română SORINA STROE, VLAD NAICU, ION PĂTRAŞCU
Abstract
The main objective of our research was to evaluate the PRF potential in bone regeneration of the periodontal bone defect. Using platelet gel for improving bone regeneration is a recent technique in oral surgery and implantology. In this study, based on casuistry, we have evaluated PRF’s local effect combined with the autogenous graft and freeze-dried bone allograft in order to improve bone regeneration in periodontal bone deficiency.
The personal study was accomplished on 5 subjects with various sized periodontal bone deficiencies. From the treated lot, we have selected the most significant clinical case, having an important bone defect in the maxillary frontal area. In the treatment lot we have resolved 3 clinical cases where we have applied peri implantary a mixture of synthetic bone and PRF, plus PRF superjacent membranes. We accomplished a sealing and colonization of the bone defect with the most biocompatible material, assuring quick local bone regeneration and healing. The mixture of PRF – autogenous bone and membrane (PRF), were also used to augment the sinus floor needed for the procedure of elevating the maxillary sinus.
Keywords
platelet concentrate, periodontal defects, maxillary sinus elevation
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Year
2014
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Issue
44 (2)
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Pages
189-194
SORINA STROE, VLAD VASILESCU, CLAUDIU CĂLIN, ION PĂTRAŞCU
Abstract
The working hypothesis on the interaction between the addition biomaterial – peri implant bone is based on the idea that current addition biomaterials based on ceramic and / or collagen form de novo bone interface, are biocompatible and biointegrable. It was evaluated which of the products has the highest clinical success rate and is approaching the gold standard - autogenous bone. Quantitative and qualitative characteristics, determined from histological regeneration of bone, secondary to the application of an autogenous transplantation, namely the addition of different types of biomaterials are reflected by biological reactivity of each implant and systemic reactivity. Results of the osteoscintigrafical investigations necessary for the exposure of the osteogenesis process dynamics are useful when correlated with histological results also with the integration of the implant and new bone formation. The process of "osteostimulation" occurs when an implanted substance influences the osteoreparation, inducing the formation of bone tissue in the periodontal bone defect. So, an experimental study was conducted to test the capacity of some addition biomaterials to induce new bone growth, using the electronic sweeping microscope and EDS spectroscopy as methods to analyze the process of osteointegration.
Keywords
EDX, biomineralization, osteointegration, bone de novo
IRINA FIERĂSCU, RADU CLAUDIU FIERĂSCU, RODICA MARIANA ION, CONSTANTIN RADOVICI
Abstract
Most of the artefacts of cultural and / or historical value are exposed to fungal attack often causing irreversible damage. The need for new methods of antifungal protection led to the development of a recipe based on hydroxyapatite and barium hydroxide, with promising results. We synthesized and analytical characterized (trough energy dispersive X-ray fluorescence, X-ray diffraction and Fourier transform infrared spectroscopy) several materials based on hydroxyapatite. The efficiency of the synthesized materials was evaluated by diluted inoculums on the culture media technique and a modified Kirby-Bauer method, using simulated artefacts, previously reported to replicate the real artefacts.
Keywords
artefacts, biodeterioration, hydroxyapatite, X-ray methods
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Year
2014
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Issue
44 (3)
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Pages
292-297
DOINA PRODAN, MARIOARA MOLDOVAN, GABRIEL FURTOS, RADU CHISNOIU, VIOLETA POPESCU, OVIDIU PĂSTRAV
Abstract
The root canal sealers have the most important role, being responsable for the final sealing of the tooth root. The novelty elements of this study are represented by the endodontic sealing materials developed-the basic monomer, the coloured bioactive glass, hydroxyapatite in combination with the various metal oxide (all obtained in the laboratory), combining the organic monomers or the inorganic powders, as well as the selection of the appropriate ratio between the organic and inorganic phase and of the optimal polymerization system. All the physicochemical properties of the experimental sealers tested are in accordance with ISO 6876:2001 and the literature data.
Keywords
biomaterials, optical microscopy, endodontic sealers, composites, push out test