Abstract：
:This study evaluated the effects of acid etching of the enamel and the combination of different light sources (halogen light, light-emitting diodes [LEDs], and LED/Laser) and the bleaching product on color change, penetration of hydrogen peroxide (H2O2), and cytotoxicity over time. The color change (ΔE) and the amount of H2O2 that permeated the tooth tissue were analyzed using a spectrophotometer. Cell metabolism and morphology were evaluated using the methylthiazol tetrazolium assay and scanning electron microscopy, respectively. The ΔE values and H2O2 permeation were not significantly different under any of the experimental conditions. Tooth whitening significantly reduced cell metabolism, regardless of whether a light source was used. Preconditioning the enamel did not influence the cellular metabolism in any group. In conclusion, combining the bleaching product with different light sources and/or preconditioning the enamel resulted in few significant changes in color, transenamel and transdentinal penetration of H2O2, or cytotoxicity and cell morphology.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Gonçalves RS,Costa CA,Soares DG,dos Santos PH,Cintra LT,Briso ALdoi
10.2341/14-364-Lsubject
Has Abstractpub_date
2016-01-01 00:00:00pages
83-92issue
1eissn
0361-7734issn
1559-2863journal_volume
41pub_type
杂志文章abstract：:The purpose of this study was to develop an accurate and reproducible intraoral method of measuring the distance between two teeth, and to conduct a clinical pilot study of the effect of placement of a class 2 posterior resin restoration upon this intertooth dimension. A Kaman Sciences KD-2611 noncontact displacement ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1989-10-01 00:00:00
abstract：:This study evaluated the influence of ceramic thickness and ceramic materials on fracture resistance of posterior partial coverage ceramic restorations. Forty extracted molars were allocated into four groups (n=10) to test for two variables: 1) the thickness of ceramic (1 mm or 2 mm) and 2) the ceramic materials (a li...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-459-L
更新日期：2015-03-01 00:00:00
abstract：UNLABELLED:Examining three bleaching systems, this in vivo clinical trial evaluated the relationship among tooth sensitivity, light activation, and agent concentration, and it correlated dental sensitivity with tooth thickness. MATERIALS AND METHODS:Eighty-seven volunteer patients were included. Inclusion criteria wer...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/12-335-C
更新日期：2013-09-01 00:00:00
abstract：:Treatment of a caries active patient requires the clinician to be knowledgeable in the restorative and risk management issues with which these patients often present. Modifications of risk factors that promote dental caries play an important part in the long-term restorative success in these patients. Patient complian...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2002-03-01 00:00:00
abstract：:This study investigated the influence of light energy density (intensity x time) on the effectiveness of composite cure in view of the curing profiles of new light-polymerization units. This investigation used a digital microhardness tester to evaluate the hardness of the top/bottom surfaces and hardness ratio of 2 mm...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2001-09-01 00:00:00
abstract：:This study evaluated the pulp biocompatability of a new light-cured composite resin which was placed in etched glass-ionomer-lined cavities of monkey teeth. The pulpal response to this material was less than that to zinc-oxide eugenol cement in each observation period. Therefore this material seems to meet acceptable ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1991-07-01 00:00:00
abstract：:This study assessed the in vitro influence of surface sealing on the surface roughness of a posterior resin composite before and after toothbrushing. Thirty specimens (13 mm diameter x 1 mm high) were fabricated from Filtek-P60 resin composite and randomly assigned to three groups (n = 10): a non-sealed control and tw...
journal_title：Operative dentistry
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：2003-05-01 00:00:00
abstract：:Retained primary teeth in the smile zone can cause patient dissatisfaction, especially if associated with malposition of teeth. Orthodontic and prosthetic treatment options to treat the situation may not be accepted by some patients. Therefore, these patients tend to maintain their primary teeth and seek different est...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-363-S
更新日期：2017-03-01 00:00:00
abstract：:The aim of the present study was to evaluate the effect of composite resin contamination with powdered and unpowdered latex gloves on the shear bond strength of etch-and-rinse and two-step self-etch adhesive systems. Standard flat dentin surfaces were prepared on the facial aspect of 120 bovine incisors and randomly a...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-088-L
更新日期：2012-09-01 00:00:00
abstract：:This study evaluated (1) the effect of known reductions in the output of curing lights on the depth of cure of various resins as determined by hardness measurements, and (2) the ability of the clinician to detect reduced light output by use of an explorer to compare the hardness of the top and bottom surfaces of resin...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1994-03-01 00:00:00
abstract：:This study examined the effect of different light activation modes for light-cured resin-based composites on the shear bond strength to dentin of two one-bottle adhesives with differing acidity. In this experimental study, a flat middle dentin surface was prepared on 110 extracted sound molars using a 600-grit polish ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/08-048-L
更新日期：2009-09-01 00:00:00
abstract：:This study compared the clinical performance of a nanofilled resin composite for posterior restorations with 2 microhybrid and 1 packable composite after 12 months of clinical service. Forty-two patients with at least 5 Class I or II restorations under occlusion were enrolled in this study. A total of 148 restorations...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/05-103
更新日期：2006-07-01 00:00:00
abstract：:This study compared the degree of marginal leakage of a compomer in Class V cavities of human primary molars prepared by a conventional dental bur and air abrasion with or without acid etching. Fifty-six non-carious extracted primary molars were randomly divided into four groups (n=14) to be prepared by four technique...
