Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Express letter
Enhancing the mechanical properties of calcium phosphate cements using short-length polyhydroxyalkanoate fibers
Toru OGASAWARATakenori SAWAMURAHirotaka MAEDAAkiko OBATAHitoshi HIRATAToshihiro KASUGA
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2016 年 124 巻 2 号 p. 180-183

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Fibers of Poly(3-hydroxybutylate-co-4-hydroxybutylate) [P(3HB-co-4HB)], poly(L-lactic acid) (PLLA) or poly(lactic-co-glycolic acid) (PLGA) have been prepared by a polymer solution casting method. These have been incorporated (up to 3% volume) into calcium phosphate cement (CPC) to improve the mechanical properties. Semi-quantitative X-ray analysis showed that the incorporation of the fibers does not affect the formation of hydroxyapatite from the initial starting materials. Three-point bending tests showed that all polymer fibers influenced the flexural strength and elastic modulus of the fiber-reinforced CPC. P(3HB-co-4HB) and PLGA fiber reinforced CPCs displayed flexural strengths of more than 1 MPa, even after a 3-mm displacement. P(3HB-co-4HB) fiber-reinforced CPC exhibited the most bridging fibers across a crack formed by the mechanical tests. The bulk shape of the CPC reinforced with P(3HB-co-4HB) fibers was maintained at 25% of the stain in the compressive test, despite of formation of cracks.

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© 2016 The Ceramic Society of Japan
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