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KMID : 0358920050320030557
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Journal of the Korean Academy of Pedodontics
2005 Volume.32 No. 3 p.557 ~ p.568
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WEAR AND CHEMICAL DEGRADATION OF ESTHETIC RESTORATIVE MATERIALS
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Yang Kyu-Ho
Choi Eun-Young
Choi Nam-Ki
Kim Seon-Mi
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Abstract
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The aim of this study was to evaluate the resistance to degradation and to compare the wear resistance characteristics of four esthetic restorative materials in an alkaline solution(0.1N NaOH).
The brands studied were MetafilCX(Sun medical, Japan) Solitaire 2(Heraeus Kulzer, USA), Composan LCM(Promedica, Germany), DenFil(Vericom, Korea).
The results were as follows:
1. The mass loss of each brand was 0.74~7.94% and highest value in Metafil(7.94±0.39%).
2. The sequence of the degree of degradation layer depth was in descending order by Metafil, Solitaire 2, DenFil, Composan LCM. There were significant differences between Metafil and the others(p＜0.05).
3. The sequence of the Si loss was in descending order by Metafil, Solitaire 2, Composan LCM, DenFil. There were significant differences among the materials(p＜0.05).
4. On SEM, destruction of bonding between matrix and filler and on CLSM, the depth of degradation layer of specimen surface was observed.
5. The sequence of maximum wear depth was in descending order by Metafil, Solitaire 2, Composan LCM and DenFil. There were significant differences among the materials(p＜0.05).
6. The correlation coefficient between Si loss and degradation layer depth (r=0.491, p＜0.05) and Vicker’s hardness number and maximum wear depth (r=-0.942, p＜0.05) were relatively high.
These results indicate that hydrolytic degradation and wear may consider as a evaluation factors of composite resins.
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KEYWORD
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Composite resin, Wear, Hydrolytic degradation
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