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 between restorations light-cured using a light-emitting diode (LED) and a quartz tungsten halogen (QTH) light-curing unit. Standardized Class II "slot" cavity preparations were prepared on the mesial and distal surfaces of 72 extracted, unrestored, non-carious premolars (n = 144). The gingival margins were placed 1 mm apical to the CEJ. The teeth were divided into two groups (n = 72) and restored with a "packable composite" (Filtek P60) or a "nano-filled composite" (Universal Filtek Supreme XT) with or without flowable composite (Flowable Filtek Supreme XT) or flowable composite (Dyract Flow) as gingival liners placed with thicknesses of 1.0 mm. Each increment was cured for 20 seconds before adding the next. One-half of the samples in each group was cured with QTH (Coltolux 75) and the other half with LED (Coltolux LED) LCUs. After a two-week incubation period at 37 degrees C, the specimens were thermocycled (5 degrees C-55 degrees C x 1500), immersed in 0.5% basic fuchsin dye for 24 hours, sectioned and the microleakage was then evaluated at the gingival margin by two examiners using a 0-3 score scale. Within the current study, when flowable liners were used, both the packable (Filtek P60) and nanofilled (Filtek Supreme XT Universal Restorative) composite materials had significantly less microleakage than when flowable liners were not used (p < 0.05). Both flowable liners (Flowable Filtek Supreme XT and Dyract Flow) resulted in a significant reduction of the microleakage occurring under both types of composite materials at the gingival floors ( p < 0.05), but there was no significant difference between them. The choice of light curing technology (LED vs QTH) had no significant effect on the amount of microleakage observed.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Sadeghi M,Lynch CDdoi
10.2341/08-91subject
Has Abstractpub_date
2009-05-01 00:00:00pages
306-11issue
3eissn
0361-7734issn
1559-2863journal_volume
34pub_type
杂志文章,随机对照试验abstract:OBJECTIVE:The aim of the study was to compare in Class V composite restorations marginal leakage measurements obtained with microcomputed tomography (micro-CT) and scanning electron microscopy (SEM) observations. METHODS:Class V cavities were prepared on 10 human molars and restored using Optibond FL (Kerr, Orange, CA...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/14-022-L
更新日期:2015-07-01 00:00:00
abstract::The present study investigated the effect of three high-viscosity bulk-fill resin-based composite materials on cuspal deflection in natural teeth. Thirty-two sound maxillary premolar teeth with large slot mesio-occlusal-distal cavities were distributed into four groups (n=8). Three groups were restored with bulk-fill ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-072-L
更新日期:2018-01-01 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 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...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/14-364-L
更新日期:2016-01-01 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::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
abstract::Coronal fractures of posterior teeth are not rare in clinical practice. Most of the time they constitute a restorational problem for the clinician, since they usually end below the free gingival crest. Two hundred coronal fractures of posterior teeth were examined in this study, with respect to several factors. Some o...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::To protect glass-ionomer cement from moisture contamination and dehydration during initial setting, immediate application of a surface coating agent is recommended. This study compared the effect of various surface coatings on F release from glass-ionomer cement. Twenty glass-ionomer cement (Ketac Fil Aplicap) disks (...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1994-09-01 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 compared the amount of artificial plaque synthesized in vitro by Streptococcus sobrinus on various dental materials using radioisotopes. In particular, plaque-retaining capacities of new types of ceramics were the focus of this study. Specimens were fabricated from the following materials (one amalgam alloy...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2001-07-01 00:00:00
abstract::This study investigated the influence of curing lights and modes on the cross-link density of dental composites. Four LED/halogen curing lights (LED-Elipar Freelight [FL], 3M-ESPE and GC e-light [EL], GC; high intensity halogen-Elipar Trilight [TL], 3M-ESPE; very high intensity halogen-Astralis 10 [AS], Ivoclar Vivade...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2004-07-01 00:00:00
abstract::A fundamental issue of restorative treatment is assessing the different conditions of cases not only from tooth-to-tooth but also from the activity of each caries lesion and the size of the cavity. In addition, restorative treatment is sometimes carried out for prosthetic and cosmetic purposes and involves cutting sou...
