Abstract:
OBJECTIVE:This study evaluated the differences in enamel color change, surface hardness, elastic modulus, and surface roughness between treatments with four bleaching gels containing carbamide peroxide (two at 10% and one each at 35%, and 45%) and two bleaching gels containing hydrogen peroxide (two at 40%). METHODS:Enamel specimens were bleached and color changes were measured. Color change was calculated using either ΔE or the Bleaching Index (BI). Then, surface hardness, elastic modulus, and surface roughness of the enamel specimens were evaluated. All measurements were performed at baseline and directly after the first bleaching treatment for all carbamide peroxide- and hydrogen peroxide-containing bleaching gels. In addition, final measurements were made 24 hours after each of a total of 10 bleaching treatments for carbamide peroxide bleaching gels, and 1 week after each of a total of three bleaching treatments for hydrogen peroxide bleaching gels. RESULTS:After the last bleaching treatment, respective ΔE scores were 17.6 and 8.2 for the two 10% carbamide peroxide gels, 12.9 and 5.6 for the 45% and 35% carbamide peroxide gels, and 9.6 and 13.9 for the two 40% hydrogen peroxide gels. The respective BI scores were -2.0 and -2.0 for the two 10% carbamide peroxide gels, -3.5 and -1.5 for the 45% and 35% carbamide peroxide gels, and -2.0 and -3.0 for the two 40% hydrogen peroxide gels. Each bleaching gel treatment resulted in significant whitening; however, no significant difference was found among the gels after the last bleaching. Whitening occurred within the first bleaching treatments and did not increase significantly during the remaining treatments. Surface hardness significantly decreased after the last bleaching treatment, when 10% carbamide peroxide was used. Furthermore, significant changes in the elastic modulus or surface roughness occurred only after treatment with 10% carbamide peroxide. CONCLUSION:All six bleaching gels effectively bleached the enamel specimens independent of their concentration of peroxide. Gels with low peroxide concentration and longer contact time negatively affected the enamel surface.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Cvikl B,Lussi A,Moritz A,Flury Sdoi
10.2341/15-010-Lsubject
Has Abstractpub_date
2016-01-01 00:00:00pages
E39-47issue
1eissn
0361-7734issn
1559-2863journal_volume
41pub_type
杂志文章abstract::To evaluate the correlation between microtensile dentin bond strength (microTBS) and silver ion penetration, two total-etch 3-step and one self-etch 2-step system were investigated. OptiBond FL adhesive was applied to flat occlusal dentin on six non-carious human molars, and a resin composite "crown" was formed in 2 m...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2003-01-01 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:CLINICAL RELEVANCE:The use of laser light during bleaching will not reduce the incidence or severity of sensitivity and will not increase the degree of color change compared with nonlaser light sources. SUMMARY:Objective: To evaluate whether the use of laser during in-office bleaching promotes a reduction in dental se...
