The present study was designed to investigate the proliferation and expression of adhesion and extracellular matrix molecules in periodontal ligament (PDL) cells cultured on synthetic calcium phosphates, octacalcium phosphate and its hydrolyzed apatitic product comparing with those cultured on collagen and plastic substrates. Our results suggest that PDL cells expressing various integrins are attached to the synthetic biomineral analogues through collagens and fibronectin produced by themselves. These calcium phosphates relevant to biomineralization may support proliferation and adhesion of PDL cells in vivo.
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