Dental Materials Commons^™

An Evaluation Of The Physical Properties Of Cohesive Gold (Mat And Foil), Earl W. Collard

Loma Linda University Electronic Theses, Dissertations & Projects

Methods and instruments were devised particularly for this research project on the physical properties of cohesive gold, whereby the following procedures were accomplished:

1. Cohesive gold can be annealed under controlled conditions.
2. The blow delivered by an automatic spring mallet, pneumatic mallet, and Electro-Mallet can be evaluated and controlled.
3. The condensing point can be stepped in accurate and controlled increments.
4. Increments of laminated gold can be used permitting a known thickness of foil beneath the condensing point at all times.
5. A standard analytical balance can easily be converted for specific gravity tests.
6. Specimens were tested for adaptation by air pressure while …

Accuracy Of The Indirect Method Evaluated By Mercury Micromeasurement, Estol C. Pruett

Loma Linda University Electronic Theses, Dissertations & Projects

Although the indirect method for preparing dental castings has been in use for over forty-five years, very little information has appeared in dental literature relative to its accuracy. The development of a precise and quantitative method for determining the adaptation of wax patterns or castings was necessary before such an evaluation could be considered valid. It was felt the Mercury Micromeasurement test, devised in 1958 by Hollenback, should meet these requirements. A description of the test had been published. However, at the time the project was begun, no data had appeared in the literature.

In order to establish a standard …