Abstract:
:The aim of this study was to evaluate the effect of grinding with diamond burs and low-temperature aging on the material surface characteristics and bacteria adhesion on a yttrium-stabilized tetragonal zirconia polycrystalline (Y-TZP) surface. Y-TZP specimens were made from presintered blocks, sintered as recommended by the manufacturer, and assigned into six groups according to two factors-grinding (three levels: as sintered, grinding with extra-fine diamond bur [25-μm grit], and grinding with coarse diamond bur [181-μm grit]) and hydrothermal aging-to promote low-temperature degradation (two levels: presence/absence). Phase transformation (X-ray diffractometer), surface roughness, micromorphological patterns (atomic force microscopy), and contact angle (goniometer) were analyzed. Bacterial adhesion (colony-forming units [CFU]/biofilm) was quantified using an in vitro polymicrobial biofilm model. Both the surface treatment and hydrothermal aging promoted an increase in m-phase content. Roughness values increased as a function of increasing bur grit sizes. Grinding with a coarse diamond bur resulted in significantly lower values of contact angle (p<0.05) when compared with the extra-fine and control groups, while there were no differences (p<0.05) after hydrothermal aging simulation. The CFU/biofilm results showed that neither the surface treatment nor hydrothermal aging simulation significantly affected the bacteria adherence (p>0.05). Grinding with diamond burs and hydrothermal aging modified the Y-TZP surface properties; however, these properties had no effect on the amount of bacteria adhesion on the material surface.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Dutra D,Pereira G,Kantorski KZ,Exterkate R,Kleverlaan CJ,Valandro LF,Zanatta FBdoi
10.2341/16-108-Lsubject
Has Abstractpub_date
2017-11-01 00:00:00pages
669-678issue
6eissn
0361-7734issn
1559-2863journal_volume
42pub_type
杂志文章abstract:PURPOSE:To evaluate the effect of zirconia primers, air-abrasion, and tribochemical surface treatment methods on the shear bond strength between yttria-tetragonal zirconia polycrystal (Y-TZP) ceramic and self-adhesive resin cement. METHODS AND MATERIALS:Y-TZP ceramic surfaces were ground flat with 600-grit silicon car...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/13-149-L
更新日期:2015-01-01 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: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 investigated the effect of three equivalent radiant exposure energy application sequences (EASs): high intensity power (HIP: 1,177 mW/cm2, 40 seconds), low intensity power (LOP: 573 mW/cm2, 71 seconds) and ramp (RMP: 650 mW/cm2, 5 seconds, then the irradiance increases to 1047 mW/cm2, 37 seconds) on the mic...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-30
更新日期:2007-03-01 00:00:00
abstract::The authors describe a minimally invasive procedure for occlusal rehabilitation in a young patient presenting with mild mandibular prognathism and loss of occlusal vertical dimension caused by dental erosion from chronic gastroesophageal reflux. ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/09-110T
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVE:This clinical study aimed to assess the efficacies of mineral trioxide aggregate (MTA) and calcium hydroxide [Ca(OH)2] in the treatment of deep carious lesions by the direct complete caries removal technique. METHODS AND MATERIALS:A total of 100 permanent molar/premolar teeth were capped with either Ca(OH)2 ...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/16-110-C
更新日期:2017-09-01 00:00:00
abstract::Bleaching-induced tooth sensitivity (TS) is highly prevalent. OBJECTIVE:This study aimed to determine if the combination of opioids and nonopioids analgesics (Tylex) may provide a better analgesic effect. METHOD:A triple-blind, parallel, randomized two-center clinical trial was conducted with 105 healthy patients wh...
