Abstract
At the Department of Pediatric Dentistry in MDU have been undertaking the dental check-ups of kindergarten children it in various parts of China since 1989. The results of the dental examinations of the same kindergarten in Shijiazhuang city undertaken in 1991 and 2006 are compared, and, in addition, the welfare Work Ministry had investigated children of same age in Japan and then discussed.
The subjects on the dental examination the situation were malocclusion, tooth abnormali ty, inflammation of the gum, and caries status for a total of 174 children (55 boys,119 girls) four or five years of age at Kindergarten in Shijiazhuang city.
The increasing trend toward maloccl usion and tooth abnormality was noted, and as for the inflammation of gum, a increasing trend was noted compared with 15 years ago.
There is a tendency toward a decrease in the mobility of caries, the ratio of caries contraction, and the number of average caries person which were compared with the previous time, and each item has the same ratio as in Japan. The caries treatment rate was remarkably low was the ratio 15 years ago. The ratio of non-treatment according to the caries grade was the same degree as the ratio 15 years ago. Moreover, in four year old children, mild caries showed a larger ratio and severe ones show smaller ratio compared with same ages in Japan. In the five year old, children this is reversed. This findings were compared with the findings 15 years ago, and prevalence of the inflammation of the gum showed an increasing trend. The caries treatment ratio is still low. A remarkable a trend toward an increase was the decrease in caries prevalence ratio of the primary teeth was noted. Mild caries of young children showed a tendency not to be treated based on the ratio of non-treatment according to the caries grade though there is a difference in the number of subjects of this investigations.
The unestablishment of the oral health improvement system including caries prevention programs and the deficiencies of the number of dentists is thought as a factor behind this.
