Porcelain adherence to dental cast CP titanium: effects of surface modifications
Porcelain adherence to dental cast CP titanium: effects of surface modifications
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DOI：
10.1016/s0142-9612(00)00263-5
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发表时间：
2001-05-01
期刊：
影响因子：
14
通讯作者：
Okabe, T
中科院分区：
文献类型：
--
作者：
Cai, Z;Bunce, N;Okabe, T
目的：钛熔体与包埋材料发生反应，在铸钛表面形成反应层。这样的一层可以防止钛和瓷器之间的强烈粘合。研究了表面改性对铸造钛表面及钛-陶瓷粘结力的影响。方法：将ASTM二级CP钛铸入氧化镁基模中。用氧化铝颗粒喷砂处理铸件，并在以下溶液中浸泡进行表面改性：(1)35%HNO3-5%HF在室温下浸泡1min；(2)50%NaOH-10%CuSO4。5H(2)O在105℃下放置10分钟；(3)NaOH-CuSO4溶液，然后是HNO3-HF溶液；(4)50%NaOH-10%NaSO4在105℃下放置10分钟；(5)NaOH-NaSO4溶液，然后是HNO3-HF溶液；以及(6)50%NaOH溶液，在105℃下放置10分钟。只用氧化铝喷砂的表面作为对照。用X射线衍射仪和扫描电子显微镜/能谱仪对试件表面进行了表征，并测定了硬度-深度分布。所有试件在烧瓷前都用110微米氧化铝颗粒喷砂。在钛表面熔合一层超低熔粘结瓷(Vita Tiankeramik)。结果：EDS分析显示，对照组和方法2、4、6试件表面有大量的铝(13~17wt%)，X射线衍射仪检测到钛表面和刚玉表面的残余应力，方法2、4和6试件。在经50%NaOH-10%CuSO4浸渍处理的钛表面上发现了新的Ti(Cu，Al)(2)相。5H(2)O水溶液。在方法1、3和5试件上观察到残余应力降低。在这些样品上没有检测到刚玉峰。与对照组相比，方法1-3和方法5在表面下20m处以及方法1-5在表面下50微米处的硬度值显著低于对照组(P<；0.05)。方法2-6的表面AFAP值显著高于对照组和方法1，而方法1-6之间以及对照组与方法1之间的AFAP值无显著差异。意义：根据本研究的结果，本研究中使用的苛性浴液可以改善铸造CP钛的瓷粘附力。2001爱思唯尔科学有限公司。版权所有。
Objectives: A reaction layer forms on cast titanium surfaces due to the reaction of the molten titanium with the investment material. Such a layer prevents strong adhesion between titanium and porcelain. This study characterized the effects of surface modifications on cast titanium surfaces and titanium-ceramic adhesion.Methods: ASTM grade II CP titanium was cast into an MgO-based mold. Castings were devested by sandblasting with alumina particles, and subjected to surface modification by immersion in one of the following solutions: (1) 35% HNO3-5% HF at room temperature for 1 min; (2) 50% NaOH-10% CuSO4 . 5H(2)O at 105 degreesC for 10 min; (3) the NaOH-CuSO4 solution followed by the HNO3-HF solution; (4) 50% NaOH-10% NaSO4 at 105 degreesC for 10 min; (5) the NaOH-NaSO4 solution followed by the HNO3-HF solution; and (6) 50% NaOH solution at 105 degreesC for 10 min. Surfaces only sandblasted with alumina were used as controls. Specimen surfaces were characterized by XRD and SEM/EDS, and hardness-depth profiles were determined. All specimens were sandblasted with 110 mum alumina particles before porcelain firing. An ultra-low-fusing porcelain (Vita Titankeramik) was fused on the titanium surfaces. The titanium-ceramic adhesion was characterized by a biaxial flexure test, and area fraction of adherent porcelain (AFAP) was determined by X-ray spectroscopy.Results: EDS analyses revealed a substantial amount (13-17 wt%) of Al on the control, and specimens modified with Methods 2, 4, and 6. XRD revealed residual stress in the titanium surfaces and corundum on the control, and Methods 2, 4, and 6 specimens. A new Ti(Cu, Al)(2) phase was identified on the titanium surfaces modified by immersion in 50% NaOH-10% CuSO4 . 5H(2)O aqueous solution. Reduced residual stress was observed on Method 1, 3, and 5 specimens. No corundum peaks wel e detected on these specimens. Compared to the control, significantly lower (P < 0.05) hardness values were found for Methods 1-3 and Method 5 specimens at 20 m below the surfaces and for Method 1-5 specimens at 50 mum below the surfaces. Significantly higher (P < 0.05) AFAP values were found for surfaces modified with Methods 2-6 compared to the control and Method 1, and no significant differences were found among Methods 1-6, and between control and Method 1.Significance: Based on the results from the present study, porcelain adherence to cast CP titanium can be improved by the caustic baths used in the study. 2001 Elsevier Science Ltd. All rights reserved.