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KMID : 0362419920300020233
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Journal of Korean Academy of Prosthodontics
1992 Volume.30 No. 2 p.233 ~ p.246
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DIMENSIONAL STABILTIY AND WETTABILITY OF RUBBER IMPRESSION MATERIALS
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Kang Choong-Hee
Vang Mong-Sook
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Abstract
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The purpose of this study was to evaluate the demensioal stability and wettability of several rubber impression materials.
Impressions were made from a metal master die machined to stimulate five full veneer crown preparations symmetrically placed in an arch from. Cast from impressions were measured about ; 1) intrapreparation distance 2) lower base diameter 3) length. For comparing materials were formed against a smooth surface. The advancing contact angle of a saturated aqueous solution of CaSO4 on the impression materials was measured after 1 minute. Mean contact angle were calculated and results were analyzed. @ES Results were as follows: @EN 1. As the intrapreparation distance, hydrophilic addition-cured silicone had the smallest change and condensation-cured silicone had the largest one. 2. As the lower base diameter, traditional addition-cured silicone had the smallest change and polyether had the largest one. 3. As the height, traditional addition-cured silicone had the smallest change and polyether had the largest one. 4. As the contact angle, polyether had the smallest change and condensation-cured silicone had the largest one.
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KEYWORD
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