Abstract：
:Light Emitting Diode (LED) curing units are attractive to clinicians, because most are cordless and should create less heat within tooth structure. However, questions about polymerization efficacy have surrounded this technology. This research evaluated the adequacy of the depth of cure of pit & fissure sealants provided by LED curing units. Optilux (OP) and Elipar Highlight (HL) high intensity halogen and Astralis 5 (A5) conventional halogen lights were used for comparison. The Light Emitting Diode (LED) curing units were Allegro (AL), LE Demetron I (DM), FreeLight (FL), UltraLume 2(UL), UltraLume 5 (UL5) and VersaLux (VX). Sealants used in the study were UltraSeal XT plus Clear (Uclr), Opaque (Uopq) and Teethmate F-1 Natural (Kclr) and Opaque (Kopq). Specimens were fabricated in a brass mold (2 mm thick x 6 mm diameter) and placed between two glass slides (n=5). Each specimen was cured from the top surface only. One hour after curing, four Knoop Hardness readings were made for each top and bottom surface at least 1 mm from the edge. The bottom to top (B/T) KHN ratio was calculated. Groups were fabricated with 20 and 40-second exposure times. In addition, a group using a 1 mm-thick mold was fabricated using an exposure time of 20 seconds. Differences between lights for each material at each testing condition were determined using one-way ANOVA and Student-Newman-Keuls Post-hoc test (alpha=0.05). There was no statistical difference between light curing units for Uclr cured in a 1-mm thickness for 20 seconds or cured in a 2 mm-thickness for 40 seconds. All other materials and conditions showed differences between light curing units. Both opaque materials showed significant variations in B/T KHN ratios dependent upon the light-curing unit.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Platt JA,Clark H,Moore BKkeywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
764-71issue
6eissn
0361-7734issn
1559-2863journal_volume
30pub_type
杂志文章abstract：:This in vitro study investigated the possible dehydration of dentin caused by bleaching agents. Furthermore, it tested whether protective dentin varnishes can maintain the physiological moisture of dentin during bleaching treatment. Fifty-five standardized dentin cylinders were prepared from freshly extracted bovine i...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-89
更新日期：2006-09-01 00:00:00
abstract：:The antibacterial effects of the dentin bonding systems Syntac, ProBOND, Gluma 3-Step, the resin-modified glass ionomers Photac-Fil, Fuji Lining LC, Fuji II LC, and the polyacid-modified composite resins VariGlass, Geristore, and Infinity were evaluated using the cariogenic bacteria S mutans, L salivarius, S sobrinus,...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1996-11-01 00:00:00
abstract：OBJECTIVE::Computer aided design-computer aided machining (CAD-CAM) ceramic crowns are replacing ceramo-metal ones due to newly developed mechanical properties and esthetics. To obtain knowledge about their interactions due to polishing and occlusal contacts with the opposing dental enamel specimen, including surface r...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/17-153-L
更新日期：2019-01-01 00:00:00
abstract：:This in vitro study measured cusp deflection associated with MOD resin composite restorations in maxillary premolars with different curing light modes. Soft-start polymerization may reduce cusp deflection by reducing polymerization shrinkage stress. Forty maxillary premolars were mounted in stone and slot MOD cavities...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：
更新日期：2005-11-01 00:00:00
abstract：:This study investigated the effectiveness of cure and post-gel shrinkage of three visible light-cured composite resins (In Ten-S [IT], Ivoclar Vivadent; Z100 [ZO], 3M-ESPE; Tetric Ceram [TC], Ivoclar Vivadent) when polymerized with a very high intensity (1296 +/- 2 mW/cm2) halogen light (Astralis 10, Ivoclar Vivadent)...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2003-07-01 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：:This in-vitro study compared the resistance of extensive amalgam restorations retained by either four Regular TMS Link Plus pins, four amalgapins, Amalgambond Plus, Amalgambond Plus with HPA, Scotchbond Multi-Purpose Plus, PQ Amalgam, Panavia F 2.0, All-Bond 2 or Resinomer. Ninety caries-free third molars were embedde...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/08-5
更新日期：2008-11-01 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：:This study evaluated the effect of two dentin disinfectants (Consepsis, Tubulicid), one aqueous HEMA solution (Aqua Prep), a combination of Aqua Prep and Tubulicid and an air abrasion treatment (50 microns aluminum oxide) on the shear bond strength (SBS) of two acetone-based single bottle adhesives (One Step and Prime...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2001-11-01 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：:Post-operative sensitivity (POS) may be observed in recently placed posterior composites. Evidence-based guidelines for the management of posterior composites with POS have yet to be determined. This study examined a retrospective analysis of the findings of a unique multi-center clinical trial to investigate the five...
journal_title：Operative dentistry
pub_type： 临床试验,杂志文章,多中心研究
doi：
更新日期：2003-11-01 00:00:00
abstract：:This study examined the effect of different light activation modes for light-cured resin-based composites on the shear bond strength to dentin of two one-bottle adhesives with differing acidity. In this experimental study, a flat middle dentin surface was prepared on 110 extracted sound molars using a 600-grit polish ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/08-048-L
更新日期：2009-09-01 00:00:00
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：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：: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：:Traumatic dental injuries usually occur among children and adolescents, with maxillary central incisors as the most often affected teeth. Complicated crown-root fractures are particularly challenging for esthetic and functional rehabilitation and often require a multidisciplinary approach. A 21-year-old male patient c...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-080-T
更新日期：2016-11-01 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：:The purpose of this study was to find out the degree to which eugenol-containing temporary cements or temporary filling materials affected shear bond strength of a dual-cure resin luting cement to acid-etched enamel. For this purpose 56 human caries-free third molars were embedded in acrylic resin and cross sectioned ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1998-03-01 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：: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：: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：: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：: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：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:Inadequately polymerized resin cements may negatively affect the clinical performance of cemented all-ceramic restorations. The purpose of this in vitro study was to evaluate the effect of ceramic thickness and shade on the microhardness of various light-cured (LC) and dual-cured (DC) resin cements. The amou...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-206-L
更新日期：2011-11-01 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：: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：: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 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：AIMS:To evaluate the effect of two composite restorative techniques (direct bulk fill vs indirect CAD/CAM) on the fracture resistance and mode of fracture of extended mesio-occlusal-distal (MOD) cavity preparations. METHODS:Fifty-one sound human mandibular third molars were divided into three groups (n=17). Extended b...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/18-013-L
更新日期：2019-05-01 00:00:00
