It is usually normal for the lower incisors to always push against the inside of the upper incisors when chewing. Normal anterior occlusal relationship is that the incisal edge of the mandibular anterior teeth bites within the lingual cut 1/3 of the maxillary anterior teeth. Under normal circumstances, the upper teeth are slightly larger than the lower teeth, the upper teeth cover the lower teeth labial and buccal side, and the lower teeth cover the upper teeth lingual side. In the case of cuspid-crossed jaws, the incisal edges of the mandibular anterior teeth bite within 1/3 of the lingual cut of the maxillary anterior teeth. Normal overjet coverage allows for a close contact relationship between the maxillary and mandibular teeth, thus improving the effectiveness of chewing food. The incisal edges of the upper dentition cover the incisal edges of the lower dentition, and these areas of the lips and soft tissues of the cheeks are not bitten when chewing. In the case of occlusal discomfort, early hospitalization is recommended.