title: [Clinical study of transcrestal maxillary sinus floor elevation with the disk-up sinus reamer].
abstract: OBJECTIVE
  To evaluate the clinical effect of the disk-up sinus reamer (DSR) applied to transcrestal maxillary sinus floor elevation with simultaneous placement of implants.
  
  
  METHODS
  Thirty-seven patients underwent transcrestal maxillary sinus floor elevation with fifty-one implants placed simultaneously using the DSR. The residual bone height (RBH) was 3 to 8 mm, (5.61 ± 1.61) mm on average. The safety of this technique and the pain index during the operation was evaluated. The final prostheses were restored in 3-6 months postoperatively. The follow-up period was 3 to 24 months. The stability and osseointegration of the implants were clinically evaluated, and the endo-sinus bone gain around the implants were measured.
  
  
  RESULTS
  The elevation height ranged from 2 to 8 mm, with an average of (4.75 ± 1.55) mm. There was no detectable sinus membrane perforation, no serious suffering or uncomfortable subjective sensation in any patients during operation with a pain index of (2.22 ± 0.98). During the follow-up period, no sinus complication was observed. Favorable osseointegration was obtained. There were no implants or prostheses which were loose or lost. The survival rate was 100%. The radiographic results demonstrated that the endo-sinus bone gain tended to reach stabilization after 6 months and the marginal bone loss was (1.20 ± 0.72) mm after 12 months.
  
  
  CONCLUSIONS
  Transcrestal maxillary sinus floor elevation with simultaneous implant placement by DSR is a safe, invasive and handy technique, with higher elevation height, fewer clinical complications and less pain. It shows satisfactory clinical results in short term and a long-term observation is still needed.
authors.affiliation: Center of Oral Implantology, The Affiliated Hospital of Medical College Qingdao University, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Xiao
authors.forename: Bao-Dong
authors.initials: BD
authors.lastname: Zhao
authors.forename: Wei-Ying
authors.initials: WY
authors.lastname: Wang
authors.forename: Ai-Ju
authors.initials: AJ
authors.lastname: Feng
authors.forename: Su-Wei
authors.initials: SW
authors.lastname: Guo
authors.forename: Xue-Jian
authors.initials: XJ
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D016348:Osseointegration; D010147:Pain Measurement; D011862:Radiography, Panoramic; D059546:Sinus Floor Augmentation / Q000295:instrumentation* / Q000379:methods; D016388:Tooth Loss / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D015921:Dental Implants