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  • Title: Two year longitudinal study of the fluctuation of clinical signs of TMJ dysfunction in Japanese adolescents.
    Author: Morinushi T, Ohno H, Ohno K, Oku T, Ogura T.
    Journal: J Clin Pediatr Dent; 1991; 15(4):232-40. PubMed ID: 1911445.
    Abstract:
    Signs of TMJ dysfunction syndrome were monitored longitudinally from the age of 12 to 14 years in 160 junior high students and 15 to 17 years in 480 senior high school students. Thirty-one percent of the junior high school students and 39.6% of the senior high school students presented with one or multiple signs of TMJ dysfunction syndrome at least once during the examination period. The percentage of subjects presenting continuously with one or multiple signs at all examinations was 8.9% among junior high school students and 12.9% among senior high school students. The predominant sign in the subjects, who continuously presented with one or multiple signs of TMJ dysfunction syndrome was TMJ sounds. The number of subjects presenting with TMJ clinical signs for the first time at the third examination (third year student) was high compared to the other examinations. When intra-individual longitudinal results were examined in subjects, who at least once during the examination period presented with one or multiple signs of TMJ dysfunction syndrome was found to be high (75.0% among junior high school students and 86.5% among senior high school students). In the subjects presenting with one or multiple signs of TMJ dysfunction syndrome continuously over the two year period, the percentage of subjects, who at least once presented with multiple signs was 90.9% among junior high school students and 22.0% among senior high school students.
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