日本人中切歯および第一大臼歯歯冠の大きさの変化

DOI

書誌事項

タイトル別名
  • Changes of Size in Central Incisors and First Permanent Molars of Japanese Children
  • -A comparison of the present status with that of 20 years ago-
  • -現在と20年前との比較-

抄録

Inconsistent results have been reported on the chronological changes in the size of the permanent teeth crown and its actual condition is still not clear. The change in the tooth crown size was investigated between the present and twenty years past by measuring the mesio-distal and bucco-lingual width of central incisors and first permanent molars representing successor and predecessor respectively using plaster models of children with mixed dentition. The subjects were fifty-five children (twenty-eight males, twenty-seven females) and fifty-nine children (thirty males, twenty-nine females)who visited the pediatric dentistry clinic at Iwate Medical University from 1995 to 2000 and from 1975 to 1980, respectively. The following results were obtained.<BR>1. The mesio-distal width of the first permanent molars of the present male children was significantly smaller than twenty years ago. As for the central incisor, the maxillary of the males was larger while mandible of the males, the maxillary and mandible of the females were smaller, although without statistically significant difference.<BR>2. The bucco-lingual width of the first permanent molar showed no significant change when compared with twenty years ago in both male and female children. That of the male central incisor was significantly larger.<BR>3. Although central incisors and first permanent molars were used for measuring typical permanent teeth, no consistent clear tendency was detected. Farther investigations on other kinds of permanent teeth are required.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390001204687065088
  • NII論文ID
    130004634545
  • DOI
    10.11411/jspd1963.41.5_900
  • ISSN
    05831199
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

問題の指摘

ページトップへ