Summary: This is a literature review aboutsupernumerary teeth, its etiology, diagnosis, clinical complication and treatment. An earlydiagnosis is the key to an adequate treatment, and to reduce complications such tooth eruptionanomalies, dental malpositions, impacted teeth and cysts formation. It is important to perform earlya complete oral evaluation of the pediatric patient’s including the non-erupted teeth . Proper useof Periapical or Panorex Rx exams may help clinicians to determine early teeth numbers and/or teethposition anomalies. Key words: Supernumerary teeth. Impacted teeth. Eruption teethalterations.