請與牙醫師就口腔清潔、飲食習慣、氟化物的使用、曾經的蛀牙經驗等等因素進行蛀牙風險評估後，決定每三或六個月定期檢查的頻率。蛀牙風險比較高的孩子應該以較高的頻率定期回診。

Please discuss it with your dentist and evaluate your caries-risk based on dental hygiene, dietary habits, use of fluoride and past history of caries. Normally it's recommended to have a check up every 3 to 6 months. Children with higher caries-risk should have a checkup more frequently.