温度对两种热处理镍钛旋转仪表扭转性能的影响

Q2 Medicine
Roberto Barreto Osaki, C. Bramante, R. Vivan, M. Alcalde, P. Calefi, M. Duarte
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引用次数: 1

摘要

摘要本研究旨在评估温度对两种具有相同截面的蓝色和金色热处理的NiTi旋转仪器的扭转强度和角挠度的影响。共使用40台实验NiTi仪器(25.06,三角形截面,蓝色和金色热处理)。根据ISO 3630-1,在距仪器尖端3mm处进行扭转测试。扭转试验评估了在室温(21°C±1°C)和体温(36°C±1°C)下的扭转强度和角挠度到失效。利用扫描电子显微镜(SEM)观察了每个碎片的断裂表面。数据分析采用非配对t检验进行组间和组内比较,显著性水平设为5%。结果表明,与室温相比,体温对器械的扭转强度和角挠度没有影响(P < 0.05)。然而,在体温下,蓝色NiTi仪器的角度偏转明显低于金色NiTi仪器(P0.05)。温度对采用蓝金技术制造的仪器的抗扭强度没有影响。然而,在36°C温度下,蓝色NiTi仪器的角偏转明显低于金色仪器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of temperature on the torsional properties of two thermally treated NiTi rotary instruments
Abstract This study aimed to evaluate the influence of temperature on torsional strength and angular deflection of two experimental NiTi rotary instruments manufactured from Blue and Gold thermal treatments and with identical cross-sections. A total of 40 experimental NiTi instruments 25.06 and with a triangular cross-section and manufactured from Blue and Gold thermal treatments were used (n=20). The torsional test was performed in the 3 mm from the tip of the instrument according to ISO 3630-1. The torsional test evaluated the torsional strength and angular deflection to failure at room temperature (21°C ± 1° C) and body temperature (36°C ±1°C). The fractured surface of each fragment was observed by using scanning electron microscopy (SEM). Data were analyzed using an unpaired t test for inter and intra-group comparison and the level of significance was set at 5%. The results showed that the body temperature did not affect the torsional strength and angular deflection of the instruments when compared with room temperature (P>0.05). However, at body temperature, the Blue NiTi instruments presented significantly lower angular deflection in comparison with Gold NiTi instruments (P<0.05). There was no significant difference regarding the torsional strength of the instruments at body temperature (P>0.05). The temperature did not affect the torsional strength of the instruments manufactured from Blue and Gold technology. However, the Blue NiTi instruments presented significantly lower angular deflection than Gold instruments at 36°C temperature.
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来源期刊
Brazilian dental journal
Brazilian dental journal Dentistry-Dentistry (all)
CiteScore
2.20
自引率
0.00%
发文量
69
审稿时长
12 weeks
期刊介绍: Brazilian Dental Journal, publishes Full-Length Papers, Short Communications and Case Reports, dealing with dentistry or related disciplines and edited six times a year.
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