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

authors： Higashino Y,Yamauchi M,Goto T,Nagasawa T

更新日期：2003-12-01 00:00:00

abstract：:Ag-Pd-Cu-Au alloy was subjected to a Thermo-Mechanical Analyzer to investigate high temperature properties up to its liquidus temperature. Microstructural examination and elemental analysis with EPMA were also conducted in the solid/liquid mixture region. The following conclusions were obtained. (1) The solidus temper...

journal_title：Dental materials journal

authors： Nagasawa S,Yoshida T,Mizoguchi T,Terashima N,Ito M,Platt JA,Oshida Y

更新日期：2003-09-01 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

authors： Kadoma Y

更新日期：2003-09-01 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

authors： Maikuma Y,Usui K,Araki K,Mataki S,Kurosaki N,Furuya N

更新日期：2003-06-01 00:00:00

abstract：:The objective of this study is to develop a casting investment that prevents the blackening of the cast surface of noble metal alloys. The experimental investments were prepared using a gypsum-bonded investment in which the metallic powders such as boron (B), silicon (Si), aluminum (Al) and titanium (Ti) were added as...

journal_title：Dental materials journal

authors： Kakuta K,Nakai A,Goto S,Wakamatsu Y,Yara A,Miyagawa Y,Ogura H

更新日期：2003-03-01 00:00:00

abstract：:The depths of calcium-ion incorporation into a commercially pure titanium and an experimental beta-type titanium alloy were determined using Auger electron spectroscopy. After the electrochemical deposition of apatite, new compositional gradients appeared in the profiles in which the Ca and P concentrations gradually ...

journal_title：Dental materials journal

authors： Ban S,Kamiya A,Sonoda T

更新日期：2002-12-01 00:00:00

abstract：:Comparative studies on two-body sliding wear resistance were performed between a hybrid composite resin and conventional light-curing composite veneering materials. This study investigated the wear resistance of hybrid composite resins compared with three composite resin veneering materials for 12%Au-Ag-Pd alloy, the ...

journal_title：Dental materials journal

authors： Suese K,Kawazoe T

更新日期：2002-09-01 00:00:00

abstract：:The purpose of this study was to propose a new numerical modeling of the glass fiber cloth reinforced denture base resin (GFRP). The proposed model is constructed with an isotropic shell, beam and orthotropic shell elements representing the outmost resin, interlaminar resin and glass fiber cloth, respectively. The pro...

journal_title：Dental materials journal

authors： Tanimoto Y,Nishiwaki T,Nishiyama N,Nemoto K,Maekawa Z

更新日期：2002-06-01 00:00:00

abstract：:The effects of dissolved-oxygen concentration and fluoride concentration on the corrosion behaviors of commercial pure titanium, Ti-6Al-4V and Ti-6Al-7Nb alloys and experimentally produced Ti-0.2Pd and Ti-0.5Pt alloys were examined using the corrosion potential measurements. The amount of dissolved Ti was analyzed by ...

journal_title：Dental materials journal

authors： Nakagawa M,Matsuya S,Udoh K

更新日期：2002-06-01 00:00:00

abstract：:The purpose of this study was to investigate the effects of the location and orientation of dentinal tubules in the tooth on tensile strengths of the dentin. Dumbbell-shaped specimens of 12 groups from various locations and dentinal tubule orientations were prepared. The tensile test was performed in distilled water a...

journal_title：Dental materials journal

authors： Inoue T,Takahashi H,Nishimura F

更新日期：2002-03-01 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

authors： Ban S,Hasegawa J

更新日期：2001-12-01 00:00:00

abstract：:The bonding efficacy of sclerotic dentin was determined by measuring the polymerization contraction gap width of a commercial light-activated resin composite in a cervical defect and by measuring the micro-Vicker's hardness at the dentin adhesive surface; morphological characteristics were observed using a scanning el...

journal_title：Dental materials journal

authors： Tani C,Itoh K,Hisamitsu H,Wakumoto S

更新日期：2001-12-01 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

authors： Orbak R,Canakçi V,Tezel A

更新日期：2001-06-01 00:00:00

abstract：:Sixteen alloys and five pure metals were used and the open circuit potentials (OCP) and the coupled potentials with titanium were measured in five kinds of solutions. All alloys and metals showed the maximum OCP in 1.3% lactic acid solution, and the minimum in 0.01% sodium sulfide solution. The coupled potential depen...

