Abstract

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 in position in their respective dies.

These procedures resulted in the following conclusions:

  1. The temperature range most effective for annealing cohesive gold is 600° F. to 1400° F. Alcohol lamp annealing seems to be a superior method.

  2. Hand rolled pellets produce a slightly higher B.H.N. and specific gravity reading than does laminated foil.

  3. Mat gold produces a higher B.H.N. and specific gravity reading than does gold foil, but not as high as the B.H.N. and specific gravity reading for platinized foil.

  4. A fifteen pound blow is necessary on a condenser point of .025 in, square to adequately condense cohesive gold.

  5. Blows of low frequency are more effective In the condensation of cohesive gold than those of high frequency.

  6. All methods of condensation tested, when properly applied, give approximately equal results.

Department

Dentistry

School

Graduate Studies

First Advisor

G. M. Hollenback

Second Advisor

M. R. Lund

Third Advisor

R. W. Woods

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1961

Date (Title Page)

6-1961

Language

English

Library of Congress/MESH Subject Headings

Gold Alloys; Dental Materials

Type

Thesis

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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