Abstract
The purpose of this study was to investigate the change of the prevalence of the Temporomandibular Joint dysfunction syndrome, of the signs, and the prevalence distribution of the form of the signs among primary school children, junior high school children and senior high school student as compared with the our previous study which was performed with the same methods.
The subjects were 898 children and 2245 students (1665 boys and 1478 girls).
A subjects displaying any one of the three major signs of the Temporomandibular Joint dysfunction were considered to be a sufferer of the Temporomandibular Joint dysfunction syndrome. The three major signs are sound during condyle movement, limitation of mandibular movement and pain in the region of the muscles for mastication and in Temporomandibular Joint (TMJ).
The results obtained were as follows;
1. The prevalence of the TMJ dysfunction syndrome increased with significant differences among all of the subjects in this study as compared with the our previous study of eight years ago.
2. There was significant difference in the increase of the prevalence between the sexes. The increase of the prevalence in girls was marked.
3. The serious signs or multiple signs of TMJ dysfunction syndrome tended to increase in this study as compared with the our privious study.
