Abstract:
:Two types of patterns were tested for castability: 1) polyester mesh pattern (20mm x 22mm with 100 open squares) and 2) 20mm x 20mm wax plates 1.0 and 1.5 mm in thickness. These materials were invested using a pre-arranged commercial phosphate-bonded investment for titanium. Three different types of casting machines were selected: 1) a pressure-type casting machine with separate melting and casting chambers, 2) a pressure-type casting machine with one chamber and 3) a centrifugal-type casting machine at 3000 rpm. Pure titanium (> 99.5%) was cast into the molds at a mold temperature of 100 degrees C. The castability of mesh pattern was evaluated in terms of the number of cast segment, and the cast plate was evaluated using X-ray transparent images by a digital imaging technique. The centrifugal casting method showed the best castability among these three casting methods.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Takahashi J,Zhang JZ,Okazaki Mdoi
10.4012/dmj.12.245subject
Has Abstractpub_date
1993-12-01 00:00:00pages
245-52issue
2eissn
0287-4547issn
1881-1361journal_volume
12pub_type
杂志文章abstract::The cream type of denture adhesives after use cannot be easily removed from oral mucosa and have the potential risk to change the oral flora. The effects of the temperature-responsive hydrogel Pluronic F-127 (PF) on the complex viscosity of denture adhesives were evaluated. Carboxy methylcellulose (CMC) mass fractions...
journal_title:Dental materials journal
pub_type: 杂志文章
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abstract::The purpose of this study was to establish a method using FTIR to evaluate the polymerization characteristics of UDMA-based resins. Three kinds of experimental UDMA-based resins were prepared with various molar fractions. IR spectra of the cured film specimens were measured with FTIR before and after extracting residu...
journal_title:Dental materials journal
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abstract::The aim of this study was to clarify the effect of heating rate on the development of both transient and residual stresses in investment molds. Solid, cylindrical, gypsum-based molds were modeled and theoretical calculations made of temperature distributions with a constant heating rate. These calculations used experi...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.15.121
更新日期:1996-12-01 00:00:00
abstract::Although titanium has been widely used in prosthetic appliances, such as cast removable partial denture frameworks, high quality castings are still difficult to obtain. This study proposes a new partition technique using a metal foil for improving castability of a two-chamber pressure casting unit. The metal foil was ...
journal_title:Dental materials journal
pub_type: 杂志文章
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abstract::Chemical mechanical polishing (CMP) of cpTi (Ti) was carried out using two types of slurries, acidic and basic colloidal silica containing H2O2 up to 3 wt%, to obtain flat and mirror-polished surfaces without any contaminated and reacted layers. Polishing behavior and surface properties were investigated using AFM, EP...
journal_title:Dental materials journal
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更新日期:2009-01-01 00:00:00
abstract::This in vitro study aimed to evaluate the effect of two different polymer-based CAD/CAM materials; resin-nano ceramic (Lava Ultimate [LVU]) and composite (CERASMART [CS]), their different surface pre-treatments, and use of different resin cements on the µTBS of adhesively bonded CAD/CAM onlays to dentin. CAD/CAM mater...
journal_title:Dental materials journal
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abstract::The aim of this study was to evaluate temperature changes in the pulp chamber during polymerization of four different pulp-capping materials using a LED-light-curing-unit in the contact and noncontact positions. A pulpal circulation mechanism was simulated to measure increases in temperature in four pulp-capping mater...
journal_title:Dental materials journal
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doi:10.4012/dmj.2013-274
更新日期:2014-01-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2016-303
更新日期:2017-07-26 00:00:00
abstract::This study compared differences in discoloration and dissolution in several titanium alloys with immersion in peroxide- or fluoride-containing solution. Commercially pure titanium (CP-Ti) and six titanium-based alloys were used: Ti-0.15Pd, Ti-6Al-4V, Ti-7Nb-6Al, Ti-55Ni, Ti-10Cu, and Ti-20Cr. Two test solutions were p...
journal_title:Dental materials journal
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更新日期:2008-01-01 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
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更新日期:2001-06-01 00:00:00
abstract::The aim of this study was to investigate the effect of three metal priming agents on the bond strength of adhesive resin cement to Silver-Zinc-Tin-Indium (Ag-Zn-Sn-In) alloy and pure Ag, Zn, Sn, and In. The specimens were air-abraded with alumina and then primed with one of three metal priming agents: V-Primer, Esteni...
journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:2018-03-30 00:00:00
abstract::The aim of this in vitro study was to evaluate the effects of desensitizer pre-treatment on in-office bleaching using an artificial discoloration tooth model. The stained specimens were divided into four groups (n=10); without application (Control group), Shield Force plus (SF group), UltraEz (UE group) and Teeth Mate...
journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:2019-10-02 00:00:00
abstract::Three commercially available porcelains bonded to titanium were evaluated to determine the weakest zone of the titanium-porcelain bonding structures. Tensile bond tests were performed for these specimens (NO, DU, and VI) and for Ni-Cr alloy-porcelain bonding samples that served as controls. The maximum bond strengths ...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-263
更新日期:2014-01-01 00:00:00
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journal_title:Dental materials journal
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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.2010-095
更新日期:2011-01-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章,评审
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更新日期:2000-06-01 00:00:00
abstract::With a view to understanding the structure-property relation of a silicone-based soft lining denture material after polymerization, its chemical composition and viscoelastic properties were investigated. Chemical compositions of the cured and uncured polymers of a commercial silicone permanent soft liner were determin...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00
abstract::The aim of this study was to develop and evaluate an automatic pH-cycling system, which was intended for performing time-lapse analyses of dental caries. Two single-section specimens prepared from each of the five extracted human incisors were studied under a condition of 3- or 9-cycles/day for seven weeks. Increase o...
journal_title:Dental materials journal
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journal_title:Dental materials journal
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journal_title:Dental materials journal
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journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:2011-01-01 00:00:00
abstract::Removable partial dentures (RPDs) with resin-clasp retentive parts, which are known as non-metal-clasp dentures (NMCDs), have been used as alternatives for conventional RPDs with metal clasp, in case of aesthetic prosthodontic treatments. In this study, a profilometer and dynamic micro-indentation tests were used to i...
journal_title:Dental materials journal
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更新日期:2018-11-30 00:00:00
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journal_title:Dental materials journal
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更新日期:2010-10-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-250
更新日期:2014-01-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:1998-12-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.28.307
更新日期:2009-05-01 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
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更新日期:2020-12-03 00:00:00