Surface hardness and flexural strength of dual-cured bulk-fill restorative materials after solvent storage

BMC Oral Health

Research

Bashayer Alzahrani¹  Wedad Awliya¹  Abdulrahman Alshabib¹ 

[1] Department of Restorative Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia;

关键词: Dual-cured;    Bulk-fill resin;    Surface hardness;    Flexural strength;    Solvent storage;   

DOI  :  10.1186/s12903-023-03047-2

 received in 2023-03-25, accepted in 2023-05-15,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundThis study aimed to evaluate the surface hardness (VHN) and biaxial flexural strength (BFS) of dual-cured bulk-fill restorative materials after solvent storage.MethodsTwo dual-cured bulk-fill composites (Surefil One® and Activa™ Bioactive), a light-cured bulk-fill composite (Filtek One Bulk-Fill) and a resin-modified glass ionomer (Fuji II LC) were investigated. Surefil One and Activa were used in the dual-cure mode, all materials were handled according to manufacturer’s instructions. For VHN determination, 12 specimens were prepared from each material and measured after 1 h (baseline), 1 d, 7 d and 30 d of storage in either water or 75% ethanol–water. For BFS test, 120 specimens were prepared (n = 30/material) and stored in water for either 1, 7 or 30 d before testing. Repeated measures MANOVA, two-way and one-way ANOVA followed by the Tukey post hoc test (p ≤ 0.05) were used to analyze the data.ResultsFiltek One had the highest VHN, while Activa had the lowest. All materials exhibited a significant increase in VHN after 1d of storage in water, except for Surefil One. After 30 d of storage, VHN increased significantly in water except for Activa, while ethanol storage caused a significant time-dependent reduction in all tested materials (p ≤ 0.05). Filtek One showed the highest BFS values (p ≤ 0.05). All the materials, except for Fuji II LC, exhibited no significant differences between 1 and 30 d BFS measurements (p > 0.05).ConclusionsDual-cured materials had significantly lower VHN and BFS compared to the light-cured bulk-fill material. The low results of Activa VHN and Surefil One BFS, indicate that these materials should not be recommended in posterior stress-bearing areas.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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