Abstract
The structure and properties of the crown of a human tooth were used as a model for the design and processing of dental restorative materials. The synthetic analog to the crown was composed of a dentin-like material (alumina-glass or alumina-polymer composite) and an enamel-like material (calcium phosphate-based coating). The dentin composites had high strength (~450 MPa and ~160 MPa for aluminaglass and alumina-PMMA composites, respectively) and good fracture toughness (~3.8 MPa m 1 2 and ~3.3 MPa m 1 2 for alumina-glass and alumina-PMMA composites, respectively). The calcium phosphate-based enamel region was roughly 80 μm thick, dense and fully crystalline. Bonding between the dentin and enamel in the analog was accomplished in a manner similar to the dentinoenamel junction in the natural tooth. A region of interpentrating phases from the synthetic dentin and enamel coating was created and excellent bonding was achieved using a eutectic melt in the CaO-Al2O3-SiO2 system.
Original language | English (US) |
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Pages (from-to) | 63-74 |
Number of pages | 12 |
Journal | Materials Science and Engineering C |
Volume | 3 |
Issue number | 2 |
DOIs | |
State | Published - Nov 1995 |
Keywords
- Alumina-polymer composite
- CaO-AlO-SiO system
- Crystalline microstructure
- Dentinoenamel junction
- Tooth crown