Abstract：
:This study compared microleakage of composite bonded to etched flattened enamel in seven groups of five extracted maxillary molars. The facial enamel of the molars was ground flat and etched for 20 seconds with 37% phosphoric acid gel. In one group, etching gel was not rinsed but dried only. In four groups, gel was rinsed with an air/water spray for varying amounts of time. In the other two groups, gel was rinsed with water only for two different amounts of time. Etched surfaces were dried, and a liquid resin was applied and polymerized; a button of composite resin was polymerized to the flattened surface. Specimens were thermocycled, stained, then sectioned longitudinally. Microleakage was measured at the occlusal and gingival enamel margins and expressed as a percentage of the total length of interface. A mean (SD) percentage microleakage was determined at the occlusal and at the gingival margins for each group as follows: no rinse--89.60 (14.34); one second--water 0 (0), air/water 0 (0); three seconds--water 0.98 (1.34), air/water 0 (0); five seconds--air/water 0 (0); 20 seconds--air/water 0 (0). Because of abnormal distribution, data were analyzed using Wilcoxon two-sample tests. The no-rinse group had significantly more microleakage than any of the other groups (P = 0.0067), which were not significantly different from each other (P = 0.18). A one-second rinse with either water or air/water spray was as effective as a 20-second rinse with air/water spray in preventing microleakage at the resin-enamel interface.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Summitt JB,Chan DC,Dutton FB,Burgess JOsubject
Has Abstractpub_date
1993-01-01 00:00:00pages
37-40issue
1eissn
0361-7734issn
1559-2863journal_volume
18pub_type
杂志文章abstract：:This in vitro study evaluated the interfacial integrity of Class II resin composite restorations. The influence of a flowable composite and additional enamel etching was also evaluated. Deep, saucer-shaped Class II cavities were prepared in the mesial and distal proximal surfaces of 25 extracted human molars and assig...
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：2001-01-01 00:00:00
abstract：:This study investigated the reasons for placement and replacement of dental restorations in the United States Navy Dental Corps. The relationship between restoration longevity and the reasons for replacement of restorations was also studied. Data on newly placed dental restorations were collected from restorative dent...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1993-09-01 00:00:00
abstract：:Ceramic root-canal posts offer potential advantages over other types with respect to aesthetics and biocompatibility. Any post must be sufficiently rigid and retentive to withstand functional forces. Ceraposts (1.2 mm coronal diameter, ceramic, tapering, smooth posts) and Paraposts (1.25 mm, stainless-steel, parallel,...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2000-05-01 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：: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：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
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: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：OBJECTIVES:It has been reported that bleaching generates an increase in the activity of osteoclasts in vitro. We quantified the RANK-L and IL-1β biomarkers in a double-blind, randomized clinical trial evaluating the in vivo effect of hydrogen peroxide (35%) and peroxide carbamide (37%) six months after whitening. METH...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/18-023-C
更新日期：2019-11-01 00:00:00
abstract：:Good wettability is one of the desirable physical properties of mercury-free gallium-based alloys (Gallium Alloy GF). However, wettability, while providing good adhesion to the cavity wall, has the adverse effect of causing stickiness to the inside of the capsule during mixing, and also to the metal hand instruments u...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:Cracked tooth syndrome is known to occur most frequently in heavily restored teeth. Nevertheless, when the symptoms occur in intact teeth, there is difficulty in obtaining a correct diagnosis because it is difficult for the dentist to find where the crack is located. This clinical report describes the diagnostic proce...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/13-257
更新日期：2014-09-01 00:00:00
abstract：CLINICAL RELEVANCE:When a resin nanoceramic inlay is cemented using self-adhesive cement, a universal dentin adhesive can be applied to the prepared cavity. The application of the adhesive before self-adhesive cement placement provides similar or better interfacial adaptation than without the adhesive. SUMMARY:Purpose...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-141-L
更新日期：2020-11-01 00:00:00
abstract：:SUMMARY The purpose of this study was to evaluate the influence the width of the occlusal isthmus and inlay material had on the stress distribution, displacement, and fracture resistance of upper human premolars. For this in vitro test, 35 intact upper premolars (UPM) were selected and five were kept intact for the co...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/13-092-L
更新日期：2014-07-01 00:00:00
abstract：:The available and proposed methods for determining the in vivo occlusal wear values of classes 1 and 2 restorations made of resinfilled composite materials are critically reviewed. A methodology to be used to address the fundamental question of the link between the wear of the in vivo restorations and the relevant mec...
journal_title：Operative dentistry
pub_type： 杂志文章,评审
doi：
更新日期：1991-03-01 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：: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 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：: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 investigated the effect of a crown-lengthening ferrule on the fracture resistance of endodontically-treated teeth restored with two dowel-core systems. Thirty-two extracted mandibular first premolars were sectioned perpendicular to the long axis at a point 1.0 mm occlusal to the buccal cementoenamel junctio...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/06-169
更新日期：2007-11-01 00:00:00
abstract：:The purpose of this study was to develop an accurate and reproducible intraoral method of measuring the distance between two teeth, and to conduct a clinical pilot study of the effect of placement of a class 2 posterior resin restoration upon this intertooth dimension. A Kaman Sciences KD-2611 noncontact displacement ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1989-10-01 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：: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：:The replacement of a restoration is one of the most common procedures in dentistry. However, the criteria for such intervention, excluding catastrophic failure and persistent discomfort and pain, continue to be the subject of considerable debate. The decision-making process remains subjective on the part of the treati...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-058-O
更新日期：2016-09-01 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：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：OBJECTIVE:The purpose of this study was to evaluate the effect of phosphoric acid pre-etching times on shear bond strength (SBS) and surface free energy (SFE) with single-step self-etch adhesives. METHODS:The three single-step self-etch adhesives used were: 1) Scotchbond Universal Adhesive (3M ESPE), 2) Clearfil tri-S...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/15-221-L
更新日期：2016-07-01 00:00:00
abstract：:The objective of this paper is to review the literature concerning factors affecting adhesion to mineralized tissues. Factors related to the physicochemical structure of the adherents and to the inherent properties of composite restorative materials, along with the postulated bonding mechanisms of current adhesive sys...
journal_title：Operative dentistry
pub_type： 杂志文章,评审
doi：
更新日期：1992-01-01 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 compared the degree of marginal leakage of a compomer in Class V cavities of human primary molars prepared by a conventional dental bur and air abrasion with or without acid etching. Fifty-six non-carious extracted primary molars were randomly divided into four groups (n=14) to be prepared by four technique...
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：2005-03-01 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
