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KMID : 0615219950200010337
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Journal of Kwangju Health
1995 Volume.20 No. 1 p.337 ~ p.344
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A study on defects of RPD metal framework with direct and indirect spruing
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임동천/Lim DC
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Abstract
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The purpose of this study was to determine defects of maxillary RPD(removable partial denture) with a variety of spruing arrangements and two directions of liquid metal feeding.
A factorial experimental design, three spruing methods, two metal feeding directions, and two different weights of metal were used to cast 60 Kennedy class Ⅱ modification 1 RPDs.
The results were as follows :
1. The RPD component examined had a significant influence of the occurrence of casting defects(P<0.001).
2. The interaction between weights of metal and spruing arrangements had a significant effect on the occurrence of casting defects(P<0.05).
3. Minimal metal weight could be used successfully to produce sound., RPD frameworks.
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KEYWORD
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