Abstract：
UNLABELLED:This study evaluated the microtensile bond strength (μ-TBS) of low-shrinkage composites with their corresponding adhesive systems, Filtek Silorane/Silorane adhesive (SIL, 3M ESPE AG, Seefeld, Germany) and Aelite LS/One-Step Plus (AL, BISCO Inc, Schaumburg, IL, USA) in cavities with different C-factors. Filtek Z250/Adper Single Bond Plus (Z, 3M ESPE, St Paul, MN, USA) was used as a control. METHOD:Standardized Class I cavities were prepared in extracted human molars after removing occlusal enamel. Cavities were assigned into six different C-factors by applying nail polish to four walls, three walls, two walls adjacent to each other, two walls opposite to each other, one wall, or no walls. Resin composites with their corresponding adhesive systems were applied according to manufacturer instructions. Specimens were sectioned to obtain four rectangular beams from the center of the restorations and μ-TBS was measured. Data were analyzed by Weibull survival analysis. Shrinkage stresses of the resin composites were determined after 30 minutes from the start of light-curing using a tensometer testing machine. Flexure elastic modulus was determined using standard procedures, in accordance with ISO 4049. Data for shrinkage stress and elastic modulus were analyzed by one-way analysis of variance followed by a Tukey multiple-comparisons test (p<0.05). RESULTS:μ-TBS of both SIL and AL were not affected by different C-factors; however, the bond strength of Z decreased significantly when the C-factor increased. Shrinkage stress results were 0.94 ± 0.1, 1.79 ± 0.18, and 2.14 ± 0.23 MPa for SIL, AL, and Z, respectively. The flexural modulus of both the SIL and the AL was significantly lower than that of Z. CONCLUSIONS:Increasing C-factor did not negatively affect the bond strength of low-shrinkage composites.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
El-Sahn NA,El-Kassas DW,El-Damanhoury HM,Fahmy OM,Gomaa H,Platt JAdoi
10.2341/10-105-Lsubject
Has Abstractpub_date
2011-05-01 00:00:00pages
281-92issue
3eissn
0361-7734issn
1559-2863journal_volume
36pub_type
杂志文章,随机对照试验abstract：OBJECTIVE:The aim of this study was to present a case report of a patient affected by amelogenesis imperfecta showing a possible minimal and conservative adhesive treatment approach. CLINICAL PROCEDURE:A treatment philosophy of amelogenesis imperfecta is illustrated by means of a case report of a 14-year-old boy who c...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-437-S
更新日期：2013-05-01 00:00:00
abstract：OBJECTIVES:To evaluate the effect of application protocol in resin-enamel microshear bond strength (μSBS), in situ degree of conversion, and etching pattern of three universal adhesive systems. METHODS AND MATERIALS:Sixty-three extracted third molars were sectioned in four parts (buccal, lingual, and proximals) and di...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-213-L
更新日期：2016-09-01 00:00:00
abstract：:Amalgapins are susceptible to early fracture during matrix removal and carving. The purpose of this study was to examine the early fracture resistance of amalgapin-retained restorations using a spherical amalgam alloy, an admixed amalgam alloy, a combination of admixed alloy over the spherical alloy, and a recently in...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1998-03-01 00:00:00
abstract：:This study was designed to compare strength, elastic modulus (stiffness), and hardness for five composite resin materials that are used for laboratory-fabricated posterior composite restorations. Ten specimens of each material were processed according to the manufacturer's instructions. Statistical analysis indicated ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1994-11-01 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：:Detailed and accurate impressions are made when the oral environment is dry during the impression process. Maintaining a dry field on medically, physically, or emotionally compromised patients can be very challenging. If not achieved, it may compromise dental care and accurate outcomes. This article describes a techni...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-290-T
更新日期：2014-01-01 00:00:00
abstract：:This study evaluated the shear bond strength of repairs made with a composite (Herculite/Kerr) when two different surface treatment methods and two new generation bond materials were used. The bonding surfaces were prepared by sanding with 500-grit aluminum oxide sandpaper or air abrading with 25-micron aluminum oxide...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2003-03-01 00:00:00
abstract：OBJECTIVES::To evaluate the effect of a remineralizing gel combining fluoride and calcium silicate/phosphate or a sodium fluoride gel on bleached enamel microhardness, color, and wear susceptibility. METHODS AND MATERIALS::Two hundred forty bovine enamel-dentin samples were prepared. Baseline analysis of Knoop microha...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/17-150-L
更新日期：2019-01-01 00:00:00
abstract：:The tested hypotheses of this study were that dentin enamel bonding agents (DBAs) proposed for compomers create a hybrid layer (HL) that seals the margins of Class V restorations and HL is free from voids or gaps on both enamel and dentin margins. For purposes of this study, Class V restorations (n = 70) were made in ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2004-01-01 00:00:00
abstract：:The replacement of a restoration is one of the most common procedures in dentistry. However, the criteria for such intervention, excluding catastrophic failure and persistent discomfort and pain, continue to be the subject of considerable debate. The decision-making process remains subjective on the part of the treati...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-058-O
更新日期：2016-09-01 00:00:00
