Abstract
This is a report of a case of supernumerary tooth fused to the mesial side of the 2nd molar in lower left jaw having a protostylid found in 19-year-old male subject. The fusion took place with a part of the crown as well as with supernumerary tuberculum of the supernumerary tooth and its root portion was completely fused with the root of the 2nd molar. X-ray examination showed that the pulp of the supernumerary tooth was totally independent from that of the 2nd molar.