Resarch on the relation between ability of mastication and dietary intake in mixed dentition.

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K19121
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57050:Prosthodontics-related
• Research Institution: Niigata University
• Principal Investigator: Yoneda Hiroyuki 新潟大学, 医歯学系, 非常勤研究員 (90709122)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 咀嚼能力 / 側方歯群交換期 / 小学生 / 身体能力 / 体格

Outline of Final Research Achievements

The purpose of this study was to clarify the masticatory ability during the mixed dentition period. For this purpose, a cross-sectional study was conducted on 229 elementary school children (117 boys and 112 girls, average age 11.2±0.9 years old) from the 4th to 6th grades who are undergoing the mixed dentition period. As a result, the masticatory ability during mixed dentition period showed a temporary decrease in the shearing ability, while the mixing ability did not differ between tooth ages, showing different characteristics. Analysis of factors related to masticatory ability suggested that shearing ability was associated with masticatory time and maximum bite force, and mixing ability was associated with masticatory time and obesity tendency.

Free Research Field

補綴系歯学

Academic Significance and Societal Importance of the Research Achievements

咀嚼能力に影響する因子として、咬断能力において、咬合力が強く、咀嚼時間が長く、年齢が高い場合、有意に上昇する傾向を示したことから、学童期の小児は、歯列交換に伴う一時的な咀嚼能力の低下を、咀嚼時間が長くなるような食事を実施することで補える可能性が推察された。また、混合能力において、ローレル指数が有意な説明変数として選ばれた。このことから、成人期では咀嚼能力と体格との関連性が数多く報告されており、学童期においても体重の増加に繋がる要因を改善し、個人の咀嚼機能に合わせた食生活を行うことが必要であることが示唆された。