title: Ridge alterations following flapless immediate implant placement with or without immediate loading. Part II: a histometric study in the Beagle dog.
abstract: OBJECTIVE
  To assess the effect of immediate loading on ridge alterations following implants placed into fresh extraction sockets in a dog model.
  
  
  METHODS
  Six Beagle dogs were used. Four implants were placed into post-extraction sockets in the lower jaw immediately after the removal of premolars 3 and 4. In the control side, two implants remained without occlusal loading, and in the test side, they received an immediate prosthesis with occlusal contacts (involving implant sites). Extraction sockets without implants were used as a test in non-involved implant sites. Three months later, the dogs were sacrificed.
  
  
  RESULTS
  Vertical distance from implant shoulder to bone crest (BC) was similar for both groups. BC at the buccal aspect was located 3.66 mm apical to the shoulder in the test group and 4.11 mm in the control group. This difference was not statistically significant. Buccal bone resorption was more pronounced in the premolar 3 area than in the premolar 4 area. In edentulous sites, the buccal bone crest was located 0.97 mm apical to the lingual counterpart.
  
  
  CONCLUSIONS
  Immediate implant placement with or without immediate loading does not prevent the amount of bone resorption that occurs following tooth extraction without immediate implant placement.
authors.affiliation: Department of Stomatology, School of Medicine and Odontology, University of Santiago de Compostela, Santiago de Compostela, Spain. jblanco@blancoramos.net
authors.forename: Juan
authors.initials: J
authors.lastname: Blanco
authors.forename: Antonio
authors.initials: A
authors.lastname: Liñares
authors.forename: Javier
authors.initials: J
authors.lastname: Pérez
authors.forename: Fernando
authors.initials: F
authors.lastname: Muñoz
mesh_terms: D016301:Alveolar Bone Loss / Q000473:pathology; D000539:Alveolar Process / Q000473:pathology*; D000818:Animals; D001641:Bicuspid / Q000601:surgery; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D003830:Denture, Partial, Fixed; D004285:Dogs; D005881:Gingiva / Q000473:pathology; D057893:Immediate Dental Implant Loading; D007576:Jaw, Edentulous, Partially / Q000473:pathology; D008334:Mandible / Q000473:pathology / Q000601:surgery; D023421:Models, Animal; D016348:Osseointegration / Q000502:physiology; D014081:Tooth Extraction; D020390:Tooth Socket / Q000601:surgery*
chemical_list: D015921:Dental Implants