A Novel Ultrasonic Welding-Assisted Thermoplastic Root Canal Obturation Technique: An Ex Vivo Proof-of-Concept Study.

IF 2.2 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical and Experimental Dental Research Pub Date : 2026-04-01 DOI:10.1002/cre2.70356

Mohammed Alshehri, Chaniotis Antonis, Hadi Alamri, Ahmad AlQahtani, Mohammed Altamimi

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引用次数: 0

Abstract

Objectives: To evaluate the effectiveness of an ultrasonic welding (USW)-assisted thermoplastic obturation technique for improving root canal sealing, void reduction, and lateral canal penetration.

Methods: A three-phase experimental approach was employed: (1) Customized gutta-percha points were developed, optimized to incorporate ultrasonic-responsive thermoplastic obturation cores; (2) in vitro testing was conducted using micro-computed tomography (CT) and infrared thermometry to assess lateral canal flow and thermal safety, respectively; and (3) an ultrasonic generator (28+ kHz), booster, and sonotrode were used to generate the heat required for obturation.

Results: Compared with traditional methods, the USW technique demonstrated a mean void reduction of 62% (95% CI: 58%-66%, p < 0.001), significant lateral canal penetration, and maintained temperatures safely below 45°C. No microfractures were observed in the treated teeth.

Conclusions: The USW-assisted obturation technique facilitates and enhances root canal obturation, reduces voids, and maintains tooth structural integrity through precise energy application combined with improved flow mechanics.

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一种新型超声焊接辅助热塑性根管封闭技术：离体概念验证研究。

目的：评价超声焊接（USW）辅助热塑性充填技术在改善根管密封、空隙缩小和侧根管渗透方面的有效性。方法：采用三相实验方法：(1)开发定制的杜仲胶点，并对其进行优化，以纳入超声响应热塑性封闭芯；(2)分别采用微计算机断层扫描（CT）和红外测温法进行体外测试，评估侧管流量和热安全性；(3)使用超声波发生器（28+ kHz）、助推器和声纳电极产生封闭所需的热量。结果：与传统方法相比，USW技术平均空隙减少62% （95% CI: 58%-66%）。结论：USW辅助充填技术通过精确的能量应用结合改进的流动力学，促进和增强根管充填，减少空隙，保持牙齿结构完整性。

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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来源期刊

Clinical and Experimental Dental Research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.30

自引率

5.60%

发文量

165

审稿时长

26 weeks

期刊介绍： Clinical and Experimental Dental Research aims to provide open access peer-reviewed publications of high scientific quality representing original clinical, diagnostic or experimental work within all disciplines and fields of oral medicine and dentistry. The scope of Clinical and Experimental Dental Research comprises original research material on the anatomy, physiology and pathology of oro-facial, oro-pharyngeal and maxillofacial tissues, and functions and dysfunctions within the stomatognathic system, and the epidemiology, aetiology, prevention, diagnosis, prognosis and therapy of diseases and conditions that have an effect on the homeostasis of the mouth, jaws, and closely associated structures, as well as the healing and regeneration and the clinical aspects of replacement of hard and soft tissues with biomaterials, and the rehabilitation of stomatognathic functions. Studies that bring new knowledge on how to advance health on the individual or public health levels, including interactions between oral and general health and ill-health are welcome.