中国人女児双生児の歯列, 顎・顔面頭蓋の成長発育に関する研究 : 側貌頭部エックス線規格写真計測結果の日本人女児との比較 A Morphological Study on the Maxillofacial Growth in Chinese Female Twins : Comparison of the lateral cephalometric results with those of Japanese girls

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著者

    • 石川 雅章 ISHIKAWA Masaaki
    • 東京医科歯科大学歯学部小児歯科学講座 Department of Pediatric Dentistry, School of Dentistry, Tokyo Medical and Dental University
    • 竹中 史子 TAKENAKA Fumiko
    • 東京医科歯科大学歯学部小児歯科学講座 Department of Pediatric Dentistry, School of Dentistry, Tokyo Medical and Dental University
    • 桔梗 知明 KIKYO Tomoaki
    • 東京医科歯科大学歯学部小児歯科学講座 Department of Pediatric Dentistry, School of Dentistry, Tokyo Medical and Dental University
    • 舩山 研司 FUNAYAMA Kenji
    • 東京医科歯科大学歯学部小児歯科学講座 Department of Pediatric Dentistry, School of Dentistry, Tokyo Medical and Dental University
    • 小野 博志 ONO Hiroshi
    • 東京医科歯科大学歯学部小児歯科学講座 Department of Pediatric Dentistry, School of Dentistry, Tokyo Medical and Dental University
    • 〓 輝 HUI Deng
    • 北京医科大学口腔医学院儿童牙科 Department of Pediatric Dentistry, School of Stomatology, Beijing Medical University

抄録

6歳から11歳までの中国人女児双生児85組の半縦断的側貌頭部エックス線規格写真を資料とする形態学的研究を行い,顎・顔面頭蓋形態の成長様式を最近の日本人小児と比較検討し,また遺伝的要因の多寡を推定して以下の結論を得た。<BR>1.平均身長曲線において,6歳では中国人女児が3cmほど高く,7歳以降日中女児の差は僅かであった。<BR>2.角度的計測項目において,SNA,SNBは日中女児間で大きな差はないものの,中国人女児の下顎骨後下方部の形状は,ステージ3からすでに日本人成人女性の形状に近かった。<BR>3.量的計測項目において,中国人女児は上顔面部と下顔面部の奥行きの差が日本人女児よりも少なく,相対的に下顎骨が大きい顔立ちであった。<BR>4.プロフィログラムの重ね合わせから,中国人女児は日本人女児よりも顔面前方部で凹凸がより少なく,前方部全体がより直立した形状である印象を受けた。<BR>5。前脳頭蓋底と鼻腔底平面の深さの遺伝力はステージ4で低下するものの60~70%台であり,下顎骨の高さや外形の遺伝力はステージ5が最も高く,70~80%台であった。<BR>6.以上から,日中女児の混合歯列期における顎・顔面頭蓋形態の主な相違は下顎骨後下方部の外形と大きさにあり,それらには遺伝的要因が強く関与していると推定された。

We conducted the semi-longitudinal study on the maxillofacial morphology in Chinese female twins. The materials consisted of 330 lateral cephalograms taken from 85 twin pairs from 6 year-olds to 11 year-olds. We compared their maxillofacial growth pattern with those of present Japanese girls, and estimated the degree of genetic factors concerning the pattern by the twin method.<BR>The results were as follows:<BR>1. On the average stature curves, the mean value of the Chinese at the age of 6 was 3 cm higher than that of the Japanese. At and over the age of 7, however, the two lines were almost coincident.<BR>2. The angular analysis showed that there were few differences at both SNA and SNB between the Chinese and the Japanese. On the other hand, the postero-inferior shape of the mandible of the Chinese was already similar to that of the Japanese adult female from Stage 3.<BR>3. The linear analysis showed that the difference in the depths between upper and lower faces of the Chinese was smaller than that of the Japanese, and the mandiblular size of the Chinese was relatively larger than that of the Japanese.<BR>4. Superimposition of their profirograms showed that the anterior profile of the Chinese seemed to be less uneven and more upright than that of the Japanese.<BR>5. At the depths of both anterior cranial base and nasal floor, the heritabilities of the Chinese were between 60 and 80%, while which lowered at Stage 4. Concerning the heights and the shape of mandible, the heritabilities of the Chinese were between 70 and 90%, and which were highest at Stage 5.<BR>6. It is suggested that the main morphological differences on maxillofacial cranium between the Chinese and the Japanese at the mixed dentition stage were the postero-inferior shape of the mandible and its size, and the genetic factors strongly influenced them.

収録刊行物

  • 小児歯科学雑誌

    小児歯科学雑誌 36(4), 613-624, 1998-09-25

    一般社団法人 日本小児歯科学会

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各種コード

  • NII論文ID(NAID)
    10013868682
  • NII書誌ID(NCID)
    AN00116228
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05831199
  • データ提供元
    CJP書誌  J-STAGE 
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