NH3-N density: three experimental groups and control group not significant (P>0.05).
NH3-N浓度：三个试验组与对照组间差异不显著（P>0.05）。
Methods 120 patients were divided into two groups randomly, deploying different anaesthesia methods, experimental group injected Articaine and control group injected Lidocaine.
方法将120例患者随机分为两组，运用不同的麻醉方法，实验组注射碧兰麻，对照组注射利多卡因。
Control group given drug therapy and General canker knowledge health education, experimental groups in the control group basis gives full health education.
对照组给予药物治疗和一般溃疡病知识健康教育，实验组在对照组基础上给予全程的健康教育。
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