PURPOSE : The aim of this study was to investigate the staining behavior demineralized enamel infiltrated by low-viscosity resin. METHODS AND MATERIALS Bovine enamel/dentin cylindrical samples (3 × 2 mm) were assigned into four groups (n=45) according treatment: sound (control), demineralization + artificial saliva, daily application 0.05% NaF, resin infiltration (Icon, DMG). Artificial white spot lesions produced in with demineralization. After treatments, color assessed spectrophotometry,...

SUMMARY Objectives: This study aimed to evaluate the bonding performance of a universal adhesive used according self-etching or etch-and-rinse protocols in noncarious cervical lesions (NCCLs) and compare two with their respective gold standard techniques. Methods Materials: randomized, double-blind clinical enrolled 34 participants who met inclusion criteria, 29 whom returned after years. They received 152 restorations bonded one three adhesives (Scotchbond Universal Adhesive, Adper Single...

Restoring Class V cavities with a regular bulk-fill composite presents more favorable biomechanical behavior than restoring nano-filled composite.

This in vitro study evaluated the effect of 35% hydrogen peroxide (HP) bleaching gel modified or not by addition calcium and fluoride on enamel susceptibility to erosion. Bovine samples (3 mm diameter) were divided into four groups (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn>15</mml:mn></mml:mrow></mml:math>) according agent: control—without (C); (HP); HP with 2% gluconate (HP + Ca); 0.6% sodium F). The gels applied...

Abstract Purpose To assess the impact of staining and multiple firings on mechanical, optical, surface characteristics zirconia‐containing lithium silicate ceramics (ZLS). Materials Methods Ninety ZLS discs (Suprinity, VITA Zahnfabrick) were divided according to “Number firings” protocol: Ctr‐control, no characterization; SC–single firing cycle (for characterization, crystallization simultaneously); DC–double (crystallization was performed separately from firing). Extrinsic pigmentation...

To evaluate the possible clinical association between dental fracture and presence of amalgam restorations, including other restorative treatments in control group. The potential fractures with wear facets restoration size was also assessed as a secondary objective. Patients fractured teeth restored silver or not were included case group (n=25). group, non-fractured teeth, selected after considering aspects, twice many patients (n=50) posterior sound (amalgam, composite resin, another...

The aim of this study was to investigate the effects some acidic drinks on dentin erosion, using methods surface profile (SP) analysis and energy-dispersive X-ray fluorescence spectrometry (EDXRF). One hundred standardized slabs obtained from bovine incisor roots were used. Dentin measuring 5x5 mm ground flat, polished half each specimen protected with nail polish. For 60 min, surfaces immersed in 50 mL 5 different (Gatorade®, Del Valle Mais orange juice®, Coca-Cola®, Red Bull® white wine),...

This study evaluated the effect of physical and chemical activation on diffusion time different concentrations hydrogen peroxide (HP) bleaching agents through enamel dentin. One hundred twenty bovine cylindrical specimens were divided into six groups ( n = 20): 20% HP ; with light activation; manganese gluconate; 35% HP; gluconate. The fixed over transparent epoxy wells internal cavities to simulate a pulpal chamber. chamber was filled an enzymatic reagent fluid. gels applied surface image...

To assess the visual perception of observers regarding perceptibility and acceptability surface gloss variations resin composites to determine limit variations.Eight composite specimens one human tooth specimen were fabricated. The polished reach a gloss, in units (GUs), 10 GU, 20 30 40 50 60 70 80 had GU. Sixty selected compare light booth. For assessment, randomly displayed two at time. Each observer performed total 144 observations. Observers answered specific questions for determining...

Owing to improvements in its mechanical properties and the availability of shade translucence resources, resin composite has become one most widely used restorative materials present day Dentistry. The aim this study was assess relation between surface hardness seven different commercial brands composites (Charisma, Fill Magic, Master Fill, Natural Look, Opallis, Tetric Ceram, Z250) degrees (translucid, enamel dentin). Vickers microhardness testing revealed significant differences among...

The purpose of this study was to evaluate the effect aging protocols on surface gloss composites. Cylindrical resin composite specimens (6 mm in diameter, 1 thick) were fabricated and divided into three groups (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn fontstyle="italic">60</mml:mn></mml:math>): microfilled (MiFi), nanohybrid (NaHy), nanofilled (NaFi). Specimens distributed four subgroups: thermocycling (5° 55°C, 15,000...

Abstract Objective This study aimed to evaluate the effect of 35% hydrogen peroxide at different pH values and degree tooth staining on whitening efficacy enamel microhardness. Materials Methods 90 enamel‐dentin specimens were obtained from bovine incisors. They randomly divided into 2 groups ( n = 45), 1 group was immersed in a broth for 14 days, another not stained kept distilled water 37°C. Twenty‐four hours after procedure, each distributed 3 subgroups that whitened by with (5, 7, 8.4)...

SUMMARY Objectives: The aim of this study was to compare the effectiveness whitening mouth rinses on teeth previously whitened or not, exposed food dyes. Methods and Materials: One hundred twenty enamel-dentin specimens, 3 mm in diameter, were obtained from bovine incisors. specimens stained for 14 days staining broth. After staining, initial color reading performed via a spectrophotometer CM-2600d (Konica Minolta). Half submitted (10% carbamide peroxide [CP]) days. They then divided into...

Aim: The purpose of this in vitro study was to evaluate the color and microhardness teeth subjected different over-the-counter (OTC) whitening products association or not with 10% carbamide peroxide (10% CP). Materials methods: Enamel-dentin specimens (n = 210) were obtained from bovine incisors stained. Half then daily cycles staining (5 minutes), CP bleaching (8 hours) OTC products, artificial saliva storage until complete 24 hours, for 2 weeks; other half staining, treatment, 12 weeks....