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Biomedical subjects

W B Eames

Publications and source records attributed to W B Eames.

At least 19 recordsLinked to original sources
PubMed1992

The sealants question.

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Dental Restoration, Temporary↗
PubMed1979

Elastomeric impression materials: effect of bulk on accuracy.

Impression trays were fabricated providing 2, 4, and 6 mm spaces to determine the stability and accuracy of nine elastomeric impression materials on a simulated full crown preparation steel die. The interface space of 2 mm produced the most accurate impressions for all of the materials tested. All impression materials except one fell within the revised American Dental Association Specifications. The clinical-type tests, using castings on dies poured from these materials, corroborated the acceptance of those materials and techniques exhibiting the least dimensional change.

Dental Impression Materials↗
PubMed1979

Pulpal response in rhesus monkeys to cementation agents and cleaners.

The purpose of these studies was to compare pulpal inflammatory responses induced by cementation of precision amalgam inlays with zinc phosphate cement, with and without a Hydroxyline liner, Durelon cement, and ZOE controls. Hydraulic force was induced by the inlay insertion procedure. Cavilax, water, and polyacrylic acid were compared with ZOE controls. Both studies also used untreated teeth for comparison. The use of zinc phosphate luting cement in the 48-hour inlay study was the only condition provoking moderate to severe responses. Zinc phosphate cement over Hydroxyline liner and Durelon cement in the study of inlays and Cavilax cleaner, water, and polyacrylic acid in the study of cleaners showed mild responses comparable to the ZOE control in the 48-hour and in the 45-day periods.

Acetone↗
PubMed1978

Techniques to improve the seating of castings.

A convergence of 20 degrees for full crowns is the most likely to be seen clinically, as determined by random measurements taken at a dental laboratory. Castings did not seat without cement, by an average of 215 micron at 10 degrees of convergence, or by 99 micron at 20 degrees of convergence. Biting forces will seat a casting approximately 150 micron, but will cause random concentrations of force against tooth structure, thus compressing it. All castings tend to rebound from this position. Zinc phosphate and polycarboxylate cemented crowns seated to 33 micron and 20 micron respectively when relieved, but each were elevated to 112 micron when not relieved. A silicophosphate cement displaced crowns with 20 degrees of convergence 122 micron under "ideal" clinical conditions, even when relieved; and with CBA 9080 cement, more than 500 micron. A die relief method was found to be the most suitable of the three casting compensation techniques. Casting retention, after cementation, was increased by 25%.

Cementation↗
PubMed1978

Broken diamonds.

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Dental Instruments↗