ArticleClinical and experimental dental research2026
A Novel Ultrasonic Welding-Assisted Thermoplastic Root Canal Obturation Technique: An Ex Vivo Proof-of-Concept Study.
Article in Clinical and experimental dental research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesTo evaluate the effectiveness of an ultrasonic welding (USW)-assisted thermoplastic obturation technique for improving root canal sealing, void reduction, and lateral canal penetration.
methodsA 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.
resultsCompared 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.
conclusionsThe 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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