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Year : 2019  |  Volume : 14  |  Issue : 2  |  Page : 57-61

Comparative study of diode lasers used for two time intervals for the treatment of teeth with vertical root fractures

Department of Restorative and Dental Materials, National Research Centre, Cairo, Egypt

Correspondence Address:
Maram E Khallaf
Department of Restorative and Dental Materials, National Research Centre, Dokki, Cairo, 12622
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jasmr.jasmr_12_19

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Background/aim Vertical root fracture treatment is considered a challenge in endodontics. And no single approach up till now gives satisfactory results. The present study aimed to compare the effect of a 970 nm diode laser in a continuous wave at different time intervals with a resin-based sealer or a resin-based sealer only on sealing of vertical root fractures of extracted teeth. Materials and methods Thirty upper single-rooted teeth were sectioned below the cement enamel junction. A groove of 5 mm length and 1 mm width was done at the root surface. Specimens were divided into three groups (10 each). Group 1 using sealer only, group 2 using a 970 nm diode laser irradiation at a power of 1.5 W at continuous mode for 60 s, and group 3 using a 970 nm diode laser irradiation at a power of 1.5 W and at continuous mode for 90 s. In groups group 2 and group 3, the root fracture line was filled with a sealer followed by diode laser irradiation and the gap size was examined by scanning electron microscopy. Temperature rise at the root surface was also measured using a temperature meter. Statistical analysis was carried out using one-way analysis of variance and the Tukey test (P<0.05). Results The statistical analysis showed that using laser with a 1.5 W/90 s group 3 showed the statistically least fracture gap (1.22 μm) while group 1 showed a gap of 8.57 μm and group 2 a gap of 2.44 μm. Conclusion The present study concluded that the application of a 970 nm diode laser at 90 s decreased the gap between the sealer and the root surface at the fracture line in extracted teeth.

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