Results 141 to 150 of about 1,219 (190)

Modeling the surface contamination of dental titanium investment castings

Dental Materials, 2005
The objective of this study was to develop a computational tool for assisting the design of titanium dental castings with minimal defects and to compare computational simulations with casting experiments.Modeling. An in-house cellular-automata solidification and finite-difference diffusion program was coupled with a commercial casting program and ...
Peter D Lee
exaly   +6 more sources

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An improved dental casting investment

European Journal of Oral Sciences, 1980
Abstract –In the present investigation a gypsum‐bonded investment is presented with negligible setting expansion and a thermal expansion of 1. 7%. This investment can and should be used without a steel casting ring. In combination with an earlier described die‐spacing technique the new investment facilitates the production of gold inlays and crowns ...
Knud Dreyer Jørgensen, Werner Finger
exaly   +3 more sources

Modeling the investment casting of a titanium crown

Dental Materials, 2007
Objective: The objective of this study was to apply computational modeling tools to assist in the design of titanium dental castings. The tools developed should incorporate state-of-the-art micromodels to predict the depth to which the mechanical ...
Peter D Lee, D M Maijer, D․ M․ Maijer   +2 more
exaly   +3 more sources

The determination of phosphorus containing compounds in dental casting investment products by 31P solid-state MAS-NMR spectroscopy

Dental Materials, 2007
To use 31P solid-state MAS-NMR to determine the phosphorus compounds that occur in dental casting investment material: (a) as-received, (b) after setting and (c) after burn-out and discover whether such compounds are the same in each material across a ...
Chudek, John A., Lloyd, Charles H., Scrimgeour, Sheelagh N.   +2 more
exaly   +2 more sources

31P solid-state MAS-NMR spectroscopy of the compounds that form in phosphate-bonded dental casting investment materials during setting

Dental Materials, 2007
ObjectivesTo use 31P solid-state MAS-NMR to determine which compounds form in phosphate-bonded dental casting investment material during setting, when the ambient temperature is altered.
Chudek, John A., Cowper, George A., Lloyd, Charles H., Scrimgeour, Sheelagh N.   +3 more
exaly   +2 more sources

Permeability and porosity of dental casting investments

The Journal of Prosthetic Dentistry, 1975
Permeability of various gypsum- and phosphate-bonded investments was measured during conventional burn-out procedures. Porosity determinations were made on specimens cooled to room temperature after burn-out. As a group, the gypsum-bonded investments were found to be more permeable than the phosphate-bonded investments. Two phosphate-bonded investments
G T, Ballard, K F, Leinfelder, D F, Taylor   +2 more
openaire   +2 more sources

The hygroscopic setting. Expansion of a dental casting investment

Journal of Prosthetic Dentistry, 1953
F A Peyton
exaly   +2 more sources