Effect of temperature on the mass and color stability of additional photoinitiatorcontaining composite resins

Abstract

The purpose of this study was to evaluate how the temperature affects the stability of polymerized additional photoinitiator-containing composite resins. Five resin products were light-cured using a quartz-tungsten-halogen, and single and dual emission peaks lightemitting diodes. The degree of conversion (DC) and water sorption, solubility, and color change of the specimens were evaluated after immersion in the solutions of different temperatures (4, 37, and 60ºC) for 14 days. On the top surface, the light-curing units had no significant influence on DC of the tested specimens. On the bottom surface, the influence was inconsistent. As the solution temperature increased, water sorption also consistently increased in all specimens, whereas solubility changed inconsistently. Water sorption and solubility had a high linear correlation only at low temperature solution. Color change of the specimens was similar, mostly slight, and statistically inconsistent regardless of solution temperature. The restored composite resins are needed to avoid contact with hot solutions for durable dental restoration.

Discoloration of PMMA, composite, and PEEK

“…Furthermore, physiomechanical characteristics of the tested materials like water absorption, solubility and Martens hardness (HM) must also be considered. Another studies observed no correlations between these properties and the tendency to discoloration [46,47]. PEEK showed the lowest water absorption, solubility and HM values as compared to PMMA-based and composite resin materials.…”

Retentive Force of Glass-Ceramic Soldered Customized Zirconia Abutment Copings with Prefabricated Titanium Bases

“…One reason for this could be the increase in water absorption of the luting composite with rising temperatures, which is accompanied by swelling. However, the possibility of further polymerization caused by the application of heat and the greater stable cross-linking as a result is also being discussed [ 31 ].…”

A Review Of The Color Stability Of Resin Composites: The Etiology, Classification And The Treatment Of Composite Staining

“…Kompozit restorasyonların aşınması, yüzey bozunması ve su emilimleri, içeceklerdeki kimyasalların etkisi sonucu gerçekleşebilir ve bu da dış renklenme ile sonuçlanır. 31 Bu içeceklerin, kompozit materyallerin rengi ve mikro sertliği üzerindeki etkileri, kompozitin kimyasal bileşimine de bağlıdır. 16 Ren ve arkadaşları 32 …”

“…Sadece düşük sıcaklıktaki solüsyonlarda, su emilimi ve çözünebilirlik arasında doğru orantılı sonuçlar elde edilmiştir. 31 Güler ve arkadaşları 55 çayın renklenme üzerindeki etkilerini değerlendirdikleri araştırmalarında, şeker ilavesinin siyah çayın neden olduğu renklenmeyi arttırdığını bildirmişlerdir. Kahve ve çayın farklı yoğunluklara sahip sarı renk boyar maddeler içermeleri, kompozit materyallerin çay ve kahve ile neden renklendiklerini açıklayabilir.…”