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 formed beforehand to bring it in contact with the mold crucible wall so that no clearance was left behind it. Using this formed foil, the mold cavity can be completely isolated from the upper chamber and can be maintained in a vacuum even after the rupture of the foil. Accordingly, a large casting force is generated very quickly, and as a result, castability is expected to be significantly improved. This expectation was confirmed by the experiments using wax patterns including thin plate and mesh plate.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Watanabe K,Okawa S,Kanatani M,Nakano S,Miyakawa O,Kobayashi Mdoi
10.4012/dmj.19.307keywords:
subject
Has Abstractpub_date
2000-09-01 00:00:00pages
307-16issue
3eissn
0287-4547issn
1881-1361journal_volume
19pub_type
杂志文章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
pub_type: 杂志文章
doi:10.4012/dmj.2019-396
更新日期:2020-11-11 00:00:00
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
pub_type: 杂志文章
doi:10.4012/dmj.18.176
更新日期:1999-06-01 00:00:00
abstract::To evaluate the effect of a dentin adhesive on sclerotic dentin, contraction gap width and shear bond strength were measured. Dentin cavity wall was pretreated with an experimental dentin bonding system with and without a dentin primer, or with a commercial dentin bonding system. In the experimental dentin bonding gro...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.25.576
更新日期:2006-09-01 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
pub_type: 杂志文章
doi:10.4012/dmj.2018-012
更新日期:2018-11-30 00:00:00
abstract::Supercritical water was used as a modification method of electrochemically deposited apatite on pure titanium. The apatites were coated on a commercially pure titanium plate using a hydrothermal-electrochemical method. A constant direct current at 12.5 mA/cm2 was loaded for 1 hr at 25, 60, 100, 150 and 200 degrees C i...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.20.247
更新日期:2001-12-01 00:00:00
abstract::Mechanical responses of the test specimen under bidirectional and unidirectional loading were investigated using a newly developed masticatory simulator. The simulator adopted a four-bar linkage mechanism to create both loading patterns. Scratch/occlusal contact characteristics, contact force profiles and the fracture...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2016-198
更新日期:2016-01-01 00:00:00
abstract::To elucidate the cause of brittleness of porcelain fused to pure titanium (PFPT) which leads to chipping and cracking similar to that of conventional porcelain in clinical use, fracture toughness KIc, hardness (Hv and Hk) and fracture energy gamma reflecting the bonding energy of atoms were evaluated. In KIc there wer...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.22.532
更新日期:2003-12-01 00:00:00
abstract::The purpose of this study was to determine the bonding durability when a Megabond self-etching primer is used with 4-META/MMA-TBB resin to bond metal orthodontic brackets to human premolar enamel. Three conditions of enamel were prepared: Megabond self-etching primer without saliva contamination, Megabond self-etching...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.23.251
更新日期:2004-09-01 00:00:00
abstract::This study investigated the changes in hardness and Young's modulus of the transparent layer of dentin associated with aging and the carious process. Eighteen extracted human molars with or without coronal caries were used in this study. The normal teeth were divided into two groups by age, and the carious teeth were ...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.24.648
更新日期:2005-12-01 00:00:00
abstract::This study was to evaluate the load bearing capacity of monolithic dental zirconia crowns, and the effect of surface finishing on fracture strength. (1) The zirconia plates were divided into 5 groups and polished by various types of polishing bur, every specimen was analyzed by surface roughness testing, and X-ray dif...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2017-391
更新日期:2019-03-31 00:00:00
abstract::Effects of functionally gradient calcium phosphate consisting of hydroxyapatite (HAP) and alpha-tricalcium phosphate (alpha-TCP) on proliferation and differentiation of osteoblasts were evaluated using MC3T3-E1 cells. There were no significant differences in the proliferation of MC3T3-E1 cells among HAP-alpha-TCP func...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.24.207
更新日期:2005-06-01 00:00:00
abstract::This study was designed to evaluate the cytotoxicity of four dentin bonding agents and the effects of an antioxidant addition. Group A: G-aenial Bond, Group B: Optibond All in One, Group C: Gluma Self Etch and Group D: Clearfil S(3) Bond were added to the medium using extract method. The cells were cultured with or wi...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2015-079
更新日期:2015-01-01 00:00:00
abstract::The purpose of this study was to investigate the effect of remaining dentin thickness (RDT) and long term water storage on dentin bond strength in-vitro. Twenty-seven third molars were randomly divided into 3 groups: Clearfil Bond SE ONE (SE1, Kuraray Noritake Dental, Okayama, Japan), G-Bond plus (GB, GC, Tokyo, Japan...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2017-140
更新日期:2018-07-29 00:00:00
abstract::This study evaluated and compared the influence of different supporting abutment models on the fracture loads of three-unit fixed dental prostheses (FDPs) fabricated from the following materials (n=24/material): (i) IPS e.max CAD-on, (ii) IPS e.max ZirCAD, and (iii) Telio CAD. Twelve FDPs of each group were adhesively...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-344
更新日期:2014-01-01 00:00:00
abstract::The aim of the present study was to examine whether interconnected porous hydroxyapatite ceramics (IP-CHA) could be used as bone substitute for implant treatment in reconstructive surgery. We firstly assessed if surround of the titanium surface placed into granular or block-type IP-CHA can observe new bone formation i...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2012-169
更新日期:2013-01-01 00:00:00
abstract::This study aimed to evaluate the inhibitory effect of experimental pastes containing surface pre-reacted glass ionomer (S-PRG) fillers on enamel demineralization. Bovine blocks were treated twice a day for 4 days by 7 groups; experimental pastes containing 0-30 wt% S-PRG filler (S00, S01, S05, S10, and S30), deionized...
