Hostname: page-component-7479d7b7d-k7p5g Total loading time: 0 Render date: 2024-07-11T17:27:32.808Z Has data issue: false hasContentIssue false

Strength of Calcium Phosphate Cements

Published online by Cambridge University Press:  26 February 2011

Alexander Veresov
Affiliation:
veres@inorg.chem.msu.ru, Moscow State University, Materials Science, Leninskie Gory, Moscow, 119992, Russian Federation, +7 495 9394609, +7 495 9390998
Alexander Stepuk
Affiliation:
astepuk@gmail.com, Moscow State University, Materials Science, Leninskie Gory, Moscow, 119992, Russian Federation
Alexander Kuznetsov
Affiliation:
akdelta@bk.ru, Moscow State University, Materials Science, Leninskie Gory, Moscow, 119992, Russian Federation
Valery Putlayev
Affiliation:
putl@inorg.chem.msu.ru, Moscow State University, Chemistry, Leninskie Gory, Moscow, 119992, Russian Federation
Vladimir Kuznetsov
Affiliation:
kamilla@imec.msu.ru, Moscow State University, Institute of Mechanics, Leninskie Gory, Moscow, 119992, Russian Federation
Get access

Abstract

Calcium phosphates materials are widely used to treat the bones defects. HA bioceramics traditionally used in medicine has some serious disadvantage – week resorbility properties. Calcium phosphate cements seems to be promising compounds to replace conventional ceramics. High macroporosity of hardened materials leads to low mechanical strength. The main objective of present work was a development of new chemically bonded materials based on α-tricalcium phosphate (α-TCP) and hydroxylapatite phase. The main idea was to combine the benefit of ceramics technology (compacting of powders to reduce the starting macroporosity) to improve the materials strength with advantages of cement product (small resorbable calcium phosphate particles). α-Ca3(PO4)2-based biocements were synthesized with initial composition of HA, α- and β-TCP containing 80% wt. of TCP phase. The rate of α-TCP transformation to apatite phase during setting reaction was about 20% wt. in case of cylindrical samples (8mm × 8 mm) at 60°C for 50 hours. The fabricated TCP – bio-composites demonstrated high mechanical strength and stiffness characteristic. Most efficient results were achieved with chitosan biopolymer containing samples (σc = 120 MPa).

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Suchanek, W., Yashimura, M.. Processing and properties of hydroxyapatite-based biomaterials for use as hard tissue replacement implants. J. Mater. Res., 13, 94117 (1998).Google Scholar
2. Barralet, J.E. et al. High-strength apatitic cement by modification with α-hydroxy acid salts. Adv. Mater., 15, 20912094 (2003).Google Scholar