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KMID : 0362319990240010233
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Journal of Korean Academy of Operative Dentistry
1999 Volume.24 No. 1 p.233 ~ p.239
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A COMPARATIVE STUDY ON THE MECHANICAL PROPERTIES OF CEROMER, CERAMIC AND INDIRECT COMPOSITE RESIN
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Abstract
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Recently, a second generation composite resin system(ceromer) was introduced with
significantly improved mechanical properties.
The purpose of this study was to compare a ceromer with the other restorative
materials and to assess its clinical usefulness.
In this study, we used four restorative materials : amalgam (BESTALOY
), indirect composite resin (Clearfil CR Inlay ), ceromer
(Targis ) and ceramic (Vintage ).
And then we devided into four groups.
The materials of each group were as follows :
Amalgam group : BESTALOY (Dong Myung Dental Industrial Co.).
Composite Resin group : Clearfil CR Inlay (Kuraray).
Ceromer group : Targis Dentin (Ivoclar-Vivadent).
Ceramic group : Vintage (Shofu Inc.).
According to the above classification, we made samples through the polymerization of
BESTALOY , Clearfil CR Inlay and Targis
with separable cylindrical metal mold and firing of Vintage in a
investment mold.
And then, we measured and compared the value of compressive strength, diametral
tensile strength and Vicker's microhardness of each sample.
The results were as follows : 1. Amalgam showed the highest value of compressive
strength (390.37±42.22MPa) and the value of ceromer was somewhere between ceramic
and indirect composite resin. There were significant differences among the experimental
groups(p<0.001).
2. Indirect composite resin showed the highest value of diametral tensile strength
(74.21±15.33MPa) and there was no significant difference with ceromer. Ceromer was
higher diametral tensile strength than amalgam and ceramic (p<0.001).
3. Ceramic showed the highest value of microhardness (538.44±37.38Hv) and the value
of ceromer was somewhere between ceramic and indirect composite resin. There were
significant differences among the experimental groups(p<0.001).
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KEYWORD
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