journal_title：Dental materials journal

authors： Nakayama M,Ando N

更新日期：2001-03-01 00:00:00

abstract：:To elucidate the mechanism of dimensional changes in alginate impression in solutions, the relationship between the ion concentrations in three types of solutions (nonelectrolyte and monovalent and divalent metallic salts) and change in gel volume was examined. The gel in the monovalent metallic salt solution expanded...

journal_title：Dental materials journal

authors： Saitoh S,Araki Y,Kon R,Katsura H,Taira M

更新日期：2000-12-01 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

authors： Watanabe K,Okawa S,Kanatani M,Nakano S,Miyakawa O,Kobayashi M

更新日期：2000-09-01 00:00:00

abstract：:The purpose of this review is to summarise recent advances in the design and composition of bioactive surface layers of implantabile biomaterials, and thus the genetic potential of osteoprogenitor cells to recognize and respond to these diverse implanted biomaterials. Changes applied to a biomaterial's surface, in gen...

journal_title：Dental materials journal

authors： Letić-Gavrilović A,Scandurra R,Abe K

更新日期：2000-06-01 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

authors： Ukon S,Moroi H,Okimoto K,Fujita M,Ishikawa M,Terada Y,Satoh H

更新日期：2000-03-01 00:00:00

abstract：:The biaxial flexural strength and cyclic fatigue biaxial flexural strength of CAD/CAM ceramics polished with #220, 400, 600 and 1000 diamond pads were measured in an effort to determine the effect of surface roughness on fatigue behavior of dental ceramics. The surface roughness was improved after polishing with a sma...

journal_title：Dental materials journal

authors： Nakazato T,Takahashi H,Yamamoto M,Nishimura F,Kurosaki N

更新日期：1999-12-01 00:00:00

abstract：:The reinforcement mechanism of dentin mechanical properties by intracanal medicaments was investigated. The dumbbell-shaped specimens were prepared from a collagen sheet, demineralized dentin and organic dissolved dentin. After immersing the specimens in intracanal medicaments (eugenol and formocresol), the tensile te...

journal_title：Dental materials journal

authors： Nakano F,Takahashi H,Nishimura F

更新日期：1999-09-01 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

authors： Nomoto R,Hirasawa T

更新日期：1999-06-01 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

authors： Hikage S,Sato A,Suzuki S,Cox CF,Sakaguchi K

更新日期：1999-03-01 00:00:00

abstract：:The microstructure and homogeneity of three commercial dentin and incisal unfired porcelain frits (one conventional and two ultra-low fusing types, fused-to metal were analyzed by X-ray diffractometry, scanning electron microspectroscopy, and wavelength- and energy dispersive X-ray microspectroscopy. The average conte...

journal_title：Dental materials journal

authors： Ban S,Matsuo K,Mizutani N,Iwase H,Kani T,Hasegawa J

更新日期：1998-12-01 00:00:00

abstract：:The efficacy of four commercial and two experimental dentin bonding systems was examined by observing the cavity adaptation of commercial light-cured resin composites restored in the dogs scheduled to be sacrificed after a medical experiment. Before being sacrificed, a cylindrical class V cavity was prepared in each c...

journal_title：Dental materials journal

authors： Tani C,Itoh K,Ohba M,Tada K,Manabe A,Hisamitsu H,Wakumoto S

更新日期：1998-09-01 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

authors： Iijima M,Endo K,Ohno H,Mizoguchi I

更新日期：1998-03-01 00:00:00

abstract：:Glass-ceramic powders with the oxide batch formulation 50wt%SiO2, 20wt%P2O5 and 30wt%CaO were prepared by the sol-gel process using tetraethoxysilane, calcium nitrate and phosphoric acid as raw materials. The obtained gels and powders were characterized by TG-DTA thermal analysis, FTIR analyses and XRD measurements. T...

journal_title：Dental materials journal

authors： Taira M,Okazaki M,Takahashi J

更新日期：1997-12-01 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

authors： Nikaido T,Nakajima M,Higashi T,Kanemura N,Pereira PN,Tagami J

更新日期：1997-06-01 00:00:00

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

authors： Asaoka K,Tesk JA

更新日期：1996-12-01 00:00:00

abstract：:The possibility of the segregation under solidification process using a centrifugal casting machine was investigated using an electron probe microanalyzer with elemental distribution map, line analysis and quantitative analysis. When a very small quantity of platinum was added to local molten titanium during the casti...

