title: Eruption prediction of mandibular premolars associated with dentigerous cysts.
abstract: OBJECTIVE
  A tooth with a dentigerous cyst (DC) does not always erupt by marsupialization. The eruption duration and conditions of DC-associated premolars were examined to predict such eruption following marsupialization.
  
  
  METHODS
  The eruption and conditions including depth, root formation, inclination, and eruption space were examined retrospectively in 21 DC-associated mandibular premolars using dental and panoramic radiograms.
  
  
  RESULTS
  Fifteen of 21 premolars erupted half within 3 months and all 15 erupted completely within 10 months after marsupialization, without orthodontic traction. The age of the patients, tooth depth, and inclination were significantly different between the erupted and non-erupted groups, whereas there was no significant difference in the root formation or the eruption space between the 2 groups.
  
  
  CONCLUSIONS
  The successful eruption of a DC-associated premolar can be predicted within 3 months after marsupialization. Furthermore, the eruption may be affected by the patient's age, tooth depth, and tooth inclination.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Higashi-ku, Fukuoka, Japan.
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Yahara
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Kubota
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yamashiro
authors.forename: Kanemitsu
authors.initials: K
authors.lastname: Shirasuna
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001641:Bicuspid / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002648:Child; D003803:Dentigerous Cyst / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D008297:Male; D008336:Mandibular Diseases / Q000503:physiopathology / Q000601:surgery*; D009805:Odontogenesis / Q000502:physiology; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D019227:Tooth Apex / Q000000981:diagnostic imaging; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D019228:Tooth Crown / Q000000981:diagnostic imaging; D014078:Tooth Eruption / Q000502:physiology*; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000503:physiopathology; D014095:Tooth, Impacted / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D014097:Tooth, Unerupted / Q000503:physiopathology