title: Atraumatic maxillary sinus elevation using threaded bone dilators for immediate implants. A three-year clinical study.
abstract: OBJECTIVE
  The aim of this study was to evaluate the efficacy of sinus floor elevation using sequential bone dilators.
  
  
  METHODS
  Thirty patients took part in the study (18 women and 12 men) with ages ranging between thirty-six and sixty-three years, selected according to inclusion and exclusion criteria, who showed a bone deficit in the upper posterior alveolar margin of 5-8 mm in height. Sixty expanded platform internal connection implants were placed with diameters of 4/5/4 mm and lengths varying between 10 (n=10) and 11.5 mm (n= 50).
  
  
  RESULTS
  Data obtained were analyzed using SPSS 15.0 software. The average intra-sinus bone gain with MP3 biomaterial of porcine origin was 4.13 +/- 0.97 SD mm at the moment of implant placement, 3.90 +/- 1.15 SD mm after twelve months, 3.74 +/- 1.05 SD mm after 24 months and 3.62 +/- 1.75 SD mm after 36 months. Two implants were lost at the moment of prosthesis placement.
  
  
  CONCLUSIONS
  Alveolar lifting technique in the upper maxilla using bone dilators achieved a 96.6 % implant success rate after a three-year follow-up. Intra-sinus bone biomaterial remodeling was 0.51 +/- 0.08 mm from day zero to the thirty-six-month follow-up. This is a procedure that reduces the amount of surgery necessary and is of both aesthetic and functional benefit to the patient.
authors.affiliation: Faculty of Medicine and Dentistry, University of Murcia, Spain. joseluis.calvo@um.es
authors.forename: José-Luis
authors.initials: JL
authors.lastname: Calvo-Guirado
authors.forename: Gerardo
authors.initials: G
authors.lastname: Gómez-Moreno
authors.forename: Laura
authors.initials: L
authors.lastname: López-Marí
authors.forename: Antonio-José
authors.initials: AJ
authors.lastname: Ortiz-Ruiz
authors.forename: Javier
authors.initials: J
authors.lastname: Guardia-Muñoz
mesh_terms: D000328:Adult; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus; D008875:Middle Aged; D011446:Prospective Studies; D013997:Time Factors; D015625:Tissue Expansion Devices
chemical_list: D015921:Dental Implants