Background

The knowledge of the electrochemical property (corrosion resistance) of beta titanium alloys compared to Ti-6Al-4 V for implants is relevant because of the potential cytotoxic effects that the released ions could cause to long-term health.

Objectives

The objective of this systematic review was to seek information on the electrochemical properties (corrosion resistance) of beta titanium alloys compared to Ti-6Al-4 V since the awareness of the electrochemical behavior of the implant surface in the medium is essential for the best indication of the alloys or compositional changes, which may promote benefits to bone-implant interaction in all areas that this procedure is required.

Methods

The PubMed, LILACS, COCHRANE Library, and Science Direct databases were electronically searched for the terms: dental implants AND beta-titanium AND Ti-6Al-4 V AND electrochemical technics. The inclusion criteria were research articles that studied beta-titanium compared to Ti-6Al-4 V using electrochemical techniques in electrolytes of chemical composition similar to body fluid, published in English, between 2000 and 2020. Articles that did not compare the corrosion resistance of these alloys in electrolytes similar to body fluids were excluded.

Results

A total of 189 articles were restored and selected by title and/or abstract according to the inclusion and exclusion criteria, which resulted in 15 articles that were reduced to 8 after read in full. The studies in vitro evaluated the corrosion resistance in electrolytes Hank, Ringer, SBF, and 0.9 % NaCl, between beta titanium alloys, obtained by arc fusion or bars stock, and Ti-6Al-4 V, for dental or biomedical implants submitted to surface treatments by heat treatment, plasma electrolytic oxidation (PEO), alkaline treatment, and thermomechanical.

Conclusion

The evaluated literature allowed to determine that 1) The oxides Nb₂O ₅, Ta₂O _5, and ZrO₂ have higher stability and protection quality than that of TiO₂ modified by the oxides of Al and V; 2) A higher modulus of elasticity of the Ti-6Al-4 V alloy favors protection against corrosion by maintaining a thicker and more firmly adhered oxide layer; 3) The increase in the thickness of the Ti alloys superficial layer contributes to the improvement of the corrosion resistance.

中文翻译：

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β 钛和 Ti-6Al-4V 合金之间的耐腐蚀性比较分析：系统评价。

背景

与用于植入物的 Ti-6Al-4 V 相比​​，β 钛合金的电化学特性（耐腐蚀性）的知识是相关的，因为释放的离子可能对长期健康造成潜在的细胞毒性作用。

目标

本系统评价的目的是寻求有关 β 钛合金与 Ti-6Al-4 V 相比​​的电化学性能（耐腐蚀性）的信息，因为了解植入物表面在介质中的电化学行为对于获得最佳适应症至关重要合金或成分的变化，这可能会在需要此程序的所有领域促进骨 - 植入物相互作用的益处。

方法

以电子方式在 PubMed、LILACS、COCHRANE 图书馆和 Science Direct 数据库中搜索以下术语：牙科植入物和 β-钛和 Ti-6Al-4 V 和电化学技术。纳入标准是在 2000 年至 2020 年间使用电化学技术在化学成分类似于体液的电解质中研究 β-钛与 Ti-6Al-4 V 的研究文章，以英文发表。电解质中类似于体液的这些合金被排除在外。

结果

根据纳入和排除标准恢复和/或按标题和/或摘要选择总共189篇文章，导致15篇文章在阅读全文后减少到8篇。体外研究评估了电解液 Hank、Ringer、SBF 和 0.9% NaCl 中的耐腐蚀性，在通过电弧熔合或棒料获得的 β 钛合金和 Ti-6Al-4 V 之间，用于提交到表面的牙科或生物医学植入物通过热处理、等离子电解氧化 (PEO)、碱处理和热机械处理。

结论

评价文献可以确定：1）氧化物Nb ₂ O ₅、Ta ₂ O ₅和ZrO ₂比Al和V氧化物改性的TiO ₂具有更高的稳定性和防护质量；2) Ti-6Al-4 V 合金较高的弹性模量有利于通过保持更厚和更牢固粘附的氧化层来防止腐蚀；3）钛合金表层厚度的增加有助于提高耐蚀性。