乳歯および混合歯列の小児および永久歯列の若年成人の下顎運動-運動と咬合特性との関連

Mandibular movements in children with deciduous and mixed dentition and in young adults with permanent dentition-the association between movements and occlusal traits.

• Hettel Sepp
• Heli Vinkka-Puhakka
• Timo Peltomäki

抄録

背景:

下顎運動の横断的研究は、歯列の発達傾向に関するデータを提供し、公衆衛生サービスの計画を支援する。

BACKGROUND: Cross-sectional studies of mandibular movements provide data on developmental trends of dentition and support planning of public health services.

目的:

本研究の目的は、落葉および混合歯列の小児および永久歯列の若年成人の下顎運動能力を測定することであった。下顎運動に及ぼす年齢と性別の影響、および下顎運動と咬合形質との関連性を分析しました。

OBJECTIVE: The aim of this study was to measure mandibular movement capacities in children with deciduous and mixed dentition and in young adults with permanent dentition. The influence of age and gender on mandibular movements and the association between mandibular movements and occlusal traits were analysed.

方法:

エストニア人1172人を対象とした．第1群：落葉歯列の子供，第2群：混合歯列の子供，第3群：永久歯列の若年成人である．最大開咬、下顎後突出、突出が登録された。

METHOD: The sample consisted of 1172 Estonians: group 1: children with deciduous dentition; group 2: children with mixed dentition; and group 3: young adults with permanent dentition. Maximum opening, mandibular laterotrusion, and protrusion were registered.

結果:

年齢は下顎運動と相関していた．若年成人の下顎運動は、落葉歯列と混合歯列の子供と比較して統計的に有意に大きく、混合歯列の子供は落葉歯列の子供と比較して下顎運動が大きかった。若年成人男性は同年代の女性に比べて下顎運動が大きかった。下顎運動能力といくつかの咬合特性との間に関連性が認められました。下顎運動能力は、交差咬合と開放咬合の子供の方が、対応する咬合形質を持たない子供に比べて小さかった。下顎運動能力は、対応する咬合形質を持たない子供と比較して、深い咬合とオーバージェットが増加した子供の方が大きくなっていました。

RESULTS: Age was correlated with mandibular movements. Young adults had statistically significantly larger mandibular movements as compared to children with deciduous and mixed dentition, and children with mixed dentition had larger mandibular movements as compared to children with deciduous dentition. Young adult males had larger mandibular movements than females of the same age. Associations were found between mandibular movement capacities and some occlusal traits. Mandibular movement capacities were smaller in children with crossbite and open bite as compared with children without corresponding occlusal traits. Mandibular movement capacities were larger in children with deep bite and increased overjet as compared with those without corresponding occlusal traits.

結論:

下顎運動能力は年齢と性別に依存します。最大口開度、下顎後突出、突出には関連があり、下顎運動といくつかの咬合形質には関連がある。

CONCLUSION: Mandibular movement capacities are age and gender dependent. Maximum mouth opening, mandibular laterotrusion, and protrusion are related, and mandibular movement and some occlusal traits are associated.

© The Author(s) 2020. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oup.com.