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Biomedical subjects

T G Berry

Publications and source records attributed to T G Berry.

27 records · Page 2Linked to original sources
PubMedDate not supplied

Root caries.

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Dental Caries Susceptibility↗
PubMedDate not supplied

Comparing two methods of moisture control in bonding to enamel: a clinical study.

Twelve patients provided a total of 36 teeth to be used in this study. Visible-light-cured composite resin tabs were applied to a flattened, acid-etched surface of each tooth. Half of the teeth were isolated with cotton rolls in conjunction with a saliva ejector; the other conjunction with a saliva ejector; the other half were isolated using a rubber dam. An equal number of teeth were treated in each group for each subject to serve as a self-control. After extraction the teeth were mounted and shear bond strength of the composite resin to enamel was determined on an Instron Testing Machine. There was a significant difference in the shear bond strength between the two experimental groups.

Acid Etching, Dental↗
PubMedDate not supplied

Effects of two methods of moisture control on marginal microleakage between resin composite and etched enamel: a clinical study.

Visible light-polymerized resin composite tabs were bonded to the flattened, acid-etched surface of teeth that were scheduled for extraction. Half of the teeth (group I) were isolated with cotton rolls in conjunction with a saliva ejector. The remaining teeth (group II) were isolated using a rubber dam. Both methods of isolation were used for each patient so that to some extent all patients served as their own controls. Following extraction, all samples were thermocycled 500 times alternating between 6 degrees C and 60 degrees C, after which they were immersed in 5% methylene blue for 4 hours. Each tooth was then mounted in acrylic resin and sectioned on a hard tissue microtome. Microleakage was assessed using a light microscope at x 20 magnification. The use of rubber dam isolation resulted in less microleakage at the enamel resin interface.

Composite Resins↗
PubMedDate not supplied

The effect of setting time on the clinical performance of a high-copper amalgam alloy.

The purpose of this clinical study was to evaluate the factor of the setting rate/Eames working time on fracture at the margins of amalgams. One batch of a high-copper amalgam was modified to obtain two setting rates, one fast and one slow setting. Two dentists originally placed 134 amalgam restorations in 23 patients. Both dentists used a rubber dam throughout the restorative procedure and prepared cavities as conservatively as possible. The amalgams were condensed by hand and carved with sharp instruments. At 1 year 124 restorations and at 2 years 115 restorations were evaluated for fracture at the margins. Results indicated that there was no significant clinical difference between a slow- and fast-setting alloy, nor was there a difference between the operators.

Alloys↗