Abstract:
:The aim of this in vitro study was to evaluate the effects of different preparation angles on the precision of fit of zirconia crown frameworks. Dies were fabricated with three different preparation angles: 4, 8, and 12 degrees total taper. Ten copings were fabricated for each angle by a laboratory and a milling-center CAD/CAM system. After cementation, cross-sections were obtained and cement gaps were measured. Preparation angle (ANOVA, p < 0.01) and measurement location (ANOVA, p < 0.01) exhibited statistically significant influence on the precision of fit. On the other hand, no statistically significant influences were detected between copings prepared using the laboratory and milling-center CAD/CAM systems (ANOVA, p = 0.92). All groups showed marginal openings ranging between 36.6 and 45.5 microm. In light of the results obtained in this study, a preparation angle of 12 degrees is hence recommended with the confidence that the marginal gap will be consistently less than 50 microm.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Beuer F,Edelhoff D,Gernet W,Naumann Mdoi
10.4012/dmj.27.814subject
Has Abstractpub_date
2008-11-01 00:00:00pages
814-20issue
6eissn
0287-4547issn
1881-1361journal_volume
27pub_type
杂志文章abstract::The kinetic polymerization behavior of 2,2,2-trifluoroethyl methacrylate (TFEMA), 1,1,1,3,3,3-hexafluoroisopropyl methacrylate (HFIPMA), 2,2,2-trifluoroethyl acrylate (TFEA) and 1,1,1,3,3,3-hexafluoroisopropyl acrylate (HFIPA) was determined by isothermal differential scanning calorimetry (DSC) and high-performance li...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2010-054
更新日期:2010-10-01 00:00:00
abstract::The purpose of this study was to examine the effect of an electro-ionizing toothbrush with stannous fluoride in the treatment of dentin hypersensitivity following periodontal surgery. Thirty-two volunteers with dentin hypersensitivity were divided in two equal groups each using different methods: (Group I) stannous fl...
journal_title:Dental materials journal
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.4012/dmj.20.164
更新日期:2001-06-01 00:00:00
abstract::Previously, high temperature properties of the silver-palladium-copper-gold alloy were investigated. In this study, the thermal expansion percentage and coefficient, and high temperature strengths of ADAS Type 3 gold alloy were investigated up to the liquidus temperature. Furthermore, microstructural and compositional...
journal_title:Dental materials journal
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doi:10.4012/dmj.23.81
更新日期:2004-06-01 00:00:00
abstract::An experimental primer was developed as a single-step bonding system for resin-modified glass ionomer cements (GIC). Efficacy of this primer on adhesion of resin-modified GICs and resin composite to enamel and dentin was evaluated by shear bond test and SEM observation. Good bond strengths to enamel were obtained (> 1...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.16.40
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abstract::A new tensile fatigue test using a stainless steel screw was introduced. A transparent PMMA rod was selected as the test material. A hole was drilled and tapped into the rod; a screw was put into the rod with dental cement or without cementation. Three types of cyclic loads were applied to the test piece; the number o...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.11.141
更新日期:1992-12-01 00:00:00
abstract::The aim of the present work was to investigate the effect of the different organically modified nanoclays on clinically significant properties of new synthesized dental pit and fissure nanocomposite sealants. Their morphological characteristics were examined by means of X-ray diffraction (XRD) analysis and scanning el...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2019-214
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abstract::To clarify the mechanical properties of fiber-reinforced hybrid resin bridges, this study evaluated the influence of various bonding agents ((Modeling Liquid (ML), DE Resin (DE), Bell Bond (BE), Mega Bond (MG), Durafil Bond (DU), Fluoro Bond (FB), Mac-Bond (MC), EG Bond (EG), Unifill Bond (UN), Single Bond (SN)) impre...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.27.723
更新日期:2008-09-01 00:00:00
abstract::The aim of this study was to evaluate the trial Teaching Robot for the development of a contact-type measuring apparatus for using directly in the oral cavity. A standard model was used to mimic the dentition by placing an arrangement of three bearing balls. The diameters of the balls were measured. A practical dentit...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.22.168
更新日期:2003-06-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.22.227
更新日期:2003-09-01 00:00:00
abstract::This study assessed the impact of surface treatments and repair resin reinforcement with zirconium oxide nano-particles (nano-ZrO2) on flexural strength (FS) of repaired denture base. A total of 320 heat-polymerized acrylic resin specimens were prepared and sectioned creating 2-mm gap. According to repair surface trea...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2018-436
更新日期:2020-06-05 00:00:00
abstract::The purpose of this study was to investigate the effect of laser irradiation on the enamel surface spectroscopically. Polished bovine enamel surface was irradiated with an Er:YAG laser apparatus and chemically analyzed using X-ray photoelectron spectroscopy (XPS). XPS detected core electron peaks such as carbon (C 1s)...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.25.214
更新日期:2006-06-01 00:00:00
abstract::This study evaluated the effect of different adhesive protocols on the shear bond strength (SBS) of bulk-fill resin composite repaired with bulk-fill or conventional composite. Cylindrical bulk-fill resin composite specimens were prepared and allocated into groups according to the bonding strategy: no treatment, Silan...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2018-291
更新日期:2020-03-31 00:00:00
abstract::The purpose of the this study was to evaluate the cytotoxicity of dental resin monomers in the presence of a rat liver S9 mix containing cytochrome P 450 enzymes. JTC-12 cells derived from a monkey kidney were seeded on a 96-well multi-well-plate at 9 x 10(3) cells per well. After cultivation, the S9 mix was added to ...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.18.76
更新日期:1999-03-01 00:00:00
abstract::This study evaluated the effect of adding silane coupling agent on initial and long-term bond strengths of one-step self-etch adhesives to enamel-dentin-composite in combined situation. Cervical cavities were prepared on extracted molars and filled with Clearfil AP-X. After water-storage for one-week, the filled teeth...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2015-050
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to evaluate the cytotoxicity of contemporary flowable and paste-like bulk-fill dental composites by using a real-time cell analysis. In the present paper, cytotoxicity levels of five flowable, five paste-like bulk-fill composite materials and one conventional flowable, one conventional paste-...
