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Biomedical subjects

R L Lambert

Publications and source records attributed to R L Lambert.

At least 37 records · Page 2Linked to original sources
PubMed1980

Types of research: a synopsis of the major categories and data collection methods.

Different types of research are categorized by reviewing their characteristics and describing how they can be used. Controlled research is experimental in nature and, through a priori planning, allows manipulation of the independent variable so causality can be shown. In ex post facto research, the researcher does not have control of the independent variable and so must infer causality by measuring dependent variables within the framework of independent variables that are already established or whose changes have already taken place. Most applied research in pharmacy is of the ex post facto type. The research questions to be answered will help determine the timing of the measurement of dependent variable (i.e., measure past events or make plans to measure future events), the measuring of the dependent variable (primarily with surveys), and whether time can be used as an independent variable. The effect of time can be determined by repeated measurements over a span of time (longitudinal design) or by measurement of several groups at one point in time (cross-sectional design).

Data Collection↗
PubMed1975

Retentive properties of stainless steel pins cemented with ethyl cyanoacrylate.

The bonds provided by the ethyl cyanoacrylate is only one fifth as strong as that obtained with a self-threading pin. This retention is comparable to that of zinc phosphate-cemented pins. The simplicty and quick-setting reaction are definite advantages; however, long-term studies are needed prior to clinical acceptance.

Cyanoacrylates↗
PubMed1973

From these ashes.

Explore the source record for details and available documents.

Education, Pharmacy↗
PubMedDate not supplied

The effect of multiple layers of die-spacer on crown retention.

The application of die-spacer to crown preparation dies prior to the fabrication of the cast crown is an acceptable procedure to improve the fit of the restoration. Previous studies have shown that the retention of the restoration will be improved, unchanged, or reduced when an appropriate thickness of die-spacer is used. No studies have determined the effect on retention if excessive die-spacer is used. This study evaluated the effect of increasing die-spacer thickness on the retention of cast full crowns. Cast copings were fabricated on dies coated with either 0, 4, 8, 12, or 16 coats of die-spacer, cemented on the respective teeth, and removed using an Instron Universal Testing Machine. There were no statistically significant differences (P < or = 0.05) between the mean force required to remove the cemented copings. It appears that increasing the application of die-spacer up to 16 coats (151 micrometers) does not adversely affect the retention of cemented cast copings.

Analysis of Variance↗