Wandscher V F, Prochnow C, Rippe M P, Dorneles L S, Callegari G L, Baldissara P, Scotti R, Valandro L F
Oper Dent. 2017 Sep/Oct;42(5):E121-E133. doi: 10.2341/16-090-L.
To evaluate the effect of different methods of silica deposition on the intaglio surface of yttrium oxide stabilized zirconia polycrystal (Y-TZP) crowns on the retentive strength of the crowns.
One hundred simplified full-crown preparations produced from fiber-reinforced polymer material were scanned, and 100 Y-TZP crowns with occlusal retentions were milled. Crown/preparation assemblies were randomly allocated into five groups (n=20) according to the treatment of the intaglio surfaces: TBS = tribochemical silica coating via air-abrasion with 30-μm silica-coated alumina particles; GHF1 = application of thin glaze layer + hydrofluoric acid (HF) etching for 1 minute; GHF5 = glaze application + HF for 5 minutes; GHF15 = glaze application + HF for 15 minutes; NANO = silica nanofilm deposition (5 nm) via magnetron sputtering. All groups received a silane application. The surfaces of the preparations (polymer) were conditioned with 10% HF for 30 seconds and silanized. The crowns were cemented with resin cement, thermocycled (12,000 cycles; 5°C/55°C), stored for 60 days, and subjected to a retentive strength test (0.5 mm/min until failure). The retention data (MPa) were analyzed using one-way analysis of variance, Tukey tests, and Weibull analysis. Failures were classified as 50C (above 50% of cement in the crown) and 50S (above 50% of cement on the substrate).
The TBS (5.6±1.7 MPa) and NANO groups (5.5±1 MPa) had higher retentive strength than the other groups (p<0.0001) and had the highest values of characteristic strength. There was no difference in Weibull modulus, except for the GHF1 group (lower values). The TBS and GHF15 groups, respectively, had 60% and 70% of their failures classified as 50C, while most of the other groups had 50S failures.
Tribochemical silica coating and silica nanofilm deposition on the inner surface of zirconia crowns promoted a higher retentive strength.
评估不同二氧化硅沉积方法对氧化钇稳定四方多晶氧化锆（Y-TZP）全冠内表面与全冠固位强度的影响。
对100个由纤维增强聚合物材料制成的简化全冠预备体进行扫描，并制作100个带有咬合固位结构的Y-TZP全冠。根据内表面处理方式，将全冠/预备体组件随机分为五组（n = 20）：TBS组 = 通过用30μm二氧化硅涂层氧化铝颗粒进行气磨进行摩擦化学二氧化硅涂层处理；GHF1组 = 施加薄釉层 + 氢氟酸（HF）蚀刻1分钟；GHF5组 = 施加釉层 + HF蚀刻5分钟；GHF15组 = 施加釉层 + HF蚀刻15分钟；NANO组 = 通过磁控溅射沉积二氧化硅纳米膜（5nm）。所有组均进行硅烷处理。预备体（聚合物）表面用10% HF处理30秒并进行硅烷化处理。全冠用树脂水门汀粘固，进行热循环（12000次循环；5°C/55°C），储存60天，然后进行固位强度测试（以0.5mm/min的速度直至破坏）。使用单因素方差分析、Tukey检验和威布尔分析对固位数据（MPa）进行分析。破坏分为50C（全冠内水门汀超过50%）和50S（基牙上水门汀超过50%）。
TBS组（5.6±1.7MPa）和NANO组（5.5±1MPa）的固位强度高于其他组（p<0.0001），且特征强度值最高。除GHF1组（值较低）外，威布尔模量无差异。TBS组和GHF15组分别有60%和70%的破坏分类为50C，而其他大多数组为50S破坏。
在氧化锆全冠内表面进行摩擦化学二氧化硅涂层处理和二氧化硅纳米膜沉积可提高固位强度。
