title: Clinical epidemiological analysis of 173 supernumerary molars.
abstract: OBJECTIVE
  To determine the prevalence of supernumerary molars in a sector of the population of Madrid, as well as the possible complications associated with the presence of hypergenetic molars.
  
  
  METHODS
  A retrospective, descriptive study was carried out, which included a data assessment of all patients (13557) seeking dental care at a hospital's department of oral surgery across 4 years. The proposed methodology consisted of preparing a medical record in order to obtain data on the medical record number, age and sex of the patient, radiological findings such as location and type of supernumerary molar, retained/erupted molar, related accidents and tooth morphology.
  
  
  RESULTS
  Supernumerary molars were found to be present in 130 patients, representing a prevalence of 0.96% of the total population studied. These patients had a total of 173 hypergenetic molars, consisting of 137 distomolars and 36 paramolars Mechanical-obstructive pathology was associated with 28.9%, whereas enlargement of the follicular sack bigger than 3 mm was present in 16.2% of the sample.
  
  
  CONCLUSIONS
  Supernumerary molars are usually diagnosed as a coincidental radiological finding without any associated pathology. However a higher percentage of comorbidity was found than initially expected.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Complutense University of Madrid, Spain.
authors.forename: José María
authors.initials: JM
authors.lastname: Martínez-González
authors.forename: Jorge
authors.initials: J
authors.lastname: Cortés-Bretón Brinkmann
authors.forename: José Luis
authors.initials: JL
authors.lastname: Calvo-Guirado
authors.forename: Oscar
authors.initials: O
authors.lastname: Arias Irimia
authors.forename: Cristina
authors.initials: C
authors.lastname: Barona-Dorado
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003795:Dental Sac / Q000473:pathology; D016021:Epidemiologic Studies; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008875:Middle Aged; D008963:Molar / Q000002:abnormalities*; D015995:Prevalence; D012189:Retrospective Studies; D012737:Sex Factors; D013030:Spain / Q000453:epidemiology; D014095:Tooth, Impacted / Q000453:epidemiology; D014096:Tooth, Supernumerary / Q000453:epidemiology*; D014097:Tooth, Unerupted / Q000453:epidemiology; D055815:Young Adult