Medical Journal

Research was carried out to measure the chronlogical changes of L-C-S (Labial-Closure Strength) with aging. Numbers of subjects were 3,172 youth (2 to 19 yrs old), 761 adults (20 to 59 yrs old), and 170 eldery (60 to 89 yrs old), for total of 4,103 subjects. L-C-S is fully developed at the age of about 18-20 yrs for both males and females. L-C-S was 14-16 N for males and 10-12 N for females. These numbers showed little change until age 60, but there after the strength declined gradually with increasing age. L-C-S at age 80 was 5 to 7 N, which was almost the same as at age 3, LCS of healthy youth and adults, both males and females, in every age group, were 3 - 4 N higher compared with youth and adults who had diseases. Starting to train the oral cavity muscles with the use of the oral rehabilitation pparatus LIP TRAINER "Patakara®", from around age 60 will increase the L-C-S, and is effective in terms of health maintenance. L-C-S
appears to be a useful parameter that shows the status of the respiratory organs and immune related disease, indicating the health status of the oral cavity environment.

Extract from:
The Japanese Journal of Conservative Dentistry
The general theme of this article had been reported
during the 112rd to the 116th conferences of Japan
Dental Conservation Academy
45 (5) : 817~828, 2002

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