Grzegorz Kwiatkowski

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PURPOSE OF THE STUDY The aim of this study was to provide data on the prevalence and epidemiology of isolated deep chondral lesions of the knee, diagnosed in arthroscopy. The study was also aimed to analyse subjective treatment results of localized deep isolated cartilage lesions and to determine how the different factors might affect the final outcome.(More)
We aimed to evaluate whether and to what extent an isolated deep cartilage lesion localized within the tibiofemoral and the patellofemoral joint has an impact on the clinical outcomes and osteoarthritis (OA) progression when it is left untreated. From 1991 to 1994, 4121 consecutive knee arthroscopies were performed, and 37 of them in patients with a single(More)
A high-modulus polymer, polysulfone, was evaluated as a porous bone implant material. The bone ingrowth into canine cortical pellets of sintered polysulfone particles was assessed by microradiography and histology. The shear strength of the porous polysulfone-bone interface was determined by push-out and pull-out tests of cortical and trochanteric implants,(More)
A theory of dynamic nuclear polarisation (DNP) by thermal mixing is suggested based on purely quantum considerations. A minimal 6-level microscopic model is developed to test the theory and link it to the well-known thermodynamic model. Optimal conditions for the nuclear polarization enhancement and effects of inhomogeneous broadening of the electron(More)
We discuss conceptual and instrumental progress in dissolution DNP since its introduction in 2003. In our view there are three critical steps in the dissolution DNP process: (i) The achievable polarization level in a sample. (ii) The time required to build up the polarization. (iii) The transfer of the sample to the measurement system with minimum loss of(More)
Background. The knee joint cartilage is vulnerable to traumatic injury, which may lead to osteoarthritis and may result in restrictions of normal knee function and negatively influence the physical activity. The purpose of this study was the epidemiologic and statistical analysis of traumatic cartilage lesions. Material and methods. From 1998 to 2003, 5233(More)
In language engineering, computer understanding of processed text gains importance. It also gives a chance to improve the quality of translations into Polish Sign Language carried out in Thetos, our translator. To achieve this, we improve the scheme of semantics modeling used in Polsem, the semantic analyzer of Thetos. In this paper we describe experiments(More)