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At least 973 records · Page 54Linked to original sources
PubMed1979

Plaque growth and removal with daily toothbrushing.

Dental plaque growth was observed among 180 teenage boys during a 28-day period following prophylaxis. During this period, subjects brushed their teeth under supervision for 2 minutes daily. Plaque levels were measured immediately after brushing and 24 hours after brushing. Both levels increased rapidly during the first 14 days and appeared to be leveled off at 28 days. Less than half of the plaque was removed with one brushing per day leaving about 60% after brushing to promote rapid regrowth. Regrowth rate after brushing on the 28th day was 0.032 plaque units per hour over a 24-hour period. The regrowth rate for the group brushing with dentifrice was 27% lower than for the group brushing without a dentifrice.

Adolescent↗
PubMed1975

Histological evaluation of gingival damage by toothbrushing. An experimental study in dog.

The purpose of the investigation was to present an experimental model for a comparative histological evaluation of the effect on gingiva using two different types of bristle material at tooth brushing. Fifteen dogs constituted the material. Two different teeth or groups of teeth were selected on each dog. One tooths was brushed with a nylon brush. The diameter of the bristles was approximately 0.25 mm. The other tooth was brushed with a polytene brush. The diameter of the bristles vary between 0.7 mm at the base of the bristle to 0.25 mm in the near end of the bristle. Manual brushing during 10-60 seconds was carried out in 7 dogs and the other eight dogs were brushed with a mechanical device for 10-30 seconds. A histological evaluation of the relative degree of tissue damages based upon a grading of these damages in terms of a 0-3 point scale was carried out by two independent observers. Wilcoxon's matched-pair signed rank test was applied for a statistical analysis of the result of the histological examination. The conclusion was that the two different types of brushes most likely cause different damages on the gingival tissue and that the polytene brush appeared to cause less tissue damage than the nylon brush.

Animals↗
PubMed1984

Abrasion of acrylic veneers by simulated toothbrushing.

The abrasion responses were tested on four acrylic veneer materials, K + B Plus, K + B 75, Isosit, and Ivocron. The studies were performed in two independent research laboratories. Two different brushing machines were used with an abrasive slurry. The results were used for comparing the degree of abrasion for the resin materials. Three analytical methods of measuring the degree of abrasive wear were used: surface profile measurement, microscopic evaluation, and measurement of loss of volume. Isosit showed the best abrasion resistance of the four materials tested.

Acrylic Resins↗