Histological evaluation for bone grafting with veterinary hydroxy-apatite

This research was planned to evaluate the healing process and actual bone formation in resected m and ible, that was reconstructed using veterinary porous hydroxyapatite. Twelve rabbits were included in the study, three of them were considered as control group that the surgically created defect was not reconstructed. The surgical defects of the rest of the animals were reconstructed with the material under investigation. The animals were sacrificed after 2, 4 and 6 months, respectively, and studied histologically by light and SEM. The results showed that the healing process was carried out in the form of fibrovascular tissue that undergoes into an immature women bone, followed by young osteons and, finally, the mature lamellar bone was formed

Evaluation of hard self-cured acrylic resin as a denture relining material: clinical, cytological and infra-red spectroscopic studies

Twelve subjects had an ill fitting lower denture, and were selected for clinical and cytological studies. Infrared spectroscopic study was done on 40 test discs of self-cure resin. The results of the present study indicated that, clinically, the mucosal irritation was expressed at the first 5 days of the study, and by the end of the 7th day. It completely subsided. Cytologically, there was an apparent loss of epithelial cells at the first 5 days of the investigation, followed by the formation of keratinized cells as protective layer from irritant agent beginning at the seventh day. Infrared spectroscopic analysis indicated that there was no hydroxyl absorption either aliphatic [due to ethylene glycol] or aromatic [hydroquinone]. So, both materials were reached directly with the acrylate present in the polymer and the monomer to form a long-chain polymer