Index of Orthodontic Treatment Need を用いた不正咬合の疫学的評価に関する研究

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Many attempts have been made in the past to develop indices for malocclusion. The Index of Orthodontic Treatment Need (IOTN) was developed in the United Kingdom to assess both aesthetics and dental health primarily for clinical purpose. The IOTN attempts to rank malocclusion in terms of the significance of various occlusal traits for an individual's dental health and perceived aesthetic impairment. The IOTN incorporates an Aesthetic and Dental Health Component. The first purpose of this investigation is to evaluate the effectiveness of IOTN in the assessment of malocclusion in the Japanese. The second is to evaluate the difference between the IOTN and the Dental Aesthetic Index (DAI). The orthodontic treatment needs of 681 sets of study casts of high school students aged 15 to 18 (396 males and 285 females) in Kyushu were assessed using the IOTN. And 200 sets of study casts (100 males and 100 females) were randomly chosen for the evaluation of the difference between the DAI and the IOTN. The results were as follows : 1. Allocated to the Aesthetic Component (AC) of IOTN, 19.3% of adolescents needed the orthodontic treatment. Allocated to the Dental Health Component (DHC) of IOTN, 55.1% of adolescents needed the orthodontic treatment. No sex difference is noted. 56.0% of adolescents needed orthodontic treatment. 91.2% of those who needed of orthodontic treatment had Crossbite or Displacement of Teeth or both. 2. The results of DAI was correlated to the results of IOTN and each components of IOTN. (p<0.001) Both IOTN and DAI are useful, but IOTN is more useful for the clinical screening of malocclusion, however, DAI is more useful for the epidemiological screening of malocclusion.
九州歯科学会の論文
1997-12-25

Index of Orthodontic Treatment Need を用いた不正咬合の疫学的評価に関する研究

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