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HOME > Restor Dent Endod > Volume 28(4); 2003 > Article
Original Article A study of contraction shrinkage of composite resins and ormocers with various curing times
Yeon-Chung Chung, Kyung-San Min, Hae-Hyoung Lee, Kyung-Mo Cho, Yong-Bum Cho
2003;28(4):-333.
DOI: https://doi.org/10.5395/JKACD.2003.28.4.326
Published online: July 31, 2003

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Corresponding author (raindrop@dku.edu)

Copyright © 2003 Korean Academy of Conservative Dentistry

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  • Ormocer has organic-inorganic compound polymers. One of advantages of ormocer is reduced polymerization shrinkage. The purpose of this study was to compare the amount of contraction shrinkage of composite resins and ormocers. Additionally, the time of each material when there is no further change of contraction shrinkage was analysed.
    Four brands of composite resins (P-60, Surefil, Z-250 and Denfil) and two brands of ormocers (Definite and Admira) were used. 20 seconds, 40 seconds and 60 seconds of curing times were given. Contraction shrinkage of them were measured using a linometer for 80 seconds.
    The effect of material and curing time to contraction shrinkage at the time of 80 seconds was analysed by two-way ANOVA. The effect of time to contraction shrinkage was analysed by one-way ANOVA, and the time when there was no further change of the contraction shrinkage was analysed. The results are as follows :
    1. P-60, Definite, Z-250 and Denfil had no further change of contraction shrinkage from the time of 20 seconds, and Surefil and Admira had no further change of contraction shrinkage from the time of 10 seconds.

    2. Statistical analysis revealed volumetric shrinkage varied among material (p<0.05). No significant difference of contraction shrinkage among different curing times was found, and there was no effect of interaction between materials and curing times to contraction shrinkage.

    3. Definite and Admira showed the statistically same contraction shrinkage with those of Z-250 and P-60, which is higher than that of Surefil and lower than that of Denfil (p<0.05).

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Fig. 1
Diagram of Linometer
jkacd-28-326-g001.jpg
Fig. 2
Volumetric Contraction Shrinkage at Curing Time of 20 Seconds
jkacd-28-326-g002.jpg
Fig. 3
Volumetric Contraction Shrinkage at Curing Time of 40 Seconds
jkacd-28-326-g003.jpg
Fig. 4
Volumetric Conrtaction Shrinkage at Curing Time of 60 Seconds
jkacd-28-326-g004.jpg
Fig. 5
Volumetric Contraction Shrinkage of Various materials Regardless of Curing Times
jkacd-28-326-g005.jpg
Table 1
Experiment Materials
jkacd-28-326-i001.jpg
Table 2
Volumetric Contraction shrinkage after 80 Seconds with Various Curing Times

(%)

jkacd-28-326-i002.jpg
Table 3
Variance Analysis of Volumetric Contraction Shrinkage after 80 Seconds with Various Curing Times
jkacd-28-326-i003.jpg
Table 4
95% Scheffe Test of Volumetric Contraction Shrinkage of Various Materials (p<.05)
jkacd-28-326-i004.jpg
Table 5
Volumetric Contraction Shirinkage of Various Materials with Time (Standard Deviation) (%)
jkacd-28-326-i005.jpg

Tables & Figures

REFERENCES

    Citations

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      Composites Research.2015; 28(1): 6.     CrossRef

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      A study of contraction shrinkage of composite resins and ormocers with various curing times
      J Korean Acad Conserv Dent. 2003;28(4):326-333.   Published online July 31, 2003
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    Figure
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    A study of contraction shrinkage of composite resins and ormocers with various curing times
    Image Image Image Image Image
    Fig. 1 Diagram of Linometer
    Fig. 2 Volumetric Contraction Shrinkage at Curing Time of 20 Seconds
    Fig. 3 Volumetric Contraction Shrinkage at Curing Time of 40 Seconds
    Fig. 4 Volumetric Conrtaction Shrinkage at Curing Time of 60 Seconds
    Fig. 5 Volumetric Contraction Shrinkage of Various materials Regardless of Curing Times
    A study of contraction shrinkage of composite resins and ormocers with various curing times

    Experiment Materials

    Volumetric Contraction shrinkage after 80 Seconds with Various Curing Times

    (%)

    Variance Analysis of Volumetric Contraction Shrinkage after 80 Seconds with Various Curing Times

    95% Scheffe Test of Volumetric Contraction Shrinkage of Various Materials (p<.05)

    Volumetric Contraction Shirinkage of Various Materials with Time (Standard Deviation) (%)

    Table 1 Experiment Materials

    Table 2 Volumetric Contraction shrinkage after 80 Seconds with Various Curing Times

    (%)

    Table 3 Variance Analysis of Volumetric Contraction Shrinkage after 80 Seconds with Various Curing Times

    Table 4 95% Scheffe Test of Volumetric Contraction Shrinkage of Various Materials (p<.05)

    Table 5 Volumetric Contraction Shirinkage of Various Materials with Time (Standard Deviation) (%)


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