M Andreasi Bassi1, M A Lopez1, L Confalone1, D Lauritano2, V Candotto3. 1. Private Practitioner in Rome, Rome, Italy. 2. Department of Medicine and Surgery, University of Milano "Bicocca", Monza, Italy. 3. Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.
Abstract
PURPOSE: The crestal sinus lifting by means of hydraulic technique associated with a nano-cristalline hydroxyapatite in an aqueous medium is investigated. MATERIALS AND METHODS: A specific purpose-made instrument is used, consisting of a syringe with a micrometrically controlled piston connected to a dispenser used to inject, in a calibrated and precise manner, noted volumes of graft material into the sub-schneiderian space. Adopting such a technique the Authors performed 7 future site developments, on 7 patients (2 males; 5 females; mean age 49.29±8.08 years), using a nanocrystalline hydroxyapatite. In the second stage, performed at 5.71±1.52 months, 7 implants were placed, after harvesting bone biopsies from the regenerated sites. The samples underwent histological and histomorphometric analysis. RESULTS: The average percentage of vital bone was of 33.27±5.98%, while the bone marrow and graft material were 60.84±5.93% and 5.87±3.05%, respectively. CONCLUSIONS: The results confirm the effectiveness of this method in restoring bone volume in the sub-antral region. Furthermore nano-cristalline hydroxyapatite is a proper material for sinus floor augmentation.
PURPOSE: The crestal sinus lifting by means of hydraulic technique associated with a nano-cristalline hydroxyapatite in an aqueous medium is investigated. MATERIALS AND METHODS: A specific purpose-made instrument is used, consisting of a syringe with a micrometrically controlled piston connected to a dispenser used to inject, in a calibrated and precise manner, noted volumes of graft material into the sub-schneiderian space. Adopting such a technique the Authors performed 7 future site developments, on 7 patients (2 males; 5 females; mean age 49.29±8.08 years), using a nanocrystalline hydroxyapatite. In the second stage, performed at 5.71±1.52 months, 7 implants were placed, after harvesting bone biopsies from the regenerated sites. The samples underwent histological and histomorphometric analysis. RESULTS: The average percentage of vital bone was of 33.27±5.98%, while the bone marrow and graft material were 60.84±5.93% and 5.87±3.05%, respectively. CONCLUSIONS: The results confirm the effectiveness of this method in restoring bone volume in the sub-antral region. Furthermore nano-cristalline hydroxyapatite is a proper material for sinus floor augmentation.
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