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Maxillary sinus lift with intraoral autologous bone and B--tricalcium phosphate: histological and histomorphometric
Luis Antonio Aguirre Zorzano1, María José Rodríguez Tojo, José Manuel Aguirre Urizar
1Departamento de Estomatología, Facultad de Medicina y Odontología, Universidad del País Vasco, EHU, Leioa 48940. Bizkaia. Spain. laaz@euskalnet.net
Introduction:
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.
Aim:
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.
Materials And 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.
