Significance of multidirectional lip-closing force in healthy elderly persons and influence of prothodontic treatment on this function

本研究的目的是阐明多向唇合力测量系统测量唇合力的特征。记录了139名受试者在最大自愿闭唇任务中8个方向的LCFs、身高、体重、握力、牙齿状况和活动义齿的使用情况。8个方向LCF之和（total LCF [TLCF]）男性显著大于女性。定向LCF （DLCF）大小依次为垂直、倾斜和水平方向。男性3对对立型dlcs之间无显著相关性，女性4对对称型dlcs之间无显著相关性。男性TLCF与身高、体重呈显著的弱相关，女性TLCF与身高、体重呈显著的弱相关。TLCF与两性残牙数、垂直咬合支持数及所有前牙保留均无统计学意义。在男性中，佩戴义齿者的TLCF显著大于未佩戴义齿者。

The objective of this study was to clarify the characteristics of lip-closing force (LCF) measured by the multidirectional LCF measurement system. In 139 subjects, LCFs in eight directions during maximum voluntary pursing-like lip closure tasks, height, body weight, handgrip strength, dental status and the usage of removable denture were recorded. Summed value of LCFs for all eight directions (total LCF [TLCF]) in male was significantly greater than that in female. The directional LCF (DLCF) was large by vertical, oblique and horizontal directions order. No significant correlation between opposing DLCFs was observed in 3 pairs in male and the symmetric DLCFs were not observed from 4 pairs in female. The significant weak correlation between TLCF and height, body weight were observed in male not in female. TLCF was not statistically related to the number of residual teeth or vertical occlusal support and the preservation of all anterior teeth in both genders. In male, TLCF in the subjects with denture wearing was significantly greater than that without denture wearing.