Effects of radiation therapy on the dislocation resistance of root canal sealers applied to dentin and the sealer-dentin interface: a pilot study
Yaduka Pallavi, Kataki Rubi, Roy Debosmita, Das Lima, Goswami Shachindra,
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( Yaduka Pallavi ) - Regional Dental College Department of Conservative Dentistry and Endodontics
( Kataki Rubi ) - Regional Dental College Department of Conservative Dentistry and Endodontics
( Roy Debosmita ) - Regional Dental College Department of Conservative Dentistry and Endodontics
( Das Lima ) - Regional Dental College Department of Conservative Dentistry and Endodontics
( Goswami Shachindra ) - Dr. B Borooah Cancer Institute Department of Radiation Oncology
Abstract
Objectives: This study evaluated and compared the effects of radiation therapy on the dislocation resistance of AH Plus and BioRoot RCS applied to dentin and the sealer-dentin interface.
Materials and Methods: Thirty single-rooted teeth were randomly assigned to 2 groups (n = 15 each): AH Plus (Dentsply DeTrey) and BioRoot RCS (Septodont). Each group was subdivided into control and experimental groups. The experimental group was subjected to a total radiation dose of 60 Gy. The root canals of all samples were cleaned, shaped, and obturated using the single-cone technique. Dentin slices (1 mm) were sectioned from each root third for the push-out test and scanning electron microscopy (SEM) was done to examine the sealer-dentin interface. The failure mode was determined using stereomicroscopy. Bond strength data were analyzed by the independent t-test, 1-way analysis of variance, and the Tukey post hoc test (α = 0.05).
Results: Significantly lower bond strength was observed in irradiated teeth than non-irradiated teeth in the AH Plus group (p < 0.05). The BioRoot RCS group showed no significant reduction in bond strength after irradiation (p > 0.05) and showed a higher post-irradiation bond strength (209.92 ± 172.26 MPa) than the AH Plus group. SEM revealed slightly larger gap-containing regions in irradiated specimens from both groups.
Conclusions: The dislocation resistance of BioRoot RCS was not significantly changed by irradiation and was higher than that of AH Plus. BioRoot RCS may be the sealer of choice for root canal treatment in patients undergoing radiation therapy.
키워드
Bond strength; Dislocation resistance; Radiation therapy; Root canal sealers; Sealer penetration; Therapeutic radiation
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