소아치열기의 저작능률에 관한 실험적 연구

The author measured the masticatory efficiency in the 50 children with normal sound dentition, in the 20 children with amalgam filling and in the 20 children with fixed type space maintainer i.e. in the 90 children in total and got the following results. 1. the masticatory efficiency were 53.8% in children with normal sound primary dentition. 2. The masticatory efficiency 48.3% in children with amalgam filling and 40.0% in children with fixed type space maintainer 3. The masticatory efficiency of children were 60.0% of adult's in normal dentition.