最後更新：2026年10月1日
牙齒數目少於正常的齒列異常。可為先天缺失（牙齒發育不全）或後天喪失。先天缺齒需 X 光排除未萌出的埋伏齒，因埋伏齒可形成含齒囊腫。
Feline chronic gingivostomatitis (FCGS) causes severe, painful oral inflammation. Treatment includes full-mouth or caudal tooth extraction (60-80% respond), immunomodulatory therapy, and pain management. Feline odontoclastic resorptive lesions (FORLs) are painful and cats often mask signs.
犬常見。小型品種犬先天缺齒多見。
這頁有幾個欄位是同系統共用的模板，還沒針對本疾病單獨改寫過。請以臨床判斷為準，記得對照下方文獻。
可點的項目會開啟該疾病頁。要依症狀與檢驗排出完整清單，請用鑑別診斷工具。
建議：依臨床狀況調整
監測頻率：術後 24h
[1]Dental Pain in Cats: A Prospective 6-Month Study.
[2]Unilateral agenesis of permanent superior canine in familial peg-shaped lateral incisors: rare case report and literature review.
[3]Role of Primary Cilia in Odontogenesis.
[4]Tooth aspiration in two cats following maxillofacial trauma.
[5]Dental-implant inflamed surface area: A quantification and simulation study.
[6]AAHA Dental Care Guidelines for Dogs and Cats
可安排定期門診追蹤，屬慢性或自限性病程 (regular outpatient follow-up, chronic or self-limiting course)
先天缺齒無健康影響。埋伏齒拔除後預後極佳。未拔除的埋伏齒可能發展為含齒囊腫。
Diagnostic Approach for Missing Teeth
Assess facial symmetry, lymph nodes, halitosis; visual exam of accessible oral structures
Complete dental charting, periodontal probing, assessment of all teeth
Intraoral radiographs of all teeth to evaluate roots, alveolar bone, and periapical regions