正畸粘接用玻璃离子粘固剂的抑菌性能研究

目的　探讨正畸粘接用玻璃离子粘固剂对托槽周围菌斑中致龋菌是否有抑制作用。方法　选择 2 2例患者 ,采用自身对照方法 ,分别用玻璃离子粘固剂和复合树脂粘接剂粘接托槽 ,1个月后采集托槽周围菌斑 ,进行细菌培养和微生物分析。结果　 2种粘接剂托槽周围菌斑的总菌落形成单位数 (cloneformingunit ,CFU)差异无显著性 (复合树脂粘接剂为 2 4× 10 10 CFU/L ,玻璃离子粘固剂为 2 8× 10 10 CFU/L ,P =0 6 73)。与复合树脂粘接剂相比 ,应用玻璃离子粘固剂后并未明显减少托槽周围菌斑中变形链球菌的数量和百分比。结论　正畸粘接用玻璃离子粘固剂不能在较长时间内有效抑制托槽周围致龋菌的生长繁殖

The inhibitory effect of glass ionomer cement for orthodontic bonding on bacteria

OBJECTIVE: To prove the inhibitory effect of glass ionomer cement for orthodontic bonding on bacteria. METHODS: Twenty-two persons were chosen randomly. In vivo, with the split-mouth technique, brackets were bonded with glass ionomer cement or composite resin respectively. Plaque samples were taken from the area of the adhesive one month after the placement of brackets and incubated for microbiologic analysis. RESULTS: There was no significant difference in the amount of total anaerobic bacteria with the two materials. There were also no obvious reduction of the numbers of S. mutans (the composite: 2.4 x 10(10) CFU/L, the glass ionomer cement: 2.8 x 10(10) CFU/L, P = 0.673) and its proportion (percentage of total CFU) with the use of glass ionomer cement compared with the composite. CONCLUSIONS: There was no long term inhibitory effect on bacteria adjacent to glass ionomer cement for orthodontic bonding.