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Published on: November 4, 2010
Contemporary bulk-fill restorative materials under simulated asthma inhalation therapy: a comparative assessment of
Tuğba Misilli1, Özge Gizem Yenidünya2, Enes Çelik2
1Department of Restorative Dentistry, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Çanakkale, 17100, Türkiye. dt.tugbay@outlook.com.
Objectives:
To compare the surface stability of four contemporary bulk-fill restorative materials following simulated 21-day antiasthmatic inhalation therapy, and to investigate the relationships among the resulting surface changes.
Materials And Methods:
One hundred ninety-two disc-shaped specimens (8 × 2 mm) were prepared from four bulk-fill restorative materials: a nanofilled composite (Filtek One Bulk), an alkasite (Cention Forte), a giomer (Beautifil-Bulk) and a self-cure composite (Stela Capsule) (n = 8 per subgroup). Specimens were exposed once daily for 21 days via nebulizer to budesonide, fluticasone, salbutamol, budesonide + salbutamol, or fluticasone + salbutamol, while the control specimens were stored in artificial saliva. Changes in color (ΔE00), gloss, microhardness and surface roughness were assessed relative to baseline. Data were analyzed using two-way ANOVA or Kruskal-Wallis tests and Spearman correlations (α = 0.05).
Results:
Restorative material and inhaler group significantly affected all four parameters (p < 0.05). Salbutamol caused significantly greater changes than budesonide, fluticasone and the control in every material; the combination regimens were intermediate, and budesonide and fluticasone generally did not differ. The self-cure composite was the least stable and the nanofilled composite the most stable (except for color); microhardness loss increased significantly in the order Filtek One Bulk < Beautifil-Bulk < Cention Forte < Stela Capsule. All four surface parameters were strongly and positively correlated (ρ = 0.79-0.94; p < 0.001).
Conclusions:
Simulated antiasthmatic inhaler exposure degraded the surface of all bulk-fill materials in a material-dependent manner, with salbutamol exerting the greatest effect. The nanofilled composite showed the highest resistance.
Clinical Relevance:
For asthmatic patients, and especially frequent salbutamol users, a highly filled light-cured nanofilled composite appears preferable to a self-cure bulk-fill composite where surface durability is clinically important.
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