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Analiza efektów cieplnych procesu polimeryzacji nowoczesnych materiałów stomatologicznych utwardzanych za pomocą różnych lamp diodowych

Dąbrowski M., Zaborowski P., Trzaskawka P.

Pomiary Automatyka Kontrola

2013

R. 59, nr 9

879--881

Celem badań było uzyskanie informacji na temat efektów cieplnych związanych z procesem polimeryzacji wybranych, nowoczesnych materiałów do wypełnień ubytków zębów. Do polimeryzacji próbek wykorzystano trzy lampy diodowe różnych producentów. Pomiary zmian temperatury w trakcie polimeryzacji wykonano za pomocą kamery termowizyjnej. Opracowane wyniki badań pozwoliły na uzyskanie informacji o właściwościach badanych materiałów oraz lamp, istotnych dla ich prawidłowego stosowania w praktyce stomatologicznej.

The paper deals with determination of thermal effects that occur during polymerization of dental filling materials. Three modern composite materials were tested and curing process was conducted using three LED lights from different manufacturers. Light parameters, important for the evaluation of thermal effects, were measured (Fig. 2, Tab. 1). The measurements were taken according to the previously developed and verified procedure [2, 3] on a test stand designed especially for that purpose (Fig. 1). During the tests the maximal temperature values, the polymerization time and the rate of temperature changes were determined for all the tested materials. The results are shown in Figs. 3-6. There are discussed the differences in thermal behavior between the tested materials as well as the behavior of the same type material but of different color when cured by various LED light types. The largest temperature rise of 17,5°C was observed for N`Durance® Cristal material cured by light C. The lowest temperature rise of 7,5°C was in turn observed for Filtek™ Z250 material cured by light A. Filtek materials cured by a light A exhibited the lowest temperature rise at the smallest rate. However, when cured by light B the significant thermal differences in polymerization process occurred for different material color. In the paper the authors point out the direct connection between physical properties of dental materials and their successful applications in tooth filling. The influence of the curing light type on the temperature rise in a polymerized material is also emphasized.

Określenie zmian temperatury wybranych materiałów stomatologicznych do wypełnień ubytków zębów w trakcie polimeryzacji

Dąbrowski M., Zaborowski P., Trzaskawka P., Bieszczad G.

Pomiary Automatyka Kontrola

2011

R. 57, nr 10

1177-1179

Celem badań było określenie wybranych właściwości fizycznych nowoczesnych materiałów do wypełnień ubytków zębów: Charisma, Valux Plus, Tetric EvoCeram w powiązaniu z procesem ich polimeryzacji. Pomiary wykonano za pomocą kamery termowizyjnej. W trakcie badań określono wartości wzrostu temperatury w trakcie polimeryzacji. Opracowane wyniki badań pozwoliły na porównanie cech użytych materiałów, istotnych dla ich właściwego stosowania.

The paper deals with the problem of determining physical properties of dental restorative materials. The authors investigated the properties of such materials during the polymerization process. The proven test method [3, 4] was applied to measure three modern dental materials. The following parameters of the polymerization process were determined: polymerization time, maximal temperature value and rate of temperature changes for each tested material. The authors describe the measurement stand (Fig. 1), the measurement method and the tested materials as well. The results include plots of the polymerization temperature as a function of time for all tested sample materials (Figs. 2-5). The differences between materials (and between different colours of the same material) are discussed. The biggest difference in the maximum temperature value (4,7°C) occurred between Charisma and Tetric Evo Ceram restorative materials. The latter one exhibits the lowest polymerization tem-perature and the lowest temperature rise rate. The colour-dependent differences were observed for Tetric Evo Ceram and Valux Plus dental materials. As conclusions, the authors pointed out the significant relation between the analyzed properties of dental restorative materials and their effective and long-lasting application to filling dental cavities.