title: Preservation of posterior mandibular extraction site with allogeneic demineralized, freeze-dried bone matrix and calcium sulphate graft binder before eventual implant placement: a case series.
abstract: OBJECTIVE
  This case series reports short- and long-term healing, before and after placement of an implant, in posterior mandibular extraction sites grafted with demineralized, freeze-dried bone matrix (DFDBM) allograft mixed with calcium sulphate graft binder.
  
  
  METHODS
  Three patients who underwent surgical extraction of a posterior mandibular molar experienced partial loss of the buccal bone plate at the extraction site. Alveolar bone reconstruction with a DFDBM allograft mixed with calcium sulphate graft binder was performed immediately. The graft was covered with a biodegradable regenerative membrane. For each of the 3 patients, the implant and healing abutment were placed after 6, 9 and 12 months, respectively, followed by crown placement 3, 5 and 5 months later, respectively. The implants were periodically re-evaluated, both clinically and radiographically, between 10 and 39 months after final insertion of the crown. An implant stability device was used to evaluate the long-term biological and functional stability of the implants.
  
  
  RESULTS
  Upon exposure and implant placement, the grafted alveolar ridge in all patients presented appropriately sized, dense and well-vascularized bone, wide enough to receive the planned wide-platform implant. The long-term interface stability quotient ranged from 87 to 90.
  
  
  CONCLUSIONS
  Posterior mandibular extraction sites with compromised buccal alveolar bone may be effectively managed by immediate alveolar augmentation using a mixture of DFDBM allograft and calcium sulphate graft binder. This approach provides ideal alveolar form and consistency for eventual placement of the implant.
authors.affiliation: King Khalid University, Abha City, Saudi Arabia.
authors.forename: Mazen
authors.initials: M
authors.lastname: Almasri
authors.forename: Aldo-Joseph
authors.initials: AJ
authors.lastname: Camarda
authors.forename: Hugo
authors.initials: H
authors.lastname: Ciaburro
authors.forename: Fairouz
authors.initials: F
authors.lastname: Chouikh
authors.forename: Sarah-Jane
authors.initials: SJ
authors.lastname: Dorismond
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000379:methods*; D001857:Bone Matrix / Q000637:transplantation*; D002133:Calcium Sulfate / Q000627:therapeutic use*; D003442:Crowns; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D019250:Dental Implants, Single-Tooth; D006801:Humans; D008334:Mandible / Q000601:surgery; D008567:Membranes, Artificial; D008963:Molar / Q000601:surgery*; D014081:Tooth Extraction; D014945:Wound Healing
chemical_list: D008567:Membranes, Artificial; D002133:Calcium Sulfate