用于改善 3Y-TZP 修复体表面效果的硼硅玻璃的机械和光学特性。

IF 1.5 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Brazilian oral research Pub Date : 2024-09-02 eCollection Date: 2024-01-01 DOI:10.1590/1807-3107bor-2024.vol38.0077
Ana Carolina da Silva, Camila da Silva Rodrigues, Juliana de Freitas Gouveia Silva, Clarice Ferreira Sabino, Gilmar Patrocínio Thim, Renata Marques de Melo Marinho, Tiago Moreira Bastos Campos
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引用次数: 0

摘要

硼硅酸盐玻璃作为传统釉料的替代品,可提高牙科氧化锆的机械性能和光滑度。本研究评估了涂有硼硅酸盐玻璃或商用釉料的 3 mol% 钇稳定四方氧化锆多晶体(3Y-TZP)的机械和光学特性。盘状 3Y-TZP 氧化锆试样(Zpex,东曹)在 1550°C 下烧结 2 小时。试样分为三组:原烧结(对照组,C)、商用釉(G)和硼硅酸盐玻璃(SL)。釉料和硼硅玻璃覆盖在氧化锆上,分别在 950°C 和 1200°C 煅烧 20 分钟。进行了双轴抗弯强度、断口图、X 射线衍射(XRD)、粗糙度(Ra 和 Rz)、断裂韧性(维氏压痕法)、色差(ΔE00)和半透明度(TP00)分析。数据分析采用 t 检验或单向方差分析和 Tukey 检验(α = 0.05)。挠曲强度数据进行了 Weibull 分析。SL 组的抗弯强度最高(1025.8 兆帕),而 C 组(859.41 兆帕)和 G 组(816.0 兆帕)的抗弯强度值相近。SL 组的特征强度也最高。所有组别的断裂源都在氧化锆表面。XRD 分析显示,SL 组的试样含有四方、立方和单斜三相。SL 组的表面粗糙度最低。SL 组的断裂韧性低于 C 组,但与 G 组相似。在 G 组和 SL 组中观察到的半透明度和颜色差异相似。硼硅玻璃增强了 3Y-TZP 的抗弯强度,使其表面最光滑,并表现出与釉类似的光学特性。
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Mechanical and optical properties of a borosilicate glass used to improve the finishing of 3Y-TZP restorations.

Borosilicate glass was developed to enhance the mechanical behavior and smoothness of dental zirconia as an alternative to conventional glaze. This study assessed the mechanical and optical properties of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) coated with borosilicate glass or a commercial glaze fired for an extended period of time. Disc-shaped 3Y-TZP zirconia specimens (Zpex, Tosoh) were sintered at 1550°C for 2 hours. The specimens were divided into three groups: as-sintered (control, C); commercial glaze (G); and borosilicate glass (SL). The glaze and borosilicate glass were applied over the zirconia and fired for 20 minutes at 950°C and 1200°C, respectively. Biaxial flexural strength, fractography, X-ray diffraction (XRD), roughness (Ra and Rz), fracture toughness (Vickers indentation method), color difference (∆E00), and translucency (TP00) analyses were conducted. The t-test or the one-way ANOVA and Tukey's tests were used to analyze the data (α = 0.05). Flexural strength data were subjected to the Weibull analysis. The SL group exhibited the highest flexural strength (1025.8 MPa), whereas the C (859.41 MPa) and G (816.0 MPa) groups exhibited similar values. The SL group also had the highest characteristic strength. The fracture origin in all groups was on the zirconia surface. XRD analysis revealed that the specimens from the SL group contained tetragonal, cubic, and monoclinic phases. The SL group presented the lowest surface roughness. Fracture toughness in the SL group was lower than in the C group, but similar to that observed in the G group. The translucency and color differences observed in the G and SL groups were similar. Borosilicate glass enhanced the flexural strength of 3Y-TZP, promoted the smoothest surface, and exhibited optical properties similar to those of the glaze.

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CiteScore
3.70
自引率
4.00%
发文量
107
审稿时长
12 weeks
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