journal_title:Operative dentistry
pub_type: 杂志文章,meta分析
doi:10.2341/19-064-L
更新日期:2020-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to compare the in vivo diagnostic ability of a laser fluorescence system (DIAGNOdent, KaVo, Biberac, Germany) with that of visual inspection in the early detection of occlusal caries in newly erupted noncavitated first permanent molars among caries-active children. MATERIALS AND MET...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/10-309-C
更新日期:2011-07-01 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::Various core materials with different shades affect the final color of high-translucency monolithic zirconia restorations. The blue core shows the greatest color difference in final zirconia restorations followed by metal, A3 dentin-shade resin core, and white core. ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/19-238-L
更新日期:2020-12-21 00:00:00
abstract::The effect of interdental separation of a special separation ring and wooden wedge was investigated. In a split-mouth design, 27 patients were randomly assigned to one of two groups (W or S). In 11 patients, an interdental wooden wedge (Hawe-Neos) was placed (group W), and in 16 patients, a separation ring (Composi-Ti...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/06-73
更新日期:2007-05-01 00:00:00
abstract::This research investigated the effects of wet and dry conditions of phosphoric acid etched dentin on resin bonding and determined the optimum moisture condition for resin bonding using an ethanol-based one-bottle adhesive system. Bovine dentin surfaces were etched with 35% phosphoric acid and rinsed with water. Under ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2002-11-01 00:00:00
abstract::A technique of restoring Class II posterior restorations with resin-based composite and a pre-polymerized composite insert was presented. This technique is intended to aid the practitioner in obtaining tight, broad, proximal contacts without having to purchase special instruments or materials. This method is not time-...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2004-07-01 00:00:00
abstract::The purpose of this study was to determine if air thinning three dentin adhesives would affect bond strength to dentin. Ninety human molars were mounted in acrylic and the occlusal surfaces ground to expose a flat dentin surface. Thirty teeth were randomly assigned to one of the following dentin bonding agent/composit...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1995-07-01 00:00:00
abstract::This study compared the thickness of the hybrid layer formed using Scotchbond Multi-Purpose Plus, Single Bond 2, Prime & Bond 2.1 and Xeno III on a dentin surface prepared with a diamond bur in a high speed handpiece or prepared with an Er:YAG laser used with two parameters of pulse energy (200 and 400 mJ) and two par...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/07-84
更新日期:2008-05-01 00:00:00
abstract:OBJECTIVES:This study investigated cuspal deformation in teeth restored with different types of adhesive materials with and without a base. METHODS:Mesio-occluso-distal slot cavities of moderately large dimension were prepared on extracted maxillary premolars (n=24). Teeth were assigned to one of four groups and resto...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/14-331-L
更新日期:2016-03-01 00:00:00
abstract::In some patients with labial white stains involving the enamel and dentin, bleaching associated with a restorative procedure using composites may be an appropriate treatment alternative. Although bleaching makes the teeth and the stain whiter, the staining is less evident and easier to restore. Restorative procedures ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/12-284-T
更新日期:2013-07-01 00:00:00
abstract:PURPOSE:This study evaluated the effect of thermocycling on the microtensile bond strength of four adhesive luting agents to GN-I CAD-CAM ceramic. The hypothesis tested was that thermocycling did not affect bonding effectiveness, irrespective of the luting agents used. MATERIALS AND METHODS:Ceramic specimens of two di...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-106
更新日期:2007-07-01 00:00:00
abstract::The present clinical case report describes the clinical steps of enamel microabrasion associated with dental bleaching to restore severely-pitted fluorosed teeth. The process of removing the fluorotic superficial stains started by using macroabrasion with a water-cooled fine tapered 3195 FF diamond bur. Rubber dam iso...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-116-T
更新日期:2019-11-01 00:00:00
abstract::The available and proposed methods for determining the in vivo occlusal wear values of classes 1 and 2 restorations made of resinfilled composite materials are critically reviewed. A methodology to be used to address the fundamental question of the link between the wear of the in vivo restorations and the relevant mec...