journal_title：Dental materials journal

authors： Watanabe K,Okawa S,Kanatani M,Nakano S,Miyakawa O,Kobayashi M

更新日期：1996-12-01 00:00:00

abstract：:The mechanical properties of resin-modified "hybrid" glass-ionomers, for both restorative and liner/base applications, were assessed by a flexural test and compared with those of conventional acid-base glass-ionomers. Flexural strength, flexural modulus, and the modulus of resilience were determined 30 minutes after m...

journal_title：Dental materials journal

authors： Momoi Y,Hirosaki K,Kohno A,McCabe JF

更新日期：1995-12-01 00:00:00

abstract：:The effectiveness of a barbituric acid/copper (II) chloride initiator system in dentin was examined in terms of the effects of barbituric acid structures and dentin conditioners on bond strength. Curing times and tensile bond strengths to bovine dentin were measured for PMMA/MMA resins in conjunction with initiators c...

journal_title：Dental materials journal

authors： Suzuki A,Imai Y

更新日期：1995-12-01 00:00:00

abstract：:Application of a light-cured porcelain margin is a technique which has been developed recently. In this study, we compared the porcelain margin properties of the porcelain-light-cured resin matrix system and the traditional porcelain-water system, in terms of volumetric shrinkage, density, compressive strength, surfac...

journal_title：Dental materials journal

authors： Lu YS,Yang HW

更新日期：1995-06-01 00:00:00

abstract：:The depths of cure and the distributions of degree of conversion (DC), polymerization conversion (PC) and percent pendant double bonds (PDB) of light-cured composite resins cured under various intensities of light were investigated. When the total amount of exposure, represented by the product of the light intensity a...

journal_title：Dental materials journal

authors： Nomoto R,Uchida K,Hirasawa T

更新日期：1994-12-01 00:00:00

abstract：:Using a scanning electron microscope (SEM) and an electron probe surface roughness analyzer (ERA), we conducted the in vivo study of the effect of various filler components on the wear of composite resins. Experimental light-cured composite resins were prepared employing three different filler components; -(1) Silica ...

journal_title：Dental materials journal

authors： Sekiya K,Okamoto A,Fukushima M,Iwaku M

更新日期：1994-06-01 00:00:00

abstract：:The extent of polymerization of light-cured composite resins cured in relatively large class II cavities was estimated by measuring Knoop hardness on sectioned surfaces of resin restorations. The influences of the incremental placement technique, exposure time, and post-curing of resin inlay on the extent of polymeriz...

journal_title：Dental materials journal

authors： Hirabayashi S,Hood JA,Hirasawa T

更新日期：1993-12-01 00:00:00

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 w...

journal_title：Dental materials journal

authors： Takahashi J,Zhang JZ,Okazaki M

更新日期：1993-12-01 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

authors： Tanaka J,Inoue K,Masamura H,Matsumura K,Nakai H,Inoue K

更新日期：1993-06-01 00:00:00

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

authors： Nishimura F,Nakamura H,Watari F,Tanaka I,Takahashi H

更新日期：1992-12-01 00:00:00

abstract：:Seven types of amide monomers, methacryloyl tyrosine amide (MTYA), p-methacryloxybenzamide (p-MBA), p-methacryloxybutoxybenzamide (p-MBBA), o-methacryloxybutoxybenzamide (o-MBBA), p-methacryloxybutoxy phenylpropionamide (p-MBPPA), 3,5-dimethacryloxybenzamide (3,5-DMBA), and 3,5-di (methacryloxybutoxy)benzamide (3,5-DM...

journal_title：Dental materials journal

authors： Hayakawa T,Horie K

更新日期：1991-12-01 00:00:00

abstract：:Temperature dependencies of thermal expansion coefficients for the alloys of Pd-Ag, Pd-Cu and Pd-Co binary systems were measured at temperatures up to 900 degrees C, with heating and cooling rates of 5 degrees C/min. The coefficient of thermal expansion of alloys with no transformation in the temperature range of inte...

journal_title：Dental materials journal

authors： Asaoka K,Kuwayama N

更新日期：1990-06-01 00:00:00