Abstract：
:This in vitro study investigated the correlation between factors related to cavosurface marginal adaptation and microleakage in Class II cavities restored with a light- or chemical-activated resin composite. Standardized cavities were prepared in 40 molars that were randomly divided between both materials. Each of the groups was, in turn, divided, so that the restorations were placed by incremental and bulk techniques. The resultant four groups (n = 10), each with material/technique variations, had their marginal gaps measured by environmental scanning electron microscopy at randomly selected facial and lingual points of the proximal box of each restoration. After sectioning the teeth, interfacial dye penetration was assessed by light stereomicroscopy according to an ordinal scale at the same locations as for the marginal gaps. In a general linear model with microleakage as a dependent variable, no correlation between marginal gap size and microleakage was found (p = 0.802), although the interaction of the material and placement technique (p = 0.028) and material alone (p = 0.063) influenced microleakage. The model explained 63% of the variation in microleakage. It was concluded that, irrespective of the possible role of marginal gap in the occurrence of microleakage, the choice of material and placement technique are important determining factors in microleakage.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Idriss S,Abduljabbar T,Habib C,Omar Rdoi
10.2341/06-16subject
Has Abstractpub_date
2007-01-01 00:00:00pages
60-6issue
1eissn
0361-7734issn
1559-2863journal_volume
32pub_type
杂志文章,随机对照试验abstract：:A study was conducted to compare the shear bond strength of a glass-ionomer cement and glass-ionomer base to coronal and radicular dentin. Two different glass ionomers were bonded to paired coronal and radicular human dentin surfaces that had received no surface treatment or had been treated passively for 20 seconds w...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1994-07-01 00:00:00
abstract：:This study determined the effect of bleaching agents on the fracture toughness of composite materials. Four nanofilled resin composites were evaluated: Filtek Supreme Plus, Tetric EvoCeram, Premise and Esthet-X. Four concentrations of bleaching agents were tested: Opalescence PF 10%, 20%, 35% and 45%. Fifty specimens ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/08-120-L
更新日期：2009-11-01 00:00:00
abstract：:The molar proximal half-crown cast gold restoration may be an ideal choice for the conservative treatment of teeth with only one compromised proximal aspect. ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-T1
更新日期：2010-03-01 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：:Minimally invasive flowable composite Class I restorations are widely used. However, flowable composites are characterized by low filler contents, modified resin formulations, low moduli of elasticity, low viscosity, generally poor mechanical properties, and decreased long-term stability. The purpose of this study was...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-106-L
更新日期：2012-05-01 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：OBJECTIVE:To evaluate the effect of mechanical loading on the microtensile bond strength (MTBS) of five adhesive systems to dentin. METHODS:Flat dentin surfaces from human molars were divided into five groups and bonded with total-etch self-priming adhesives (Single Bond, Prime&Bond NT and Prime&Bond XP), two-step sel...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/04-161
更新日期：2006-01-01 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 in vitro study evaluated microleakage in Class II cavities restored with dental composite and varying light-curing units and the temperature of the composite when subjected to a thermocycling test. Ninety cavities were prepared on the proximal surfaces of bovine teeth and randomly divided according to the light-c...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-226-LR1
更新日期：2011-01-01 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：PURPOSE:To investigate the effect of different light-curing units and depths on the degree of conversion (DC) through Fourier transform infrared spectroscopy (FTIR) and Knoop Hardness Number (KHN) of a silorane-based composite resin (Filtek LS, 3M ESPE, St Paul, MN, USA) (LS). MATERIALS AND METHODS:LS specimens mounte...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-479
更新日期：2014-05-01 00:00:00
abstract：:The purpose of this study was to evaluate the 1-year results of the dentin bond (DBS)/viscous resin liner combinations Amalgambond Plus, Tenure/Panavia, Syntac/Dual Cem, and All-Bond 2/Liner F in reducing microleakage in class 5 cavity preparations restored with an admixed or a spherical amalgam alloy and to compare t...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1998-01-01 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：: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：OBJECTIVE:This in vitro study evaluated the effect of polishing with different polishing systems on the surface roughness and gloss of commercial composites. METHODS:One hundred disk-shaped specimens (10 mm in diameter × 2 mm thick) were made with Filtek P-90, Filtek Z350 XT, Opallis, and Grandio. The specimens were m...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/14-014L
