Abstract:
OBJECTIVES:To evaluate the effect of hydrothermal aging (H), mechanical cycling (M), and the combination of hydrothermal plus mechanical cycling (H+M) on biaxial flexural strength (BFS) and microstructure of two monolithic zirconias, indicated for anterior (AMZ) or posterior restorations (PMZ) and a conventional zirconia (IZr). METHODS:Disc specimens of each material (n=12) were submitted to: i) H (8h in autoclave at 134°C); ii) M (106 cycles, at 40% of BFS); and iii) H+M. BFS was measured (ISO-6872) and Weibull modulus (m) and the characteristic strength (σ0) were calculated. crystalline phase composition analyzed by XRD, and grain size measured by MEV analysis. RESULTS:XRD analysis showed AMZ was not susceptible to monoclinic transformation in any treatment. Conventional zirconia (IZr) and PMZ had monoclinic transformation only after H and H+M. BFS of AMZ was lower than PMZ and IZr. Cubic phase was found in all conditions for AMZ and IZr, while it was identified in PMZ only after H and H+M. BFS of AMZ was affected by M and H+M. For IZr and PMZ the unique difference detected in BFS was in the comparison of H to M. H treatment induced lower Weibull modulus, but characteristic strength was compatible with the BFS results. AMZ grain size (μm2) was 8.6 times larger than PMZ grains, and 13.6 times larger than IZr grains. CONCLUSIONS:AMZ showed the largest mean grain size, had the lowest BFS values, and was affected when mechanical cycling was involved. Monoclinic transformation was not found in any treatment for AMZ, but was found in IZr and PMZ when hydrothermal aging was used alone or when combined with mechanical cycling. PMZ showed similar behavior to the IZr. H induced to higher fracture probability. CLINICAL SIGNIFICANCE:Translucent monolithic dental zirconia available on the market may behave differently under simulated oral aging. The relationship between composition and microstructure determines their properties presumably, and clinical performance.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Muñoz EM,Longhini D,Antonio SG,Adabo GLdoi
10.1016/j.jdent.2017.05.021subject
Has Abstractpub_date
2017-08-01 00:00:00pages
94-102eissn
0300-5712issn
1879-176Xpii
S0300-5712(17)30131-8journal_volume
63pub_type
杂志文章abstract:OBJECTIVE:To investigate the effect of three manual toothbrushes on dental plaque and gingival inflammation. METHODS:The elmex Sensitive Extra Soft (ESES), elmex Sensitive Soft (ESS) and an ADA standard toothbrush (ADAS) were evaluated in a randomized clinical trial. Subjects brushed twice daily in their usual manner....
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2007.04.005
更新日期:2007-07-01 00:00:00
abstract:OBJECTIVES:The aim of the present study was to review the current literature relating to the impact of dental implants on oral health-related quality of life (OHRQoL) in edentulous or partially dentate patients. DATA/SOURCES:Systematic literature searches were performed in the PubMed, EMBASE, and Cochrane Library data...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/j.jdent.2017.08.003
更新日期:2017-10-01 00:00:00
abstract:OBJECTIVES:To determine the phenotypic and molecular characteristics of Enterococcus faecalis recovered from primary endodontic infections in Brazilian patients. METHODS:Twenty isolates of E. faecalis recovered from 43 Brazilian patients with primary endodontic infections were identified by biochemical profiling (API2...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2013.07.004
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVE:To investigate whether bleaching prior to placement of a composite veneer had an effect on the final shade of the restoration and whether this was affected by the thickness or shade of the veneer. METHODS:Twenty bovine teeth were collected, sectioned and divided into two groups. One group was the non-bleache...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2008.04.004
更新日期:2008-07-01 00:00:00
abstract::Twenty healthy volunteers entered a study to assess cardiopulmonary responses, as measured by pulse oximetry, following changes in posture in the dental chair and the administration of Diazemuls (diazepam) in doses sufficient to instill sedation (up to a maximum dose of 20 mg) in the volunteers to a degree such that p...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(92)90080-v
更新日期:1992-08-01 00:00:00
abstract:OBJECTIVES:This in vivo study compared the antibacterial effect of a self-etch adhesive with and without the brominated monomer 12-methacryloyloxydodecyl-pyridinium bromide (MDPB) on carious dentin after selective caries removal. METHODS:10 patients showing deep primary carious lesions at two posterior teeth without p...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103555
更新日期:2020-12-17 00:00:00
