著者

堤 直文

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.23, no.3, pp.297-303, 1969-09

被引用文献数

1

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The author produced a measuring apparatus to determine the rate of tongue extension, which could show numerically the degree abnormality. Since the apparatus measures objectively, each observer could make comparative observations. By using this apparatus, investigations were made on the rate of occurrence of Tongue-tie among various groups of male and female junior high school pupils in Kumamoto Pref. The results obtained were summarized as follows. 1. A measuring apparatus for the tongue extension degree was produced, which could measure the value of both maximum spontaneous open mouth and maximum spontaneous tongue extension. (a) The value of maximum spontaneous tongue extension given by the measuring apparatus for tongue extension divided by the value of maximum spontaneous open mouth is the degree of Tongue-tie. (b) The degree of Tongue-tie is as follows. Male … less than 0.40. Female … less than 0.43. (c) Tongue-tie is classified into three degrees, 1°, 2°, 3° according to the relative severity. 2. The rate of occurrence of Tongue-tie is 9.7%. Out of 8767 pupils tested, 852 were founded to have the deformity. (a) There is no difference in the rate of occurrence between the sexes in each district. (b) There is no difference in the rate of occurrence among districts. (c) The rate of occurrence according to the degrees are as follows. 1°…8.77% 2°…0.86% 3°…0.09%