Influence of proper or reciprocating optimum torque reverse kinematics on cyclic fatigue of four single files

Q1 Medicine Journal of Investigative and Clinical Dentistry Pub Date : 2019-03-07 DOI:10.1111/jicd.12409

Eugenio Pedullà, Emanuele Ambu, Fabio Rovai, Seok-Woo Chang, Federico Campedelli, Giacomo Corsentino, Silvia Rapisarda, Giusy R. M. La Rosa, Simone Grandini

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引用次数: 3

Abstract

Aim

The aim of the present study was to evaluate the resistance to cyclic fatigue of heat-treated single files used in proper or in reciprocating optimum torque reverse motions.

Methods

Ninety-six HyFlex electrical discharge machining (EDM), Reciproc R25 (Rec), WaveOne Primary (WO), and WaveOne Gold (WOG) Primary were used. Resistance to cyclic fatigue was determined by recording time to fracture in a stainless steel artificial canal. Differential scanning calorimetric analysis was performed. Data were analyzed by two-way analysis of variance and Bonferroni post-hoc tests at 0.05.

Results

In both movements, HyFlex EDM showed higher time to fracture than other files (P < 0.0001). Rec showed higher time to fracture than WO (P < 0.0001), while WOG showed higher cyclic fatigue resistance than Rec and WO with both movements (P < 0.005).

Conclusions

Reciprocating optimum torque reverse motion improved significantly cyclic fatigue resistance of gold and controlled memory wire single files.

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适当或往复最佳转矩反向运动学对四单锉循环疲劳的影响

目的评价热处理单根锉在适当和往复最佳转矩反向运动下的抗循环疲劳性能。方法96例采用HyFlex电火花加工(EDM)、Reciproc R25 (Rec)、WaveOne Primary (WO)和WaveOne Gold (WOG) Primary。通过记录不锈钢人工管的断裂时间来测定其抗循环疲劳性能。差示扫描量热分析。数据分析采用双向方差分析和Bonferroni事后检验，0.05。结果在两种运动中，HyFlex EDM的骨折时间均高于其他锉(P <0.0001)。Rec的骨折时间明显高于WO (P <0.0001)，而在两种运动下，WOG的抗循环疲劳性能均高于Rec和WO (P <0.005)。结论往复最佳转矩反向运动可显著提高金丝和受控记忆丝单锉的抗循环疲劳性能。

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 Investigative and Clinical Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.90

自引率

0.00%

发文量

期刊介绍： Journal of Investigative and Clinical Dentistry (JICD) aims to publish quality, peer reviewed original research and topical reviews on all aspects of investigative and clinical dentistry and craniofacial research, including molecular studies related to oral health and disease. Although international in outlook, the Editor especially encourages papers from the Asia Pacific. The journal also aims to provide clinicians, scientists and students of dentistry with a knowledge transfer platform for rapid publication of reports through an international journal, which will be available free online until 2012. Its scope, therefore, is broad, inclusive and international, but with a particular focus on Asia Pacific. The Editor welcomes manuscripts in the following key thematic areas in oral and maxillofacial sciences: Community Dentistry and Oral Epidemiology, Conservative Dentistry, Dental Biomaterials, Dental Pedagogy, Endodontics and Traumatology, Implant Dentistry, Oral Biosciences, Oral and Maxillofacial Surgery, Oral Medicine, Oral Pathology and Oral Microbiology, Orthodontics, Oral Radiology, Oral Rehabilitation, Paedodontics, Periodontology and Periodontal Medicine.

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