title: Evaluation of sinus floor augmentation with simultaneous implant placement using platelet-rich fibrin as sole grafting material.
abstract: OBJECTIVE
  The objective of this study was to evaluate sinus floor augmentation with simultaneous implant placement using platelet-rich fibrin (PRF) as the only grafting material.
  
  
  METHODS
  This study included patients who underwent sinus floor augmentation with simultaneous implant placement using PRF as the sole filling material between July 2009 and January 2011 at the Department of Oral and Maxillofacial Surgery, Nagasaki University Hospital. For each patient, presurgical and postsurgical (6 months after the surgery) radiography and computed tomographic scanning were performed to assess bone formation at the implant sites. The density (in Hounsfield units [HU]) of the newly formed bone and the bone height from the sinus floor to the alveolar crest where implants were inserted were measured using implant planning software (Simplant, Materialise Dental).
  
  
  RESULTS
  Nine sinus floor augmentations were performed, and 17 implants were placed in six patients. The mean residual bone height between the sinus floor and alveolar crest was 4.28 ± 1.00 mm (range, 1.9 to 6.1 mm) prior to surgery and 11.8 ± 1.67 mm (range, 9.1 to 14.1 mm) after surgery. The alveolar bone ridge was wide enough for implant placement in all cases. The mean density of the newly gained bone around the implants was 323 ± 156.2 HU (range, 185 to 713 HU). All implants were clinically stable at the time of abutment insertion, 6 months after sinus augmentation.
  
  
  CONCLUSIONS
  Sinus elevation with simultaneous implant placement using PRF as the only filling material may promote natural bone regeneration.
authors: Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Medicine, Nagasaki, Japan. n-tajima@nagasaki-u.ac.jp
authors: Nobutaka
authors: N
authors: Tajima
authors: Seigo
authors: S
authors: Ohba
authors: Takashi
authors: T
authors: Sawase
authors: Izumi
authors: I
authors: Asahina
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000033:anatomy & histology; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D015519:Bone Density; D001861:Bone Regeneration / Q000502:physiology*; D003758:Dental Implantation, Endosseous / Q000379:methods*; D005260:Female; D005337:Fibrin / Q000502:physiology / Q000627:therapeutic use*; D006801:Humans; D008443:Maxillary Sinus / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods; D017713:Platelet Transfusion / Q000379:methods*; D011862:Radiography, Panoramic; D059546:Sinus Floor Augmentation / Q000379:methods*; D014057:Tomography, X-Ray Computed
chemical_list: D005337:Fibrin