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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of surface contamination on adhesive bonding of cast pure titanium and Ti-6Al-4V alloy.
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Effect of surface contamination on adhesive bonding of cast pure titanium and Ti-6Al-4V alloy.

机译：表面污染对铸造纯钛和Ti-6Al-4V合金粘接的影响。

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STATEMENT OF PROBLEM: There is little information regarding bond strengths of resin cements to cast titanium surfaces contaminated by investment material. PURPOSE: This study examined the effect of surface contamination on the shear bond strength of resin cements to cast titanium and Ti-6Al-4V alloy. MATERIAL AND METHODS: Two types of disks were cast from commercially pure titanium (CP-Ti) and Ti-6Al-4V alloy ingots using an argon-arc pressure casting unit and a phosphate-bonded Al2 O3 /LiAlSiO6 investment. After casting, disks were subjected to 3 surface treatments: (1) cast surface sandblasted (50 microm-sized Al2 O3 ) for 30 seconds; (2) metal surface sanded with silicon-carbide paper (600 grit) after grinding the contaminated cast surface (approximately 200 microm in thickness); and (3) metal surface sandblasted for 30 seconds after treatment 2. Surface structures were examined after each treatment with SEM and optical microscopy. Each type of disk was then bonded with 2 types of luting materials. Bonded specimens were subjected to thermocycling for up to 50,000 cycles, and shear bond strengths were determined after 0 (baseline) and 50,000 thermocycles. Results were statistically analyzed with 3-way ANOVA (P <.05). RESULTS: Microscopic observation of cast CP-Ti and Ti-6Al-4V exhibited noticeable structures on the cast surfaces apparently contaminated with investment material. However, there were no statistical differences (P >.05) in the bond strengths of both cements between contaminated (treatment 1) and uncontaminated surfaces (treatment 3) for both metals at baseline and after 50,000 thermocycles. The bond strength of specimens sanded with silicon-carbide paper (treatment 2) deteriorated dramatically after 50,000 thermocycles. CONCLUSIONS: Contamination of the cast metal surfaces by elements of the investment during casting did not affect bond strengths of the luting materials to CP-Ti and Ti-6Al-4V.
机译：问题陈述：关于树脂水泥与被投资材料污染的铸造钛表面的粘结强度的信息很少。目的：本研究研究了表面污染对铸造钛和Ti-6Al-4V合金的树脂胶粘剂的剪切粘结强度的影响。材料和方法：使用氩弧压力铸造装置和磷酸盐结合的Al2 O3 / LiAlSiO6熔体，从商业纯钛（CP-Ti）和Ti-6Al-4V合金锭铸造两种类型的圆盘。铸造后，对圆盘进行3种表面处理：（1）铸件表面喷砂处理（50微米大小的Al2 O3）进行30秒; （2）在研磨受污染的铸件表面（厚度约200微米）后，用碳化硅纸（600粒度）打磨金属表面; （3）在处理2之后对金属表面进行喷砂处理30秒。在每次处理之后用SEM和光学显微镜检查表面结构。然后将每种类型的磁盘与2种类型的吸油材料粘合在一起。将粘合的样品进行热循环最多50,000个循环，并在0（基线）和50,000个热循环后确定剪切粘合强度。使用三效方差分析对结果进行统计分析（P <.05）。结果：对铸塑的CP-Ti和Ti-6Al-4V进行了显微镜观察，结果表明铸件表面明显被熔模材料污染。但是，在基线和50,000次热循环后，两种金属在被污染（处理1）和未污染表面（处理3）之间的两种水泥的粘结强度没有统计差异（P> .05）。经过50,000次热循环后，用碳化硅纸打磨的样品的粘结强度（处理2）急剧下降。结论：在铸造过程中，铸造元素对铸造金属表面的污染并不影响胶料与CP-Ti和Ti-6Al-4V的结合强度。

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