journal_title:Operative dentistry
pub_type:
doi:
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate the clinical performance and to validate the Lesion Activity Assessment (LAA) in conjunction with the International Caries Detection and Assessment System (ICDAS) for occlusal caries diagnosis in permanent teeth. METHODS:Patients with erupted or partially erupted thir...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/13-332-C
更新日期:2015-09-01 00:00:00
abstract::This study compared the viscoelastic properties of restorative and flowable bulk-fill resin-based composites (RBCs) with their conventional counterparts and evaluated the impact of aqueous solutions on viscoelastic properties. The materials examined included three conventional RBCs (Filtek Z350, Tetric N Ceram, and Be...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/19-005-L
更新日期:2020-03-01 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:PURPOSE:This study evaluated the amount of residual yellow in cured resin composites when polymerizing with either a quartz-tungsten-halogen (QTH) or blue light-emitting diode (LED). MATERIAL AND METHODS:Twelve shades (bleaching to conventional shades) of microfill, hybrid and microhybrid resin composite specimens (n ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-129
更新日期:2007-09-01 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::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:OBJECTIVES:The aim of this study was to quantify the internal void volume formation in commercially available, resin composites inserted using conventional or sonic insertion methods, and analyzed using three-dimensional (3D) micro-computed tomography (μCT). METHODS AND MATERIALS:Four resin composites were evaluated: ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-331-L
更新日期:2018-03-01 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 aim of this review was to compile recent evidence related to nanofilled resin composite materials regarding the properties and clinical performance. Special attention was given to mechanical properties, such as strength, hardness, abrasive wear, water sorption, and solubility. The clinical performance of nanocompo...
journal_title:Operative dentistry
pub_type: 杂志文章,评审
doi:10.2341/17-208-T
更新日期:2018-07-01 00:00:00
abstract::Four resin based materials (Compolute Aplicap, ESPE; Variolink Ultra, Vivadent; C&B Metabond, Parkell and Panavia 21, Kuraray), two carboxylate cements (Poly-F Plus, Dentsply DeTrey and Durelon Maxicap, ESPE), two glass-ionomer cements (Fuji I, GC and Ketac-Cem Aplicap, ESPE), one resin-modified glass ionomer cement (...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract::One hundred cervical caries-free, nonundercut lesions were restored in 13 patients of mean age 60.5 years, using Silux Plus or Estio LC resin composite bonded with Fuji Bond LC. Patients were recalled at 6 months and 1 year. A 1-year cumulative retention rate of 98% was recorded, while marginal staining was absent. ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1998-11-01 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::Bonding to enamel has been shown to provide reliable results, and thus conservative tooth preparations are key to the success of ceramic bonded restorations. The wax-up is the first diagnostic tool available to evaluate discrepancies between current and ideal tooth proportions. The clinician's diagnostic mock-up provi...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/19-051-T
更新日期:2020-05-01 00:00:00
abstract::Most manufacturers of dental adhesives have both a total-etch adhesive and a simplified self-etching adhesive available on the market. This study measured the enamel microtensile bond strengths of five pairs of enamel adhesives as a function of enamel roughness. The proximal surfaces of 25 extracted mandibular molars ...
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:2005-07-01 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::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::Under clinical conditions, the time needed for the proper light curing of luting composites or the multi-incremental buildup of a large restoration with halogen curing units is quite extensive. Due to the development of high power curing devices, such as argon lasers and plasma arc lights and, in order to decrease cur...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-79
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVES:This study evaluated the bond strength of luting systems for bonding glass fiber posts to root canal dentin. The hypothesis tested was that there are no differences in bond strength of glass fiber posts luted with different cement systems. METHODS:Forty bovine incisors were randomly assigned to five differe...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/11-035-L
更新日期:2012-01-01 00:00:00