title: Cross-sectional study of correlation between mandibular incisor crowding and third molars in young Brazilians.
abstract: OBJECTIVE
  The aim of this study was to evaluate transversally the clinical correlation between lower incisor crowding and mandible third molar.
  
  
  METHODS
  Three hundred healthy volunteers (134 male and 166 female), aged 20.4 (±2.4) years-old were submitted to a complete clinical examination and filled up a questionnaire about gender, age, total teeth number and presence or absence of superior and inferior third molar. After a recent panoramic radiography were evaluated. The multiple logistic regression showed that none of the studied factors influenced the mandibular incisor crowding.
  
  
  RESULTS
  The proportion of both molars present or both absent was higher than the other conditions (Chi-square, p<.0001). The multiple logistic regression showed that any of the studied factors, influenced (p>.05) the mandibular incisor crowding. Despite the statistical significance, wear orthodontics appliances showed a little correlation (odds ratios < 1.0) in the mandibular incisor crowding.
  
  
  CONCLUSIONS
  Presence of maxillary and/or mandibular third molars has no relation with the lower incisor crowding.
authors: Department of Morphology, Anatomy area, Piracicaba Dental School, State University of Campinas - UNICAMP, Brazil.
authors: Lilian-Harumi
authors: LH
authors: Karasawa
authors: Ana-Cláudia
authors: AC
authors: Rossi
authors: Francisco-Carlos
authors: FC
authors: Groppo
authors: Felippe-Bevilacqua
authors: FB
authors: Prado
authors: Paulo-Henrique-Ferreira
authors: PH
authors: Caria
mesh_terms: D001938:Brazil; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D008297:Male; D008310:Malocclusion / Q000473:pathology*; D008334:Mandible; D008964:Molar, Third / Q000002:abnormalities*; D055815:Young Adult
references: Am J Orthod. 1982 Feb;81(2):130-9
references: 6960702
references: Dent Update. 2002 Jun;29(5):234-8
references: 12096382
references: J Am Dent Assoc. 1992 Aug;123(8):75-9
references: 1506593
references: J Contemp Dent Pract. 2004 Aug 15;5(3):66-73
references: 15318258
references: Eur J Orthod. 2005 Oct;27(5):518-23
references: 16076878
references: Am J Orthod Dentofacial Orthop. 1990 Apr;97(4):323-35
references: 2321598
references: Angle Orthod. 2009 Nov;79(6):1139-42
references: 19852606
references: Am J Orthod Dentofacial Orthop. 2007 Jul;132(1):43-8
references: 17628249
references: Cochrane Database Syst Rev. 2012 Jun 13;(6):CD003879
references: 22696337
references: J Dent. 1997 Mar;25(2):167-9
references: 9105149
references: Br J Orthod. 1998 May;25(2):117-22
references: 9668994
references: Cranio. 1994 Jan;12(1):23-7
references: 8181084
references: Br J Orthod. 1991 Feb;18(1):59-66
references: 2025624
references: Am J Orthod Dentofacial Orthop. 2012 Feb;141(2):146-52
references: 22284281
references: Health Technol Assess. 2000;4(15):1-55
references: 10932022
references: Am J Orthod Dentofacial Orthop. 2003 May;123(5):562-7
references: 12750677
references: Ann Acad Med Singap. 1995 Jan;24(1):129-37
references: 7605082
references: Stomatologija. 2006;8(3):80-4
references: 17191063
references: Aust Dent J. 1999 Dec;44(4):233-7
references: 10687230