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 mounted in a particular designed matrix were photoactivated by three light-cure units (LCUs) at depths of 2, 3, 4, and 5 mm. The DC was determined in a FTIR spectrometer with an attenuated total reflectance accessory. The KHN was measured in an automatic microhardness tester. The results were analyzed using the Friedman and Spearman statistical tests (α=0.05). RESULTS:There was no effect of LCUs on the DC (p=0.472) or KHN (p=0.174) for all of the studied depths. The highest DC and KHN means were found at 2-mm depth, which were not statistically different from 3-mm depth, but were higher than 4-mm and 5-mm depths (p=0.007). Spearman analysis found a positive linear correlation between the variables KHN and DC (r=0.858, p<0.000). CONCLUSIONS:The LCUs' effect was not verified. Values of DC and KHN for LS decreased with increasing depth. The highest values for both DC and KHN were obtained at depths of 2-3 mm.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Torres SA,Silva GC,Maria DA,Campos WR,Magalhães CS,Moreira ANdoi
10.2341/12-479subject
Has Abstractpub_date
2014-05-01 00:00:00pages
E137-46issue
3eissn
0361-7734issn
1559-2863journal_volume
39pub_type
杂志文章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：: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：:A technique of restoring Class II posterior restorations with resin-based composite and a pre-polymerized composite insert was presented. This technique is intended to aid the practitioner in obtaining tight, broad, proximal contacts without having to purchase special instruments or materials. This method is not time-...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2004-07-01 00:00:00
abstract：:This study compared the slice method of measuring microleakage to the whole-wall method. Forty-eight Class V direct metal restorations were placed in the buccal and lingual surfaces of 24 human molars. Following thermocycling and storage in 2% methylene blue stain for 12 hours, the teeth were sectioned and the restora...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2002-11-01 00:00:00
abstract：OBJECTIVES:This study investigated cuspal deformation in teeth restored with different types of adhesive materials with and without a base. METHODS:Mesio-occluso-distal slot cavities of moderately large dimension were prepared on extracted maxillary premolars (n=24). Teeth were assigned to one of four groups and resto...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/14-331-L
更新日期：2016-03-01 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：10.2341/1559-2863-43.5.561
更新日期：2018-09-01 00:00:00
abstract：:This article outlines an atraumatic isolation approach and a conservative instrumentation sequence, followed by use of a highly viscous, rapid-setting, capsulated glass ionomer cement to manage a difficult deep proximal-cervical Class V lesion. ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2004-05-01 00:00:00
abstract：:The purpose of this study was to compare the long-term survivals of two low-copper and three high-copper amalgam alloys, and to analyze four clinical factors for their possible effects on the restoration survivals. Some 1476 polished restorations were placed in hospital patients by a large number of operators and asse...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1991-09-01 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：PURPOSE:This prospective long-term clinical trial evaluated and compared the three-year clinical performance of an ormocer, a nanofilled, and a nanoceramic resin composite with that of a microhybrid composite placed in Class I and Class II cavities. METHODS:Forty patients, each with four Class I and II restorations un...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-313-C
更新日期：2014-01-01 00:00:00
abstract：:This study examined the relationship between the bond agent application duration and the dentin bond strength of several single-application bonding systems. The restorative material/ bonding systems used were Reactmer, with its single-application bonding system Reactmer Bond (RB, Shofu Inc, Kyoto, Japan); Palfique Est...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2002-05-01 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：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：:The clinical performance of light curing resin composites is greatly influenced by the quality of the light-curing unit (LCU). Halogen LCUs are commonly used for curing composite materials. However, they have some drawbacks. The development of new, blue, super bright light emitting diodes (LED LCU) of 470-nm wavelengt...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2005-01-01 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：CLINICAL RELEVANCE:New dual-cure bulk-fill composites show promise for uniform degree of conversion and microhardness throughout the entire depth of direct restorations. SUMMARY: ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-074-L
更新日期：2020-07-01 00:00:00
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. Filte...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/10-105-L
更新日期：2011-05-01 00:00:00
abstract：:The current study evaluated the chromatic influence of high, medium and low value composites on a dentin composite substrate (A2 shade) using spectrophotometric analysis. The specimens were divided into the following four groups: a) control (CG), entirely composed of dentin composite (n = 5); b) high value (GHV), dent...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/09-44-L
更新日期：2010-01-01 00:00:00
abstract：:The stronger the ceramic material, the longer the restoration stays in the mouth. The current study evaluated the two-year clinical performance of a strong ceramic system, IPS Empress II, with increased strength on onlay/inlay restorations of molars. Teeth from 35 patients, including three premolars and 32 molars, wer...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/08-97
更新日期：2009-07-01 00:00:00
abstract：:No data are available on the direct acute vascular effect of dental bonding materials on the dental pulp. This study investigated the effects of the components of a composite resin-bonding system on pulpal vascular diameter. Three groups of 10 male Sprague-Dawley rats (weighing 330 +/- 51 g) were used for this investi...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2000-09-01 00:00:00
abstract：:This study evaluated the degree of conversion (%DC) of luting agents around ceramic inlays placed in deep natural cavities. Thirty-six cylindrical Class I cavities (diameter = 4 mm, depth = 4 mm) were prepared in freshly extracted human teeth and randomly divided according to the luting materials used for luting CAD/C...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/10-012-L
更新日期：2010-09-01 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 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：OBJECTIVE:The aim of this study was to compare the in vivo diagnostic ability of a laser fluorescence system (DIAGNOdent, KaVo, Biberac, Germany) with that of visual inspection in the early detection of occlusal caries in newly erupted noncavitated first permanent molars among caries-active children. MATERIALS AND MET...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-309-C
更新日期：2011-07-01 00:00:00
abstract：:This study investigated the influence of different light sources associated with a transdental photoactivation technique on the marginal adaptation and hardness of composite restorations. Cavities (3 mm wide x 3 mm long x 1.5 mm in deep) were prepared on flattened bovine dentin and filled with Z250 composite (3M ESPE)...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/07-109
更新日期：2008-07-01 00:00:00
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：:Amalgam has been used in the restoration of structurally compromised posterior teeth for many years. When placing large amalgam restorations, replacement of weak cusps with restorative material is recommended to prevent tooth fracture. This recommendation can be modified with new guidelines using modern adhesive techn...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-082-T
更新日期：2012-07-01 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：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：OBJECTIVE:This study evaluated the differences in enamel color change, surface hardness, elastic modulus, and surface roughness between treatments with four bleaching gels containing carbamide peroxide (two at 10% and one each at 35%, and 45%) and two bleaching gels containing hydrogen peroxide (two at 40%). METHODS:E...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-010-L
更新日期：2016-01-01 00:00:00
