title: Influences of Schneiderian membrane conditions on the early outcomes of osteotome sinus floor elevation technique: a prospective cohort study in the healing period.
abstract: OBJECTIVE
  To radiographically investigate early outcomes of osteotome sinus floor elevation in the healing phase utilizing cone beam computed tomography and evaluate influences of Schneiderian membrane conditions.
  
  
  METHODS
  One hundred patients were consecutively recruited for osteotome sinus floor elevation (OSFE) surgery using deproteinized bone mineral. CBCT was taken prior to (T0), immediately post-operatively (T1), and after the healing period (T2). Linear and volumetric measurements of the elevated region from T0 to T1 were performed for evaluation on computed tomography (CT).
  
  
  RESULTS
  Osteotome sinus floor elevation were performed in 100 patients. One implant of each patient was selected. Mean residual bone height (RH) was 7.21 ± 1.12 mm. Mean sinus floor elevation height (SE) was 4.81 ± 0.75 mm. The mean endo-sinus bone gain after the healing period was 3.25 ± 0.83 mm. Pre-opterative CBCT scans revealed that 72 patients had a normal sinus membrane in osteotome region, 13 patients presented with flat thickened mucosa and 15 patients with antral pseudocysts. There is no significant difference in sinus mucosa elevation height, bone graft volume and new bone formation in group of Thickening membrane and Antral pseudocysts compared with normal.
  
  
  CONCLUSIONS
  The radiographical results show that OSFE is a safe and predictable surgical procedure in residual bone height of 7.21 ± 1.12 mm. Mild flat thickening (>2 and <5 mm) and antral pseudocysts in a small size without clinical symptoms may not be contraindications to OSFE surgery.
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Qin
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Sheng-Xiao
authors.initials: SX
authors.lastname: Lin
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Zheng-Ze
authors.initials: ZZ
authors.lastname: Guo
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Ningbo
authors.initials: N
authors.lastname: Zhao
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Ying-Liang
authors.initials: YL
authors.lastname: Song
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Xie
authors.affiliation: Department of Oral Implants, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: De-Hua
authors.initials: DH
authors.lastname: Li
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery; D063166:Maxillary Osteotomy; D008875:Middle Aged; D009297:Nasal Mucosa / Q000000981:diagnostic imaging; D011446:Prospective Studies; D059546:Sinus Floor Augmentation / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult
keywords: osteotome sinus floor elevation; prospective cohort; radiographic evaluation