title: Topographic analysis of maxillary premolars and molars and maxillary sinus using cone beam computed tomography.
abstract: OBJECTIVE
  This study evaluated the anatomical characteristics of the maxillary premolars and molars and the maxillary sinus using cone beam computed tomography (CBCT) for dental implant treatment.
  
  
  METHODS
  Ten linear items and 1 angular item on 30 sites in 30 patients were measured on 3-dimensional computed tomography images using CBCT. The vertical relationship between the maxillary sinus and the maxillary molars was classified into 5 categories.
  
  
  RESULTS
  The horizontal thickness of the buccal alveolar bone was thinnest on the maxillary first premolars, and the horizontal thickness of the palatal alveolar bone was thickest on the maxillary second molars. Type II was most common on the maxillary first molars. The internal angle at the maxillary premolars was significantly greater than that at the maxillary molars. The internal angle and vertical distance between the apex of the roots and the maxillary sinus floor showed a positive correlation on the maxillary first premolars (P = 0.003).
  
  
  CONCLUSIONS
  For the selection of an appropriate approach on dental implant treatment, the evaluation of maxillary premolars and molars using of CBCT can be recommended.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
authors.forename: Shin-Ichiro
authors.initials: S
authors.lastname: Yoshimine
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Nishihara
authors.forename: Etsuro
authors.initials: E
authors.lastname: Nozoe
authors.forename: Masako
authors.initials: M
authors.lastname: Yoshimine
authors.forename: Norifumi
authors.initials: N
authors.lastname: Nakamura
mesh_terms: D000328:Adult; D000368:Aged; D000539:Alveolar Process / Q000000981:diagnostic imaging; D019412:Anatomy, Cross-Sectional / Q000379:methods; D001641:Bicuspid / Q000000981:diagnostic imaging*; D002508:Cephalometry / Q000379:methods; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D015921:Dental Implants; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging*; D008443:Maxillary Sinus / Q000000981:diagnostic imaging*; D008875:Middle Aged; D008963:Molar / Q000000981:diagnostic imaging*; D009811:Odontometry / Q000379:methods; D010159:Palate / Q000000981:diagnostic imaging; D010347:Patient Care Planning; D019227:Tooth Apex / Q000000981:diagnostic imaging; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D014092:Tooth Root / Q000000981:diagnostic imaging; D055815:Young Adult
chemical_list: D015921:Dental Implants