Effects of disinfection with a vinegar-hydrogen peroxide mixture on the surface composition and topography of a cobalt chromium alloy

IF 4.3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Prosthetic Dentistry Pub Date : 2024-11-01 DOI:10.1016/j.prosdent.2022.11.011

Gabriela Silveira Sakis DDS , Myriam Pereira Kapczinski DDS, MSc, PhD , Sara Fraga DDS, MSc, PhD , Cristiane Machado Mengatto DDS, MSc, PhD

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Abstract

Statement of problem

Choosing the best disinfection agent for removable partial dentures may be challenging since most commercially available disinfection solutions alter the properties of the metal framework.

Purpose

The purpose of this in vitro study was to analyze the changes in the surface topography and elemental composition of a cobalt chromium (Co-Cr) alloy when immersed in a vinegar-hydrogen peroxide mixture.

Material and methods

Disk-shaped specimens (N=50) were fabricated with Co-Cr alloy and randomly distributed into 5 groups (N=10) according to the immersion solutions: distilled water (control) (W); 0.5% sodium hypochlorite (H); 3% hydrogen peroxide and water in a 1:1 ratio (HP); vinegar and water in a 1:1 ratio (V); and vinegar and 3% hydrogen peroxide mixture in a 1:1 ratio (VHP). The immersions simulated 90 uses of 10 minutes each. The surface topography and the elemental composition were analyzed with scanning electron microscopy and energy-dispersive spectroscopy, before (T₀) and after (T₁) the immersions. The 2-way ANOVA for repeated measures was used for statistical comparisons (α=.05).

Results

The tested mixture (VHP) did not change the metal surface topography or increase the oxygen proportion, indicating that no corrosion occurred. Similarly, groups W, HP, and V had no topographic changes and nonsignificant statistical differences at T₁ for elemental composition (P>.05). However, the specimens immersed in sodium hypochlorite (H) showed staining, surface irregularity, composition change, with an appearance of 22.56% more oxygen, 41% less chromium, and 28.77% less cobalt at T₁ (P<.05).

Conclusions

The immersion of Co-Cr alloy in a vinegar-hydrogen peroxide mixture did not change the surface structure of the metal.

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用醋-过氧化氢混合物消毒对钴铬合金表面成分和形貌的影响。

目的：本体外研究的目的是分析钴铬（Co-Cr）合金浸泡在醋-过氧化氢混合物中时表面形貌和元素组成的变化：用 Co-Cr 合金制作盘形试样（N=50），并根据浸泡液随机分为 5 组（N=10）：蒸馏水（对照组）（W）；0.5% 次氯酸钠（H）；3% 过氧化氢和水以 1:1 的比例混合（HP）；醋和水以 1:1 的比例混合（V）；醋和 3% 过氧化氢以 1:1 的比例混合（VHP）。浸泡模拟 90 次，每次 10 分钟。在浸泡前（T0）和浸泡后（T1），用扫描电子显微镜和能量色散光谱分析了表面形貌和元素组成。采用重复测量的 2 方方差分析进行统计比较（α=.05）：受试混合物（VHP）没有改变金属表面的形貌，也没有增加氧气的比例，表明没有发生腐蚀。同样，W 组、HP 组和 V 组在 T1 阶段也没有发生形貌变化，元素组成的统计差异也不显著（P>.05）。然而，浸泡在次氯酸钠（H）中的试样出现了染色、表面不规则和成分变化，在 T1 时氧含量增加了 22.56%，铬含量减少了 41%，钴含量减少了 28.77%（PConclusions）：将 Co-Cr 合金浸泡在醋-过氧化氢混合物中不会改变金属的表面结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Prosthetic Dentistry 医学-牙科与口腔外科

CiteScore

7.00

自引率

13.00%

发文量

599

审稿时长

69 days

期刊介绍： The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.