In vitro model for frontal sinus obliteration with bioactive glass S53P4

• Published in: Journal of biomedical materials research Vol. 53; no. 2; p. 161
• Main Authors: Peltola, M J, Suonpää, J T, Andersson, H, Määttänen, H S, Aitasalo, K M, Yli-Urpo, A, Laippala, P J
• Format: Journal Article
• Language: English
• Published: United States 2000
• Subjects: Body Fluids; Bone Substitutes; Electron Probe Microanalysis; Frontal Sinus - diagnostic imaging; Frontal Sinus - surgery; Frontal Sinusitis - diagnostic imaging; Frontal Sinusitis - surgery; Glass; Humans; Indicators and Reagents; Microscopy, Electron, Scanning; Tomography, X-Ray Computed
• ISSN: 0021-9304; 1097-4636
• DOI: 10.1002/(SICI)1097-4636(2000)53:2<161::AID-JBM5>3.0.CO;2-3

An in vitro model was used to investigate the behavior of a massive frontal sinus obliteration with bioactive glass S53P4 (BG) for clinical purposes. Two sizes of granules (0.63-0.8 mm or 0.8-1.0 mm) in 16 separate BG amounts, weight 25 g, were tested both in simulated body fluid (SBF) and a buffer containing trishydroxymethyl aminomethane citric acid (TRIS-c.a) in standard conditions. The dissolution of silicon (Si) and phosphate (P) was detected with direct current plasma atom emission spectroscopy (DCP-AES) monthly up to 6 months. The BG masses were scanned by computer tomography (CT) and the scans analyzed by Region of Interest (ROI) technique. Calcium phosphate (CaP)- and silica (Si)-gel-layers were studied by scanning electron microscopy (SEM) at 1, 3, and 6 months. Cumulative loss of Si and P was stronger in TRIS -c.a than in SBF (p < 0.0001), and it was higher with smaller than with larger granules in both solutions (p < 0.0001). This was shown correspondingly by the decrease in Hounsfield units (HU) by ROI analysis (p < 0.0001). In SBF-soaked BG masses, the CaP-layer occurred on the uppermost granules, and in TRIS-c.a at 3-6 months, on the granules in the center and lower parts. The decrease of HU seems to reveal indirectly the resorption of BG.