Biomedical subjects
R L Lambert
Publications and source records attributed to R L Lambert.
Variations in the design of #330 dental burs.
This evaluation consisted of a photographic evaluation of eight brands of commercially available #330 burs; comparisons were made to the standard as set by Dr Miles Markley. They were also evaluated as to their meeting ADA Specification No 23 for dental burs. In a second portion of the study, the burs were used to prepare channels in extracted teeth, and the pattern produced was evaluated. The results indicate that there is a great difference in the shape of the burs produced by the various manufacturers, as there was in the pattern they produced in preparing tooth structure.
Self-actualization: the ultimate goal.
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When self-esteem counts: motivating employees to excel.
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Medical staff is key in hospital risk management.
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The pharmacist's clinical role as seen by other health workers.
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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.
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.
Inconsistent depth of cure produced by identical visible light generators.
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