title: Ridge preservation surgery after single and multiple adjacent tooth extractions: a microcomputed tomography study in dogs.
abstract: OBJECTIVE
  The aim of this study was to determine, before implant placement, the outcome of ridge preservation surgery after extractions of one or more adjacent teeth on the dimensions of the edentulous ridge.
  
  
  METHODS
  Nineteen extraction sites in four dogs were randomly divided into three groups: group 1 = single premolars (n = 7 sites); group 2 = two adjacent premolars (n = 6 sites); group 3 = three adjacent premolars (n = 6 sites). Extraction was followed by ridge preservation surgery using a combination of xenograft and collagen membrane after full-thickness flap reflection. All animals were sacrificed 4 months later, and each extraction site was sectioned in the sagittal plane so that alveolar bone measurements could be made in both the buccolingual and apicocoronal directions using microcomputed tomography.
  
  
  RESULTS
  Mean buccolingual width of the ridges postsurgery was 4.80 ± 2.78 mm, 4.98 ± 2.65 mm, and 4.79 ± 2.79 mm in groups 1, 2, and 3, respectively. The mean vertical distance from the cementoenamel junction to the crest of the ridge was 1.94 ± 0.42 mm, 2.05 ± 0.48 mm, and 2.60 ± 0.67 mm in groups 1, 2, and 3, respectively. No statistically significant difference was seen between single and multiple extraction sites.
  
  
  CONCLUSIONS
  Ridge preservation surgery results in a similar pattern of bone remodeling in the horizontal and vertical dimensions of the edentulous ridge after single and multiple adjacent tooth extractions.
authors.forename: Nawwaf
authors.initials: N
authors.lastname: Al-Hamoudi
authors.forename: Nabil F
authors.initials: NF
authors.lastname: Bissada
authors.forename: Mansour H
authors.initials: MH
authors.lastname: Al-Askar
authors.forename: Khalid A
authors.initials: KA
authors.lastname: Al-Hezaimi
mesh_terms: D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology*; D000543:Alveoloplasty / Q000379:methods*; D000818:Animals; D016723:Bone Remodeling / Q000502:physiology; D016025:Bone Transplantation / Q000379:methods*; D003094:Collagen / Q000627:therapeutic use*; D004195:Disease Models, Animal; D004285:Dogs; D008297:Male; D008567:Membranes, Artificial; D011897:Random Allocation; D013524:Surgical Flaps; D014081:Tooth Extraction; D020390:Tooth Socket / Q000601:surgery; D014183:Transplantation, Heterologous; D014945:Wound Healing / Q000502:physiology; D055114:X-Ray Microtomography
chemical_list: D008567:Membranes, Artificial; D003094:Collagen