journal_title：Operative dentistry
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：2005-03-01 00:00:00
abstract：CLINICAL RELEVANCE:Computer-aided design/computer-aided manufacturing (CAD/CAM) composite resins are susceptible to degradation by dietary solvents. Dietary counselling is prudent when placing such CAD/CAM restorations. SUMMARY:This study determined the effect of dietary solvents on the surface roughness (Ra) of direc...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-070-L
更新日期：2020-07-01 00:00:00
abstract：:The steady increase in online health information seeking by patients is ingrained in central notions of patient-centered care and shared decision-making models reflected in operative dentistry and the healthcare industry at large. More patients today seek health information prior to an appointment, communicate their f...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/14-312-LIT
更新日期：2015-09-01 00:00:00
abstract：:This study evaluated the effect of two dentin disinfectants (Consepsis, Tubulicid), one aqueous HEMA solution (Aqua Prep), a combination of Aqua Prep and Tubulicid and an air abrasion treatment (50 microns aluminum oxide) on the shear bond strength (SBS) of two acetone-based single bottle adhesives (One Step and Prime...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2001-11-01 00:00:00
abstract：:In the direct treatment of cervical lesions and to improve the impression-making procedure prior to fabricating indirect restorations, exposure of the gingival sulcus and control of hemorrhage or gingival fluid seepage are a prerequisite. For gingival displacement, cords impregnated with medicaments are widely used. I...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2002-07-01 00:00:00
abstract：:This study evaluated the five-year clinical performance of ceramic inlays and onlays made with two systems: sintered Duceram (Dentsply-Degussa) and pressable IPS Empress (Ivoclar Vivadent). Eighty-six restorations were placed by a single operator in 35 patients with a median age of 33 years. The restorations were ceme...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-039-C
更新日期：2013-01-01 00:00:00
abstract：:This in vitro study investigated the effects of a thin layer of flowable composite or compomer on microleakage occurring in Class II packable and nanofilled composite restorations that extend apical to the cemento-enamel junction (CEJ). The current study also investigated any differences in microleakage that occur bet...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/08-91
更新日期：2009-05-01 00:00:00
abstract：:Light Emitting Diode (LED) curing units are attractive to clinicians, because most are cordless and should create less heat within tooth structure. However, questions about polymerization efficacy have surrounded this technology. This research evaluated the adequacy of the depth of cure of pit & fissure sealants provi...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2005-11-01 00:00:00
abstract：:This study evaluated the effect of ascorbic acid, 500 mg every eight hours, on bleaching-induced tooth sensitivity. A triple-blind, parallel design, and placebo-controlled randomized clinical trial was conducted on 39 adults. The pills (placebo or ascorbic acid) were administered three times per day for 48 hours; the ...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/12-483-C
更新日期：2014-03-01 00:00:00
abstract：OBJECTIVE:This study evaluated the importance of enamel at the cervical margin for support and retention of a class II composite restoration in relation to fracture strength, fracture mode, and leakage. METHODS:Sixty-five newly extracted teeth were randomly divided into five groups. Within each group, standardized cla...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/10-126-L
更新日期：2011-03-01 00:00:00
abstract：:The aim of this investigation was to verify the influence of 3 light curing units on the degree of conversion, using different irradiation conditions: 1) manufacturers' recommended times of photo-activation, 2) standardizing total energy density among the units and 3) standardizing energy density at the 450-490 nm wav...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-81
更新日期：2006-07-01 00:00:00
abstract：:Ceramic root-canal posts offer potential advantages over other types with respect to aesthetics and biocompatibility. Any post must be sufficiently rigid and retentive to withstand functional forces. Ceraposts (1.2 mm coronal diameter, ceramic, tapering, smooth posts) and Paraposts (1.25 mm, stainless-steel, parallel,...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2000-05-01 00:00:00
abstract：:This study compared the surface finish of eight different types of aesthetic restorative materials. The materials included resin-modified (Fuji II LC [FL], GC) and highly viscous (Fuji IX GP Fast [FN], GC) glass ionomer cements, a compomer (F2000 [FT], 3M-ESPE), minifilled (Z100 [ZO], 3M-ESPE) and microfilled (A110 [A...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2004-01-01 00:00:00
abstract：:This study investigated the microleakage associated with the repair of non-carious amalgam defects using flowable resin composite. Occlusal amalgam preparations were accomplished on 36 non-carious mandibular molars. A standardized 40-micron marginal defect was made by condensing amalgam against a mylar matrix strip. S...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
abstract：:This study investigated the effect of a crown-lengthening ferrule on the fracture resistance of endodontically-treated teeth restored with two dowel-core systems. Thirty-two extracted mandibular first premolars were sectioned perpendicular to the long axis at a point 1.0 mm occlusal to the buccal cementoenamel junctio...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/06-169
更新日期：2007-11-01 00:00:00
abstract：:The aims of this study were to investigate 1) the influence of cleansing methods after saliva contamination and 2) aging conditions (thermocycling and water storage) on zirconia shear bond strength (SBS) with a resin cement. One hundred and eighty zirconia specimens were sandblasted with 50 μm aluminum oxide particles...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/13-323-L
更新日期：2015-03-01 00:00:00
abstract：:This study investigated the effect of conventional and acidified casein phosphopeptide-amorphous calcium phosphate-containing crèmes (CPP-ACP and ACPP-ACP) on dentin permeability (DP) before and after acid challenge, using a fluid-flow measuring device and scanning electron microscopic (SEM) examination. Fifty dentin ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/17-382-L
更新日期：2019-09-01 00:00:00
abstract：:The authors describe a minimally invasive procedure for occlusal rehabilitation in a young patient presenting with mild mandibular prognathism and loss of occlusal vertical dimension caused by dental erosion from chronic gastroesophageal reflux. ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/09-110T
更新日期：2010-01-01 00:00:00
