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A multilayer approach to fabricate bioactive glass coatings on Ti alloys

Description: Glasses in the system Si-Ca-Na-Mg-P-K-O with thermal expansion coefficients close to that of Ti6Al4V were used to coat the titanium alloy by a simple enameling technique. Firings were done in air at temperatures between 800 and 840 C and times up to 1 minute. Graded compositions were obtained by firing multilayered glass coatings. Hydroxyapatite (HA) particles were mixed with the glass powder and the mixture was placed on the outer surface of the coatings to render them more bioactive. Coatings… more
Date: December 1, 1998
Creator: Gomez-Vega, J. M.; Saiz, E.; Tomsia, A. P.; Marshall, G. W. & Marshall, S. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optical Spectroscopy Study of Transparent Non-Carious Human Dentin and Dentin-Enamel Junction

Description: Improving our knowledge of the morphology, composition and properties of the dentin, enamel, and the dentin-enamel junction (DEJ) is vital for the development of improved restorative materials and clinical placement techniques. Most studies of dental tissues have used light microscopy for characterization. In our investigation, the spectroscopic properties of normal and non-carious transparent human root dentin, and the dentin-enamel junction were investigated using emission imaging microscopy,… more
Date: December 14, 1999
Creator: Marshall, G.W.; Marshall, S.J.; Gallagher, R.R. & Demos, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the development of life prediction methodologies for the failure of human teeth

Description: Human dentin is known to be susceptible to failure under cyclic loading. Surprisingly, there are few reports that quantify the effect of such loading, considering the fact that a typical tooth experiences a million or so loading cycles annually. In the present study, a systematic investigation is described of the effects of prolonged cyclic loading on human dentin in a simulated physiological environment. In vitro stress-life (S/N) data are discussed in the context of possible mechanisms of fat… more
Date: September 18, 2002
Creator: Nalla, R. K.; Imbeni, V.; Kinney, J. H.; Marshall, S. J. & Ritchie, R. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the mechanistic role of the dentin-enamel junction in preventing the fracture of human teeth

Description: The dentin-enamel junction (DEJ), which is the interface between the dentin and outer enamel coating in teeth, is known for its unique biomechanical properties that provide a crack-arrest barrier for flaws formed in the brittle enamel. In this work, we re-examine how cracks propagate in the proximity of the DEJ, and specifically quantify, using interfacial fracture mechanics, the fracture toughness of the DEJ region. Additionally, we show that the vital function of the DEJ, in preventing cracks… more
Date: September 1, 2004
Creator: Imbeni, V.; Kruzic, J. J.; Marshall, G. W.; Marshall, S. J. & Ritchie, R. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the in vitro fatigue behavior of human dentin with implications for life prediction

Description: Although human dentin is known to be susceptible to failure under repetitive cyclic fatigue loading, there are few reports in the literature that reliably quantify this phenomenon.
Date: April 1, 2002
Creator: Nalla, R. K.; Imbeni, V.; Kinney, J. H.; Staninec, M.; Marshall, S. J. & Ritchie, R. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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