Legal basis: classification of human injury and disability 5. 10.2 head and face injury 23) lip valgus or small mouth deformity;
24) Lip defect or deformity, resulting in tooth exposure;
25) Partial defect of tongue;
26) More than 7 teeth are missing or broken; Part of alveolar bone defect, with more than 4 teeth missing or broken;
27) mouth opening is limited;