发育残疾是残疾的一个类别,我国残疾儿童的发生率约为3—5‰,其中智力低下残疾占很大比重。本文对379例弱智儿童按其弱智程度分别进行错(牙合)畸形发生率及错(牙合)儿童中的口腔不良习惯、吞咽、发音异常进行统计分折,并着重对弱智儿童错(牙合)畸形及口腔不良习惯的特点进行分析讨论。 Developmental disability is a category of disability. The incidence of disabled children in our country is about 3-5 ‰, of which, mental retardation and disability account for a large proportion. In this paper, 379 cases of mentally retarded children according to their mentally handicapped degree of malocclusion, respectively, malocclusion and malocclusion in children with oral malnutrition, swallowing, pronunciation abnormalities statistical analysis, and focus on mentally handicapped children wrong teeth Combined) Deformity and bad oral habits of the characteristics of analysis and discussion.