7. (Poetry) the repetition of certain sounds or syllables in a verse line. 8. (Music, other) the quiet repetition of a musical phrase. 9. (Instruments) Also called: echo organ or echo stop a manual or stop on an organ that controls a set of quiet pipes that give the illusion of sounding at a distance. 10.
Though the most common reason for a loose tooth in adults is periodontal disease (gum disease); trauma, bite injury or tumor can also cause teeth mobility. Certain amount of tooth mobility is always present and it is natural, as the teeth are not fixed tight in their sockets.
Erupting permanent teeth cause the roots of baby teeth to be reabsorbed so that by the time they are loose there is little holding them in place besides a small amount of tissue. Most children lose their baby teeth in this order: 1  Baby teeth ordinarily are shed first at about age 6 when the incisors, the middle teeth in front, become loose. 2  Molars, in the back, are usually shed between ages 10 and 12, and are replaced with permanent teeth by about age 13.