Influence of powder type, power, angulation and duration in air-polishing on the surface properties of gingiva-colored composites
Year: 2025
Type: article
Abstract: BACKGROUND: This study evaluated the effects of air-polishing procedures using sodium bicarbonate, glycine, and erythritol powders on the surface microhardness and roughness of gingiva-colored composites (GCCs). METHODS: Sixty GCC discs were divided into 12 groups to investigate the differences in air polishing applications based on powder type (E = erythritol, S = sodium bicarbonate, G = glycine), power (F = Full, M = Medium), and angulation (45°; 90°). Surface microhardness and roughness were assessed at baseline (T0), 5 s (T1), and 10 s (T2). Statistical analyses included Independent Sample T-test, Mann-Whitney U test, ANOVA, and Kruskal-Wallis tests. RESULTS: EF45, EM90, SF45, SF90, SM90, and GF90 groups showed a significant decrease in hardness over time (p < 0.05). Erythritol exhibited greater hardness compared to sodium bicarbonate and glycine at T2 (p < 0.05). Surface roughness increased significantly in the majority of groups at T2 compared to both T0 and T1 (p < 0.05). EM45, EM90, SM90, and GM90 exhibited significantly higher roughness at T2 compared to both T0 and T1 (p < 0.05). Among the powders, sodium bicarbonate caused a higher increase in surface roughness under all conditions. CONCLUSION: Erythritol exhibited the lowest abrasive properties and resulting in lowest hardness loss and roughness increase on the GCC surface. Similarly, the medium power mode and 45° angle caused lower increase in surface hardness and roughness. Based on the tested parameters, if a patient has restorations with GCC, the airflow application protocol can be adjusted according to the findings of this study to achieve optimal results.
Source: BMC Oral Health
Institution: Sağlık Bilimleri Üniversitesi
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,190
OpenAlex ID: W4409488260