Nascimento Oliveira Ana Lúcia, Elias Carlos Nelson, Salomão Dos Santos Heraldo Elias, Dos Santos Claudinei, de Biasi Ronaldo Sergio
Instituto Militar de Engenharia, Pr. General Tiburcio 80, Rio de Janeiro 22290-270, Brazil.
Universidade do Estado do Rio de Janeiro, Rodovia Presidente Dutra, km 298, Polo Industrial, Resende, Rio de Janeiro 27537-000, Brazil.
Int J Biomater. 2022 May 21;2022:1571729. doi: 10.1155/2022/1571729. eCollection 2022.
The objective was to evaluate the bending strength, phase transformation, roughness, and color stainability by coffee and red wine of opaque and high translucency yttria-stabilized zirconia before and after hydrothermal degradation in saline solution or oral mouthwash. Presintered zirconia blocks with medium opacity (ZrO-3 mol. % of YO) designed as ZrOp and high translucency zirconia (5.2 mol. % of YO) designed as ZrTrans were used. Specimens ( = 80/group) were cut and sintered at 1500°C for 2 h. The specimens were hydrothermally degraded in an autoclave (134°C-1.8 kg/cm) for 20 h in saline solution (0.5 g/L) and oral mouthwash solution (0.02% sodium fluoride, without alcohol and with 21.6% alcohol). After hydrothermal degradation, the samples were immersed in containers with coffee or red wine for 14 days to determine their color stainability. The results showed that the ZrOp had a higher bending strength than the ZrTrans before and after hydrothermal aging. In ZrOp and ZrTrans, the roughness increased after hydrothermal degradation. ZrOp samples had a higher Ra roughness than the ZrTrans samples. Roughness did not change after immersion in coffee or red wine. The X-ray diffraction (XRD) results showed that ZrOp samples underwent a tetragonal to monoclinic phase transformation, while ZrTrans samples were unchanged. Both ZrOp and ZrTrans samples changed color after immersion in coffee and red wine.
目的是评估在盐溶液或口腔漱口液中进行水热降解前后，不透明和高透明度氧化钇稳定氧化锆的弯曲强度、相变、粗糙度以及咖啡和红酒对其的染色性。使用了预烧结的中等不透明度氧化锆块（ZrO - 3摩尔%的YO，设计为ZrOp）和高透明度氧化锆（5.2摩尔%的YO，设计为ZrTrans）。将样本（每组 = 80个）切割并在1500°C下烧结2小时。样本在高压釜中（134°C - 1.8 kg/cm）于盐溶液（0.5 g/L）和口腔漱口液（0.02%氟化钠，无酒精和含21.6%酒精）中进行20小时的水热降解。水热降解后，将样本浸入装有咖啡或红酒的容器中14天以确定其染色性。结果表明，在水热老化前后，ZrOp的弯曲强度高于ZrTrans。在ZrOp和ZrTrans中，水热降解后粗糙度增加。ZrOp样本的Ra粗糙度高于ZrTrans样本。浸入咖啡或红酒后粗糙度没有变化。X射线衍射（XRD）结果表明，ZrOp样本经历了四方相向单斜相的转变，而ZrTrans样本未发生变化。ZrOp和ZrTrans样本在浸入咖啡和红酒后均发生了颜色变化。
