8020達成者の口腔内模型および頭部X線規格写真分析結果について  [in Japanese] A study of model and cephalograms in elderly persons over 80 years old with at least 20 teeth  [in Japanese]

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Abstract

本研究の目的は, 多数の歯を維持する日本人高齢者を対象として, その咬合および顎顔面形態を明らかにすることである.千葉市では毎年, 8020達成者を募集し千葉市主催の長生き良い歯のコンクールで表彰している.今回は平成10, 11年度の応募者41名に対し, アンケート調査および口腔内診査を実施し, その際口腔内及び顔面写真撮影, X線写真撮影, 印象採得を行い資料とした.応募者の平均年齢は82歳5カ月で, 平均現在歯数は25.3歯であった.年齢および現在歯数に男女差はなかった.咬合関係は, 前後的には上顎前突が78.9%, 正常が21.1%, 反対咬合は0%だった.垂直的には過蓋咬合が34.2%, 正常が65.8%, 開咬は0%だった.犬歯部アングル分はClass I (64.6%)とClass II (25.0%)が大半を占めた.叢生については, 上顎前歯部の叢生を有するものは4.9%と少なかった.下顎前歯部は31.7%に叢生を認めたが著しい叢生ではなかった.顎顔面形態については下顎骨が後下方回転し, やや上顎前突傾向を示した.以上により日本人8020達成者は比較的良好な咬合および顎顔面形態を有することがわかった.

The purpose of this study was to identify occlusal and maxillofacial status of elderly Japanese with many remaining teeth. Chiba City has been holding Annual "Long Life-Good Teeth" Contest to acknowledge the citizens aged 80 or older with 20 or more remaining teeth. This study included 41 applicants for the 1998 and 1999 contests. Each subject was asked to fill out a questionnaire and undergo an intraoral examination, during which intraoral and facial photographs, radiographs and impressions were taken. The subjects whose mean age was 82 years 5 months retained an average of 25.3 teeth. No difference was observed in age or number of preserved teeth between the males and females. Anteroposterior occlusal relationship was characterized by maxillary protrusion in 78.9%, normal overjet in 21.1%, and anterior crossbite in 0%. Vertically, deep bite was noted in 34.2%, normal overbite in 65.8%, and open bite in 0%. Most of the subjects had either Angle Class I (64.6%) or Class II (25.0%) canine relationship. Only 4.9% of the subjects had upper anterior crowding. Lower anterior crowding was observed in 31.7%, though not severe. Maxillofacial morphology was within a normal range with a small tendency toward maxillary protrusion associated with a posteroinferiorly positioned mandible. These results indicate that Japanese who attained the goal of 8020 have relatively good occlusal and maxillofacial forms.

Journal

  • Orthodontic waves : journal of the Japanese Orthodontic Society : 日本矯正歯科学会雑誌

    Orthodontic waves : journal of the Japanese Orthodontic Society : 日本矯正歯科学会雑誌 60(2), 118-125, 2001-04-25

    日本矯正歯科学会

References:  35

Cited by:  11

Codes

  • NII Article ID (NAID)
    110004015638
  • NII NACSIS-CAT ID (NCID)
    AN00187725
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13440241
  • Data Source
    CJP  CJPref  NII-ELS  NDL-Digital 
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