口腔周囲筋の圧力と咀嚼能力の関連性について

Association between perioral muscle pressure and masticatory performance.

抄録

本研究の目的は、口腔周囲筋の筋力と咀嚼能力との関連性を明らかにすることである。被験者は56名の健常成人（男性30名、女性26名、平均年齢24～9歳）で、正常な咬合を有していました。JMS舌圧測定装置を用いて口腔周囲筋の圧力を測定し，習慣的咀嚼側（H）と非習慣的咀嚼側（non-H）の最大舌圧と頬圧を測定した。また、グミゼリーを用いて咀嚼能力を評価し、Hまたは非Hの条件で咀嚼した後のブドウ糖抽出量を測定した。性別と最大舌圧との関連は、Student's t-testを用いて分析した。H条件と非H条件、男女間の頬圧とブドウ糖抽出量は、二元配置反復測定アノバで分析した。さらに、条件Hでの最大舌圧と頬圧、条件Hでの最大舌圧とグルコース抽出量、条件Hでの頬圧とグルコース抽出量の相関関係を、男女別にPearsonの相関係数を用いて分析した。最大舌圧、頬圧、抽出されたグルコースの量は、男性の方が女性よりも高かった。抽出されたブドウ糖の量は、H条件の方が非H条件よりも高かったが、頬圧では男女間に噛む側の有意差は見られなかった。さらに、最大舌圧、習慣側頬圧とグルコース抽出量の間には、男女で正の相関関係が認められた。以上のことから、口腔周囲筋の圧力が高いことと、咀嚼能力が高いことの関連性が示されました。

The aim of this study was to determine the association between strength of the perioral muscles and masticatory performance. Subjects were 56 healthy adults (30 men and 26 women; mean age of 24·9 years) with normal occlusion. Perioral muscle pressure was measured using JMS tongue pressure measurement device, and maximum tongue pressure and cheek pressure on the habitual chewing side (H) and non-habitual side (non-H) were measured. The masticatory performance was evaluated using gummy jelly, and the amount of glucose extracted was measured after chewing under condition H or non-H. The association between sex and maximum tongue pressure was analysed using Student's t-test. Cheek pressure and the amount of the glucose extracted between condition H and non-H or between men and women were analysed by two-way repeated-measures anova. In addition, the correlations between maximum tongue pressure and cheek pressure on condition H, maximum tongue pressure and the amount of glucose extracted under condition H, and cheek pressure and the amount of glucose extracted under condition H were analysed using Pearson's correlation coefficients for men and women. The maximum tongue pressure, cheek pressure and the amount of glucose extracted were higher in men than in women. The amount of glucose extracted was higher under condition H than under condition non-H, but no significant difference in chewing side was observed in cheek pressure between men and women. Additionally, positive correlations were shown between maximum tongue pressure, habitual-side cheek pressure and the amount of glucose extracted on men and women. In conclusion, the association between higher perioral muscle pressure and better masticatory performance was shown.