p. 1601−1609
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p. 1611−1615
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p. 1617−1625
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0.05) higher (54.77± 0.8 μm) than total etch cement (50.3± 5.88 μm).while related to internal adaptation, totally it was found that CAD group recorded statistically significant (P<0.05) higher internal gap mean value (87.45 ± 15.4 μm) than press group (36.64± 5.15 μm) and it was found that internal gap mean value of total etch cement was statistically significant (P<0.05) higher (67.24± 11.14 μm) than self-adhesive cement (56.85± 9.4 μm).Conclusion: Within the limitation of this study, The CAD group recorded statistically significant high vertical marginal fit than press group. The cement type has no effect on the marginal fit. The press group recorded statistically significant high internal fit than CAD group.]]>
p. 1627−1639
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p. 1641−1647
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p. 1649−1658
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p. 1659−1668
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p. 1669−1675
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p. 1677−1689
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p. 1691−1694
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p. 1695−1698
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p. 1699−1707
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p. 1709−1719
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p. 1721−1728
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p. 1729−1737
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non-heated resin mean value). Effect of heating of composite resin; totally it was found that heated composite resin affected marginal gap significantly (p=0.0284 < 0.05) where (non-heated resin mean value > heated resin mean value). Regardless to ceramic material groups, it was found that heated composite resin affected bond strength significantly (p=0.0141 < 0.05) as indicated by two way ANOVA test where (heated resin mean value > non-heated resin). Interaction between variables was not done coz the F value of ANOVA test showed non-significant interaction (p=0.2611>0.05)Conclusions: Heating of flowable composite resin as luting before cementation improve the flow characteristics of composite resin, increase the bond strength of occlusal veneers, and reduce the marginal gab.]]>
p. 1739−1752
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p. 1753−1760
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heated composite cement (ΔE) mean value = 4.53). Total effect of mechanical wear; irrespective of occlusal veneer material groups or composite resin cement heating, it was found that mechanical wear affected color stability non-significantly (p=0.5776> 0.05) as indicated three way ANOVA test where ( After aging (ΔE) mean value = 5.38 ≥ before aging (ΔE) mean value = 5.09) Conclusions: selection of the occlusal veneers materials should consider wear properties because the occlusal wear rate varies according to the materials of the occlusal veneers restoration and opposing surfaces as well as the applied load. Moreover, for best aesthetic results, clinicians must be taken in considerations the color, translucency of ceramics and the effects of the luting agent on optical properties.]]>
p. 1761−1781
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p. 1783−1791
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0.05).Conclusions: No statistical significant difference between the two groups means that the mechanical fatigue failure test showed high fracture resistance to cause failure of the ceramic shell.]]>
p. 1793−1800
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p. 1801−1818
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p. 1819−1826
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p. 1827−1831
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p. 1833−1841
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p. 1843−1852
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p. 1853−1859
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p. 1861−1869
2090-2360
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p. 1871−1876
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p. 1877−1890
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p. 1891−1901
2090-2360
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p. 1903−1911
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p. 1913−1922
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p. 1923−1930
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p. 1931−1938
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p. 1939−1953
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p. 1955−1964
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p. 1965−1971
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p. 1973−1981
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p. 1983−1993
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p. 1995−2005
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0.05). While there was a significant difference between different shades of the ceramics on its degree of conversion (P≤0.05). ceramics with the shade A3 showed lower degree of conversion than ceramics with the shade A1, and there was a significant differences between the two types of ceramic materials on the degree of conversion of resin cement with the lithium disilicate material showing a higher degree of conversion than the ultra-translucent zirconia (P≤0.05).Conclusion: Thicknesses up to 1.0 mm has no significant effect on the polymerization of resin cements, Lighter shades transmit more light to the underlying cement than darker ones, Lithium disilicate has higher translucency and allow more conversion of monomer to polymer in the underlying cement.]]>
p. 2007−2015
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p. 2017−2028
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p. 2029−2038
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p. 2039−2048
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p. 2049−2052
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p. 2053−2059
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p. 2061−2071
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p. 2073−2081
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p. 2083−2099
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p. 2101−2112
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p. 2113−2121
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p. 2123−2129
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