Elemental composition, corrosion resistance and mechanical properties of computer-aided design and computer-aided manufacturing fixed retainers versus conventional fixed retainers

IF 1.9 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE Journal of oral science Pub Date : 2024-02-23 DOI:10.2334/josnusd.23-0303

Yasuhiro Namura, Helen Pullisaar, Heidi Vanessa Holm, Morten Syverud, Aida Mulic, Vaska Vandevska-Radunovic

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Abstract

Purpose: To investigate the elemental composition, corrosion resistance, and mechanical properties of computer-aided design and computer-aided manufacturing (CAD-CAM) retainers versus conventional fixed retainers (FRs).

Methods: Eight different retainer wires were investigated. Energy dispersive X-ray spectroscopy was used to determine the elemental composition. Leakage was analysed according to ISO 10271:2020 guidelines. Hardness was tested using the Vickers method with a load of 0.3 kg. The tensile force and tensile strength were evaluated. Multiple comparisons among wires of hardness, tensile force, and strength were conducted using the Welch t-test, with Bonferroni correction.

Results: Nickel was present in all wires. The CAD-CAM-FR wire, which contained more nickel than the other wires, had no measurable leakage. The gold-plated wires had the highest total leakage, but did not exceed the ISO standard limit. The hardness of the stainless-steel twisted wires was the highest and that of the CAD-CAM-FR wire was the lowest. The tensile strength of the CAD-CAM-FR wire was significantly lower than that of the other wires and similar to the other twisted-wire retainers.

Conclusion: The CAD-CAM-FR wire is likely to have high corrosion resistance and flexibility due to its low hardness.

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计算机辅助设计和计算机辅助制造固定卡环与传统固定卡环的元素组成、耐腐蚀性和机械性能比较

目的：研究计算机辅助设计和计算机辅助制造（CAD-CAM）保持器与传统固定保持器（FR）的元素组成、耐腐蚀性和机械性能：方法：研究了八种不同的固位体钢丝。采用能量色散 X 射线光谱法确定元素组成。根据 ISO 10271:2020 指南对渗漏进行分析。硬度测试采用维氏方法，载荷为 0.3 千克。对拉力和拉伸强度进行了评估。采用韦尔奇 t 检验法对钢丝的硬度、拉力和强度进行多重比较，并进行 Bonferroni 校正：所有钢丝中都含有镍。CAD-CAM-FR 焊丝比其他焊丝含更多的镍，但没有明显的渗漏。镀金金属丝的总泄漏量最高，但未超过 ISO 标准限值。不锈钢绞线的硬度最高，CAD-CAM-FR 线的硬度最低。CAD-CAM-FR 金属丝的抗拉强度明显低于其他金属丝，与其他扭转金属丝保持器相似：结论：CAD-CAM-FR 金属丝的硬度较低，因此可能具有较高的耐腐蚀性和柔韧性。

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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