Experimental study on histological changes in the sinus membrane following sinus lift
Vol. 52 No. 4, 2011
ROMANIAN JOURNAL of MORPHOLOGY and EMBRYOLOGY
Fl. Onisor-Gligor, Ondine Lucaciu, R. Campian, L. Oana, D. Gheban, A. Florea
The aim of this study is to assess the histological changes in the sinus mucosa adjacent to the alloplastic material used for subantral augmentation. Materials and Methods: The study included ten sheep and a dog. The first group of five sheep underwent a sinus lift procedure, using PerioGlas as an augmentation material; the second similar group of sheep was the control group. The dog underwent a sinus lift procedure, with PerioGlas augmentation, after the sinus membrane was intentionally perforated and two implants were placed in the same operative step. Results: Scanning electron microscopy (SEM) of the sinus mucosa in the control group revealed cells without cilia between goblet cells. The cilia were uniformly arranged in sections in the same direction. Changes occurred in the sinus mucosa after grafting, such as drastic reduction of ciliated cells, which seemed to be replaced by goblet cells. In all sheep undergoing grafting, generalized fibrosis was found in the mucosal area that came into contact with PerioGlas. In two of the sheep in which grafting was performed, mucoid cysts with pseudo stratified ciliated epithelium were present. Even when the sinus mucosa was perforated (in the dog), the inflammatory process developed in the mucosa did not prevent the integration of the graft and implants. In conclusion, following the sinus lift procedure, changes occur in the sinus membrane to adapt to the new situation, without the appearance of chronic or acute suppurative processes.
Corresponding author: Florin Onisor-Gligor, e-mail: dr_onisorf@yahoo.com
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