The hazards that may occur after apicoectomy include loose tooth loss, gingival sinus tract, etc., as follows. 1. Loose teeth: apicoectomy generally need to remove about 3mm of the root tip, the length of the root is relatively reduced, which may lead to crown-root disproportion, if periodontal inflammation, or the original periapical inflammation has not been controlled, the teeth can be loosened and fall off. 2. Gingival sinus tract: If the section is not well closed, there is microleakage, etc., the original periapical inflammation can not be well controlled, periapical chronic inflammation persists, and a gingival sinus tract may be formed. There may be other hazards after apicoectomy, it is recommended to go to a regular medical institution to receive professional treatment.