title: Enamel inspired nanocomposite fabrication through amelogenin supramolecular assembly.
abstract: Fabricating the structures similar to dental enamel through the in vitro preparation method is of great interest in the fields of dentistry and material sciences. Developing enamel is composed of calcium phosphate mineral, water, and enamel matrix proteins, mainly amelogenins. To prepare a material mimicking such composition a novel approach of simultaneously assembling amelogenin and calcium phosphate precipitates by electrolytic deposition (ELD) was established. It was found that recombinant full-length amelogenin (rP172) self-assembled into nanochain structures during ELD (following increase in solution pH), and had significant effect on the induction of the parallel bundles of calcium phosphate nanocrystals, grown on semiconductive silicon wafer surface. When a truncated amelogenin (rP148) was used; no nanochain assembly was observed, neither parallel bundles were formed. The coating obtained in the presence of rP172 had improved elastic modulus and hardness when compared to the coating incorporated with rP148. Our data suggest that the formation of organized bundles in amelogenin-apatite composites is mainly driven by amelogenin nanochain assembly and highlights the potential of such composite for future application as dental restorative materials.
authors: Center for Craniofacial Molecular Biology, School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA.
authors: Yuwei
authors: Y
authors: Fan
authors: Zhi
authors: Z
authors: Sun
authors: Rizhi
authors: R
authors: Wang
authors: Christopher
authors: C
authors: Abbott
authors: Janet
authors: J
authors: Moradian-Oldak
mesh_terms: D053523:Amelogenin / Q000737:chemistry* / Q000235:genetics; D000818:Animals; D002130:Calcium Phosphates / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003743:Dental Enamel / Q000737:chemistry*; D004548:Elasticity; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics; D013314:Stress, Mechanical; D013499:Surface Properties; D013552:Swine
chemical_list: D053523:Amelogenin; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D011994:Recombinant Proteins; C020243:calcium phosphate