abstract:OBJECTIVES:The purpose of this study was to determine enamel and dentin bond durability after long-term water storage using self-etch adhesives. METHODS:Two single step self-etch adhesives (SU, Scotchbond Universal and GB, G-ӕnial Bond) and a two-step self-etch adhesive (OX, OptiBond XTR) were used. The shear bond str...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2015.10.018
更新日期:2015-12-01 00:00:00
abstract:OBJECTIVES:This systematic review aimed to verify if there is difference in the longevity of minimally invasive techniques compared to the complete replacement for the treatment of defective direct restorations in permanent teeth. DATA:The data included randomized controlled clinical trials comparing the clinical perf...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.09.001
更新日期:2018-11-01 00:00:00
abstract:AIM:To evaluate the effect of fluoride iontophoresis on the microtensile bond strength (MTBS) between coronal dentin and two resin-based adhesive systems, and to measure quantitatively dentinal tubule occlusion. METHODS:Twelve freshly extracted intact human mandibular third molars were divided randomly into four group...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2008.04.018
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to investigate the kinetics of protein interactions with a novel hydroxyapatite-polylactide (HA-PLA) composite membrane material. METHODS:Trilayer PLA and HA-PLA composite membranes reinforced with PLA fibres were used to absorb and release protein which was measured by a BioRad as...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2009.06.014
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVES:The aim of this double-blind clinical trial was to assess the longevity of repairs to localized clinical defects in composite resin restorations that were initially planned to be treated with a restoration replacement. METHODS:Twenty-eight patients aged 18-80 years old with 50 composite resin restorations (...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2014.05.015
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVE:To evaluate a novel methodology using industrial scanners as a reference, and assess in vivo accuracy of 3 intraoral scanners (IOS) and conventional impressions. Further, to evaluate IOS precision in vivo. METHODS:Four reference-bodies were bonded to the buccal surfaces of upper premolars and incisors in fiv...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2017.12.006
更新日期:2018-02-01 00:00:00
abstract:OBJECTIVES:The dysbiotic oral microbiome plays a key role in the pathogenesis of caries in children. Topical application of casein phosphopeptide-amorphous calcium phosphate containing fluoride (CPP-ACP/F) is an effective treatment modality for children with caries (CC). Hitherto the mechanism by which CPP-ACP/F module...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2021.103582
更新日期:2021-01-12 00:00:00
abstract:OBJECTIVE:To investigate the association between xerogenic medication use and tooth wear among American adults and whether this association can be explained by subjective oral dryness. METHODS:We used data from 3578 adults who participated in the National Health and Nutritional Examination Survey (NHANES). Tooth wear ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103542
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVES:After removal of dentine caries lesions, cavity lining has been advocated. Non-clinical data support this approach, but clinical data are sparse and ambiguous. We aimed at evaluating the benefits and harms of cavity lining using meta-analysis and Trial Sequential Analysis. DATA:We included randomized clinic...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/j.jdent.2015.07.017
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to evaluate influence of different shade guides and respective shade matching methods on shade matching results and to analyze user satisfaction with these products and methods. METHODS:Eighty-eight pre-doctoral dental students completed the study. The color of four target shade t...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2009.02.005
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVES:This study concerned the temperature and linear dimensional change of heat-cured acrylic resin in the two-stage processing technique for complete dentures. METHODS:Thermocouples were incorporated in the acrylic resin for recording temperatures. Measurements between reference marks were made by a high-resolu...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(95)91190-x
更新日期:1995-08-01 00:00:00
abstract:OBJECTIVES:This study investigated the effects of the surface conditioning of nano-zirconia fillers with 10-methacryloyloxydecyl dihydrogen phosphate (MDP) and dipentaerythritol penta-acrylate phosphate (PENTA) on the degree of conversion and mechanical properties of Bis-GMA- and UDMA-based resin composites containing ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103306
更新日期:2020-03-01 00:00:00
