title: Hypodontia and supernumerary and impacted teeth in children with various types of clefts.
abstract: BACKGROUND
  The purpose of this study was to determine the prevalence of hypodontia, hyperdontia, and impacted teeth in children with various types of clefts.
  
  
  METHODS
  This study sample consisted of 201 cleft patients including 131 male subjects with a mean age of 12.3 ± 4 years and 70 female subjects with a mean age of 12.6 ± 3.9 years. Charts, models, radiographs, and intraoral photographs were used for the study. t tests, chi-square tests, and binomial tests were used for assessment of the data.
  
  
  CONCLUSIONS
  Hypodontia was found in 129 subjects (64.1%). The chi-square test showed no statistically significant difference between the type of cleft and hypodontia (P <0.319). The binomial test showed that the frequencies of subjects with hypodontia were significantly higher in both unilateral and bilateral cleft lip and palate patients (P <0.015 and P <0.001, respectively). Hyperdontia and impacted teeth were also found to occur mostly in the maxillary arch, and maxillary canines were the most commonly impacted teeth in both unilateral and bilateral cleft lip and palate patients.
authors: Associate professor, fellow of orthognathic surgery, Department of Orthodontics, Dental Branch, Center of Craniofacial Research, Islamic Azad University, Tehran, Iran. Electronic address: info@jamilian.net.
authors: Abdolreza
authors: A
authors: Jamilian
authors: Assistant professor, Department of Gynecology, Arak University of Medical Sciences, Arak, Iran.
authors: Mehri
authors: M
authors: Jamilian
authors: Dentist, Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
authors: Alireza
authors: A
authors: Darnahal
authors: Postgraduate student, Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors: Roya
authors: R
authors: Hamedi
authors: Postgraduate student, Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
authors: Mobina
authors: M
authors: Mollaei
authors: Dentist, Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
authors: Shabnam
authors: S
authors: Toopchi
mesh_terms: D000293:Adolescent; D000328:Adult; D000848:Anodontia / Q000453:epidemiology*; D001641:Bicuspid / Q000002:abnormalities; D002508:Cephalometry / Q000706:statistics & numerical data; D002648:Child; D002675:Child, Preschool; D002971:Cleft Lip / Q000453:epidemiology*; D002972:Cleft Palate / Q000453:epidemiology*; D003481:Cuspid / Q000473:pathology; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities; D007492:Iran / Q000453:epidemiology; D008297:Male; D008437:Maxilla / Q000473:pathology; D003765:Models, Dental / Q000706:statistics & numerical data; D023861:Photography, Dental / Q000706:statistics & numerical data; D015995:Prevalence; D016300:Radiography, Bitewing / Q000706:statistics & numerical data; D011862:Radiography, Panoramic / Q000706:statistics & numerical data; D014095:Tooth, Impacted / Q000453:epidemiology*; D014096:Tooth, Supernumerary / Q000453:epidemiology*; D055815:Young Adult