Silva Ana Carolina da, Ortiz Laura Patrícia Nadal, Alves Larissa Márcia Martins, Dapieve Kiara Serafini, Campos Tiago Moreira Bastos, Bottino Marco Antonio, Thim Gilmar Patrocínio, Valandro Luiz Felipe, Marinho Renata Marques de Melo
Universidade Estadual Paulista - Unesp, Institute of Science and Technology, Department of Dental Materials and Prosthodontics, São José dos Campos, SP, Brazil.
Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Prosthodontics and Periodontology, Bauru, SP, Brazil.
Braz Oral Res. 2024 Dec 9;38:e027. doi: 10.1590/1807-3107bor-2024.vol38.0027. eCollection 2024.
This study evaluated the effect of different occlusal surface finishes (glaze and silica glass infiltration) on surface characteristics and fatigue behavior of partially stabilized zirconia (PSZ) plates adhesively bonded onto epoxy resin discs. PSZ disc specimens (n = 15; Katana blocks STML, Kuraray Noritake Dental) were produced (Ø = 10 mm; thickness = 1.2 mm) and allocated into 3 groups: As sintered (S), silica glass infiltration (SGI), and glaze application (G). The PSZ intaglio surface was air-abraded with 50-µm alumina powder followed by bonding agent application. All produced PSZ were adhesively cemented onto dentin analogue discs made of epoxy resin material (Ø = 10 mm; thickness = 2 mm). Step stress fatigue test was performed (load ranging from 200 to 1800 N; step size 100 N and 10,000 cycles; 20 Hz). The topographic, microstructural, and fractographic analyses were performed by scanning electron microscopy. Results: No statistically significant difference in fatigue behavior was detected among the groups. All failures started at the bonding surface. Silica glass-infiltration and glaze layer application provided a smoothing effect, while the sintered group had a surface with grooves. The occlusal surface finishing method (silica glass infiltration or glazing) had no deleterious effect on fatigue behavior of adhesively bonded PSZ plates.
本研究评估了不同的咬合面处理（上釉和二氧化硅玻璃渗透）对粘结在环氧树脂圆盘上的部分稳定氧化锆（PSZ）板的表面特性和疲劳行为的影响。制备了PSZ圆盘试件（n = 15；Katana blocks STML，可乐丽诺瑞特牙科）（直径 = 10 mm；厚度 = 1.2 mm），并分为3组：烧结态（S）、二氧化硅玻璃渗透（SGI）和上釉（G）。PSZ凹面用50 µm氧化铝粉末进行空气喷砂处理，然后涂抹粘结剂。所有制备的PSZ都粘结在由环氧树脂材料制成的牙本质模拟圆盘上（直径 = 10 mm；厚度 = 2 mm）。进行了阶梯应力疲劳试验（载荷范围为200至1800 N；步长100 N，循环10000次；20 Hz）。通过扫描电子显微镜进行形貌、微观结构和断口分析。结果：各组之间未检测到疲劳行为的统计学显著差异。所有失效均始于粘结表面。二氧化硅玻璃渗透和釉层处理提供了平滑效果，而烧结组的表面有沟槽。咬合面处理方法（二氧化硅玻璃渗透或上釉）对粘结的PSZ板的疲劳行为没有有害影响。
