低出生体重児における吸啜および咀嚼の特徴  [in Japanese] Characteristics of Sucking and Chewing Function in Extremely and Very Low Birth-weight Children  [in Japanese]

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Author(s)

    • 近藤 亜子 KONDO TSUGUKO
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry
    • 市橋 豊雄 ICHIHASHI TOYOO
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry
    • 後藤 博祐 GOTO HIROSUKE
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry
    • 杉本 勘太 SUGIMOTO KANTA
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry
    • 仲岡 佳彦 NAKAOKA YOSHIHIKO
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry
    • 田村 康夫 TAMURA YASUO
    • 朝日大学歯学部口腔構造機能発育学講座小児歯科学分野 Department of Pediatric Dentistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry

Abstract

低出生体重児は,出生後保育器内で全身管理下におかれ経管栄養の期間が長期に渡るため,歯列を含めた口腔および顎顔面の形態,吸啜・咀嚼機能の発達に影響を及ぼすことが推測される.そこで,低出生体重児の歯科的問題や口腔の機能的な発達を明らかにする目的でアンケート調査,咬合力,乳犬歯間幅径,成長による吸啜および咀嚼機能の変化について検討した.その結果,咀嚼能力の発達の遅れや,その他口腔機能に関する問題を感じているなど様々な不安を抱いていることが明らかとなった.また,咀嚼運動時の咀嚼筋活動を観察すると,満期正常出生児に比較し咬合力は低く,しかし咀嚼筋活動量は全般に高いことが分かってきた.これは,超・極低出生体重児は低い咬合力を補うため,「ゆとり」のない咀嚼を行っているためと考えられた.しかし,咀嚼機能のキャッチアップという点では全身運動機能より早期に達成されると推測できた.

Extremely and very low birth-weight infants (EVLBW) are given nutrition through tube feeding for several months in the neonatal intensive care unit (NICU). Therefore, the development of oral function and/or gnathofacial morphology are expected to be somewhat affected. The purpose of this series of studies in our department was to investigate the development of sucking pattern, masticatory function, occlusal force and primary canine distance in children with EVLBW, through a questionnaire survey and functional analysis. While there was no significant difference between the low birth-weight (LBW) and normal birthweight (NBW) groups, significant differences were found between the EVLBW and NBW groups in the following areas: sucking problems after leaving the hospital, at the beginning of weaning and at eating ordinary foods, unbalanced diet, frequency of pacifiers, and verbal development. The occlusal contact area, occlusal force and bilateral primary canine distance of those with EVLBW were significantly smaller than those with NBW. However, the muscle activity of those with EVLBW was found to be significantly higher than that of those with NBW. Regarding the growth and development over 1.5 years, the values of both the occlusal contact area and the occlusal force for those with EVLBW significantly increased, whereas the muscle activities of those with EVLBW decreased. In conclusion, it is suggested that the rate of feeding problems accompanying the development of oral function was higher with parents who have EVLBW children than with those who have NBW. It is also suggested that the masticatory muscles of children with EVLBW are much more highly activated when chewing, as compensation for their low occlusal force. The masticatory function of EVLBW children might catch up in a stage earlier than that of their general growth.

Journal

  • The journal of Gifu Dental Society

    The journal of Gifu Dental Society 30, 188-198, 2004-11-20

    Asahi University

References:  43

Codes

  • NII Article ID (NAID)
    110004689646
  • NII NACSIS-CAT ID (NCID)
    AN00053070
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03850072
  • Data Source
    CJP  NII-ELS 
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