①Tooth defect, which can reduce the chewing function when multiple deciduous molars are involved; ②The food residues in the cavities and the accumulation of bacteria make oral hygiene worse and affect the occurrence of caries in permanent teeth; ③Periodemia of deciduous teeth affects the inherited permanent tooth germ , Causing the enamel development and normal eruption obstacles; ④deciduous teeth lost prematurely due to caries, resulting in the shrinkage of the permanent teeth gap, due to insufficient gaps, the position is abnormal; ⑤deciduous dental crowns damaged by deciduous tooth decay easily damage the local oral mucosa tissue; ⑥deciduous tooth decay Severely, it reduces the chewing function, affects the nutritional intake of children, and affects growth and development; ⑦The development of deciduous tooth caries into periapical disease can be used as a focal tooth to cause focal infections in other tissues of the body; ⑧Affect the appearance and correct pronunciation.
