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  • Title: Sealers and warm gutta-percha obturation techniques.
    Author: Camilleri J.
    Journal: J Endod; 2015 Jan; 41(1):72-8. PubMed ID: 25115660.
    Abstract:
    INTRODUCTION: Warm vertically compacted gutta-percha obturation techniques use root canal sealers that are heated during the obturation. This study aims at investigating the suitability of selected sealers with warm gutta-percha obturation techniques. METHODS: The composition of an experimental sealer (Septodont; Saint Maur-des-Fosses, France), MTA Fillapex (Angelus, Londrina, Brazil), Apexit Plus (Ivoclar, Schaan, Lichtenstein), and AH Plus (Dentsply International, Addlestone, UK) was assessed by scanning electron microscopic and energy-dispersive spectroscopic analysis. The effect of temperature during warm vertical compaction technique was investigated by testing the sealers' properties after 1 minute to 100°C or 37°C. The reaction products after setting were assessed by X-ray diffraction analysis and Fourier transform infrared spectroscopy. Changes in setting time, flow, and film thickness were determined using ISO 6876 (2012) specifications. RESULTS: The experimental tricalcium silicate-based sealer and Apexit Plus contained calcium hydroxide peaks after setting, which were absent in MTA Fillapex. The properties of AH Plus and the experimental sealer were modified by heat; the setting time was reduced, and film thickness increased. AH Plus had diminished N-H groups when heated to 100°C for 1 minute. MTA Fillapex, Septodont sealer, and Apexit Plus were unaffected by heat application. CONCLUSIONS: The choice of sealer should be considered when selecting the obturation technique. The Septodont sealer is recommended for obturations using cold laterally condensed gutta-percha, whereas MTA Fillapex and Apexit Plus were suitable with warm gutta-percha obturation techniques.
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