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JournalISSN: 0286-5858

Journal of the Japanese Society for Dental Materials and Devices 

About: Journal of the Japanese Society for Dental Materials and Devices is an academic journal. The journal publishes majorly in the area(s): Dentin & Ultimate tensile strength. It has an ISSN identifier of 0286-5858. Over the lifetime, 181 publications have been published receiving 732 citations.

Papers published on a yearly basis

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Journal Article
TL;DR: The fracture toughness (KIC) of human enamel was examined by means of Indentation Microfracture Method (IM method), and a median crack occurred in the range of 2.45-5.88 N, and KIC was hardly affected by the difference of surface roughness.
Abstract: The fracture toughness (KIC) of human enamel was examined by means of Indentation Microfracture Method (IM method). The IM method was a simple, efficient and economical means to obtain KIC of human enamel. Judging from the relationship between load and crack size, a median crack occurred in the range of 2.45-5.88 N, and KIC was hardly affected by the difference of surface roughness. KIC of a 58-year-old man's teeth was 0.61 MPam1/2 in 1 and 0.77 MPam1/2 in 7 and the difference was significant (P less than 0.01). KIC differed much from the direction of the indenter pressed to enamel rods and the KIC of the direction of enamel rods axis I was markedly higher than that of others. In the 58-year-old man's 1, KIC was 0.61 MPam1/2 in the direction of enamel rods axis V, 0.66 MPam1/2 in the direction of H and 0.84 MPam1/2 in the direction of I, and the difference was significant (P less than 0.01). The values for a 10-year-old man's permanent teeth was slightly higher but showed a similar inclination to the 58-yer-old man's teeth.

25 citations

Journal Article
TL;DR: The cytotoxic effects of pure metals on L-929 mouse fibroblasts were examined using extracts obtained by dynamic extraction of Cu, Al, Ti, V, Cr, Mo, Mn, Fe, Co and Ni.
Abstract: The cytotoxic effects of pure metals on L-929 mouse fibroblasts were examined using extracts obtained by dynamic extraction of Cu, Al, Ti, V, Cr, Mo, Mn, Fe, Co and Ni. The order of cytotoxicity expressed in ppm was Cr greater than V greater than Co greater than Fe greater than Mn greater than Cu greater than Ni much greater than Mo. On the other hand, the order in mM was Cr greater than Co greater than V greater than Fe greater than Mn greater than Cu greater than Ni much greater than Mo. Al and Ti showed no cytotoxicity. Thus, the cytotoxicity of pure metals was dependent on their concentration and the chemical state in the extracts.

22 citations

Journal Article
TL;DR: Phenyl-P was the best adhesion promoting monomer among those studied monomers, which could not polymerize well enough to give good bond strength and could not make a stable resin reinforced dentin.
Abstract: Effect of adhesion promoting monomers dissolved in photocurable bonding agents on adhesion to ground dentin was investigated. They were MDP, Phosmer-M and 4-MET. The effect of those monomers was compared with that of Phenyl-P. The bonding agents contained campherquinone (CQ) as a photosensitizer, N-phenylglycine (NPG) as a reducing agent and TEGDMA as a base monomer. Phenyl-P was the best adhesion promoting monomer among those studied monomers. MDP could not polymerize well enough to give good bond strength. Phosmer-M could permeate through the smeared layer but could not make a stable resin reinforced dentin. 4-MET did not permeate through the smeared layer and did not adhere to ground dentin.

22 citations

Journal Article
TL;DR: An excellent durability of adhesion was obtained in the adhesion of 2% 4-META/MMA-TBB resin to dentin pretreated with EDTA 3-2 (NH4/Fe), and the cohesive failure in the resin was observed after the storage in water for a year.
Abstract: An excellent durability of adhesion was obtained in the adhesion of 2% 4-META/MMA-TBB resin to dentin pretreated with EDTA 3-2 (NH4/Fe). Such high bond strength as 15 MPa did not change for up to one year even when they were immersed in water at 37 degrees C. The resin reinforced dentin, a hybrid, was identified between dentin and the cured resin by TEM. The collagen and hydroxyapatite were encapsulated with the copolymer and the crystals were not removed by the demineralization with either HCl or electronic staining. Tensile fracture between the hybrid and dentin like the adhered samples to 10-3 treated dentin did not occur and the cohesive failure in the resin was observed here after the storage in water for a year. EDTA 3-2 (NH4/Fe) could not completely demineralize the hydroxyapatite especially at the deeper portion and the width of the demineralized dentin became thinner than 1 micron. The encapsulated crystals with the resin could improve the resistance of collagen against deterioration in water and such good bonding durability could be obtained.

18 citations

Journal Article
TL;DR: Cast titanium was ground with commercial vitrified wheels made of alumina abrasives, and their grinding performance was investigated; the manner in which the wheel was moved over the work during grinding was very important, compared with the silicon carbide wheels.
Abstract: Cast titanium was ground with commercial vitrified wheels made of alumina abrasives, and their grinding performance was investigated. For cutting, the appropriate circumferential speed of the alumina wheels was about 700 m/min. A speed lower or higher than this yielded unfavorable grinding results, which were attributed to wheel loading or chemical attrition of the abrasive, respectively. The hard wheel made of the A abrasive was suitable for grinding of titanium, and moreover, the wheel of the WA abrasive was more suitable than that made of the A abrasive. Generally, the cutting rate of the alumina wheels was inferior to that of the silicon carbide ones investigated previously. Depression of the wheel against the work yielded unfavorable grinding results; the manner in which the wheel was moved over the work during grinding was very important, compared with the silicon carbide wheels. Although the wheel was moved over the work, the high circumferential speed of the wheel resulted in chemical attrition of the abrasive and discoloration of the work surface, or grinding burn. The grinding burn layer mainly consisted of a few microns-thick titanium oxide.

17 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
199070
198956
198821
198434