摘要
目的:评价放射治疗前后纳米树脂充填龋洞的边缘封闭效果的差异。方法:在我院口腔颌面外科门诊新鲜拔除的无龋坏、无裂纹、无缺损的离体前磨牙45颗,随机分成三组,每组各15个,分别为照射前充填组、照射后充填组和对照组,照射前充填组的样本牙用高速涡轮牙钻在颊侧面备洞,用Filtek Z350充填,然后进行总剂量为70Gy的放射线照射。照射后充填组的样本牙先进行总剂量为70Gy的放射线照射,然后进行窝洞预备和充填。对照组直接进行窝洞预备和充填。所有样本牙进行500次冷热循环,然后置于质量分数为2.0%的亚甲基蓝溶液中染色48h。用金刚砂片在水冷却下垂直于牙体长轴、经充填体中心将牙体横向剖开,在体式显微镜下对各组样本洞壁的染料渗入深度进行计分并对结果进行非参数检验。结果:照射前充填组、照射后充填组和对照组样本的微渗漏值无明显差异(P>0.05)。结论:纳米树脂在放射线的影响下,充填物边缘的封闭性能没有发生明显变化。故无论在放射治疗过程之前或之后对患者进行龋洞充填治疗,可使用纳米树脂充填以获得较好的充填效果。
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.
作者
付强
刘艳
王鹏
曹宏伟
霍峰
FU Qiang;LIU Yan;WANG Peng(Affiliated Hospital of Chengde Medical College,hebei Chengde 067000,China)
出处
《河北医学》
CAS
2019年第9期1543-1545,共3页
Hebei Medicine
基金
河北省承德市科学技术研究与发展计划项目,(编号:20151030)
关键词
放射线
纳米树脂
微渗漏
Radiation
Nano resin
Microleakage
