局部用奥威尔凝胶对酸性饮料导致年轻恒牙脱矿和再矿化的影响

目的比较局部使用奥威尔凝胶或氟保护漆对年轻恒牙抵抗饮料酸蚀及酸蚀后脱矿釉质再矿化的影响。方法观测年轻恒牙的釉质经饮料浸泡后再经奥威尔凝胶或氟保护漆局部处理，或奥威尔凝胶及氟保护漆处理后再经饮料浸泡的表面显微硬度（SMH）变化；应用扫描电子显微镜（SEM）观察各组釉质的表面形态。结果饮料浸泡后再经奥威尔凝胶或氟保护漆局部处理的年轻恒牙，其釉质的SMH明显增加（P<0.05），奥威尔凝胶组的SMH高于氟保护漆组（P<0.05）。奥威尔凝胶或氟保护漆处理釉质表面后再经饮料浸泡，奥威尔凝胶组的SMH高于氟保护漆组（P<0.05）。SEM下可见各组釉质表面经饮料及奥威尔凝胶或氟保护漆处理后呈现不同程度的釉质溶解和再矿化。结论年轻恒牙釉质表面应用奥威尔凝胶可以增强釉质对饮料酸蚀的抵抗作用，促进脱矿釉质的再矿化。

Effect of Oravive gel on enamel remineralization and anti-demineralization of young permanent teeth treated by sugar drink

Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China） Abstract] Objective To evaluate the effect of Oravive gel and fluor protectors on remineralization and the capacity of resisting sugar drink erosion. Methods The changes of surface microhardness（SMH） of young permanent teeth treated by Oravive gel or fluor protectors which were immersed in sugar drink in advance were measured. The morphological changes of surface were observed by scanning electron microscope（SEM）. Results The SMH values of the young permanent teeth immersed in sugar drink and then treated with Oravive gel or fluor protectors increased significantly, and the Oravive group was stronger than fluor protectors group（P＜0.05）. For the young permanent teeth treated with Oravive gel or fluor protectors and then immersed in sugar drink, the SHM value of Oravive group was significantly higher than fluor protectors group（P＜0.05）. Under SEM, the enamel surface appeared solvation and remineralization after Oravive gel or fluor protectors treatment. Conclusion Oravive gel may enhance the resistance of young permanent teeth enamel to sugar drink erosion, and promote the remineralization effects of demineralized enamel.