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KMID : 0362120010230010045
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Journal of Technologic Dentistry
2001 Volume.23 No. 1 p.45 ~ p.53
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The effect of vent on the marginal discrepancy of the PFM base metal castings
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Kim Tae-Suk
Lee Seong-Wook
Oh Sae-Yoon
Kim Woong-Chul
Kim Ji-Hwan
Yu Chin-Ho
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Abstract
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This study was performed to investigate the effect of vent on the marginal discrepancy of PFM base metal castings. Eighteen identical wax patterns of a maxillary 3 unit anterior bridge were fabricated. Nine cases out of them were vented with 2.5mm sprue wax, for direct comparison as to the marginal discrepancy of the castings with the other non vented 9 ones. The mean value of marginal discrepancies of the vented castings was , and that of the non vented was respectively. Statistical analysis revealed that marginal discrepancy of the vented casting was significantly reduced(p<0.05).
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KEYWORD
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Vent, Marginal discrepancy, PFN Base metal
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