Oral frailty prevention app. Speak Pa Ta Ka and hit the flowing nails! Daily training is effective for preventing long-term care and improving oral deterioration. ★ Do you know the word frail? As we get older, our muscles gradually weaken, we have fewer opportunities to go out (interaction with others such as social participation), and we need help and long-term care. Such a state in which the work of the mind and body becomes weaker with aging is called frailty. In other words, it is a state b