title: Maxillary sinus floor augmentation using blood without graft material. Preliminary results in 10 patients.
abstract: OBJECTIVE
  The maxillary sinus lift is recognized and stable, and there have been different innovations to optimize the technique. The aim of this study was to investigate the maxillary sinus lift technique with the use of a blood clot and without the use of a bone graft.
  
  
  METHODS
  Ten patients were recruited for a unilateral sinus lift; patients without sinus pathology or other contraindication were selected. The maxillary sinus was accessed conventionally under local anesthesia followed by an osteotomy and a 1-cm(2) bony window access. The sinus membrane was detached and the window was repositioned above and stabilized with a 12- or 14-mm osteosynthesis screw introduced through the alveolar ridge. Dental implants were installed in the second surgical stage. Standardized panoramic radiographic checks were performed at every stage.
  
  
  RESULTS
  Seven completely edentulous patients and 3 partially dentate patients were treated surgically. From the first to the second surgery, a bone gain of 2.37 mm was obtained, although loss of bone height was observed in 1 completely edentulous patient. In 7 patients, it was not possible to install the implants owing to insufficient bone height or inadequate bone quality.
  
  
  CONCLUSIONS
  The protocol used in this investigation failed in the bone increase required for implant installation.
authors.affiliation: Assistant Professor, Division of Oral and Maxillofacial Surgery, Universidade Estadual do Oeste do Paraná, Brazil.
authors.forename: Greison R
authors.initials: GR
authors.lastname: de Oliveira
authors.forename: Sergio
authors.initials: S
authors.lastname: Olate
authors.forename: Lucas
authors.initials: L
authors.lastname: Cavalieri-Pereira
authors.forename: Leandro
authors.initials: L
authors.lastname: Pozzer
authors.forename: Luciana
authors.initials: L
authors.lastname: Asprino
authors.forename: Marcio
authors.initials: M
authors.lastname: de Moraes
authors.forename: Jose Ricardo
authors.initials: JR
authors.lastname: de Albergaría-Barbosa
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D000539:Alveolar Process / Q000601:surgery; D001777:Blood Coagulation / Q000502:physiology*; D001862:Bone Resorption / Q000209:etiology; D001863:Bone Screws; D016025:Bone Transplantation; D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000601:surgery; D007576:Jaw, Edentulous, Partially / Q000601:surgery; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D008443:Maxillary Sinus / Q000000981:diagnostic imaging; D008567:Membranes, Artificial; D008875:Middle Aged; D009297:Nasal Mucosa / Q000473:pathology; D010012:Osteogenesis / Q000502:physiology; D010027:Osteotomy / Q000379:methods; D011862:Radiography, Panoramic; D059546:Sinus Floor Augmentation / Q000379:methods*; D013524:Surgical Flaps
chemical_list: D015921:Dental Implants; D008567:Membranes, Artificial