[Water retention and solubility of composite resins dependent on the mixing ratio or the irradiation time].
The deviations in the mixture ratio of 8 paste-paste-systems and 1 powder-fluid system with 50% and 100% each of both components were studied. The quality was examined in relation to the irradiation time with 7 photopolymer cured filling materials. The chemically initiated polymerization of filling material was altered so little by deviations in the mixture ratio that there was no general increase in water absorption. Six of the 9 cured filling materials however showed a significant increase in solubility. The 6 photopolymer cured filling materials tempered with ultraviolet light, in the area examined, showed no obvious alterations in water absorption; all others however with the shorter irradiation periods demonstrated a significant increase in solubility. Tempering of resin polymerized with light required disproportionately long irradiation periods. Water absorption and solubility were accordingly high for the short irradiation periods. The differences between the various materials are more striking than are the differences due to variations in processing.
D003188:Composite Resins / Q000528:radiation effects; D011108:Polymers; D012995:Solubility; D014466:Ultraviolet Rays; D014867:Water
D003188:Composite Resins; D011108:Polymers; D014867:Water
Wasseraufnahme und Löslichkeit von Füllungskunststoffen in Abhängigkeit vom Mischungsverhältnis bzw. von der Bestrahlungszeit.