journal_title:Dental materials journal
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.16.117
更新日期:1997-12-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.17.264
更新日期:1998-12-01 00:00:00
abstract::This study examined the antimicrobial/antifungal ability of a tissue conditioner containing a photocatalyst for Escherichia coli, Streptococcus mutans, Staphylococcus aureus and Candida albicans. The photocatalyst was mixed with tissue conditioners powders at concentrations of 0, 10, 15, and 20 wt%. Tissue conditioner...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2010-203
更新日期:2011-01-01 00:00:00
abstract::The purpose of this study was to analyze the ultrastructures and chemical compositions of precipitates formed on mineral trioxide aggregate (MTA; White ProRoot MTA) immersed in distilled water (DW) or phosphate buffered saline (PBS), based on the attribution that MTA's bioactivity and sealing ability are influenced by...
journal_title:Dental materials journal
pub_type: 杂志文章,随机对照试验
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journal_title:Dental materials journal
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2019-111
更新日期:2020-06-05 00:00:00
abstract::Adhesion promoting monomers for dental metals, 5-(4-vinylbenzyl)-2-thiobarbituric acid (5VS), 6- (4-vinylbenzyl-n-propyl) amino-1,3,5-triazine-2,4-dithione (VBATDT) and 9,10-epithiodecyl methacrylate (EP8MA), were synthesized and surface treatment agents were prepared by dissolving each monomer in ethanol or acetone. ...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.22.343
更新日期:2003-09-01 00:00:00
abstract::This study was carried out to investigate the influences of elastic moduli of the dowel-core combination on the stress distribution in the root by the use of 2-dimensional finite element analysis. The peak stress at the dowel-cement interface was influenced strongly by a change of elastic modulus of the post (from 20,...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.19.50
更新日期:2000-03-01 00:00:00
abstract::This study evaluated the biomineralization and dentinal tubules occlusion abilities of the carboxyl-terminated polyamidoamine dendrimer (PAMAM-COOH) on human demineralized dentin in vivo at different time points. Demineralization dentin model with and without treated with PAMAM-COOH were sutured to the interior side o...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2015-209
更新日期:2016-01-01 00:00:00
abstract::The purposes of this study were to examine the shock absorption capability of addition-cured silicone denture relining materials and the bonding strength of addition-cured silicone denture relining materials and a commercial mouthguard material to determine its applicability to mouthguard adjustment. Two addition-cure...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2015-378
更新日期:2016-01-01 00:00:00
abstract::This study investigated the anti-demineralization effects of surface pre-reacted glass-ionomer (S-PRG) filler-containing varnishes. Thirty-five bovine root specimens were divided into five treatment groups, with seven specimens each coated with 1) MI varnish (MIV), 2) F varnish (FV), 3) PRG varnish I (PV), 4) PRG varn...
journal_title:Dental materials journal
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更新日期:2020-11-11 00:00:00
abstract::This study tested whether exhaled humid conditions would affect the adhesion of etch-and-rinse, two-step and one-step self-etch adhesive resins to enamel. Enamel surfaces of human maxillary anterior teeth (N=240, n=20) were exposed to four humid conditions (H1: 63-68%, H2: 73-78%, H3: 93-98%, H4: 36-45% RH) during bon...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2012-200
更新日期:2013-01-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章,随机对照试验
doi:10.4012/dmj.2009-074
更新日期:2010-08-01 00:00:00
abstract::This study investigated the durability, especially the nonwaterdegradable qualities, of experimental light-cured composite resin containing barium-borosilicate glass filler. For this purpose, Bis-GMA, a typical component of base monomer in conventional composite resin, was replaced by Bis-GMA-F which is water-repellen...
journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:1993-06-01 00:00:00