Abstract：Objective: To evaluate the difference in Edge sealing effect of Nano-resin filling caries cavity before and after radiotherapy. Methods: 45 teeth were randomly divided into three groups with 15 teeth in each group, i.e. filling before irradiation group, filling after irradiation group and control group.Teeth in the filling before irradiation group were prepared cavities on the buccal side, filled with Filtek Z350, and then irradiated fractionally up to 70Gy.Teeth in the filling after irradiation group were irradiated fractionally up to 70Gy, and then the cavities were prepared and filled.Teeth in the control group were directly prepared and filled.After 500 thermocycle,all samples shall be placed in methylene blue solution with 2.0% of mass fraction, for dyeing for 48 hours. All the teeth were cut through the filling center with the direction of perpendicular to the surface of obturator, vertical to the long axis of the teeth.Finally, the dye penetration depth of samples in each group was scored under microscope and the results were tested by non-parametric method. Results: There was no significant difference in microleakage between filling before irradiation group, filling after irradiation group and control group ( P>0.05). Conclusion: The nano-resin shows a stable filling effect under the influence of radiation. Therefore, no matter before or after radiotherapy, the nano-resin can be used to fill the caries cavity of the patients, which has achieved a better filling effect.
付强, 刘艳, 王鹏, 曹宏伟, 霍峰. 放疗前后纳米树脂充填体边缘封闭性能的对比研究[J]. 河北医学, 2019, 25(9): 1543-1545.
FU Qiang, LIU Yan ,WANG Peng, et al. Study on Comparative of Edge Sealing Properties of Nano-resin Fillersbefore and after Radiotherapy. HeBei Med, 2019, 25(9): 1543-1545.
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2019, Vol. 25 
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