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KMID : 0371519920150000175
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Bulletin of Wonkwang Health College
1992 Volume.15 No. 0 p.175 ~ p.179
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The marginal fit of non-precious metal alloy used for crown and bridge prosthetics according to the sorts of investments.
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Abstract
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The purpose of this study was to commune the marginal fit of non-precious metal alloy used for crown and bridge prosthetics ac con] rg to 3 sorts of phosphate bonded investments such as Bio-vest, Washi-vest, Sternp.
Ninty copings were made and deviled into 18 gnxrps according to new to old metal mtics and 3 sorts of invest merits.
Each coping was seated on its working die and then the marginal gaps were measured under optical mx soope(x 50).
The obtained results could be summarized in the follows.
1. Having no relation to the sorts of investments, there were no significant distortion and surface roughness of casting bcdy.
2. There was no casting body meeting with ADA specification NO. 8. 25um.
3. H4enp investment of group 1 showed 50+32.53, which indicates the best marginal fit.
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KEYWORD
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