abstract::A significant correlation was found between the number of mutans streptococci in saliva and the proportional distribution of these microorganisms in pooled plaque from the margins of all restorations. At high salivary numbers there was a tendency towards a higher porportion of mutans streptococci in plaque from the ma...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(92)90130-5
更新日期:1992-06-01 00:00:00
abstract:OBJECTIVES:Dentine modifies pulpward diffusion of monomers leaching from restorative materials. Thus, remaining dentine thickness must be taken into account during in vitro cytotoxicity tests. This in vitro study was designed to determine the influence of dentine permeability on the outcome of a cytotoxicity test. MET...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(98)00019-0
更新日期:1998-07-01 00:00:00
abstract:OBJECTIVES:Demineralized lesions in tooth enamel around orthodontic brackets are caused by acids from cariogenic biofilm. This study aimed to develop a novel antibacterial orthodontic cement by incorporating a quaternary ammonium monomer dimethylaminododecyl methacrylate (DMADDM) into a commercial orthodontic cement, a...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2014.07.006
更新日期:2014-09-01 00:00:00
abstract::The purpose of this study was to evaluate the effect of a coaxial carbon dioxide/neodymium:yttrium aluminium garnet laser beam on enamel surface roughness and the dental pulps of mongrel dogs. In four dogs, four maxillary left posterior teeth were irradiated at 16 cm source-tooth distances. Two teeth were irradiated w...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(91)90095-g
更新日期:1991-04-01 00:00:00
abstract::The complexity of the oral environment, and ethical problems associated with studies of oral diseases in humans inevitably directed the attention to development of laboratory models, that simulate the human oral microcosm. These developments and in particular the in vitro 'artificial mouth' systems have progressed fro...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/s0300-5712(03)00009-5
更新日期:2003-03-01 00:00:00
abstract:OBJECTIVES:Toothbrushing and interdental cleaning are critical to maintaining good oral health. Literature is beginning to suggest that these behaviours may be conducted automatically, although the instigation ('deciding to do') and execution ('doing') of these behaviours has never been examined separately. The objecti...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103470
更新日期:2020-11-01 00:00:00
abstract:OBJECTIVES:Three activated organofunctional silane coupling agents alone and blended with a non-functional cross-linker silane were evaluated as adhesion promoters in an experiment where a bis-GMA (bis-phenol-A-diglycidyldimethacrylate) resin was bonded to silicatized titanium. The adhesive performances of the silanes ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.01.008
更新日期:2006-11-01 00:00:00
abstract:OBJECTIVES:A meta-analysis was conducted to assess the relationship between parental age and the occurrence of non-syndromic oral clefts. The questions addressed if younger or older mothers and fathers have an increased risk of having a child with non-syndromic oral clefts. DATA:Data from cohort studies, case-control,...
journal_title:Journal of dentistry
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.jdent.2011.10.002
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVES:Small and hydrophilic monomers as HEMA and TEGDMA can easily penetrate human tissues. For biocompatibility issues it is therefore better to avoid such monomers in dental adhesive formulations. The purpose of this study was (1) to determine the micro-tensile bond strength (muTBS) to enamel/dentin of a HEMA/TE...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2008.05.012
更新日期:2008-10-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess the prevalence of direct restorations in posterior teeth in children aged 12, from a birth cohort, and to test the association between the quality of the restorations and individual variables experienced in the life cycle. METHODS:All live-born children in Pelotas, in 200...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2019.103183
更新日期:2019-10-01 00:00:00
abstract:OBJECTIVE:This study evaluated the effect of 2% chlorhexidine-containing acid (Ac/CHX) and 2% chlorhexidine digluconate solution (CHX) on immediate (IM) and 2-year (2Y) resin-dentin bond strength (BS) and silver nitrate uptake (SNU) for two simplified etch-and-rinse adhesives. METHODS:Forty-two caries-free extracted m...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2010.10.001
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVES:To evaluate the correlation between the shark fin test and the dimensional accuracy of impressions, surface detail reproduction of impressions and rheological properties of impression materials within the manufacturer's recommended working time. METHODS:Four chemically different types of impression material...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.11.009
更新日期:2007-05-01 00:00:00