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
pub_type: 杂志文章
doi:10.4012/dmj.27.117
更新日期:2008-01-01 00:00:00
abstract::This study investigated the contrast ratio and grain size depending on sintering parameters of twelve different zirconia materials and compared with glass-ceramic (N=156, n=12 per group). Contrast ratio of all ceramics was measured using a spectrophotometer according to ISO 2471: 2008. Grain sizes of zirconia were det...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2014-056
更新日期:2014-01-01 00:00:00
abstract::The fluorescence and physical properties of thulium-doped zirconia were investigated. A standard grade of zirconia (TZ-3Y-E) and two translucent dental zirconia materials (Zpex and Zpex Smile) were examined. The specimens were prepared by addition of 0-1.5 wt% Tm2O3 and then sintering. When exposed to UV light, the Tm...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2017-384
更新日期:2018-11-30 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 purpose of this study was to examine the antibacterial activity of composite resin with glass-ionomer filler particles versus that of contemporary commercial composite resins. Three composite resins were used: Beautifil II (containing S-PRG filler), Clearfil AP-X, and Filtek Z250. Resin blocks were bonded to maxil...
journal_title:Dental materials journal
pub_type: 杂志文章,随机对照试验
doi:10.4012/dmj.2009-050
更新日期:2010-03-01 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
更新日期:1997-06-01 00:00:00
abstract::This research was conducted to investigate the bond strength between artificial teeth and a thermoplastic denture base resin for injection molding with different surface preparations for use in flexible resin removable partial dentures. Composite resin denture teeth and acrylic denture resin teeth were bonded to three...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2020-183
更新日期:2021-01-15 00:00:00
abstract::Present study evaluated effects of addition of Nanoparticles fluorapatite (Nano-FA) on microhardness and fluoride release of a Glass Ionomer Cement (GIC, Fuji IX GP Fast). Forty-eight specimens prepared, divided equally into 4 groups (2 with Nano-FA); after 24 h and one week Vickers microhardness (HV) was measured. Na...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2015-437
更新日期:2016-01-01 00:00:00
abstract::The aim of this study was to compare the shear bond strengths (SBS), failure modes (adhesive, cohesive, or mixed), and marginal microleakage occurrence of conventional resin (CR)-based, glass ionomer (GI)-based, and self-adhesive resin (SAR)-based fissure sealants with or without prior phosphoric acid (PA) etching. Fi...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-227
更新日期:2014-01-01 00:00:00
abstract::This study aimed to investigate the maximum depth imaging and optical properties of the dentin near the pulp by using optical coherence tomography (OCT) and to explore the possibility of measuring the remaining dentin thickness (RDT). Human third molars were used. In experiment 1, the cuspal dentin blocks (0.50-mm to ...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-303
更新日期:2014-01-01 00:00:00
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
doi:10.4012/dmj.2015-191
更新日期:2016-01-01 00:00:00
abstract::The aim of this study was to investigate the effects of potassium fluoride (KF) and sodium fluoride (NaF) in different concentrations on micro-shear bond strength (µSBS) and their protective effects against acid. The enamel blocks were treated with several concentrations of KF and NaF. For µSBS, Clearfil SE Bond 2 was...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2020-019
更新日期:2020-10-27 00:00:00
abstract::The corrosion behavior of three Ni-Ti alloys with compositions as commercial super-elastic orthodontic wires was investigated using polished plate specimens. Corrosion resistance was estimated by potentiodynamic polarization measurement in 0.9% NaCl and 1% lactic acid solutions and analysis of released metals by atomi...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.17.31
更新日期:1998-03-01 00:00:00
abstract::Multi-purpose bonding performance of three kinds of newly synthesized phosphonic acid monomers was investigated. Methacryloxyalkyl or acryloxyalkyl phosphonoacetates of 6-MHPA, 6-AHPA, 10-MDPA were synthesized in 42.8-51.9% yields with a light yellow viscous liquid, and identified as new compounds by 1H NMR, IR, and e...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.26.105
更新日期:2007-01-01 00:00:00