The Effect of Radiotherapy on Root Canal Treatment

DOI 1 Citations 20 References
  • ISHIMURA Hitomi
    Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University
  • FUKUMOTO Yasue
    Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University
  • KIKUCHI Izumi
    Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University
  • YOSHIOKA Takatomo
    Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University
  • TAKAHASHI Hidekazu
    Advanced Biomaterials, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University
  • SUDA Hideaki
    Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University

Bibliographic Information

Other Title
  • ガンマ線照射が根管治療に及ぼす影響 : 根管洗浄効果および根管充填の封鎖性について

Search this article

Abstract

Aim: The purpose of this study was to evaluate the influence of γ-irradiation of teeth on the effectiveness of root canal irrigation and the sealing ability of root canal filling materials. Methodology: <Experiment 1> Twenty bovine teeth were divided into four groups : those subject to no irradiation, 60 Gy, 3 kGy, and 30 kGy of radiation, respectively. All teeth were split longitudinally and irrigated with 6% NaClO or distilled water. After irrigation, SEM images of the root canal wall dentin were evaluated and scored. The results of the score evaluation were statistically analyzed based on logistic-regression analysis (p<0.05). <Experiment 2> Ninety extracted single rooted human teeth were allocated to three groups: those subject to no irradiation, irradiation before root canal filling, and irradiation after root canal filling raspectively. The roots in each group were divided into three subgroups of 10 teeth each and obturated with gutta-percha point (GP) with Sealapex (Group A), Resilon™ with Epiphany™ sealer (Group B), or GP with MetaSEAL™ (Group C). After the canal sealers were set, a polypropylene tube containing a 0.06% methylene blue dye solution was attached to the coronal portion of each root. Two millimeters of the apical portion were immersed in distilled water within a glass bottle. The amount of dye emerging through the root into the water was measured with a spectrophotometer at 1, 4, 8, 15, and 30 days after immersion. Data obtained were statistically analyzed using ANOVA and Tukey-Kramer at 5% significant level. Results: <Experiment 1> The degree of irrigation scoring differed significantly between the no irradiation group and the 3 kGy group, and between the no irradiation group and the 30 kGy group. Significant differences were also found between the two irrigation methods in all groups irrespective of the dose of irradiation (p<0.05). <Experiment 2> Statistical analysis revealed that the amount of leaked dye on the 30th day differed significantly between the Sealapex group and the MetaSEAL™ group. There were no significant differences in the amount of leaked dye among the no irradiation group, the irradiation before root canal filling group, and the irradiation after root canal filling group. Conclusions: Under the conditions of this study, the sealing ability of root canal filling materials was not affected by irradiation of the teeth. When a root canal was irrigated, dentin exposed to high dosages of radiation showed different features compared to normal dentin.

Journal

Citations (1)*help

See more

References(20)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top