This study's aim was to evaluate the degradation rate of hydrogen peroxide (H2O2) and quantify its penetration in tooth structure, considering residence time bleaching products on dental enamel. For this study, bovine teeth were randomly divided according product received: Opalescence Xtra Boost 38%, White Gold Office 35%, Whiteness HP Blue Maxx Lase Peroxide Sensy 35%. To analyze H2O2, titration agents with potassium permanganate used, while H2O2 measured via spectrophotometric analysis...

Superficial irregularities and certain intrinsic stains on the dental enamel surfaces can be resolved by microabrasion, however, treatment for such defects need to confined outermost regions of surface. Dental bleaching resin-based composite repair are also often useful situations tooth color corrections. This article presented discussed indications limitations microabrasion treatment. Three case reports treated were after 11, 20 23 years follow-ups.

The objective of this study was to evaluate the effectiveness violet light-emitting diodes (LEDs) in dental bleaching treatment when used conjunction with gels containing different concentrations hydrogen peroxide (HP). Here, 90 bovine teeth (n=15) were randomly assigned following groups: GI, placebo without light; GII, 35% HP GIII, 17.5% GIV, LED; GV, and GVI, LEDs. Three sessions 45 minutes conducted; 21 cycles involving one minute irradiation by LEDs 30-second intervals performed during...

The objective of this split-mouth clinical study was to compare a combination in-office and at-home dental bleaching with alone. Two applications were performed, one appointment per week, using 38% hydrogen peroxide. At-home performed or without 10% carbamide peroxide in custom-made tray every night for 2 weeks. factor studied the technique on two levels: Technique 1 (in-office combined home bleaching) (home only). response variables color change, sensitivity, morphology, surface roughness....

This incidence of postoperative sensitivity was evaluated in resin-based posterior restorations. Two hundred and ninety-two direct restorations were premolars molars. A total 143 Class I 149 II (MO/OD MOD) placed patients ranging age from 30 to 50 years. After the cavity preparations completed, a rubber dam placed, restored using total-etch system (Prime & Bond NT) restorative material (TPH Spectrum). The contacted after 24 hours 7, 90 days postoperatively questioned regarding presence...

Pulp capping is a procedure that comprises adequate protection of the pulp tissue exposed to oral environment, aiming at preservation its vitality and functions. This study evaluated response dental pulps dog teeth with mineral trioxide aggregate (MTA) or calcium hydroxide P.A. For purpose, 37 were divided into two groups, according material employed. Two dogs anesthetized and, after placement rubber dam, their in standardized manner protected experimental materials. The cavities then sealed...

ABSTRACT Statement of the Problem: The application surface sealant could improve quality and success composite restorations; however, it is important to assess behavior this material when subjected aging procedures. Purpose: To evaluate effect artificial on roughness microhardness sealed microhybrids nanofilled composites. Materials Methods: One hundred disc‐shaped specimens were made for each composite. After 24 hours, all samples polished was applied 50 Surface (Ra) determined with a...

Clinical Relevance The effects of dental erosion caused by acidic solutions on the surface restorative materials could be minimized application a sealant.

This study evaluated the microhardness and histomorphology of bovine enamel when 35% hydrogen peroxide is used. A total 44 specimens were adapted to removable devices used by 11 individuals subjected dental caries challenge. decrease in was observed for all groups after cariogenic Microscopic analysis revealed that fragments challenge associated with bleaching had more intense superficial histologic changes, but depth lesions remained unchanged. It concluded enhanced reduction hardness...

A white spot lesion is the first clinical sign of a caries and represents mineral loss from enamel subsurface. The purpose this study was to evaluate microhardness surface roughness lesions after application resin infiltrant subjection different challenges. Caries-like were induced in bovine discs (n=50), specimens randomly divided into five groups (n=10): demineralized (negative control, G1), infiltrated (G2), submitted brushing (G3), pH cycling (G4), artificial aging (G5). Half each used...

Abstract Hydrogen peroxide (H2O2) penetrates into the dental hard tissues causing color alteration but also alterations in pulpal tissues. Hard-tissue penetration, and pulp response were evaluated for two in-office bleaching protocols with H2O2. For trans-enamel/dentin penetration alteration, discs of bovine teeth attached to an artificial chamber bleached according groups: BLU (20% H2O2 - 1x50 min, Whiteness HP Blue); MAX (35% 3x15 Maxx); Control (1x50 placebo). Trans-enamel/dentin was...

The aim of this in vitro study was to evaluate the microhardness and surface roughness composite resins before after tooth bleaching procedures.Sixty specimens were prepared each resin (Filtek Supreme XT Opallis), BisCover LV sealant applied half specimens. Thirty enamel samples obtained from buccal lingual surfaces human molars for use as control group. measured procedures with 35% hydrogen peroxide or 16% carbamide (n = 10). Data analyzed using 1-way analysis variance Fisher test (α...

ABSTRACT Purpose To compare the color alteration, surface roughness and microhardness cross‐sectional of bovine enamel treated with at‐home whitening strips gels. Materials Methods Sixty‐six pigmented specimens ( n = 11) were allocated to six groups: C—cotton wool moistened distilled water for 1 h; SDS—sodium dithionite strip, HPS—6.5% hydrogen peroxide CPS—20% carbamide HPG—7.5% gel, CPG—10% 4 h. The treatments lasted 10 days, calculating ∆E, ∆ E 00 , W ID at baseline, 5 14 days after...

ABSTRACT The objective of this in vitro study was to quantitatively assess the effects bleaching with 10 and 15% carbamide peroxide (CP) on restoration materials by performing superficial micro‐hardness analysis. Acrylic cylindrical containers (4 × 2 mm) were filled following products: Charisma (Heraues Kulzer, Vila Santa Catarina, São Paulo, Brazil), Durafill VS (Heraeus Kulzer), Vitremer (3M, Sumaré, Dyract (Dentsply, Petropölis, Rio de Janeiro, Permite C (SDI, Brazil). Sixty samples...

The purpose of this study was to analyze the influence 10% sodium ascorbate (SA) on hybrid layer, resin tag length, and bond strength dentin after bleaching. Six groups were tested: G C, control; SA, + restoration; CP, bleaching with carbamide peroxide (CP) CP+SA, CP SA+ HP, 35% hydrogen (HP) HP+SA, HP SA restoration. After dental bleaching, exposed antioxidant solution applied before bonding procedures. teeth sectioned in mesiodistal direction. One section decalcified, specimens embedded...