title: Positional changes of the third molar in orthodontically treated patients.
abstract: OBJECTIVE
  Over the years, the effects of the third molars eruption on the dental arches have been studied extensively. Still, literature provides less data regarding the effects of the orthodontic treatment on the third molars position. The aim of our study was to assess the positional changes of the third molars relative to the occlusal plane and to the second molar long axis, changes occurred during orthodontic treatment performed with or without premolar extractions.
  
  
  METHODS
  This study included 20 orthodontic treated patients: 10 of them with premolar extractions and 10 without premolar extractions. The pretreatment and post treatment panoramic radiographs were analyzed, and the angles between the third molar long axis and the occlusal plane and between the long axis of the third molar and the long axis of the second molar were measured.
  
  
  RESULTS
  Changes in third molar position, from pretreatment to post treatment, for the two groups of patients were evaluated by using the Student's t-test. The results of the statistical analysis revealed an improvement in third molars position, the best results were seen in the lower third molars, in the group of patients treated with premolar extractions.
authors.affiliation: Department of Orthodontics and Dento-Facial Orthopedics, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania. ana.balanescu@yahoo.com
authors.forename: A M
authors.initials: AM
authors.lastname: Mihai
authors.forename: I R
authors.initials: IR
authors.lastname: Lulache
authors.forename: R
authors.initials: R
authors.lastname: Grigore
authors.forename: A S
authors.initials: AS
authors.lastname: Sanabil
authors.forename: S
authors.initials: S
authors.lastname: Boiangiu
authors.forename: E
authors.initials: E
authors.lastname: Ionescu
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000601:surgery; D006801:Humans; D008964:Molar, Third / Q000033:anatomy & histology*; D055815:Young Adult
keywords: Third molar; extraction; premolar
references.citation: Eur J Orthod. 2005 Dec;27(6):590-6
references.pmid: 16009666
references.citation: Med Oral Patol Oral Cir Bucal. 2010 Sep 01;15(5):e760-6
references.pmid: 20383098
references.citation: Angle Orthod. 1973 Apr;43(2):191-3
references.pmid: 4511998
references.citation: Angle Orthod. 1978 Jan;48(1):39-48
references.pmid: 272130
references.citation: Angle Orthod. 1975 Jul;45(3):153-8
references.pmid: 1056712
references.citation: Angle Orthod. 1977 Oct;47(4):249-55
references.pmid: 270293
references.citation: Angle Orthod. 1974 Apr;44(2):141-5
references.pmid: 4524470
references.citation: Am J Orthod Dentofacial Orthop. 2003 Feb;123(2):138-45
references.pmid: 12594419
references.citation: Angle Orthod. 1970 Jul;40(3):226-30
references.pmid: 5269954
references.citation: Angle Orthod. 1978 Jul;48(3):187-93
references.pmid: 280126
references.citation: Angle Orthod. 1989 Winter;59(4):291-4
references.pmid: 2596751
references.citation: Angle Orthod. 2009 Nov;79(6):1143-8
references.pmid: 19852607
references.citation: Angle Orthod. 1973 Jul;43(3):271-8
references.pmid: 4515773
references.citation: Angle Orthod. 1992 Summer;62(2):135-8
references.pmid: 1626747