title: Maxillary sinus lift with intraoral autologous bone and B--tricalcium phosphate: histological and histomorphometric clinical study.
abstract: BACKGROUND
  Rehabilitation with implants in the upper maxilla often implies a challenge due to the shortage and quality of the remaining bone. Different kinds of grafts have been described in an endeavour to solve these problems.
  
  
  OBJECTIVE
  The purpose of this study was to assess the osteoconduction potential of an autogenous bone and B-Tricalcium Phosphate mixture, in the treatment of atrophic upper maxillae.
  
  
  METHODS
  22 patients were treated using the "sinus lift" technique. All patients had residual bone equal to or greater than 5 mm, the sinus was lifted, bone grafted and implants installed during the same surgical procedure (autologous bone and B- Tricalcium Phospahate). During the implant exposure after the osseointegration period, samples of regenerated bone were taken using a trephine from 5 patients. Paraffin-embedded sections were analysed the structure and tissues percentages. Data were estimated statistically.
  
  
  RESULTS
  Clinical results showed integration of the 42 fixtures installed. Histological analysis showed good integration of the B-Tricalcium Phosphate in the newly formed bone likewise absence of inflammation. Histomorphometric analysis showed a mean bone proportion of 30.7% (range 22.8%-50.6%).
  
  
  CONCLUSIONS
  Results suggest the osteoconductive material B-Tricalcium Phosphate associated with autologous bone obtained through filtration is an appropriate graft for implant treatment of atrophic maxillae, in combination with the sinus lift procedure.
authors.affiliation: Departamento de Estomatología, Facultad de Medicina y Odontología, Universidad del País Vasco, EHU, Leioa 48940. Bizkaia. Spain. laaz@euskalnet.net
authors.forename: Luis Antonio
authors.initials: LA
authors.lastname: Aguirre Zorzano
authors.forename: María José
authors.initials: MJ
authors.lastname: Rodríguez Tojo
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Aguirre Urizar
mesh_terms: D000328:Adult; D000368:Aged; D001284:Atrophy / Q000601:surgery; D016025:Bone Transplantation; D002130:Calcium Phosphates; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000033:anatomy & histology / Q000473:pathology* / Q000601:surgery*; D008875:Middle Aged; D019647:Oral Surgical Procedures / Q000379:methods
chemical_list: D002130:Calcium Phosphates; D015921:Dental Implants; C018392:tricalcium phosphate