title: Influence of periodontal biotype on buccal bone remodeling after tooth extraction using the flapless approach with a xenograft: a histomorphometric and fluorescence study in small dogs.
abstract: BACKGROUND
  Several approaches have been used to counteract alveolar bone resorption after tooth extraction.
  
  
  OBJECTIVE
  The aim of the present study was to evaluate the influence of gingival thickness and bone grafting on buccal bone remodeling in extraction sockets with thin buccal bone, using a flapless approach.
  
  
  METHODS
  The gingiva of 8 dogs was thinned at one side of the mandible and mandibular premolars were extracted without flaps. The sockets were randomly assigned to the test group (thin gingiva) (TG), the test group with grafting material TG + GM, the control group (normal gingiva) (CG), or the control group with grafting material CG + GM. Ground sections were prepared from 12-week healing biopsies, and histomorphometry and fluorescence analysis were performed.
  
  
  RESULTS
  In the groups with thin gingiva, numerically greater buccal bone loss was observed, while there were no differences between grafted and nongrafted sites. A numerically higher rate of mineralization was observed for the grafted sites, as compared with the nongrafted sites, at 12 weeks.
  
  
  CONCLUSIONS
  A thin buccal bone plate leads to higher bone loss in extraction sockets, even with flapless surgery. The gingival thickness or the use of a graft material did not prevent buccal bone resorption in a naturally thin biotype, but modified the mineralization process.
authors.affiliation: Department of Oral and Maxillofacial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
authors.forename: Luciana Prado
authors.initials: LP
authors.lastname: Maia
authors.forename: Danilo Maeda
authors.initials: DM
authors.lastname: Reino
authors.forename: Arthur Belém
authors.initials: AB
authors.lastname: Novaes Junior
authors.forename: Valdir Antonio
authors.initials: VA
authors.lastname: Muglia
authors.forename: Mário
authors.initials: M
authors.lastname: Taba Junior
authors.forename: Márcio Fernando de Morais
authors.initials: MF
authors.lastname: Grisi
authors.forename: Sérgio Luís Scombatti de
authors.initials: SL
authors.lastname: Souza
authors.forename: Daniela Bazan
authors.initials: DB
authors.lastname: Palioto
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging* / Q000473:pathology; D000818:Animals; D001641:Bicuspid; D001706:Biopsy; D016723:Bone Remodeling; D016025:Bone Transplantation / Q000379:methods*; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D004285:Dogs; D005881:Gingiva / Q000033:anatomy & histology / Q000601:surgery; D005889:Gingival Recession / Q000000981:diagnostic imaging*; D064593:Heterografts; D057893:Immediate Dental Implant Loading; D008856:Microscopy, Fluorescence; D011897:Random Allocation; D014081:Tooth Extraction; D014945:Wound Healing
chemical_list: D015921:Dental Implants
keywords: alveolar bone remodeling; animal model; extraction socket; flapless implant surgery; xenograft