title: Maxillary sinus floor augmentation surgery with autogenous bone grafts as ceiling: a pilot study and test of principle.
abstract: BACKGROUND
  Studies have pointed out that the mere elevation of the maxillary sinus membrane might suffice to allow for bone formation indicating the additional use of augmentation materials to be redundant.
  
  
  OBJECTIVE
  The purpose of this study was to assess whether elevation of the sinus mucosal lining combined with applying an autologous bone graft as a ceiling and placement of a short implant would allow for bone formation around the implant thus surpassing the need for applying augmentation materials around the installed implants.
  
  
  METHODS
  Fourteen consecutive patients were subjected to maxillary sinus floor elevation surgery and simultaneous placement of an implant. Using the lateral bone-wall window technique, the membrane was exposed and elevated. Next, a bone graft taken from the zygomatic rim was placed as a ceiling above the inserted implant to ensure that the sinus membrane would not collapsed around a significant part of the implant. Finally, the bone window was returned in place. After connecting the healing abutment, the wound was closed.
  
  
  RESULTS
  All implants were stable and no implants were lost. There were no complications after harvesting the bone graft. Radiographic evaluation showed a bone gain of 3.2 ± 0.9 mm after 3 months and 3.6 ± 0.9 mm after 1 year. Less than 6% of the implant was not covered by bone after 1 year.
  
  
  CONCLUSIONS
  Maxillary sinus membrane elevation and simultaneous placement of short endosseous implants with a bone graft as a ceiling on top of the implant result in predictable bone formation around the implant and good osseointegration on radiographs.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands. g.m.raghoebar@kchir.umcg.nl
authors.forename: Gerry M
authors.initials: GM
authors.lastname: Raghoebar
authors.forename: Henny J A
authors.initials: HJ
authors.lastname: Meijer
authors.forename: Gerdien
authors.initials: G
authors.lastname: Telleman
authors.forename: Arjan
authors.initials: A
authors.lastname: Vissink
mesh_terms: D000328:Adult; D064592:Autografts / Q000637:transplantation*; D016025:Bone Transplantation / Q000379:methods*; D059605:Dental Implant-Abutment Design; D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D009297:Nasal Mucosa / Q000000981:diagnostic imaging / Q000473:pathology; D016348:Osseointegration / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D010865:Pilot Projects; D011859:Radiography; D059546:Sinus Floor Augmentation / Q000379:methods*; D020858:Tissue and Organ Harvesting / Q000379:methods; D060053:Transplant Donor Site / Q000601:surgery; D016896:Treatment Outcome; D015050:Zygoma / Q000601:surgery
chemical_list: D015921:Dental Implants