Year: 2025
Type: article
Abstract: Background: Enhancing the adaptation and durability of composite restorations remains a major challenge in modern adhesive dentistry.Recently, a new self-cured resin composite has gained attention with the potential to improve interfacial adaptation and reduce polymerization shrinkage stress, offering an alternative to conventional light-cured systems.Material and Methods: Sixteen freshly extracted human molars were prepared with standardized Class II cavities and randomly assigned to two groups (n=8).The first group was restored using a self-cure bulk-fill resin composite (Stela Automix, SDI Ltd., Australia) with its respective primer, while the second group received an injectable resin composite (G-aenial Universal Injectable, GC Corporation, Japan) with a universal adhesive.Restorative procedures followed manufacturers' instructions.The restorations were finished and polished, before being stored in distilled water at 37°C for six months to simulate aging conditions.After storage, specimens were sectioned longitudinally and analyzed using environmental scanning electron microscopy to evaluate internal adaptation, and interfacial gap measurements were recorded.Results: An independent Sample T-test showed a statistically significant difference in interfacial gap (IG%) between the two restorative systems, with the self-cure composite showing more favourable outcomes.For stela, the IG% was13.5±6.1 while for Injectable composite IG%=28.4±13.3.Conclusions: The Stela primer and composite used in this study demonstrated superior internal adaptation compared to the light-cured control, suggesting they could be a viable alternative, particularly for deep gingival margins or situations where light curing is inaccessible.
DOI: 10.4317/jced.62900
Authors: EH. Albelasy, AG. Raghip, HS. Ismail
Institutions: Mansoura University, Al Salam University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4412816877