluminates. In this paper a comparison of the property profile of calcium phosphates (CP), calcium aluminate (CA) and calcium silicate (CS) based materials based is presented with focus on biocompatibility and mechanical properties.
Biocements are often based on various calcium phosphate salts – often in combination with Ca-sulphates. These salts can be made to cure in vivo and are attractive as replacements for the natural calcium phosphates of mineralised tissues. However, these products have low compression strength values - in the interval 10-40 MPa - and are questioned as load bearing implants.
Materials based on Ca-aluminates and Ca-silicate with chemistry similar to that of Ca-phosphates contribute to some additional features of interest with regard to dental and orthopaedic applications. These features are related to the amount of water involved in the curing process, the early and high mechanical strength obtained, and the biocompatibility profile including in situ reactions with phosphates ions of the body fluid. Compressive strength of cements based on Ca-silicate and Ca-aluminate is in the range 80-200 MPa depending on the water to cement ratio.
Online publication: 2006-08-02
Classification: 3.2 Theme 2: From Fresh to Hardened Concrete
Publication type : full_text
Public price (Euros): 0.00