Indentation Damage and Mechanical Properties of Human Enamel and Dentin

  title={Indentation Damage and Mechanical Properties of Human Enamel and Dentin},
  author={H.H.K. Xu and Douglas T. Smith and Said Jahanmir and Elaine E Romberg and John Robert Kelly and Van P. Thompson and Elizabeth Dianne Rekow},
  journal={Journal of Dental Research},
  pages={472 - 480}
Understanding the mechanical properties of human teeth is important to clinical tooth preparation and to the development of "tooth-like" restorative materials. Previous studies have focused on the macroscopic fracture behavior of enamel and dentin. In the present study, we performed indentation studies to understand the microfracture and deformation and the microcrackmicrostructure interactions of teeth. It was hypothesized that crack propagation would be influenced by enamel rods and the… 
Nano-Mechanical Properties Across Dentin-Enamel Junction of Adult Human Incisors
Results suggest that the nano-mechanical property profiles across the DEJ were due to a continuous variation in the relative amount of enamel and dentin, which could be significant for describing the structural and mechanical coupling of the two structures.
The fracture behaviour of dental enamel.
Mechanical and tribological characterization of human tooth
Hidden contributions of the enamel rods on the fracture resistance of human teeth.
Mechanical behaviors of enamel, dentin, and dental restorative materials by Three-point bending test
It could be concluded that gold alloy simultaneously satisfies the requirements of having a hardness value lower than that of enamel with higher bending forces than those ofEnamel and dentin.
On the mechanical properties of tooth enamel under spherical indentation.
  • H. Chai
  • Materials Science
    Acta biomaterialia
  • 2014
Indentation damage and crack repair in human enamel.
Alteration of dentin-enamel mechanical properties due to dental whitening treatments.


Structure-Property Relations and Crack Resistance at the Bovine Dentin-Enamel Junction
The fractography revealed that the deviation of the crack path involved an area which was approximately 50-100 μm deep, which reflects the fact, that in the intact tooth, the multiple full thickness cracks commonly found in enamel do not typically cause total failure of the tooth by crack extension into the dentin.
The Microhardness of Enamel and Dentin
This research did not attempt to relate the hardness values to the histologic tooth structure, but a sufficiently large number of hardness measurements were made so that the data could be treated on a statistical basis.
Enamel Subsurface Damage Due to Tooth Preparation with Diamonds
It is concluded that subsurface damage in enamel induced by tooth preparation takes the form of median-type cracks as well as inter- and intra-rod microcracks, and that the lengths of these cracks are sensitive to diamond particle size and enamel rod orientation, but insensitive to removal rate.
Fracture Properties of Human Enamel and Dentin in an Aqueous Environment
The results of this research indicate that natural fracturing of teeth probably cannot be explained on the basis of a reduced work of fracture resulting from chewing hot or cold foods.
Compressive Properties of Enamel, Dental Cements, and Gold
The principal purpose of this investigation was to re-evaluate the compressive properties of proportional limit, compressive strength, and elastic modulus of human enamel, using improved procedures for sample preparation.
Hardness and Young's modulus determined by nanoindentation technique of filler particles of dental restorative materials compared with human enamel.
The recently developed nanoindentation technique was used to measure hardness and Young's modulus of small filler particles in resin composites and other dental restoratives, and the predominant fillers in all other materials, except amalgam and the prepolymerized resin filler in Bell Firm PX, were found to be significantly harder.
Fracture Properties of Human Teeth in Proximity to the Dentinoenamel Junction
  • S. Rasmussen
  • Materials Science, Medicine
    Journal of dental research
  • 1984
The results of this research suggest that the work of fracture of dentin increases for failure in the near vicinity of theDEJ, probably reaching a maximum at the DEJ.
Assessment by Nano-indentation of the Hardness and Elasticity of the Resin-Dentin Bonding Area
The hardness and Young's modulus of the successive layers across a resin-dentin bonding area were determined by nano-indentation for four commercially-available dentin adhesive systems, of which two
Fracture Toughness of Human Dentin
The fracture toughness of dentin is midway in the range (0.23- 6.56) observed for cortical bone and is a factor of two greater than that exhibited by most current restorative materials.
Fracture Properties of Human Enamel and Dentin
Work of fracture measurements and scanning electron microscope fractographs show that both enamel and dentin can best be considered as brittle materials with anisotropic fracture properties. Enamel