labial closure force, reflecting the function of the orbicularis oris muscles, is related to oral function. the orbicularis oculi muscles, which might regulate visual acuity, are mechanically connected with the orbicularis oris muscles. the orbicularis oculi muscles and orbicularis oris muscles are innervated by the facial nerve. We hypothesized that labial closure force might relate to visual acuity. A total of 396 children aged 7-12 years participated in this crosssectional study. The children, except sixteen children with malocclusion, were devided in to two groups: high (more than or equal to 20/20) and low (less than 20/20) visual acuity groups. The high and low visual acuity groups consisted of 264 and 116 children, respectively. The high visual acuity group had significantly higher labial closure force (P=0.024), a higher propotion of males (P=0.045), lower age (P=0.001) and lower Hellman's dental stage (P=0.002) than the low visual acuity group. Logistic regression analysis showed that labial closure foorce was significantly associated with visual acuity after adjusting for gender, age and Hellman's dental stage (OR 1.65, 955 CI 1.04-2.64, p=0.004). This study suggested an association between visual acuity and labial closure force in elementary school children.
|Number of pages||7|
|Journal||Journal of Dental Health|
|Publication status||Published - 2011|
Yamanaka, R., Akhter, R., Furuta, M., Ekuni, D., Esaki, M., Yamamoto, T., Okazaki, Y., Maruyama, T., Yokoi, A., & Morita, M. (2011). Relationship between Visual Acuity and Labial Closure Force in Japanese Elementary School Children. Journal of Dental Health, 61, 288-294.