日本における Index of Orthodontic Treatment Need を用いた不正咬合の疫学調査  [in Japanese] Epidemiological investigation of malocclusion in Japan using the Index of Orthodontic Treatment Need (IOTN)  [in Japanese]

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Author(s)

    • 渡辺 厚 WATANABE Atsushi
    • 新潟大学大学院医歯学総合研究科口腔生命科学専攻摂食環境制御学講座歯科矯正学分野 Department of Oral Biological Science, Division of Orthodontics, Niigata University Graduate School of Medical and Dental Sciences Course for Oral Life Science
    • 渡邉 直子 WATANABE Naoko
    • 新潟大学大学院医歯学総合研究科口腔生命科学専攻摂食環境制御学講座歯科矯正学分野 Department of Oral Biological Science, Division of Orthodontics, Niigata University Graduate School of Medical and Dental Sciences Course for Oral Life Science
    • 渡邉 洋平 WATANABE Youhei
    • 新潟大学大学院医歯学総合研究科口腔生命科学専攻摂食環境制御学講座歯科矯正学分野 Department of Oral Biological Science, Division of Orthodontics, Niigata University Graduate School of Medical and Dental Sciences Course for Oral Life Science
    • 宮崎 秀夫 MIYAZAKI Hideo
    • 新潟大学大学院医歯学総合研究科口腔生命科学専攻口腔健康学講座予防歯科学分野 Department of Oral Health Science, Division of Preventive Dentistry, Niigata University Graduate School of Medical and Dental Sciences Course for Oral Life Science
    • 齋藤 功 SAITO Isao
    • 新潟大学大学院医歯学総合研究科口腔生命科学専攻摂食環境制御学講座歯科矯正学分野 Department of Oral Biological Science, Division of Orthodontics, Niigata University Graduate School of Medical and Dental Sciences Course for Oral Life Science

Abstract

わが国の不正咬合の疫学調査は独自の基準によるものが散見されるのみで,国際的に比較可能なIndex of Orthodontic Treatment Need(IOTN)を用いた疫学調査はほとんどない.そこで今回,日本人における不正咬合の種類と程度および矯正治療の必要性に関する基礎データの構築を目的に,IOTNを用いた疫学調査を行った.調査対象は,4つの地域の11歳から14歳児,497名としたが,矯正治療経験のある72名(14.5%)は除外した.調査は,レントゲン,研究用模型を利用せず口腔内診査法によりIOTNを算出した.機能と形態の両面から咬合を評価するDHCにおいて「矯正治療必要性あり」(DHC Grade 4,5)と判定された者は34.1%であった.不正咬合の内訳は,叢生17.4%,過度のoverjet 10.1%,萌出余地不足13.2%,永久歯欠損4.0%,過蓋咬合2.6%,交叉咬合2.4%,開咬0%,反対咬合0%であった.一方,客観的審美性の観点から咬合を評価するACにて「矯正治療必要性あり」(AC Grade 8-10)に分類された者は10.4%であった.これらの結果を総合すると,「矯正治療必要性あり」と分類された者は35.5%であった.以上の結果をこれまでの報告と比較すると,矯正治療が必要とされる者の割合は英国の調査結果とほぼ近似していたが,不正咬合の種類としては叢生が約2倍で,不正咬合の特徴は欧州と異なる可能性が示唆された.

Although some epidemiological investigations of malocclusion have been carried out using original indices in Japan, few studies using the internationally comparable index of orthodontic treatment need (IOTN) have been conducted. The aim of this study was to provide epidemiological baseline data on the need for orthodontic treatment and the occlusal features in Japanese schoolchildren using IOTN. Four hundred ninety-seven schoolchildren aged 11-14-years in four varying geographical areas participated in this investigation. Seventy two children (14.5%) who had received orthodontic treatment were excluded from the survey. No radiographs and study casts were used; IOTN was calculated from direct oral examination. The dental health component (DHC) showed that 34.1% were assigned to the need for treatment (DHC Grade 4, 5). The types of malocclusion included: 17.4% crowding; 10.1% increased overjet; and 13.2% impeded eruption of teeth; 4.0% hypodontia; and 2.6% deepbite. In case of the aesthetic component (AC), 10.4% were assigned to the need for treatment (AC Grade 8-10). In all, 35.5% of the children were in objective need for orthodontic treatment. In conclusion, the orthodontic treatment need of Japanese schoolchildren's was nearly identical to that of British schoolchildren. The data of DHC, however, suggest that the occlusal trait in Japanese might be different, since crowding was almost twofold higher than that of Europeans.

Journal

  • Orthod Waves-Jpn Ed

    Orthod Waves-Jpn Ed 68(3), 142-154, 2009-10-25

    日本矯正歯科学会

References:  43

Cited by:  2

Codes

  • NII Article ID (NAID)
    110007503426
  • NII NACSIS-CAT ID (NCID)
    AA11917839
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13490303
  • Data Source
    CJP  CJPref  NII-ELS  NDL-Digital 
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