Comparison of apical extrusion of sodium hypochlorite in immature teeth after needle irrigation, ultrasonic irrigation, EDDY, Er:YAG, and diode lasers

• Published in: Lasers in medical science 2022-12, Vol.38 (1), p.8, Article 8
• Main Authors: Karasu, Alparslan Eren, Goker Kamalı, Selin, Turkaydın, Dilek
• Format: Article
• Language: English
• Subjects: Color; Containers; Cresol; Dental Pulp Cavity; Dental roots; Dentistry; Extrusion; Humans; Irrigation; Lasers; Lasers, Semiconductor - therapeutic use; Lasers, Solid-State - therapeutic use; Lavage; Medicine; Medicine & Public Health; Optical Devices; Optics; Original Article; Photonics; Pixels; Plastics; Quantum Optics; Root Canal Irrigants; Root Canal Preparation; Semiconductor lasers; Sodium; Sodium Hypochlorite; Teeth; Therapeutic Irrigation; Ultrasonics; Vortices; YAG lasers
• ISSN: 1435-604X; 0268-8921; 1435-604X
• DOI: 10.1007/s10103-022-03683-0

This study aimed to assess the apical extrusion of sodium hypochlorite in immature teeth caused by needle irrigation, ultrasonic irrigation, EDDY, Er:YAG, and diode lasers. Seventy-five human maxillary anterior teeth were selected. After the apical 3 mm of the roots was resected, the canal lumen was enlarged with #2 to #5 Gates-Glidden burs. The teeth were fixed to the lid of a flat-sided clear plastic container, and the plastic containers were filled with 0.2% agarose gel containing 1 mL of 0.1% m-cresol purple. Then, the specimens were allocated into five groups according to the irrigation activation techniques: needle irrigation, ultrasonic irrigation, EDDY, Er:YAG laser, and diode laser. The apical extrusion of sodium hypochlorite caused the color change in the gel. The containers were digitally photographed, and the percentage of pixels of irrigant extrusion (the color change) in each photograph was calculated. The diode laser group showed a significantly lower percentage of pixels than needle irrigation, EDDY, and Er:YAG laser ( p