Y-TZP 全冠的固位强度：不同内表面二氧化硅涂层方法的比较

Retentive Strength of Y-TZP Crowns: Comparison of Different Silica Coating Methods on the Intaglio Surfaces.

作者信息

Wandscher V F, Prochnow C, Rippe M P, Dorneles L S, Callegari G L, Baldissara P, Scotti R, Valandro L F

出版信息

Oper Dent. 2017 Sep/Oct;42(5):E121-E133. doi: 10.2341/16-090-L.

DOI:10.2341/16-090-L

PMID:28829934

Abstract

OBJECTIVE

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.

METHODS

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).

RESULTS

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.

CONCLUSION

Tribochemical silica coating and silica nanofilm deposition on the inner surface of zirconia crowns promoted a higher retentive strength.

摘要

目的

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。

方法

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%）。