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自调式锉、Protaper NEXT和Hyflex EDM预备后牙齿抗折性的比较评价：一项研究

Comparative Evaluation of Fracture Resistance of Teeth Instrumented by Self adjusting File, Protaper NEXT, and Hyflex EDM: An Study.

作者信息

Yashas D M, Basavanna R S, Kumar Nm Dhanya, Arya Aishwarya, Jain Poojitha, Adhaulia Ishaan

机构信息

Departmentt of Endodontics, Bapuji Dental College and Hospital, Davanagere, Karnataka, India.

College of Dental Sciences, Davangere, Karnataka, India.

出版信息

Contemp Clin Dent. 2025 Apr-Jun;16(2):111-116. doi: 10.4103/ccd.ccd_533_24. Epub 2025 Jul 14.

DOI:10.4103/ccd.ccd_533_24
PMID:40799224
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12338483/
Abstract

INTRODUCTION

The primary aim of endodontic treatment is to preserve the structural integrity of teeth while enhancing their resistance to fractures. Endodontically treated teeth are more susceptible to fractures due to the removal of tooth structure and radicular dentin. This study evaluates and compares the fracture resistance of teeth instrumented using three rotary file systems: self-adjusting file (SAF), ProTaper NEXT, and Hyflex EDM.

METHODOLOGY

Sixty extracted human mandibular premolars were randomly divided into four groups: Group I (control, uninstrumented), Group II (SAF), Group III (ProTaper NEXT), and Group IV (Hyflex EDM). Following instrumentation, root canals were obturated with gutta-percha and AH Plus sealer, except in the control group. Samples were embedded in acrylic resin, and fracture resistance was tested using a universal testing machine. Statistical analysis included analysis of variance and Tukey's tests to compare group differences.

RESULTS

The control group exhibited the highest fracture resistance (560.46 ± 125.0 N). Among the instrumented groups, SAF demonstrated the greatest fracture resistance (537.8 ± 126.3 N), followed by Hyflex EDM (440.7 ± 210.3 N), whereas ProTaper NEXT exhibited the lowest (379.93 ± 130.0 N). Significant differences were noted between groups ( < 0.001). SAF preserved dentinal integrity most effectively, whereas ProTaper NEXT induced more structural damage.

CONCLUSION

The SAF system, with its adaptive design and minimal dentin removal, was superior in preserving root strength. ProTaper NEXT, although efficient in shaping, increased fracture risk due to higher stress generation. Hyflex EDM offered intermediate outcomes, combining flexibility and reduced dentin damage.

摘要

引言

牙髓治疗的主要目的是在增强牙齿抗折性的同时保持其结构完整性。由于牙体组织和根管牙本质的去除，经过牙髓治疗的牙齿更容易发生骨折。本研究评估并比较了使用三种旋转锉系统（自调式锉（SAF）、ProTaper NEXT和Hyflex EDM）预备的牙齿的抗折性。

方法

60颗拔除的人下颌前磨牙随机分为四组：第一组（对照组，未预备）、第二组（SAF组）、第三组（ProTaper NEXT组）和第四组（Hyflex EDM组）。预备后，除对照组外，根管均用牙胶尖和AH Plus封闭剂充填。样本嵌入丙烯酸树脂中，使用万能试验机测试抗折性。统计分析包括方差分析和Tukey检验以比较组间差异。

结果

对照组表现出最高的抗折性（560.46±125.0 N）。在预备组中，SAF表现出最大的抗折性（537.8±126.3 N），其次是Hyflex EDM（440.7±210.3 N），而ProTaper NEXT表现最低（379.93±130.0 N）。组间差异显著（<0.001）。SAF最有效地保持了牙本质完整性，而ProTaper NEXT导致了更多的结构损伤。

结论

SAF系统具有适应性设计且牙本质去除最少，在保持牙根强度方面表现优异。ProTaper NEXT虽然在根管预备方面效率高，但由于产生较高应力而增加了骨折风险。Hyflex EDM提供了中等的结果，可以兼顾柔韧性和减少牙本质损伤。

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