journal_title:Operative dentistry
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.2341/17-092-C
更新日期:2018-03-01 00:00:00
abstract:OBJECTIVES:Whitening efficacy has been related to hydrogen peroxide (HP) diffusion into tooth structure. However, little information is available relating rheological properties to whitening efficacy. The purpose was to evaluate the whitening efficacy and HP penetration level of a 10% HP gel at three different viscosit...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/17-099-L
更新日期:2018-05-01 00:00:00
abstract::The aim of this investigation was to verify the influence of 3 light curing units on the degree of conversion, using different irradiation conditions: 1) manufacturers' recommended times of photo-activation, 2) standardizing total energy density among the units and 3) standardizing energy density at the 450-490 nm wav...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/05-81
更新日期:2006-07-01 00:00:00
abstract::Recently, manufacturers introduced presterilized, single-use, plastic light-curing tips to be used either routinely or on patients with known or questionable communicable health concerns. The purpose of this study was to examine the effect of these single-use tips on light transmission compared to conventional fiber-o...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1998-07-01 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 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 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::In the direct treatment of cervical lesions and to improve the impression-making procedure prior to fabricating indirect restorations, exposure of the gingival sulcus and control of hemorrhage or gingival fluid seepage are a prerequisite. For gingival displacement, cords impregnated with medicaments are widely used. I...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2002-07-01 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::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::Although rare, subcutaneous air emphysema can occur during dental procedures such as endodontic treatment, surgical extractions, and preparing a tooth for an indirect or direct dental restoration. We report the development of a subcutaneous air emphysema that was introduced through the periodontal ligament of an untre...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/15-155-S
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the influence of thermal cycling on the flexural properties and simulated wear of computer-aided design/computer-aided manufacturing (CAD/CAM) resin composites. METHODS:The six CAD/CAM resin composites used in this study were 1) Lava Ultimate CAD/CAM Restorative (LU)...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-046-L
更新日期:2017-01-01 00:00:00
abstract::This study evaluated the pulp biocompatability of a new light-cured composite resin which was placed in etched glass-ionomer-lined cavities of monkey teeth. The pulpal response to this material was less than that to zinc-oxide eugenol cement in each observation period. Therefore this material seems to meet acceptable ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1991-07-01 00:00:00
abstract::One hundred non-carious, non-undercut cervical lesions were restored with Silux Plus or Estio LC and bonded with Fuji Bond LC. The restorations were evaluated yearly for retention and marginal discoloration. After five years, the overall retention rate was 96%. Of the 41 restorations examined at five years, five had c...
journal_title:Operative dentistry
pub_type: 临床试验,杂志文章
doi:
更新日期:2002-09-01 00:00:00
abstract:OBJECTIVES:To evaluate the clinical behavior of one-piece complete-coverage crowns and fixed partial dentures (FPDs) on teeth with vertical preparation without finish line biologically oriented preparation technique (BOPT). METHODS AND MATERIALS:This prospective study included 52 patients requiring treatment with rest...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-124-C
更新日期:2018-09-01 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 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::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:PURPOSE:To investigate clinical performance of a low-shrinkage silorane-based composite resin when used for repairing conventional dimethacrylate-based composite restorations. BACKGROUND:Despite the continued development of resin-based materials, polymerization shrinkage and shrinkage stress still require improvement....
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/11-121-C
更新日期:2012-09-01 00:00:00
abstract::This study evaluated the effect of an intracoronal resin composite pin on Class IV resin composite restorations. A control group of 16 bovine teeth was prepared with standardized conventional Class IV preparations. For an experimental group, 16 similar Class IV preparations were made, with the addition of an intracoro...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract::Excessive etching of the dentin may decrease bond strength because the adhesive may fail to completely infiltrate to the base of the over-etched demineralized collagen network. The purpose of the present study was to evaluate the influence of increasing etching times on the microtensile bond strength of Single Bond an...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1999-05-01 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::This study investigated the effect of conventional and acidified casein phosphopeptide-amorphous calcium phosphate-containing crèmes (CPP-ACP and ACPP-ACP) on dentin permeability (DP) before and after acid challenge, using a fluid-flow measuring device and scanning electron microscopic (SEM) examination. Fifty dentin ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-382-L
更新日期:2019-09-01 00:00:00
abstract::While a one-year report had been previously published, this study was undertaken to evaluate the clinical performance and appearance of a resin-modified glass ionomer and a resin composite over two years. Thirty-seven pairs of restorations of FujI II LC and Z 250/Single Bond were placed in caries-free cervical erosion...
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:2003-09-01 00:00:00