title: Subantral filling by deantigenated heterologous bone and immediate fixture placement.
abstract: OBJECTIVE
  A successful implant therapy depends on sufficient quantity of available bone. Latero-posterior maxillary area often represents a hardly useful zone for routine implant therapy in long time edentulous patients. Standard procedures of maxillary sinus lifting are the goals of implant-prosthetic rehabilitation. Among different grafting materials used in this kind of procedures, the deantigenated heterologous bone reliability has been tested.
  
  
  METHODS
  In a clinical case of maxillary bone atrophy (Misch classification, SA3) a deantigenated heterologous bone grafting and immediate fixture placement has been performed; before prosthetic finalization a biopsy in the grafting site has been carried out in order to obtain an histological evaluation of the graft integration.
  
  
  RESULTS
  The histological analysis and X-ray at 1 year follow-up show the formation of osteoid tissue integrated with the surrounding bone tissue, reaching bone maturity by calcification. In spite of a longer time for grafting integration, the advantages of a single-time surgery and the reduction of surgical timing are stressed.
  
  
  CONCLUSIONS
  X-rays and histological results lead authors to consider the tested heterologous bone as a valid alternative to autologous bone, especially in those patients where it is preferable to avoid a second surgical site in order to take an inlay graft.
authors.affiliation: Department of Dentistry and Stomatology Faculty of Medicine and Surgery I La Sapienza University, Rome, Italy. alberto.debiase@uniroma1.it
authors.forename: A
authors.initials: A
authors.lastname: De Biase
authors.forename: F
authors.initials: F
authors.lastname: Guerra
authors.forename: L
authors.initials: L
authors.lastname: Cipriano
authors.forename: L
authors.initials: L
authors.lastname: Lamazza
authors.forename: E
authors.initials: E
authors.lastname: Tucci
mesh_terms: D000328:Adult; D001284:Atrophy; D016025:Bone Transplantation / Q000379:methods*; D003757:Dental Implantation / Q000379:methods*; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology* / Q000601:surgery*; D013997:Time Factors