HOME > Abstract
A STUDY ON THE BOND STRENGTH OF REINFORCED INDIRECT COMPOSITE RESINS TO DENTAL ALLOYS 강화형 간접복합레진과 치과용 합금의 결합강도에 관한 연구
Dong-Joo Yoon, Sang-Wan Shin, Ho-Nam Lim, Kyu-Won Suh
윤동주, 신상완, 임호남, 서규원

Indirect composite resins are used as an popular effective esthetic material in prosthetic den-
tistry, often with metallic substructure that provides support for restorations. Recently, new indi-
rect composite resins as a substitute of ceramic have been developed. These resins provide good
esthetics, with a wide range of hue and chroma. And the flexural strength of those is in the range
of 120-150MPa, which is higher than that of feldspathic ceramic, and similar to that of Dicor. Although
it has many merits, one of the major clinical problems of composite resins is the bond failure between
metal and resin due to insufficient interfacial bond strength. The purpose of this study was to eval-
uate shear bond strength of the reinforced indirect composite resin to dental alloys. Three different
composite resin systems(Artglass®, Sculpture®, Targis®) as test groups and ceramic(VMK 68®)
as control group were bonded to Ni-Cr-Be alloy(Rexillium III®) and gold alloy(Deva 4). All spec-
imens were stored at 37℃ distilled water for 24 hours and the half of specimens were thermocycled
2000 times at temperature from 5℃ to 60℃. The shear bond strengths of reinforced indirect com-
posite resins to dental alloys were measured by using the universal testing machine, and modes
of debonding were observed by stereoscope and scanning electron microscope.
The results were as follows :
1. The  shear  bond  strengths  of  reinforced  indirect  composite  resins  to  dental  alloys were
approximately half those of ceramic to dental alloys(P<0.01).
2. There was no significant difference between the shear bond strength of several reinforced indi-
rect composite resins to metal.
3. Alloy type did not affect on the shear bond strengths of resin to metal, but the shear bond strengths
of ceramic to gold alloys were higher than those of ceramic to Ni-Cr alloys(P<0.05).
4. The shear bond strengths of Artglass and Targis to gold alloys were significantly decreased after
thermocycling treatment(P<0.01).
5. Sculpture showed cohesive, adhesive, and mixed failure modes, but Artglass and Targis showed
adhesive or mixed failures. And ceramic showed cohesive and mixed failures.

* Keywords: Reinforced indirect composite resin, Shear bond strength, Thermocycling

* 주요단어: