title: Dental implants placed on bone subjected to vertical alveolar distraction show the same performance as those placed on primitive bone.
abstract: BACKGROUND
  Vertical osteogenic alveolar distraction (VOAD) allows for the augmentation of the alveolar ridge for the placement of dental implants in atrophic alveolar ridges. The goal of this paper is to assess long-term peri-implant bone resorption in implants placed on bones subjected to VOAD, comparing it with a group of patients who had implants placed directly on the alveolar bone without previous bone regeneration.
  
  
  METHODS
  We conducted a follow-up study on 32 patients who were divided into two groups: The Distraction Group (14 patients), and the Distraction-Free Group (18 patients), who received a total of 100 implants. Peri-implant bone loss was measured by means of panoramic X-rays, at the time of loading and one year later, and in 35 implants of each group after 3 years of functional loading.
  
  
  RESULTS
  The peri-implant bone resorption (PBR) average observed in the Distraction Group at the time of prosthetic placement is higher (0.50 ± 0.09 mm) than in the Distraction-Free Group (0.25 ± 0.06 mm), showing statistically significant results (p=0.047). PBR levels 1 year after loading were the same for both groups (0.66 mm). At 3 years, they were higher in the Distraction Group (1.03 ± 0.22 mm vs. 0.68 ± 0.08 mm).
authors.affiliation: Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Institute of Sanitary Research of Santiago, Santiago de Compostela, Spain. perezsayans@gmail.com
authors.forename: Mario
authors.initials: M
authors.lastname: Pérez-Sayáns
authors.forename: María De Los Ángeles
authors.initials: Mde L
authors.lastname: León-Camacho
authors.forename: José-Manuel
authors.initials: JM
authors.lastname: Somoza-Martín
authors.forename: Beatriz
authors.initials: B
authors.lastname: Fernández-González
authors.forename: Silvia
authors.initials: S
authors.lastname: Blanes-Vázquez-Gundín
authors.forename: José-Manuel
authors.initials: JM
authors.lastname: Gándara-Rey
authors.forename: Abel
authors.initials: A
authors.lastname: García-García
mesh_terms: D000328:Adult; D000368:Aged; D000539:Alveolar Process / Q000601:surgery*; D001862:Bone Resorption; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D019857:Osteogenesis, Distraction
chemical_list: D015921:Dental Implants