A STUDY OF FACTORS AFFECTING THE SETTING EXPANSION OF DENTAL GYPSUM MATERIALS

Abstract

The purpose of this project is to determine the factors which affect the setting expansion of dental gypsum material. This progress report covers the work done on one phase of this project; namely the investigation of the influence of manipulative and environmental factors on the effective setting expansion of gypsum-base casting investments under conditions of practical usage. The results indicate that the effective setting expansion is significantly influenced by the nature of the asbestos-lined ring and the wax pattern shape and only slightly influenced by manipulative factors such as degree of spatulation and water/powder ratio. In addition, the prediction of effective setting expansion cannot be made on the basis of linear trough measurements. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1962
Accession Number
AD0270182

Entities

Organizations

  • University of Oregon

Tags

DTIC Thesaurus Topics

  • Asbestos
  • Business Administration
  • Chemical Compounds
  • Fibers
  • Investments
  • Materials
  • Measurement
  • Mineral Fibers
  • Textiles

Readers

  • Mathematics or Statistics
  • Pavement Materials Engineering.
  • Systems Analysis and Design