title: The significance of cone beam computed tomography for the visualization of anatomical variations and lesions in the maxillary sinus for patients hoping to have dental implant-supported maxillary restorations in a private dental office in Japan.
abstract: OBJECTIVE
  The purpose of the present study was to elucidate the significance of cone bean computed tomography (CBCT) for patients hoping to undergo implant-supported restorations of the maxilla. Therefore, two studies were planned. One was to compare the prevalence of anatomic variations and lesions in the maxillary sinus on CBCT of patients hoping to undergo implant-supported restorations of the maxilla with that in patients with other chief complaints in a private dental office in Japan. The other study was to elucidate the limitations of panoramic radiographs in the detection of anatomic variations and lesions in the maxillary sinus.
  
  
  METHODS
  Sixty-one pairs of panoramic radiographs and CBCT were retrospectively analyzed in two groups of patients, those who hoped to undergo implant-supported restorations in the maxilla (Implant group) and those who did not (Non-implant group). The presence of anatomic variations and lesions in the maxillary sinus were analyzed.
  
  
  RESULTS
  The detection rate of mucosal thickening was significantly higher in the Implant group than in the Non-implant group. The detection rates for the features analyzed were significantly lower on panoramic radiographs. In particular, the detection rates of internal and anterior locations of some features were noticeably lower on panoramic radiographs. A significant relationship was found between the change in the detection rate on panoramic radiographs and the widths of mucosal thickening or the lengths of the major axis of SOLs in the maxillary sinus. If the width of mucosal thickening or the length of the major axis of SOLs was <3 mm or <4 mm, respectively, the detection rate on panoramic radiographs was significantly decreased.
  
  
  CONCLUSIONS
  CBCT is important for patients hoping to undergo implant-supported restorations of the maxilla because of the mucosal thickening in the maxillary sinus in such patients and their lower detection rates on panoramic radiographs.
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Shiki
authors.forename: Tatsurou
authors.initials: T
authors.lastname: Tanaka
authors.forename: Shinji
authors.initials: S
authors.lastname: Kito
authors.forename: Nao
authors.initials: N
authors.lastname: Wakasugi-Sato
authors.forename: Shinobu
authors.initials: S
authors.lastname: Matsumoto-Takeda
authors.forename: Masafumi
authors.initials: M
authors.lastname: Oda
authors.forename: Shun
authors.initials: S
authors.lastname: Nishimura
authors.affiliation: Division of Oral and Maxillofacial Radiology, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu 803-8580, Japan. rad-mori@kyu-dent.ac.jp.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Morimoto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008437:Maxilla; D008443:Maxillary Sinus / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011331:Private Practice; D011862:Radiography, Panoramic
chemical_list: D015921:Dental Implants