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At least 253 records · Page 14Linked to original sources
PubMed2001

A conservative aesthetic solution for a single anterior edentulous space: case report and one-year follow-up.

Conservative solutions for the restoration of a single edentulous space in the anterior maxilla present an aesthetic challenge to the clinician. Treatment options for tooth replacement include implant placement, a classical fixed partial denture, or a resin-bonded appliance with a metal substructure or fiber-reinforced resin. The resin-bonded Encore Bridge (daVinci Studios, Woodland Hills, CA) offers a restorative solution that is conservative and aesthetic when compared to the required full-tooth preparation in a conventional three-unit fixed partial denture. This case report addresses the indications, preparation guidelines, and restorative procedures for an Encore Bridge.

Adult↗
PubMed2002

Development of a quantitative method to monitor the effect of a tooth whitening agent.

This study demonstrated a quantitative method for assessing the effect of a tooth whitening agent. Forty human teeth were stained with a tea solution, and randomly assigned to two groups (A, B) of twenty teeth. The teeth were subsequently treated with either sodium hypochlorite (NaOCL) or deionized distilled water (DDW) by intermittent immersion (60 seconds on each occasion) in a 1:10 dilution of NaOCL (group A) or DDW (group B). Prior to whitening and following each immersion, the color of the teeth at the stained spot was measured using ShadeEye-Ex Dental Chroma Meter and quantitative light-induced fluorescence (QLF). ShadeEye-Ex instantly gave a numerical value for the stain intensity, chroma (C), which is the average of three measurements taken automatically by the machine. QLF gave a quantitative value for the stain, delta Q (% mm2), following analysis of the fluorescence image of the tooth. Immersion was stopped after four readings when one specimen, in group A, was observed to have regained its natural color. There was a good correlation between C and delta Q with either NaOCL (Pearson correlation coefficient (r) = 0.974; p < 0.05) or DDW (r = 0.978; p < 0.05). With NaOCL, an inverse relationship observed between stain measurements, C (Linear fit correlation (R) = -0.982; p < 0.05) or delta Q (R = -0.988; p < 0.05) and exposure time correlated to a linear fit, but not with DDW. ANOVA showed a significant difference between the means (n = 20) of the reading at the measurement intervals (0, 60, 120 and 180 seconds) for both C (p < 0.001) and delta Q (p < 0.001) with NaOCL but not with DDW. In conclusion, the study highlighted the potential of ShadeEye-Ex Dental Chroma Meter as a tool for the quantitative assessment of the gradual change in shade of discolored teeth by tooth whitening products.

Analysis of Variance↗
PubMed2000

Tooth-whitening efficacy and safety: a randomized and controlled clinical trial.

A randomized, single-center, double-blind, parallel-group, placebo-controlled trial evaluated the whitening efficacy and safety of 2-week, twice-daily use of a 5.3% hydrogen peroxide tooth-bleaching gel delivered on polyethylene film. Efficacy was based on change in Vita shade scores from baseline to the end of treatment. Thirty-three patients in each group completed treatment. Use of the peroxide-containing gel led to a mean change in baseline Vita shade score of -3.70 +/- 0.35, compared with a change of -0.87 +/- 0.24 after use of a placebo gel. After adjustment for baseline scores, the mean difference in shade change between the peroxide gel-treated group and placebo-treated group was -2.85 +/- 0.41 (P < 0.0001). Both treatments were generally well tolerated. The strips offer ease of use, comfort, and shorter duration of wear compared with other at-home bleaching systems.

Adult↗
PubMed1999

Use of a whitening dentifrice for control of chlorhexidine stain.

A major drawback to clinicians prescribing and patients using chlorhexidine rinse is the development of extrinsic staining. In order to assess the effectiveness of a whitening dentifrice in controlling chlorhexidine stain, fifty-seven subjects rinsed with chlorhexidine twice daily while brushing twice daily with either fluoridated whitening or a fluoridated regular dentifrice. Stain was assessed at 1, 2, and 3 month intervals using a stain index with two components; one with parameters for color intensity and one for tooth percentage covered with stain. Facial surfaces accumulated less stain than lingual surfaces. For many, although not all surfaces, and at many, although not all time periods, the group utilizing the whitening dentifrice exhibited less staining. It is advantageous to recommend a whitening dentifrice that has demonstrated stain suppression when prescribing a chlorhexidine rinse. Improved patient satisfaction leading to increased compliance with the antimicrobial regimen is a desired outcome.

