title: [Clinical application of sinus floor elevation guided by cone-beam computer tomography].
abstract: OBJECTIVE
  To investigate the value of using con-beam computer tomography (CBCT) to evaluate bone volume in the edentulous area of posterior maxilla, and guide sinus floor elevation.
  
  
  METHODS
  Twenty eight patients who planed to receive dental implant in the posterior maxilla underwent CBCT scan. After analysis of residual bone height, 19 patients with 5-10 mm bone height below the sinus floor underwent transcrestal sinus floor elevation, while 7 patients with less than 5 mm bone height below the sinus floor underwent lateral window sinus floor elevation. The treatment outcomes were assessed postoperatively.
  
  
  RESULTS
  CBCT detected bone deficiency in the posterior maxillary alveolar bone in 26 patients, mucus cyst of maxillary sinus in 1 patient and sinus septa in 2 patients. Nineteen patients underwent transcrestal sinus floor elevation, and 7 patients underwent lateral window sinus floor elevation. All patients completed final dental restorations, and the restorations achieved satisfactory function and esthetic.
  
  
  CONCLUSIONS
  CBCT imaging plays an important role in determining bone quality in posterior maxilla and guiding sinus floor elevation. Supported by Social Undertakings Technological Innovation and Demonstration Program of Nantong City (HS2011035).
authors.affiliation: Department of Oral Implantology,Stomatology Hospital of Nantong City. Nantong 226001, Jiangsu Province, China.E-mail:ntskqgyhmwk@126.com.
authors.forename: Wen-qing
authors.initials: WQ
authors.lastname: Zhou
authors.forename: Jan-rong
authors.initials: JR
authors.lastname: Chen
authors.forename: Yong-qiang
authors.initials: YQ
authors.lastname: Zhou
authors.forename: Yan-ping
authors.initials: YP
authors.lastname: Wu
authors.forename: Lu
authors.initials: L
authors.lastname: Chen
authors.forename: Shui-qing
authors.initials: SQ
authors.lastname: Ding
mesh_terms: D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D006801:Humans; D008437:Maxilla; D008443:Maxillary Sinus; D059546:Sinus Floor Augmentation; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants