SEM/EDS evaluation of porcelain adherence to gold-coated cast titanium
SEM/EDS evaluation of porcelain adherence to gold-coated cast titanium
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DOI：
10.1002/jbm.b.20017
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发表时间：
2004-02-15
影响因子：
3.4
通讯作者：
Okabe, T
中科院分区：
文献类型：
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作者：
Lee, KM;Cai, Z;Okabe, T
钛与牙科瓷之间的粘结与瓷烧成过程中氧向钛铸件表面形成的反应层扩散有关。通过在钛表面涂覆一层薄薄的金层可以抑制氧的扩散。研究了镀金层对钛-陶瓷粘结性能的影响。将ASTM II级CP钛浇铸成氧化镁基包埋料(Slevest CB，Selec)。样品表面用110微米的氧化铝颗粒进行了空气研磨。在钛表面镀金的方法有三种：镀金糊(Deck Gold Nf，Degussa-Ney)涂覆，800℃烧成3次，一次镀金，烧成后溅射镀膜(40 mA，500 S)和溅射镀膜(40 mA，1000 S)。仅用空气磨损的氧化铝颗粒表面作为对照。将一种超低熔牙科烤瓷(VITA TANKERMIK，VIENTAL)粘接在钛表面。用扫描电子显微镜/能谱仪和X射线衍射仪对样品表面进行了表征。采用双向弯曲试验(N=8)评价钛-陶瓷粘附力，并用能谱仪测定粘附瓷的面积分数(AFAP)。数值结果用单因素方差分析和α=0.05的学生-纽曼-科尔斯检验进行统计分析。扫描电子显微镜断口分析显示，大量瓷器残留在镀金的钛表面。烧成后在镀金的钛表面发现了新的Au_2Ti相。显著更高(p
The adhesion between titanium and dental porcelain is related to the diffusion of oxygen to the reaction layer formed on cast-titanium surfaces during porcelain firing. The diffusion of oxygen could be suppressed by coating the titanium surface with a thin gold layer. This study characterized the effects of gold coating on titanium-ceramic adhesion. ASTM grade II CP titanium was cast into a MgO-based investment (Selevest CB, Selec). The specimen surfaces were air abraded with 110-mum Al2O3 particles. Gold coating was applied on titanium surfaces by three methods: gold-paste (Deck Gold NF, Degussa-Ney) coating and firing at 800 degreesC for three times, single gold-paste coating and firing followed by sputter coating (40 mA, 500 s), and sputter coating (40 mA, 1000 s). Surfaces only air abraded with Al2O3 particles were used as controls. An ultra-low-fusing dental porcelain (Vita Titankeramik, Vident) was fused on titanium surfaces. Specimen surfaces were characterized by SEM/EDS and XRD. The titanium-ceramic adhesion was evaluated by a biaxial flexure test (N = 8), and area fraction of adherent porcelain (AFAP) was determined by EDS. Numerical results were statistically analyzed by one-way ANOVA and the Student-Newman-Keuls test at alpha = 0.05. SEM fractography showed a substantial amount of porcelains remaining on the gold-sputter-coated titanium surfaces. A new Au2Ti phase was found on gold-coated titanium surface after the firing. Significantly higher (p