title: Predisposing factors for severe incisor root resorption associated with impacted maxillary canines.
abstract: BACKGROUND
  Severe incisor root resorption (SIRR) associated with impacted maxillary canines is rare but has important implications. Early diagnosis and treatment are imperative. In this investigation, we aimed to identify predisposing factors for impacted canine-linked SIRR.
  
  
  METHODS
  Clinical and radiographic data of 55 consecutive patients (77 canines) with SIRR of 96 incisors were compared with data from 57 consecutive control subjects (72 canines). The studied variables were age, sex, position of the impacted canine, size of the dental follicle, and incidence of anomalous lateral incisors.
  
  
  RESULTS
  Lateral incisors were more often affected than central incisors, and bilateral SIRR was common. When each variable was examined separately, SIRR was significantly associated with female sex, severely mesiodistally displaced and vertically positioned canines in the middle third of the adjacent incisor root, dental follicles wider than 2 mm, and normal lateral incisors. The multivariate statistical analysis showed that the risk for SIRR was significantly higher in female subjects (4.2 times) with enlarged dental follicles (8.3 times) and normal lateral incisors (5.8 times).
  
  
  CONCLUSIONS
  SIRR should be carefully screened in female patients with enlarged dental follicles and normal lateral incisors. A greater degree of canine displacement might also be associated with SIRR.
authors.affiliation: Associate professor and chair, Department of Orthodontics, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel. Electronic address: drchaushu@gmail.com.
authors.forename: Stella
authors.initials: S
authors.lastname: Chaushu
authors.affiliation: Postgraduate student, International Postgraduate Orthodontic Program, Department of Orthodontics, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel.
authors.forename: Karolina
authors.initials: K
authors.lastname: Kaczor-Urbanowicz
authors.affiliation: Associate professor and head, Department of Orthodontics, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Zadurska
authors.affiliation: Clinical associate professor emeritus, Department of Orthodontics, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel.
authors.forename: Adrian
authors.initials: A
authors.lastname: Becker
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000848:Anodontia / Q000150:complications; D002648:Child; D054893:Cone-Beam Computed Tomography / Q000379:methods; D003481:Cuspid / Q000000981:diagnostic imaging / Q000473:pathology*; D003795:Dental Sac / Q000000981:diagnostic imaging / Q000473:pathology; D042241:Early Diagnosis; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000473:pathology; D009811:Odontometry / Q000379:methods; D016300:Radiography, Bitewing / Q000379:methods; D011862:Radiography, Panoramic / Q000379:methods; D012307:Risk Factors; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000209:etiology*; D012737:Sex Factors; D014079:Tooth Eruption, Ectopic / Q000150:complications; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000473:pathology; D014095:Tooth, Impacted / Q000150:complications* / Q000000981:diagnostic imaging; D055815:Young Adult