2. Patients with facial paralysis.

3. Female friends should not have mandibular angle plastic surgery during menstruation.

4. Mental abnormality, peculiar aesthetic views and unrealistic surgical requirements.

5. Patients with serious medical diseases, heart disease, hepatitis, nephritis, pneumonia and other diseases, or patients with dental caries, periodontitis, oral ulcers and other oral infection sources are not suitable for mandibular angle plastic surgery.