abstract：:The present in vitro study concerns determination of the pre-cementation gap width of all-ceramic crowns made using an in-office digital-impression technique and subsequent computer-aided design/computer-aided manufacturing (CAD/CAM) production. Two chairside video camera systems were used: the Lava Oral scanner and C...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-309-L
更新日期：2014-05-01 00:00:00
abstract：:Dentin bridging of 150 mechanically exposed monkey pulps to two adhesive resins [BondWell LC (BW); Clearfil Liner Bond II (LB)] and a calcium hydroxide cement [Dycal (DY)] were histopathologically evaluated at 3, 7, 14, 30, and 60 days after operation (n = 10). The dentin bridge structure was three-dimensionally recon...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2000-05-01 00:00:00
abstract：:The critical point of the clinical procedure of direct splinting is the placement of the fiber-reinforced strip, which has to be well adapted to tooth surfaces. This article describes the use of aluminum foil to cover and protect the fiber-reinforced strip from light polymerization during the direct splinting techniqu...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-68
更新日期：2006-05-01 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：:The current study investigated the influence of carbamide peroxide on the flexural strength of tooth-colored restorative materials at two environmental temperatures. Seven restorative materials were used, including four resin composites (Filtek Z350, Filtek Z250, Synergy Flow and Filtek P60), a polyacid-modified compo...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/09-139-L
更新日期：2010-05-01 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：:Of the many factors under their control, clinicians can manipulate light-exposure duration but must deal with a set intensity of light emitted from the dental curing unit. This research investigates the interdependence of exposure duration and source intensity on resin cure at various depths within a simulated light-c...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:The DIAGNOdent, a device used in caries detection, uses a laser to excite fluorescence from pigments in carious tooth structure. In clinical use assessing occlusal surfaces, distance and tooth structure may separate the instrument's tip from the fluorescent source.The aim of this in vitro study was to examine the effe...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-179-L
更新日期：2012-03-01 00:00:00
abstract：:The development of adhesive agents for bonding composite to dentin has rapidly evolved in recent years. It is postulated that dentin bond strengths in the range of 17 MPa are sufficient to resist the polymerization shrinkage of composite resins. The purpose of this study was to evaluate the shear bond strengths of the...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1995-03-01 00:00:00
abstract：OBJECTIVES:To evaluate the clinical behavior of one-piece complete-coverage crowns and fixed partial dentures (FPDs) on teeth with vertical preparation without finish line biologically oriented preparation technique (BOPT). METHODS AND MATERIALS:This prospective study included 52 patients requiring treatment with rest...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/17-124-C
更新日期：2018-09-01 00:00:00
abstract：:This study evaluated the effects of two in-office bleaching agents (Beyond and Opalescence Boost) with different pH on the structure and mechanical properties of human enamel in vitro and in situ. One hundred and eight enamel slabs were obtained from freshly extracted premolars. The specimens were randomly distributed...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/11-173-L
更新日期：2013-01-01 00:00:00
abstract：CLINICAL RELEVANCE:When a resin nanoceramic inlay is cemented using self-adhesive cement, a universal dentin adhesive can be applied to the prepared cavity. The application of the adhesive before self-adhesive cement placement provides similar or better interfacial adaptation than without the adhesive. SUMMARY:Purpose...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-141-L
更新日期：2020-11-01 00:00:00
abstract：CLINICAL RELEVANCE:Pigments in tooth structures affect the diffusion of H2O2 through enamel and dentin. The bleaching methodology can be impacted. SUMMARY:Objective: The aim of this study was to evaluate the influence of the presence of pigments in tooth structures on the trans-enamel and trans-dentin diffusion of hyd...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-013-L
更新日期：2020-11-01 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 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：:The purpose of this study was to determine if the actual concentration of bleaching agents available in four different countries were the same as the label indicated and within the recommendations of the International Standard on Tooth Whitening. The method recommended for assaying peroxide by the United States Pharma...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-367-L
更新日期：2013-05-01 00:00:00
abstract：OBJECTIVES:This study aimed to assess the retention of metal copings luted to uremic teeth with five different luting agents. METHODS:A total of 35 sound natural molars was collected from uremic patients and randomly assigned into five groups (n=7). The teeth were prepared for metal copings using diamond tips and wate...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/12-523-LR2
更新日期：2014-05-01 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：: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：:Different approaches have been proposed to improve the adaptation of Class II restorations, including applying low-elasticity modulus base liners. This in vitro fatigue test (or study) evaluated the influence of the compomer base-lining configuration on restoration adaptation. Direct Class II MOD box-shaped composite ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2002-09-01 00:00:00
