Abstract
On the experience of the case of the lower third bicuspid, as are found in the mouth of the twenty one years old woman, this supernumerary to begining to eruption to the lingual of lower the right and left-side of second molar. The left supernumerary do damage to the tongue, and I extracted the third bicuspid. The etiological factor in the case of supernumerary teeth is one that concerns the early development of epithelial structures and hence is of costitutional origin, although local in expression.