title: A comparative study of odontogenic keratocysts associated with and not associated with an impacted mandibular third molar.
abstract: OBJECTIVE
  The purpose of this study was to compare odontogenic keratocysts associated with and not associated with an impacted mandibular third molar.
  
  
  METHODS
  Panoramic radiographs of odontogenic keratocysts associated with impacted mandibular third molars (15 cysts, associated group) were compared with radiographs of odontogenic keratocysts not associated with impacted mandibular third molars (25 cysts, nonassociated group). The radiographic images were analyzed with reference to the patients' age and sex.
  
  
  RESULTS
  The mean age of patients in the associated group was lower than that of patients in the nonassociated group. The mean area of the cysts in the associated group was larger than that of those in the nonassociated group. The patients' ages did not significantly correlate to the areas of either kind of cyst.
  
  
  CONCLUSIONS
  The odontogenic keratocysts in the associated group had a tendency toward rapid growth in the patients' youth.
authors.affiliation: Department of Oral and Maxillofacial Surgery and Biopathy, Graduate School of Medicine and Dentistry, Okayama University, Japan. gtsuka@md.okayama-u.ac.jp
authors.forename: Goichi
authors.initials: G
authors.lastname: Tsukamoto
authors.forename: Takahide
authors.initials: T
authors.lastname: Makino
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kikuchi
authors.forename: Koji
authors.initials: K
authors.lastname: Kishimoto
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Nishiyama
authors.forename: Akira
authors.initials: A
authors.lastname: Sasaki
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Matsumura
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging; D008875:Middle Aged; D008964:Molar, Third / Q000000981:diagnostic imaging / Q000473:pathology*; D009807:Odontogenic Cysts / Q000150:complications* / Q000000981:diagnostic imaging; D011336:Probability; D011862:Radiography, Panoramic; D012737:Sex Factors; D013223:Statistics as Topic; D019228:Tooth Crown / Q000000981:diagnostic imaging; D014095:Tooth, Impacted / Q000150:complications* / Q000000981:diagnostic imaging