单纯机械性菌斑控制对学龄前儿童变形链球菌的短期影响

目的评价用牙刷和牙线进行机械性菌斑控制对学龄前儿童变形链球菌的影响。方法检查者单盲的随机对照临床研究。将54名唾液中检出变形链球菌的3岁学龄前儿童纳入该研究,随机分为实验组和对照组。菌斑染色后,口腔医学生给实验组儿童用牙刷和牙线彻底清洁牙面菌斑,不用牙膏,每天一次,共10次。用Dentocult SMStrip mutans(D-SM)监测唾液中变形链球菌的水平。结果 10次机械性菌斑控制结束后,实验组的D-SM值由基线的1.82下降到0.95(P<0.001),干预结束后2周D-SM值上升到1.62。对照组D-SM值的波动无统计学意义。结论连续、彻底的单纯机械性菌斑控制能降低学龄前儿童变形链球菌水平,干预结束后该作用消失。

Short term effect of mechanical plaque control on salivary S. mutans in preschool children

Objective To verify the effect of mechanical tooth cleaning by toothbrush and dental floss on Streptococci mutans of preschool children.Methods Blinded randomized controlled clinical trial.54 3-year-old preschool children with detectable S.mutans were recruited.Dental college students cleaned the teeth of test group participants with toothbrush and dental floss under the indication of plaque disclosing agent once a day.Dentocult SM Strip mutans（D-SM）were used to test the S.mutans in saliva.Results The D-SM test scores had declined from 1.82 to 0.95 for the test group after 10 times of tooth cleaning（P 0.001）,and the scores increased to 1.62 after tooth cleaning ceased for 2 weeks（P 0.05 compared with baseline）.The D-SM level of control group had not fluctuated statistically.Conclusion Meticulous and continuous plaque control with tooth brush and dental floss can decrease the S.mutans level of preschool children,however,the effect ceased as the intervention ceased.