Whitening Dentifrices Effect on Enamel with Orthodontic Braces after Simulated Brushing.

Objective:  This study aimed to evaluate the effects of whitening dentifrices on enamel color, the shear bond strength of orthodontic brackets and adhesive remnant index (ARI).

Materials And Methods:  Eighty bovine teeth with brackets were randomly divided into four groups ( = 20): control group (GC)-water, test group 1 (GT1)-Colgate Total 12, test group 2 (GT2)-Curaprox Black Is White, and group test 3 (GT3)-Luminous White. All groups were submitted to brushing, simulating 12 months.

Effect of surface protection on the permeability of eroded dentin.

Context: Eroded dentin might present the opening of dentinal tubules, increasing permeability, and consequently dentinal hypersensitivity.

Aims: This study evaluated the permeability of dentin surfaces exposed to different levels of erosion and methods of surface protection.

Materials And Methods: Dentine samples (3 mm × 3 mm × 1 mm) were prepared from bovine incisors ( = 90) and divided into three groups according to the method of controlling erosive challenge: Negative control, topical fluoride application, and glass ionomer sealant.

Surgical elevation of bilateral maxillary sinus floor with a combination of autogenous bone and lyophilized bovine bone.

Aim: Realize the surgery of sinus lifting floor to allow the installation of osseointegrated implants for oral rehabilitation, with the combination of different biomaterials, autogenous bone and lyophilized bovine bone.

Background: Oral rehabilitation using the installation of osseointegrated implants is an alternative surgical approach that results in the satisfactory form, function and esthetics of the dental units.

Case Report: After clinical, dental and laboratory assessment, a 47-year-old female patient underwent full maxillary oral rehabilitation involving the installation of osseointegrated implants to allow her to meet the physiological demands of occlusion and mastication.

Cigarette smoke combined with staining beverages decreases luminosity and increases pigmentation in composite resin restorations.

This study evaluated the effect of cigarette smoke combined or not with colored beverages on the color change of a composite resin before and after repolishing procedures. Composite specimens were allocated into six groups (N = 10): 1) control (no colorant); 2) cigarette smoke; 3) coffee; 4) coffee and cigarette smoke; 5) red wine; and 6) red wine and cigarette smoke. During 21 days, groups 2, 4, and 6 were exposed daily to the smoke from 20 cigarettes, and groups 3, 4, 5, and 6 were immersed in coffee or red wine for 4 minutes each day.

Efficacy of 35% hydrogen peroxide on human enamel: in vitro evaluation in different tooth areas.

This study aimed to assess the efficacy of a 35% hydrogen peroxide--based gel without activation in vitro on three areas of the tooth surface. Vestibular faces of human premolar teeth were darkened, followed by two whitenings at 7-day intervals. The efficacy of whitening was determined in the cervical third, medium third and incisal third of the tooth surface with an Easyshade-Vita spectrophotometer based on the CIELab system.