Variables Effecting Casting Accuracy of Quick Heating Casting Investments.

Takahashi, Hidekazu; Nakamura, Hideo; Iwasaki, Naohiko; Morita, N; Habu, Natsushi; Nishimura, Fumio

doi:10.5357/koubyou.61.242

Cited by 1 publication

(2 citation statements)

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“…Dimensional accuracy did not vary with heating method which was in agreement with previous reports 17,23,24) . The total expansion at the casting temperature calculated as a sum of setting expansion and thermal expansions is generally useful to predict dimensional accuracies.…”

Section: Discussionsupporting

confidence: 92%

“…Several researchers have reported that commercial investments for the quick heating method generally show a fast setting reaction, a relatively large setting expansion, and small thermal expansion; the other characteristics of these investments are similar to those of conventional investments [11][12][13][14][15][16] . Based on these evaluation results, the castings using the quick heating method are clinically acceptable [11][12][13][14]17) .…”

Section: Introductionmentioning

confidence: 99%

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Titanium Casting Using Commercial Phosphate-bonded Investments with Quick Heating Method

Yan

Takahashi

2006

Dent. Mater. J.

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The purpose of this study was to investigate the possible use of quick heating method for titanium casting using two commercial investments(Rematitan Plus and Tancovest). The resulting characteristics of the investments with the quick heating method were as follows: residual thermal expansion at the casting temperature was in the range of 0.39 to 0.64％; green strength and fired strength ranged from 4.4 to 10.3 MPa and from 13.8 to 17.6 MPa, respectively. Five full crown titanium castings from each casting condition were obtained using an argon arc melting and gas pressure casting machine. The thickness of cast surface reaction layer was approximately 200μm, regardless of heating methods or investments. Further, the heating method did not significantly influence either the accuracy or surface roughness of the titanium castings. These results therefore suggested that these commercial investments for titanium could be used for the quick heating method.

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Section: Discussionsupporting

confidence: 92%