Izvorni znanstveni članak
Correlation Between Degree of Conversion and Light Transmission Through Resin Composite Samples
Zrinka Tarle
; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Andreja Meniga
; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Jozo Šutalo
; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
Quantitative analysis of residual double bonds or free radicals in the polymer network is the most reliable method for determining the degree of conversion. In this study, measurements of the degree of conversion and light transmission of three different composite resin materials and two different shades (the lightest and the darkest shades) were evaluated. The correlation between the measurements of the degree of conversion and light transmission was observed. Absorption and scattering by filler particles would continue the light attenuation through a composite resin specimen and consequentially reduce the degree of conversion. There is a dependence on the amount of filler loading and composite resin shade. The results confirmed the hybrid materials and lighter shades to provide higher conversion than the microfilled composite resins as well as darker and more opaque shade. It was also found that illumination by a curing unit of low output (230 mW/cm2) should be prolonged and gradual
increments should not exceed one mm.
Ključne riječi
composite resins; degree of conversion; light transmission
Hrčak ID:
99092
URI
Datum izdavanja:
15.3.1995.
Posjeta: 2.696 *