1. It includes diseases mainly involving oral mucosa, dermatogic diseases involves oral mucosa, some diseases with both ectoderm and mesoderm origins and oral manifestation of systemic diseases. 同时发生于皮肤或单独发生于口腔粘膜上的皮肤疾病；合并起源于外胚层和中胚层的某些疾病的口腔表现；全身或系统性疾病的口腔表现。
2. Pay attention to oral hygiene and good oral care, postprandial must use toothpicks to remove food residue, and ground mouthwash, dental caries and oral reduce secondary infection. 注意口腔卫生和做好口腔护理，餐后一定要用牙签将食物残渣清除，并勤漱口，减少龋齿和口腔继发感染。
3. Objective To study the connection between oral health behavior, local stimulation and oral cancer for the prevention of oral cancer. 目的探讨口腔癌患者口腔卫生行为，为口腔癌的预防提供理论依据。
4. Objective To investigate the status of oral health behavior and the recognition of oral care knowledge, and to provide base-line information for oral health care. 目的了解西藏那曲地区藏族学生口腔健康行为状况及口腔保健知识知晓情况，为口腔预防保健工作提供基线资料。
5. In addition, the difficulty of the oral task also plays important role in affecting students' oral test anxiety and oral production. 录音设备的确对大多数学生会产生负面影响，但低焦虑学生在回答有准备的口试题目时却没有受到影响；
