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HOME > Restor Dent Endod > Volume 28(5); 2003 > Article
Original Article Surface roughness of universal composites after polishing procedures
Jae-Yong Lee, Dong-Hoon Shin
2003;28(5):-377.
DOI: https://doi.org/10.5395/JKACD.2003.28.5.369
Published online: September 30, 2003

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Corresponding author (donyshin@dankook.ac.kr)

Copyright © 2003 Korean Academy of Conservative Dentistry

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  • The aim of this study was to evaluate the effect of two polishing methods and chemical conditioning on the surface of hybrid composites.
    Ninety cylindrical specimens (diameter: 8 mm, depth: 2 mm) were made with three hybrid composites - Filtek Z250, Tetric Ceram, DenFil. Specimens for each composite were randomly divided into three treatment subgroups - ① Mylar strip (no treatment), ② Sof-Lex XT system, ③ PoGo system. Average surface roughness(Ra) was taken using a surface profilometer at the time of setting and after immersion into 0.02N lactic acid for 1 week and 1 month. Representative specimens were examined by scanning electron microscopy. The data were analyzed using ANOVA and Scheffe's tests at 0.05% significance level.
    The results were as follows:
    1. Mylar strip resulted in smoother surface than PoGo and Sof-Lex system(p<0.001). Sof-Lex system gave the worst results.

    2. Tetric Ceram was smoother than DenFil and Z250 when cured under only mylar strip. However, it was significantly rougher than other materials when polished with PoGo system.

    3. All materials showed rough surface after storage in 0.02N lactic acid, except groups polished with a PoGo system.

    The PoGo system gave a superior polish than Sof-Lex system for the three composites. However, the correlation to clinical practice may be limited, since there are several processes, such as abrasive, fatigue, and corrosive mechanisms. Thus, further studies are needed for polishing technique under in vivo conditions.
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Fig. 1
Tracing length and sites of specimens.
jkacd-28-369-g001.jpg
Fig. 2
The overall roughness of the surface (Ra parameter) is defined as the arithmetical average value of all absolute distances of the roughness profile from the centerline within the measuring lenth.
jkacd-28-369-g002.jpg
Fig. 3
Surface roughness(Ra, µm)
jkacd-28-369-g003.jpg
Fig. 4
Filtek Z250 (no Tx., before immersion) (×150)
jkacd-28-369-g004.jpg
Fig. 5
Filtek Z250 (no Tx., 1 month) (×150)
jkacd-28-369-g005.jpg
Fig. 6
Filtek Z250 (Sof-Lex system, before immersion) (×150)
jkacd-28-369-g006.jpg
Fig. 7
Filtek Z250 (Sof-Lex system, 1 month) (×150)
jkacd-28-369-g007.jpg
Fig. 8
Filtek Z250 (PoGo system, before immersion) (×150)
jkacd-28-369-g008.jpg
Fig. 9
Filtek Z250 (PoGo system, 1 month) (×150)
jkacd-28-369-g009.jpg
Table 1
Composition and manufacturers of the composites evaluated

*Bis-GMA : bisphenol diglycidyl methacrylate

§UDMA : urethan dimethacrylate

Bis-EMA : bisphenol A polyetheylene glycol diether dimethacrylate

TEGDMA : triethylene glycol dimethacrylate

jkacd-28-369-i001.jpg
Table 2
Polishing kits tested
jkacd-28-369-i002.jpg
Table 3
Surface roughness (Ra) [Mean (S.D.)] (µm)
jkacd-28-369-i003.jpg
Table 4
Statistical significance when the polishing methods and materials, immersion times and materials combination were analyzed (2-way ANOVA).
jkacd-28-369-i004.jpg

Tables & Figures

REFERENCES

    Citations

    Citations to this article as recorded by  
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      Surface roughness of universal composites after polishing procedures
      J Korean Acad Conserv Dent. 2003;28(5):369-377.   Published online September 30, 2003
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    Figure
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    Surface roughness of universal composites after polishing procedures
    Image Image Image Image Image Image Image Image Image
    Fig. 1 Tracing length and sites of specimens.
    Fig. 2 The overall roughness of the surface (Ra parameter) is defined as the arithmetical average value of all absolute distances of the roughness profile from the centerline within the measuring lenth.
    Fig. 3 Surface roughness(Ra, µm)
    Fig. 4 Filtek Z250 (no Tx., before immersion) (×150)
    Fig. 5 Filtek Z250 (no Tx., 1 month) (×150)
    Fig. 6 Filtek Z250 (Sof-Lex system, before immersion) (×150)
    Fig. 7 Filtek Z250 (Sof-Lex system, 1 month) (×150)
    Fig. 8 Filtek Z250 (PoGo system, before immersion) (×150)
    Fig. 9 Filtek Z250 (PoGo system, 1 month) (×150)
    Surface roughness of universal composites after polishing procedures

    Composition and manufacturers of the composites evaluated

    *Bis-GMA : bisphenol diglycidyl methacrylate

    §UDMA : urethan dimethacrylate

    Bis-EMA : bisphenol A polyetheylene glycol diether dimethacrylate

    TEGDMA : triethylene glycol dimethacrylate

    Polishing kits tested

    Surface roughness (Ra) [Mean (S.D.)] (µm)

    Statistical significance when the polishing methods and materials, immersion times and materials combination were analyzed (2-way ANOVA).

    Table 1 Composition and manufacturers of the composites evaluated

    *Bis-GMA : bisphenol diglycidyl methacrylate

    §UDMA : urethan dimethacrylate

    Bis-EMA : bisphenol A polyetheylene glycol diether dimethacrylate

    TEGDMA : triethylene glycol dimethacrylate

    Table 2 Polishing kits tested

    Table 3 Surface roughness (Ra) [Mean (S.D.)] (µm)

    Table 4 Statistical significance when the polishing methods and materials, immersion times and materials combination were analyzed (2-way ANOVA).


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