Alternative TitleRelationship between Masticatory Performance and Physical Status and Ability in School Children during Mixed Dentition
Note (General)The mixed dentition period in school age is an important period during which the masticatory function of adults develops. In addition, it is said that masticatory function is affected by tooth developmental stage (dental age: DA) and physical status and ability. However, little objective examination has been done yet. Therefore, it was decided to objectively evaluate the masticatory ability in school children during the dental replacement period using gummy jelly and gum for measuring masticatory ability, and to examine the relationship between masticatory performance and physical status and ability. The subjects were 630 pupils (319 boys, 311 girls) who were 4th to 6th graders and underwent school screening at a elementary school between November 2015 and December 2017. Based on the results of dental examination, we classified into ⅢA, ⅢB, ⅢC, and ⅣA groups according to Hellman's dental age. The objective masticatory performance was assessed in two different aspects by using gummy jelly (sharing ability) and color changeable chewing gum (mixing ability). In addition, height/weight, grip strength, and maximum walking speed were evaluated. Comparison of masticatory performance and physical status and ability at DA examination was performed using Mann-Whitney U test, linear mixed model and a post-hoc test, and the relationship between masticatory performance and physical status and ability at each DA was evaluated by Spearman's rank correlation coefficient. As a result, sharing ability was significantly decreased at ⅢB, but not significantly decreased for mixing ability. We also found a weak correlation between masticatory performance and physical status and ability at each DA, depending on the test food. It is suggested that the objective masticatory performance (sharing ability) decreased during the lateral tooth group exchange period, and that there is a correlation between masticatory performance and some physical status and ability.
学童期の歯列交換期は，成人の咀嚼機能へと発達する重要な時期となっている．また，咀嚼機能は歯の発育段階(歯齢)や体格・身体機能に影響されるといわれている．しかしながら，客観的な検討はまだほとんど行われていない．そこで咀嚼能力測定用グミゼリー(咬断能力)および色変わりガム(混合能力)を用いて，歯列交換期の学童における咀嚼能力を2つの異なる観点から客観的に評価し，さらに体格・身体機能の関連について検討することとした．対象者は，2015年11月から2017年12月の間に兵庫県の某小学校において学校健診を受けた4〜6年生のべ630名(男児319名，女児311名)を対象とした．歯科健診の結果からHellmanの咬合発育段階に準じて，ⅢA群，ⅢB群，ⅢC群，ⅣA群に分類した．咬断能力と混合能力はそれぞれスコア法により評価した．また，身長，体重，握力，最大歩行速度を測定し，各歯齢における咀嚼能率スコアと体格・身体能力との関連について，Spearmanの順位相関係数，Mann-Whitney U test，線形混合モデルおよびpost-hoc testを用いて統計学的検討を行った．その結果，咬断能力は側方歯群交換期(ⅢB)でいったん有意に低下した後，交換期終了後は交換期以前に比べて有意に増加したが，混合能力は低下することなく，歯齢とともに増加する傾向を示した．また，咀嚼能力と体格・身体機能の間には，歯齢によって弱い相関を認めた．これらの結果から，側方歯群交換期における客観的な咀嚼能力の推移は，咬断能力と混合能力との間で異なることが明らかとなり，食事指導において考慮すべきであることが示唆された．
日本咀嚼学会雑誌. 2020, 30(2), 79-87.
新大院博(歯)第544号
Collection (particular)国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
Date Accepted (W3CDTF)2023-09-01T22:11:30+09:00
Data Provider (Database)国立国会図書館 : 国立国会図書館デジタルコレクション