Adolescent↗
PubMed2002

The stain prevention efficacy of two tooth whitening dentifrices.

An 8-week randomized, double-blind, parallel group clinical study was conducted to assess the extrinsic stain prevention efficacy of three commercially available dentifrices: 1) a dentifrice containing 0.243% sodium fluoride with copolymer, tetrasodium pyrophosphate, and sodium tripolyphosphate in a silica base (Product 1); 2) a dentifrice containing 0.243% sodium fluoride, baking soda and peroxide, tetrasodium pyrophosphate, and sodium tripolyphosphate in a silica base (Product 2); and 3) a dentifrice containing 0.243% sodium fluoride in a silica base (Product 3). After the collection of baseline stain scores by a trained examiner and a subsequent oral prophylaxis, 126 volunteers were randomized to one of the three treatment groups (balanced for composite extrinsic stain scores). Throughout the 8-week treatment period, subjects brushed their teeth twice daily with their assigned dentifrice. At baseline, 4-, and 8-week evaluations, extrinsic dental stain was measured on the facial surfaces of the six maxillary anterior teeth and on the facial and lingual surfaces of the six mandibular anterior teeth using the Lobene Index. A total of 120 subjects completed the study. No adverse events were reported, and subjects who discontinued the study did so for reasons unrelated to the dentifrices. At the 4-week evaluation, composite stain scores were statistically significantly lower (P < .05) for both Product 1 (44.9%) and for Product 2 (34.6%) relative to Product 3. At the 8-week evaluation, composite stain scores were statistically significantly lower (P < .05) for both Product 1 (28.4%) and for Product 2 (29.6%) relative to Product 3. The results of this clinical study demonstrate that both dentifrices, one containing 0.234% sodium fluoride with copolymer, tetrasodium pyrophosphate, and sodium tripolyphosphate in a silica base; and one with 0.243% sodium fluoride with copolymer, tetrasodium pyrophosphate, and sodium tripolyphosphate in a silica base are more effective in preventing natural extrinsic stain formation on teeth as compared with a marketed control dentifrice.

Adult↗
PubMed2002

Clinical evaluation of a 15% in-office hydrogen peroxide tooth-whitening touch-up agent.

The success of tooth whitening has increased public demand for quicker results of the tooth-whitening process. More and more patients are opting for in-office treatments, if available, to expedite the process, and they are looking for ways to re-whiten quickly when they feel their teeth have reverted from their after-treatment results. This article will discuss the use of a commercially available product as a touch-up procedure for patients who had been previously treated with a 2-week carbamide peroxide whitening regimen.

Adolescent↗
PubMed1999

[The efficacy on natural extrinsic stain of Colgate whitening dentifrice--eight-week study].

OBJECTIVE: To assess the effect on natural extrinsic dental stain by use of a dentifrice containing 1% tetrasodium polyphosphate (TSPP), 7% sodium tripolyphosphate (STPP), 0.243% sodium fluoride and 10% high cleaning silica (HCS) over an eight-week period was compared to a sodium fluoride/silica placebo dentifrice without stain removal ingredients. METHODS: Ninety one subjects were selected and stratified into two balanced groups randomly assigned to use the test dentifrice or the placebo dentifrice. The two 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 one 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, four and eight weeks. The same dental examiner conducted examinations on the subjects at each examination. RESULTS: After eight-week use of their assigned products, those subjects in the TSPP/STPP/HCS dentifrice group demonstrated a statistically significant (P = 0.0001) stain reduction of 37.1%, as compared to the fluoride placebo dentifrice group without stain removal ingredients. CONCLUSION: The use of a dentifrice containing 1% tetrasodium polyphosphate, 7% sodium tripolyphosphate, 0.243% sodium fluoride and 10% high cleaning silica is effective in reducing natural extrinsic dental stain, when compared to a placebo fluoride dentifrice.

Adolescent↗