GUIDED REGENERATION OF JAW BONE DEFECTS WITH COMBINATION OF OSTEOPLASTIC MATERIALS AND STEM CELLS.

Reconstruction of mandibular defects is a challenging issue in maxillofacial surgery. Success of the treatment is defined by the process of reparative regeneration of bone tissue, which is often accompanied with wound infection, failure of microcirculation and tissue hypoxia. Aim of our project was to demonstrate the advantage of osteoplastic material and bone marrow derived mesenchymal stem cells combination in regeneration of lower jaw bone defect. For this reason, mandibular bone defect was created in laboratory rats. Experimental treatment of animals was performed in three different ways: group 1. - Bone defect was regenerated without any treatment, group 2. - Bone defect was filled with osteoplastic material (BIO-OSS), group 3. - Bone defect was filled with BIO-OSS, which was previously infiltrated by bone marrow mesenchymal stem cells. Animals were under observation for 6 months. During this period bone regeneration was comparatively analyzed in these tree experimental groups. Observational, histochemical and x-ray research methods were used in this study. Our results suggest that use of osteoplastic material and mesenchymal stem cells combination can increase formation of red bone marrow, which is normally slow under natural condition. Therefore, we can conclude that application of osteoplastic material with bone marrow derived mesenchymal stem cells can decrease time of bone defect osteointegration and define the quality of regenerated bone tissue.