永久歯萌出遅延歯の処置法について Treatment of Delayed Eruption Permanent Teeth

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平成元年4月から平成7年6月までの6年2か月間に,東京歯科大学水道橋病院小児歯科に新規来院した6歳以上の小児1,050名の中から永久歯の萌出遅延を主訴に来院し,その後萌出遅延に対する処置を行った症例を調査対象とし,その処置法について調査を行った。<BR>1.処置歯95歯中,萌出誘導の成功したものは92歯であった。<BR>2.粘膜開窓のみの症例は92例中33例(35.9%)と最も多く,次いで骨開窓+牽引の症例が30例(32.6%),粘膜開窓+牽引の症例が18例(19.6%)の順であった。また,上顎中切歯の2例,上顎犬歯の1例に抜歯が行われていた。<BR>3.原因が強靭な歯齦の被覆であれば粘膜開窓のみで萌出遅延歯の萌出力を期待することができるが,その他の原因では開窓後に牽引を行う必要が多かった。<BR>臨床において当該歯牙の自然の萌出力を期待できない症例に対しては積極的に開窓や牽引等の萌出促進誘導処置を行う必要があるものと思われた。

The objective of this investigation was to discover the actual conditions that cause delayed eruption teeth.<BR>The investigation comprised 76 children (40 boys and 36 girls) who complained of delayed eruption of the permanent teeth at the Pediatric Dental Clinic in the Suidobashi Hospital, Tokyo Dental College from April 1989 through June 1995.<BR>Observations were made concerning prevalence of delayed eruption teeth, the causes, the average age of patients at the beginning of treatment, and the treatment itself.<BR>The incidence of the delayed eruption teeth accounted for 7.2% of the new patients. There was no difference according to sex.<BR>The total number of the delayed eruption teeth was 95. The causes of the delayed eruption teeth in the maxilla most often were abnormal position of the tooth germ, followed by an apparent fibrous barrier, supernumerary teeth, retarded exfoliation of the predecessor teeth, effects of dental trauma to deciduous teeth, lack of space for eruption, follicular cysts, odontoma, in that order. In the mandible, the causes were only abnormal position of tooth germ or follicular cysts.<BR>Exposure of the crown from the alveolar bone and active eruptions were more common than exposing of the crown from gingiva.<BR>Three teeth were extracted. The upper central incisor with severe vestibular root angulation was such that it was decided to remove the tooth. The upper central incisor and canine showed odontoma and it was decided to remove the teeth. There were few extractions.

収録刊行物

  • 小児歯科学雑誌

    小児歯科学雑誌 36(4), 702-714, 1998-09-25

    The Japanese Society of Pediatric Dentistry

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  • NII論文ID(NAID)
    10013868966
  • NII書誌ID(NCID)
    AN00116228
  • 本文言語コード
    JPN
  • 資料種別
    NOT
  • ISSN
    05831199
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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