journal_title:Operative dentistry
pub_type: 杂志文章,评审
doi:
更新日期:1991-03-01 00:00:00
abstract::This in vitro study assessed the effect of a step-cure light curing method on resin/dentin bond strength on the buccal wall of Class I cavities in human teeth. Occlusal enamel was removed to expose a flat dentin surface. Twenty four box-shaped cavities (C-factor = 4.5) were prepared in dentin. Prime&Bond 2.1 was appli...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/05-37
更新日期:2006-05-01 00:00:00
abstract::This study determined the degree of conversion of two LED (light-emitting diodes) (Elipar FreeLight [FL], 3M ESPE; GC e-Light [EL], GC), a high intensity (Elipar TriLight [TL], 3M ESPE) and a very high intensity (Astralis 10 [AS], Ivoclar Vivadent) halogen light. The degree of conversion of these lights was compared t...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2004-09-01 00:00:00
abstract::The bulk-filling of deep, wide dental cavities is faster and easier than traditional incremental restoration. However, the extent of cure at the bottom of the restoration should be carefully examined in combination with the polymerization contraction and gap formation that occur during the restorative procedure. The a...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/13-324-L
更新日期:2015-03-01 00:00:00
abstract::This case report illustrates how to restore severely compromised teeth with direct composite restorations. The size of the restorations presented is often considered by dentists as being a contraindication for direct composites. Hence, the technique is explained step by step, addressing the crucial points. ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/15-001-T
更新日期:2016-09-01 00:00:00
abstract:OBJECTIVES:The aim of this investigation was to test the tensile bond strength (TBS) between different computer-aided-design/manufacturing (CAD/CAM) ceramics after conditioning using different universal adhesive systems and resin composite cement. METHODS AND MATERIALS:Substrates of four CAD/CAM ceramics-1) VITABLOCS ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-017-L
更新日期:2019-07-01 00:00:00
abstract:OBJECTIVES:To evaluate the beam profile and the spectral output of monowave and polywave light-emitting diodes (LEDs) and their influence on the degree of conversion (DC) of bulk fill composites. METHODS:A monowave LED (Smartlite Focus, Dentsply) and a polywave LED (Valo Cordless, Ultradent) were characterized using a...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-164-L
更新日期:2017-07-01 00:00:00
abstract::Hard tissue modification by means of laser irradiation is becoming popular in dentistry, since it promotes assorted responses between the tooth and the restorative material. Some studies on the bond strength of adhesive systems to Nd:YAG irradiated teeth have shown distinctive behaviors when irradiation was applied be...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/05-110
更新日期:2006-09-01 00:00:00
abstract:PURPOSE:This prospective long-term clinical trial evaluated and compared the three-year clinical performance of an ormocer, a nanofilled, and a nanoceramic resin composite with that of a microhybrid composite placed in Class I and Class II cavities. METHODS:Forty patients, each with four Class I and II restorations un...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/12-313-C
更新日期:2014-01-01 00:00:00
abstract::Provisional restorations of full crown preparations may permit more microleakage of bacteria and their products than the final castings do. However, most investigations of the sealing qualities of cemented castings have reported that they too permit dye leakage. One approach to the problem is to seal the dentin with d...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1992-01-01 00:00:00
abstract:PURPOSE:The present study aimed to investigate a novel adhesive system containing 0.2% chlorhexidine digluconate (CHX) for its ability to improve the stability of the adhesive interface compared with the use of 2% CHX as a therapeutic primer. Furthermore, the study aimed to confirm the inhibitory properties of these CH...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/12-239-L
更新日期:2013-11-01 00:00:00
abstract:OBJECTIVE:This clinical study aimed to assess the efficacies of mineral trioxide aggregate (MTA) and calcium hydroxide [Ca(OH)2] in the treatment of deep carious lesions by the direct complete caries removal technique. METHODS AND MATERIALS:A total of 100 permanent molar/premolar teeth were capped with either Ca(OH)2 ...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/16-110-C
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVES:To evaluate the effect of different surface treatments on the bond strength to a composite and a polymer-infiltrated ceramic CAD/CAM block after six-month artificial aging. METHODS AND MATERIALS:Two types of CAD/CAM blocks (Cerasmart, GC; Enamic, Vita Zahnfabrik) were cut in slabs of 4-mm thickness, divided...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/15-263-L
更新日期:2017-01-01 00:00:00
abstract::A literature review was conducted on adhesive Class I and II restorations and nondestructive in vitro tests using the PubMed/Medline database for the 1995-2010 period. The first part of this review has presented and critically appraised selected literature dealing with the quality and in vitro behavior of adhesive Cla...
journal_title:Operative dentistry
pub_type: 杂志文章,评审
doi:10.2341/12-020B-LIT
更新日期:2013-09-01 00:00:00
abstract::The role of silanes in the bonding of resin luting agents to glass-fiber posts (GFPs) is a controversial topic, and the question still remains whether post silanization is able to improve the retention of GFPs luted into root canals. Thus, this study was designed to determine whether evidence exists to justify silaniz...
journal_title:Operative dentistry
pub_type: 杂志文章,meta分析
doi:10.2341/14-330-O
更新日期:2015-11-01 00:00:00