title: Analysis of correlation between initial alveolar bone density and apical root resorption after 12 months of orthodontic treatment without extraction.
abstract: OBJECTIVE
  The aim of the present study was to investigate the correlation between initial alveolar bone density of upper central incisors (ABD-UI) and external apical root resorption (EARR) after 12 months of orthodontic movement in cases without extraction.
  
  
  METHODS
  A total of 47 orthodontic patients 11 years old or older were submitted to periapical radiography of upper incisors prior to treatment (T1) and after 12 months of treatment (T2). ABD-UI and EARR were measured by means of densitometry.
  
  
  RESULTS
  No statistically significant correlation was found between initial ABD-UI and EARR at T2 (r = 0.149; p = 0.157).
  
  
  CONCLUSIONS
  Based on the present findings, alveolar density assessed through periapical radiography is not predictive of root resorption after 12 months of orthodontic treatment in cases without extraction.
authors.affiliation: State University of Maringá.
authors.forename: Paula Cabrini
authors.initials: PC
authors.lastname: Scheibel
authors.affiliation: Department of Dentistry, State University of Maringá.
authors.forename: Adilson Luiz
authors.initials: AL
authors.lastname: Ramos
authors.affiliation: Department of Dentistry, State University of Maringá.
authors.forename: Lilian Cristina Vessoni
authors.initials: LC
authors.lastname: Iwaki
authors.affiliation: State University of São Paulo.
authors.forename: Kelly Regina
authors.initials: KR
authors.lastname: Micheletti
mesh_terms: D000293:Adolescent; D000328:Adult; D000539:Alveolar Process / Q000000981:diagnostic imaging*; D015519:Bone Density / Q000502:physiology*; D002648:Child; D006801:Humans; D007180:Incisor / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D008875:Middle Aged; D009811:Odontometry / Q000379:methods; D011446:Prospective Studies; D016300:Radiography, Bitewing; D012391:Root Resorption / Q000209:etiology*; D019227:Tooth Apex / Q000000981:diagnostic imaging*; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D019228:Tooth Crown / Q000000981:diagnostic imaging; D014087:Tooth Movement Techniques / Q000009:adverse effects / Q000379:methods*; D014092:Tooth Root / Q000000981:diagnostic imaging; D055815:Young Adult