Impact of Metallurgical Features on the Cyclic and Torsional Properties of Five Reciprocating Instruments Manufactured With Blue Thermal Treatment

IF 2.1 3区工程技术 Q2 ANATOMY & MORPHOLOGY Microscopy Research and Technique Pub Date : 2025-02-28 DOI:10.1002/jemt.24840

Abel Victor isidro Teves Cordova, Murilo Priori Alcalde, Rodrigo Ricci Vivan, Cesar Andre Zevallos Quiroz, Hubert Ponce Guzmán, Pedro Souza Calefi, Bruna Oliveira Pinto, Diego Rafael Nespeque Correa, Carlos Roberto Grandini, Marco Antonio Hungaro Duarte

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Abstract

This study evaluated the metallurgical and mechanical properties of five reciprocating instruments with blue thermal treatment. A total of 200 NiTi rotary instruments (25.08 and 40.06) were used: Reciproc Blue (RB), RC Blue (RCB), Only One File (OOF), Blue T (BT), and Rec Blue File (RBF). The cyclic fatigue test was performed in an artificial canal with a curvature angle of 60° and a curvature radius of 5 mm (n = 20). The time to fracture was recorded (TTF). The torsional test was performed to evaluate the maximum torsional strength and angular deflection of the instrument's tip (n = 20). Differential Scanning Calorimetry (DSC) and x-ray diffractometry (XRD) were used to assess the metallurgical features. ANOVA and Tukey tests were used for statistical comparison. The OOF 25.08 and 40.06 exhibited higher TTF than the other groups (p < 0.05). There was no significant difference among OOF, RBF, and RB 25.08 regarding the torsional strength (p > 0.05). RCB 40.06 had the lowest torsional strength (p > 0.05). DSC analysis indicated that OOF had higher austenite start and finishing temperatures. XRD analysis revealed that the 25.08 and 40.06 instruments of OOF had the highest peaks of the martensite phase. Variations in metallurgical phases and temperature transformations affected the mechanical properties of the instruments.

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冶金特征对五种蓝色热处理往复仪表循环和扭转性能的影响。

本研究评价了5种蓝色热处理往复仪表的冶金性能和力学性能。共使用了200个NiTi旋转器械（25.08和40.06）：Reciproc Blue （RB）、RC Blue （RCB）、Only One File （OOF）、Blue T （BT）和Rec Blue File （RBF）。循环疲劳试验在人工管中进行，弯曲角为60°，弯曲半径为5 mm （n = 20）。记录骨折时间（TTF）。进行扭转试验以评估仪器尖端的最大扭转强度和角挠度（n = 20）。采用差示扫描量热法（DSC）和x射线衍射法（XRD）对其金相特征进行了表征。统计学比较采用ANOVA和Tukey检验。OOF 25.08和40.06组TTF高于其他组（p 0.05）。RCB 40.06抗扭强度最低（p < 0.05）。DSC分析表明，OOF具有较高的奥氏体起始和结束温度。XRD分析表明，25.08和40.06样品的马氏体相峰最高。冶金相和温度变化的变化影响了仪器的机械性能。

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来源期刊

Microscopy Research and Technique 医学-解剖学与形态学

CiteScore

5.30

自引率

20.00%

发文量

233

审稿时长

4.7 months

期刊介绍： Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.