Ugurlu M
Department of Restorative Dentistry, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey.
Niger J Clin Pract. 2020 May;23(5):720-728. doi: 10.4103/njcp.njcp_591_19.
To evaluate the effects of surface coating and 1-year water aging on flexural strength, compressive strength (CS) and surface roughness of fluoride-releasing restorative materials.
The specimens were prepared from seven materials: GCP Glass Fill (GCP), Amalgomer CR (AHL), Zirconomer (Shofu), Fuji IX GP Capsule (GC), Beautifil II (Shofu), Estelite Σ Quick (Tokuyama), and reliaFIL LC (AHL). The specimens were randomly divided into two groups for each test: surface coated with G-Coat Plus (GC) and uncoated. Each group was subdivided into two groups stored in distilled water at 37°C for 24 h and 1 year before testing (n = 10). The flexural and CS were evaluated according to ISO standards on a universal testing machine. The surface roughness was assessed with AFM. After flexural strength test, a cross-section of the coated specimens was evaluated with SEM. Data were analyzed with one-way analysis of variance, Duncan and independent t-tests (P = 0.05).
After 24 h, a significant increase was observed on the flexural and CS of Amalgomer CR, Zirconomer, and Fuji IX GP by coating (P < 0.05). After 1 year, the coating increased the flexural strength of Amalgomer CR and Zirconomer, and CS of GCP Glass Fill (P < 0.05). The coating decreased the surface roughness of GCP Glass Fill, Amalgomer CR, and Zirconomer after 1 year (P < 0.05). The water aging decreased the mechanical properties of glass ionomer-based materials and increased their surface roughness (P < 0.05).
The mechanical properties and surface roughness of glass ionomer-based materials were affected by coating and water aging.
评估表面涂层和1年水老化对释氟修复材料的弯曲强度、抗压强度（CS）及表面粗糙度的影响。
用七种材料制备标本：GCP玻璃填料（GCP）、Amalgomer CR（AHL）、Zirconomer（松风）、富士IX GP胶囊（GC）、Beautifil II（松风）、Estelite Σ Quick（德山）和reliafil LC（AHL）。每个测试的标本随机分为两组：用G-Coat Plus（GC）表面涂层和未涂层。每组再细分为两组，在测试前分别于37°C蒸馏水中保存24小时和1年（n = 10）。根据ISO标准在万能试验机上评估弯曲强度和抗压强度。用原子力显微镜评估表面粗糙度。弯曲强度测试后，用扫描电子显微镜评估涂层标本的横截面。数据采用单因素方差分析、邓肯检验和独立t检验进行分析（P = 0.05）。
24小时后，涂层使Amalgomer CR、Zirconomer和富士IX GP的弯曲强度和抗压强度显著增加（P < 0.05）。1年后，涂层提高了Amalgomer CR和Zirconomer的弯曲强度以及GCP玻璃填料的抗压强度（P < 0.05）。1年后，涂层降低了GCP玻璃填料、Amalgomer CR和Zirconomer的表面粗糙度（P < 0.05）。水老化降低了玻璃离子体基材料的力学性能并增加了其表面粗糙度（P < 0.05）。
玻璃离子体基材料的力学性能和表面粗糙度受涂层和水老化的影响。
