Alternative Interpretations of Water Sorption Values of Composite Resins

Abstract

Water sorption values for direct filling resins and an unfilled resin were much more similar at 30 days when expressed as mg/g organic matrix than as mg/cm2 or weight percent. This interpretation is indicative of the water sorption characteristics of resin matrices. The values are even more indicative when solubility or leaching is taken into consideration. With the specimen sizes used in this study, the effect of the kinetics of water sorption could be minimized by using values obtained after immersion in water for 30 days.

Sorption and solubility of luting cements in different solutions

“…On filler pull-out, it is noteworthy that the hydrolytic stability of coupling agents also varies among the different fillers 25) . Some factors that influence solubility include filler concentration and mean particle size, the coupling agents, the nature of the filler particles 23) , and the type of solvent. In the present study, when ethanol:water solution was used as a storage medium, the solubility of Panavia F was higher than the other resin-based luting cements except Maxcem.…”

“…On the one hand, water will leach out unreacted monomers and other species 10,15,19) , contributing to shrinkage, loss in weight, and reduction of mechanical properties [19][20][21][22] . On the other hand, water sorption leads to a swelling of the material and an increase in weight [23][24][25][26] . The use of resin-based cements under restorations has been implicated in the subsequent fracture of the latter.…”

Surface Hardness of Resin Composites After Staining and Bleaching

“…13 Following polymerization, the inward movement of water molecules causes mobilization of ions within the matrix and outward movement of unreacted monomers, as well as the leaching out of ions from fillers and activators, which may cause softening of the resin matrix, reduction in stain resistance and leakage of filler elements. [14][15][16] Salivary enzymes, pH fluctuation, organic solvents and the ionic composition of food, beverages or saliva may influence the surface quality of dental resins. 17 One factor affecting the surface quality of resin composites is the finishing and polishing procedure.…”

Fi̇ber Post Si̇mantasyonunda Kullanilan Self-Adezi̇v Rezi̇n Si̇manlarin Mi̇krosizintilarinin Karşilaştirilmasi

“…Dişlerin üzerindeki eklentiler ve yumuşak doku artıkları periodontal küret yardımıyla temizlendi. Tüm dişler herhangi bir işlem uygulanmadan önce çatlak, kırık, abrazyon erozyon ve rezorpsiyon açısından 40 Bu test için pozitif kontrol amacıyla bir dişe genişletme işlemleri diğer örneklere olduğu gibi uygulandı ancak kanal içi boş bırakıldı. Örneklerin 4mm sinde güta perka bulunan apikal 5 mm lik kısımları sızdırma hakkında yanıltıcı bilgi vermemesi açısından su soğutması altında elmas frezlerle uzaklaştırıldı.…”