<prompt> The most frequent tooth to be impacted is :Lower third molarLower canineUpper third molarUpper premolar  <response>: Impacted tooth :Is the tooth that has failed to erupt completely or partially to its correct position in the dental arch and its eruption potential has been lost.Order of frequency :Mandibular 3rd molar i.e. Lower 3rd molar.Maxillary 3rd molar Upper 3rd molar.Maxillary canine. 