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 composites, two bulk-fill PRG RBCs, and three bulk-fill non-PRG RBCs were investigated. Block-shaped specimens of 2-mm and 4-mm thickness were cured with an irradiance of 700 mW/cm(2) for 20 seconds with a light-emitting diode curing light and eluted with culture medium at 37°C for 24 hours. L929 mouse fibroblasts were exposed to extracts at varying dilutions (1:1, 1:2, and 1:10) for 24 hours. Analyses were performed to assess cytotoxicity, phase contrast microscopy, and quantitative cell viability. Among the bulk-fill RBCs, extracts of PRG materials resulted in the lowest cell viability. At 4-mm thickness, undiluted extracts of bulk-fill non-PRG RBCs had significantly higher cell viability than the standard composites. Chemical composition, specimen thickness, and testing concentrations of extracts had significant effects on cell viability and morphology. Cytotoxic effects of composites on cell viability were parallel with cell morphologic changes. Not all bulk-fill RBCs demonstrated high cell viability (>70%) at 4-mm thickness despite manufacturers' recommendations of bulk placement and curing.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Toh WS,Yap AU,Lim SYdoi
10.2341/15-059-Lsubject
Has Abstractpub_date
2015-11-01 00:00:00pages
644-52issue
6eissn
0361-7734issn
1559-2863journal_volume
40pub_type
杂志文章abstract::This in vitro study compared the marginal and internal adaptation of bulk-filled Class I and cuspal coverage direct resin composite restorations filled with different types of adhesive restorative systems and different thicknesses of bonding agent. Seventy-two intact, caries-free, freshly extracted human molars were r...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/06-157
更新日期:2007-09-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate the effect of low-thickness ceramic laminate translucency on water sorption and solubility in resin luting agents. METHODS AND MATERIALS:Ceramic slides (15×0.7 mm) were generated using lithium disilicate (IPS e.max Press, Ivoclar-Vivadent, Schaan, Liechtenstein) that were ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/15-201-L
更新日期:2016-09-01 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: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::The study aimed to evaluate teaching trends and use of materials in direct posterior restorations during a 13-year period in an Israeli dental school. METHODS::Data registered in computerized files, relating to posterior restorations performed in the student clinic during the past 13 years (2004-2016), were...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-361-C
更新日期:2018-11-01 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
abstract:PURPOSE::The purpose of this study was to quantify the relative strength tolerance of 1-day and 30-day amalgam following saturation contamination with water, saliva, blood, and handpiece lubricant oil during condensation. METHODS AND MATERIALS::Valiant PhD XT amalgam was tested with 300 shear-strength (N=15) and 120 c...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-091-L
更新日期:2019-03-01 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::On occasion we receive manuscripts that we would like to publish, but do not have the page room to include in the print journal. For the full article, please go to www.jopdentonline.org or enter the provided address into your address bar. ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/1559-2863-43.3.335
更新日期:2018-05-01 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: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::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:OBJECTIVES:To evaluate the bond strength of adhesive luting agents applied to caries-affected dentin (CAD). METHODS:Thirty-six noncarious human third molars were abraded to expose an occlusal dentin surface. Caries lesions were induced in half of the samples using a microcosm biofilm model. Biofilm was cultivated unde...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/14-169-L
更新日期:2015-05-01 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::This article reports the case of a patient with bilateral hypodontia of the maxillary lateral incisors who was dissatisfied with the outcome of initial orthodontic treatment, highlighting the importance of a multidisciplinary interaction among Restorative Dentistry, Orthodontics, and Implantology to achieve satisfacto...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/11-167-T
更新日期:2012-09-01 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::Even though accuracy and inter-examiner variation assessments of borderline restorative items have been previously reported, no attempt has been made to replicate the effect of cumulative, sequential diagnostic and treatment planning decisions. This study assesses the cumulative effect of factors indicating restorativ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract:PURPOSE:To investigate the effect of different light exposure times, shades, and thicknesses on the depth of cure (DOC) of bulk fill composites. METHODS AND MATERIALS:Two bulk fill composites, Tetric EvoCeram Bulk Fill (TBF) and Sonic Fill (SF), and a conventional composite, Filtek Supreme Ultra (FSU), were evaluated....
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-057-L
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVES:To evaluate the efficacy of a new light-cured anesthetic gel for pain control in adults undergoing rubber dam isolation for the restorative treatment of noncarious cervical lesions (NCCLs). METHODS AND MATERIALS:This study was a randomized, split-mouth, triple-blind, controlled trial. The sample comprised 5...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/18-130-C
更新日期:2020-03-01 00:00:00
abstract::This study evaluated the effect of cyclic loading on the bond strength of Class II restorations using different composite materials. Class II preparations with gingival margins located in dentin were performed on the mesial surface of 80 bovine incisors. The teeth were randomly allocated to eight groups (n=10) accordi...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/07-65
更新日期:2008-03-01 00:00:00
abstract::This study tested the null hypothesis that there no difference between two-step and one-step self-etch adhesives in their compatibility with these composites. The microtensile bond strengths (microTBS) of two two-step systems (Clearfil SE Bond, Kuraray and Tyrian SPE/One-Step Plus, BISCO) were compared with two one-st...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the strengthening effect of resin composite, cured by a modified layering protocol, for teeth with simulated coronal fracture and weakened immature roots. METHODS:Fifty maxillary teeth were decoronated and their apices sectioned to standardize the length to 12 mm. Pr...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/12-525L
更新日期:2014-05-01 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::V-shaped cervical cavities prepared in monkey teeth were restored with several dentin bonding systems, and the in vivo resin-dentin interfacial structures were observed under the scanning electron microscope using an argon-ion etching technique. The hybrid layer could be clearly observed; its depth was dependent on th...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1995-09-01 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 objective of this study was to evaluate the effect of surface sealants and polishing delay time on a nanohybrid resin composite roughness and microhardness. Eighty disc specimens were made with a nanohybrid resin (Esthet-X HD, Dentsply). The specimens were divided into two groups (n=40) according to polishing time...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-048-L
更新日期:2018-07-01 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::A core foundation system is frequently used in endodontically treated teeth that suffer excessive loss of the coronal portion of their structure. The volumetric shrinkage of core foundation resins may create marginal gaps that influence the bonding ability and longevity of a restored tooth. Little is known about how a...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2005-09-01 00:00:00
abstract:OBJECTIVES:To evaluate and compare the fracture toughness of dental CAD/CAM materials of different material classes intended for in-office milling (glass ceramics, hybrid, resin composites) and the influence of aging on this property. METHODS AND MATERIALS:The fracture toughness (critical intensity factor, KIc) values...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-161-L
更新日期:2019-07-01 00:00:00