【摘要】 目的 观察固定矫治患者咀嚼木糖醇口香糖后唾液流速和pH值的变化规律。方法 选择固定矫治中患者40例，男、女各20例，年龄15～18岁，分别检测咀嚼木糖醇口香糖前、后以及停止咀嚼10min内不同时间段唾液流速和pH值。结果 咀嚼口香糖后唾液流速、pH值增加，除嚼口香糖后0～1min唾液的pH值与嚼口香糖前相比差异无显著性(P>0.05)外；嚼口香糖后各时间点的唾液流量、pH值与嚼口香糖前相比差异均具有显著性(P<0.05)。结论 固定矫治患者咀嚼木糖醇口香糖有助于防治牙釉质脱矿。

    【关键词】 口香糖；唾液分泌；氢离子浓度

    The effects of chewing xylitol gum on salivary flow rate and pH in fixed appliance

    MA Yong-ping，SONG Yong-sheng，LIU Li-ying,et al.The Second People’s Hospital of Baoding,Baoding 071051,China

    【Abstract】 Objective To observe the change of salivary flow rate and pH after chewing xylitol gum in fixed appliance.Methods Salivary flow rate and pH were measured before and after chewing gum in 40 patients with fixed appliance.Results Salivary flow rate and pH were increased significantly after chewing xylitol gum except the increasing of pH at 0～1min after chewing xylitol gum.Conclusion Chewing xylitol gum would help prevent and treat enamel demineralization for fixed appliance. ......