The effect of chondroitin sulfate (ChS) templates on the crystal growth of hydroxyapatite (HAp) was investigated. HAp particles and 60HAp/40ChS hybrid (in wt%) were synthesized by using a precipitation method with a calcium hydroxide suspension and phosphoric acid solutions without and with ChS, respectively. The sizes of HAp crystals formed without ChS templates were around 75 nm × 10 nm while those with ChS templates were around 12 nm × 6 nm. The inhibitory effect of ChS templates on the crystal growth of HAp is explained in terms of organic matrix regulated HAp formation following steric hindrance by adjacent crystals.
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Rhee et al. (2000) studied this question.
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