Krzysztof Suszyński

Introduction Research on the possibility of increasing the effects of after-injury reconstruction of peripheral nerves conducted in the Department of Physiology at ŚUM resulted in the development of a new method of reconstruction after peripheral nerve injuries. In this new method, we used 7-day predegenerated in situ sural nerve grafts. In clinical assessment, we concluded that recovery in motor, sensory and vegetative function after peripheral nerve injury treatment is better with the use of predegenerated grafts. The latent efficacy of reconstruction was measured months or years after reconstruction. In that amount of time, denervated synaptic sites in muscles can be reinnervated by nearby healthy non-injured nerves. It could increase motor, sensory, or vegetative function, irrespective of the effects of chirurgical treatment. We decided to investigate whether the circumstances may influence the latent efficiency of the new method of reconstruction. Materials and Methods Experiments were carried out on 32 patients in The Department of Neurosurgery Medical University of Silesia. Twenty patients were operated on with a predegenerated (P) implant, and 12 patients operated in the traditional method (T). As a result, 25% of patients’ reinnervation from healthy nearby nerves in the area supplied by reconstructed nerves was present. In group P, reinnervation appeared in 7 of 20 patients (35%) and in group T, in 1 from 12 (8.33%) cases. Results Results of the examinations were counted statistically in both groups. Conclusion Reinnervation from nearby healthy non-injured nerves positively influences the results of human peripheral nerve reconstruction.

Introduction Periodontitis is a disease of the tissues surrounding the tooth, leading to tooth loss. Missing teeth are often restored with fixed prostheses supported by implants. The aim of this study was to analyze subgingival microbiota in periodontal pockets and around implants, as well as to assess the correlation of periodontal parameters and risk factors for periodontitis with the presence of selected bacteria. Materials and Methods The study included 33 patients of both sexes, aged 39 to 79 years, having their own dentition and intraosseous implants with healthy periodontium or reversible gingivitis. The patients underwent periodontal examination and bacteriological analysis with the use of a PET RT-PCR kit (MIP Pharma, Germany). Results Less plaque was observed on implant surfaces than around natural teeth (28.7% vs. 39.8%). On the other hand, significantly deeper pockets (2.9 vs. 2.3 mm), and a slightly higher gingival bleeding index (27.9 vs. 22.6%) were noted around implants. Conclusions There were no significant differences in the overall presence and number of studied pathogens between the natural teeth and implants. In the case of natural teeth, the presence of Porphyromonas gingivalis , Treponema denticola , Tannerella forsythia and Prevotella intermedia showed correlation with clinical status: the amount of plaque (Td, Tf), bleeding (Td, Tf, Pi) and probing depth (Pg, Td, Tf, Pi). Such relationships were not observed in the case of implants. Bacteria from periodontal pockets also demonstrated more correlation with the general condition compared to bacteria residing in tissues around implants.