Effect of liquid rubber modification on shrinkage stresses and stress relaxation in dental composites
Fragment książki (Abstrakt)
MNiSW
0
brak dyscyplin
| Status: | |
| Warianty tytułu: |
Wpływ modyfikacji ciekłym kauczukiem na naprężenia skurczowe oraz relaksację naprężeń w kompozytach stomatologicznych
|
| Autorzy: | Pałka Krzysztof, Sowa Monika |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Strony: | 93 - 94 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | TAK |
| Nazwa konferencji: | XXVIII Sympozjum “Kompozyty – Teoria i Praktyka” |
| Skrócona nazwa konferencji: | XXVIII Symp. "Kompozyty - Teoria i Praktyka" |
| URL serii konferencji: | LINK |
| Termin konferencji: | 27 maja 2026 do 29 maja 2026 |
| Miasto konferencji: | Brenna |
| Państwo konferencji: | POLSKA |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Polymerization shrinkage is one of the main factors limiting the clinical performance and long-term durability of resin-based dental composites, as the stresses generated during curing are transferred to the tooth – restoration interface. Excessive stresses may result in marginal gap formation, microleakage, and the development of secondary caries. Our approach proposed to reduce this problem is the introduction of a liquid rubber into the composite system. The present study evaluates the effect of liquid rubber modification on shrinkage stress development in dental composites. To assess this influence, polymerization shrinkage, shrinkage stress, and flexural stress relaxation were experimentally investigated. The results showed that the incorporation of liquid rubber led to a noticeable decrease in shrinkage stresses, reaching 19% for the flowable composite and 14% for the conventional material. A reduction in polymerization shrinkage was also observed. The unmodified and modified flowable composites exhibited shrinkage values of 3.62% and 3.09%, respectively, while the conventional materials showed values of 2.74% and 1.94%. These findings are consistent with the results of stress relaxation measurements, which indicated a significantly lower fraction of unrelaxed stresses in the modified composites. The relative contribution of unrelaxed relative stresses was 0.523 and 0.347 for the unmodified and modified flowable materials, respectively, and 0.473 and 0.336 for the conventional composites. The obtained results suggest that the presence of liquid rubber enhances the viscoelastic response of the composite matrix, enabling more efficient stress relaxation and dissipation during and after polymerization. Consequently, such modification may contribute to improved durability and clinical performance of dental composite restorations. |
