[The evaluation of mineral crystallinity of mandibular bone tissue using electron paramagnetic resonance (EPR) in patients suffering from renal osteodystrophy]. / Ocena krystalicznosci mineralu tkanki kostnej zuchwy w przebiegu osteodystrofii nerkowej przy uzyciu spektrometrii elektronowego rezonansu paramagnetycznego (EPR).

Mineral crystallinity of bone tissue is subject to changes during one's development, as well as in many systemic diseases, especially renal osteodystrophy. The aim of the study was qualitative evaluation of the mandibular bone tissue in patients suffering from renal osteodytrophy, treated with renal-replacement therapy: hemo-dialysis or allogeneic kidney transplantation. The mineral crystallinity coefficient was evaluated using electron paramagnetic resonance (EPR) based on the observation that ionizing radiation induces paramagnetic centers in hydroxyapatites. The concentration of these centers was used to establish an indicator of crystallinity rate which is a measure of the crystallinity of tissue mineral. On the basis of these results, it is possible to widen the indications for implantological treatment in specific clinical cases.

[The occurrence of microorganisms in intraoral abscesses]. / Wystepowanie drobnoustrojów w ropniach wewnatrzustnych.

The aim of this study was to assess the occurrence of microorganisms in 39 intraoral abscesses. The samples were place in transport medium. The materials were inoculated on adequate enrichment and selective media and cultivated under anaerobic and aerobic conditions. The microorganisms were found in all samples (100%), Anaerobic bacteria most frequently were recovered. The predominant anaerobes were from genus Prevotella, Bacteroides, Fusobacterium and Peptostreptococcus. Among aerobic bacteria, the most frequent were gram-positive cocci. The microaerophilic bacteria and fungi most rarely were isolated from pus samples.