Rate of normal oral mucosa was 16.2%. Rate of normal labial,buccal,palatal and gingival mucosas was 65.7%. Incidence of fissured tongue was 74.3%.

• 口腔粘膜全无异常率16．2%25，唇颊腭龈粘膜无异常率65．7%25，裂纹舌检出率74．3%25，其异常中多见血管痣斑、粘膜老年斑，未见恶性病变。