title: Taurodontism, Root Dilaceration, and Tooth Transposition: A Radiographic Study of a Population With Nonsyndromic Cleft Lip and/or Palate.
abstract: In an effort to contribute to proper dental planning and define possible dental phenotypes of nonsyndromic cleft lip and/or palate (CL/P), this study aimed to investigate the occurrence of taurodontism, root dilaceration, and tooth transposition in persons with nonsyndromic CL/P, specifically analyzing the differences among gender, cleft types, and the most affected teeth.
  
  
  
  This retrospective study analyzed 974 panoramic x-rays from nonsyndromic Brazilians older than 16 years and categorized into the following four groups: group 1, 250 persons with unilateral cleft lip and palate; group 2, 250 persons with unilateral cleft lip; group 3, 224 persons with cleft palate; and a control group of 250 persons without clefts. Radiographs were digitalized with a scanner and analyzed.
  
  
  
  In the Brazilian population studied, the prevalence of taurodontism was 60.4% in group 1, 62.4% in group 2, 67.0% in group 3, and 42.8% in the control group. Root dilacerations had a prevalence of 31.2% in group 1, 29.6% in group 2, 26.3% in group 3, and 27.2% in the control group. The teeth most affected by taurodontism were 17 and 27; whereas root dilacerations were most common in teeth 38 and 48. No tooth transpositions were found in any radiograph analyzed.
  
  
  
  Taurodontism is significantly more prevalent in Brazilians with nonsyndromic CL/P than in persons without clefts; whereas the prevalence of root dilaceration no different from that in the control group. However, root dilacerations in anterior teeth were increased in groups 1 and 2 when compared to the control group.
authors.forename: Giovana Maria
authors.initials: GM
authors.lastname: Weckwerth
authors.forename: Carlos F
authors.initials: CF
authors.lastname: Santos
authors.forename: Daniel T
authors.initials: DT
authors.lastname: Brozoski
authors.forename: Bruna S
authors.initials: BS
authors.lastname: Centurion
authors.forename: Otávio
authors.initials: O
authors.lastname: Pagin
authors.forename: José Roberto P
authors.initials: JR
authors.lastname: Lauris
authors.forename: Izabel Maria M
authors.initials: IM
authors.lastname: Carvalho
authors.forename: Lucimara T
authors.initials: LT
authors.lastname: Neves
mesh_terms: D001938:Brazil; D002971:Cleft Lip / Q000473:pathology*; D002972:Cleft Palate / Q000473:pathology*; D003786:Dental Pulp Cavity / Q000002:abnormalities* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D014071:Tooth Abnormalities / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000002:abnormalities*
keywords: cleft lip; cleft palate; dental anomalies; root dilaceration; taurodontism