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Results for “TOOTH DISCOLORATION”

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At least 1,297 records · Page 72Linked to original sources
PubMed1998

Laboratory assessment of tooth whitening by sodium bicarbonate dentifrices.

The increasing emphasis on dental aesthetics has made tooth whitening an important function of a dentifrice. This laboratory study investigated the whitening effect of toothbrushing with sodium bicarbonate-based dentifrices compared with standard dentifrices that do not contain sodium bicarbonate. Six dentifrices and a distilled water control were tested for their ability to whiten teeth with intrinsic stain. The dentifrices contained different abrasive systems: (1) 45% NaHCO3; (2) 65% NaHCO3 (Arm and Hammer Dental Care); (3) 94% NaHCO3; (4) 94% NaHCO3 + 1.5% H2O2; (5) silica (Crest Regular Toothpaste); and (6) dicalcium phosphate (Colgate Regular Toothpaste). After a thorough rubber cup cleaning with a pumice slurry, the intrinsic color of the test teeth with a Vita shade of A3 or darker was measured with a spectrophotometer using the standard L*a*b* color scale. Measurements were taken on a total of 12 teeth per test dentifrice before treatment, and after 30, 60, 90 and 120 minutes of mechanical toothbrushing. No changes in L* (lightness/brightness) or a* (red-green hue) occurred, but significant differences in b* (yellow-blue hue) were observed over time. Compared to baseline tooth color, all four sodium bicarbonate-based dentifrices were significantly effective in removing the yellow intrinsic tooth stain, while the water control, silica dentifrice, and dicalcium phosphate dentifrice demonstrated no significant change. Between-group comparisons showed that the four dentifrices containing sodium bicarbonate were significantly more effective than the water and dicalcium phosphate dentifrice groups. The commercial dentifrice containing 65% sodium bicarbonate was also more effective than the commercial silica dentifrice. Although continued toothbrushing from 30 to 120 minutes resulted in additional stain removal, most of the tooth whitening by the sodium bicarbonate-based dentifrices occurred in the first 30 minutes of brushing. In the studies conducted, dentifrices containing high concentrations of sodium bicarbonate were more effective at removing intrinsic tooth stain than dentifrices that do not contain sodium bicarbonate.

Dentifrices↗
PubMed1998

Dentifrice whitening after professional bleaching.

Thirty patients whose teeth had been bleached were given one of two toothpastes. One half of the group brushed with a toothpaste containing 10% carbamide peroxide (DW) and the other half with a toothpaste containing 3% hydrogen peroxide (HP) for three months. Color change from baseline was evaluated after 4 weeks and again after 12 weeks, using a shade guide and measured with a colorimeter at baseline. The DW toothpaste was able to stabilize the tooth-lightening effect of the bleaching gel better than the HP toothpaste. The HP product had a lower tooth sensitivity rating.

Analysis of Variance↗
PubMed1975

A short-term evaluation of a chlorhexidine gel on plaque deposits and gingival status.

A gel containing 0.5% chlorhexidine gluconate was tested for its ability to affect plaque formation and the gingival status of twelve male dental students in a controlled double-blind cross-over study. The chlorhexidine gel significantly reduced plaque formation when compared with the placebo gel, but the improvement in gingival health was not statistically significant.

Adolescent↗
PubMed1975

A case of salvage.

Explore the source record for details and available documents.

Esthetics, Dental↗
PubMed1999

Efficacy of two dentifrices on removal of natural extrinsic stain.

PURPOSE: To evaluate the 6-week effect on natural extrinsic dental stain from the use of a dentifrice containing 10% aluminum oxide, 1500 ppm sodium monofluorophosphate in a precipitated calcium carbonate (PCC) base or a second dentifrice containing 0.5% calcium peroxide (CP), 1500 ppm sodium monofluorophosphate in a PCC base compared to a fluoride placebo dentifrice without stain removal ingredients. MATERIALS AND METHODS: A total of 94 subjects were entered in the study, and stratified into three balanced groups according to their baseline mean Lobene Stain Index scores. The three groups were randomly assigned to use one of the two test dentifrices or the placebo dentifrice. The three groups were well balanced with regard to their mean baseline stain index scores, gender and tobacco habits. Subjects were instructed to brush their teeth twice daily (morning and evening) for 1 minute with their assigned dentifrice and a commercially available soft bristled toothbrush. Extrinsic dental stain examinations, which included mean stain area and mean stain intensity, were conducted at baseline and 6 weeks. Examinations were conducted by the same dental examiner (F.A.) on the subjects at each examination. RESULTS: After 6 weeks' use of their assigned products, those subjects in the aluminum oxide/PCC dentifrice group and those subjects in the CP/PCC dentifrice group demonstrated statistically significant improvements, as compared to the fluoride placebo dentifrice group without stain removal ingredients.

Adolescent↗
PubMed1999

The current status of vital tooth whitening techniques.

Tooth whitening of vital teeth continues to have a major impact on the practice of dentistry. The growing public interest in having whiter, brighter teeth is clearly evident in the advertisements from toothpaste manufacturers on "whitening" formulations of their products and by the number of individuals seeking whitening procedures from their dentists. In addition, new over-the-counter whitening products continue to emerge in a marketplace that cannot seem to get teeth white enough, bright enough, fast enough. What new products and procedures have evolved over the past decade to whiten teeth? Are they better, safer, faster, and more effective now? Are dentists meeting public demand for whiter teeth and is this quest having a positive or negative impact on the practice of dentistry or the patient's dental health? I posed these questions to a group of experts on whitening procedures to get their opinions and recommendations.

Anti-Bacterial Agents↗
PubMed2000

The oral effects of smokeless tobacco.

Smokeless tobacco use has increased rapidly in North America. This form of tobacco use has many oral effects including leukoplakia, oral cancer, loss of periodontal support (recession), and staining of teeth and composite restorations. Systemic effects such as nicotine dependence, transient hypertension and cardiovascular disease may also result from smokeless tobacco use. This paper aims to guide dental practitioners in identifying oral lesions that occur due to the use of smokeless tobacco and also offer guidelines on how to counsel patients who express a desire to stop using smokeless tobacco products.

Arrhythmias, Cardiac↗