更新日期：2015-07-01 00:00:00
abstract：:This study determined the relationship between marginal adaptation to dentin cavity preparations, tensile bond strength of the restorations, and mechanical properties of the composites. Contraction gaps, tensile bond strengths, flexural strengths, and Young's modulus of eight commercial resin composites were determine...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1999-11-01 00:00:00
abstract：:This study evaluated the effect of different chairside polishing systems on the surface roughness and topography of monolithic zirconia. Thirty-five monolithic zirconia specimens (Lava PLUS, 3M ESPE) were fabricated and divided into five groups of seven and polished with the following: Group 1 (WZ)-Dura white stone fo...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-064-L
更新日期：2016-07-01 00:00:00
abstract：:This study compares volumetric changes and rates of shrinkage during different stages of polymerization of dental resin composites and compomers exposed to the same total energy by using two different combinations of power density and exposure duration. A hybrid composite and its equivalent flowable and a compomer and...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2003-09-01 00:00:00
abstract：:The reasons for placement and replacement and the longevity of amalgam restorations were recorded by 62 Italian private practitioners. The survey compiled 1935 amalgam restorations inserted due to primary caries (59%) and failed restorations (41%). The clinical diagnosis of secondary caries constituted 59% of failures...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1992-03-01 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：:One hundred non-carious, non-undercut cervical lesions were restored with Silux Plus or Estio LC and bonded with Fuji Bond LC. The restorations were evaluated yearly for retention and marginal discoloration. After five years, the overall retention rate was 96%. Of the 41 restorations examined at five years, five had c...
journal_title：Operative dentistry
pub_type： 临床试验,杂志文章
doi：
更新日期：2002-09-01 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：:For many years, operative dentistry has been using regenerative approaches to treat dental disease. The use of calcium hydroxide to stimulate reparative or reactionary dentin is clearly an example of such a therapeutic strategy. The advent of tissue engineering is allowing dentistry to move forward in the use of regen...
journal_title：Operative dentistry
pub_type： 杂志文章,评审
doi：10.2341/06-000
更新日期：2006-11-01 00:00:00
abstract：:In vitro studies to assess bond strength between resins and ceramics have used surfaces that have been ground flat to ensure standardization; however, in patients, ceramic surfaces are irregular. The effect of a polished and unpolished ceramic on bond strength needs to be investigated. Sixty ceramic specimens (20×5×2 ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-009-L
更新日期：2011-09-01 00:00:00
abstract：:This investigation evaluated the stabilizing effect of glass fiber reinforced posts (FRP) luted with self-adhesive universal cement on the fracture resistance of excessively flared endodontically treated teeth (ETT). Values were compared to teeth with no ferrule, 2 mm ferrule and resin cement for luting with 2 mm ferr...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-142
更新日期：2006-11-01 00:00:00
abstract：:Dental fluorosis is a developmental disturbance of enamel caused by excessive fluoride on ameloblasts during enamel formation. Patients often present to the dentist with a main goal of improving their esthetic appearance. This case report describes a minimally invasive technique for treating a severe case of enamel fl...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-238-S
更新日期：2013-07-01 00:00:00
abstract：:Standardized class 4 cavities were prepared in bovine incisors and restored with a microfilled composite resin. The composite restorations were retained either by acid etching technique (AET) alone or by acid etching technique in combination with a self-threading retentive pin. Pins covered with a bonding/opaquer coat...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:This study evaluated the biocompatibility of contemporary bulk-fill resin-based composites (RBCs) including PRG (pre-reacted glass ionomer) materials based on the International Organization for Standardization 10993. In addition, the effect of composite thickness on cytotoxicity was also assessed. Two standard composi...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-059-L
更新日期：2015-11-01 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：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
