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Possibilities of influencing the healing and ligamentization of the graft during anatomical reconstruction of the anterior cruciate ligament - Results of the Prospective Randomised Study
Kasl, Jan ; Matějka, Jiří (advisor) ; Paša, Libor (referee) ; Pilný, Jaroslav (referee)
Aims Prospective, randomized, non-blinded study, on the effects of use of platelet-rich fibrin (PRF) in anterior cruciate ligament reconstruction surgery. Methods Initially, 40 patients between 2012 and 2014 were enrolled in the study and randomized for the treatment with (n=20, intervention group) or without (n=20) the use of PRF (controls). The average age was 29.1 years at inclusion, with 12 female and 28 male patients. Vivostat ® PRF was obtained from patient blood and applied onto the hamstring graft. Magnetic resonance imaging (MRI) documented healing was evaluated at 6 and 12 months. Clinical outcome parameters as well as standardized evaluation of knee laxity using the GenouRob device were collected at 12 months. Results Thirty-three patients completed the full follow-up (17 intervention, 16 control). In two cases, a graft tear was documented (occurred in the control group). However, there were no differences in the remodeling progress in MRI using the log-rank test (p=0.07). There was no difference in the return to pre-injury sport levels (p=0.232), Lysholm and IKDC scores (p=0.259 and p=0.364 respectively). Knee laxity measurements showed no differences between the intervention and control groups. Discussion Similar results we found in our study have recently been published by other world...
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Biomechanical Study of Force Transmission in the Area of Periprosthetic Fracture of the Distal Femur in Individual Types of Osteosynthesis with Application in Practice
Malotín, Tomáš ; Matějka, Jiří (advisor) ; Džupa, Valér (referee) ; Rozkydal, Zbyněk (referee)
Periprosthetic distal femoral fractures (PDFF) constitute an unpleasant complication in patients with a total knee replacement (TKR). The incidence reported in literature is 0,3-2,5 %. The number of periprosthetic knee fractures has been increasing due to the ageing of population, a growing number of implants, a longer life expectancy of patients, a more intensive physical activity of patients, and osteoporosis. Most of these fractures are treated surgically, non-surgical treatment is reserved solely for patients unable to undergo a surgery for general health conditions. Our retrospective study evaluated the group of patients with PDFF who were treated at our department in the period 2007-2020 and 4035 primary TKR were performed. The total number of patients with PDFF was 88. The mean age of patients with PDFF was 77 years (56- 94 years) and at the time of fracture the mean age was 71 years in men and 78 years in women. The average time from the TKR to periprosthetic fracture was 8.2 years (0-20 years). The fractures were assessed using the Su classification modified by Krbec. A primary TKR was performed in 75 cases for gonarthrosis, in 7 cases for rheumatoid arthritis and in 6 cases for secondary,post-traumatic gonarthrosis. The average incidence of periprosthetic distal femoral fractures was 6...
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Radiological, Histochemical and Histological Changes M. Erector Spinae by Patients with a Fracture of Thoracolumbal Spine Treated With Open or Miniivasive Stabilisation
Matějka, Tomáš ; Matějka, Jiří (advisor) ; Džupa, Valér (referee) ; Chaloupka, Richard (referee)
Today, miniinvasive operations are part of modern medicine and in recent years have partially replaced open methods. The aim of this study was to compare radiological, histochemical and histological changes of the erector spinae muscle in patients with thoracolumbar spine fractures treated with open (OPEN) and miniinvasive (MISS) stabilization. The purpose was not to evaluate one method as better or worse, it was only a comparison and finding out the advantages and disadvantages of individual operations. During the study, we compared both the above-mentioned differences in the quality of the erector spinae muscle and laboratory changes in blood levels of muscle enzymes, we compared the duration of operations, the accuracy of insertion of transpediculars screws, blood loss, kyphotization of spine segments and exposure of radiation. It has been hypothesized that muscle damage in all factors will be lower in MISS than in OPEN. A total of 38 patients with type A and B fractures according to the Vaccar classification, 19 underwent MISS surgery and 19 at the OPEN method were included in the prospective randomized study. The average age of the whole group was 46.4 years (18 - 68), the average age for MISS procedures was 42.6 (18 - 66), for OPEN was 48.7 (19 - 68). Only monotrauma of the TL spine was...
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GPG Encrypted Web Pages
Matějka, Jiří ; Pluskal, Jan (referee) ; Polčák, Libor (advisor)
Cílem této práce je navrhnout a implementovat způsob zabezpečení citlivých dat na veřejných serverech nebo serverech třetích stran. Práce se zabývá implementací rozšíření pro webový prohlížeč Mozilla Firefox, které bude schopno nalézt a dešifrovat zašifrované prvky webové stránky s využitím výstupů GnuPG projektu. Rozšíření musí být dále schopno zpracovat dynamické změny webové stránky způsobené použitím XHR API, Fetch API, či Push API. V neposlední řadě se práce zabývá testováním implementovaného řešení a měření vlivu rozšíření na celkovou dobu zpracování webových stránek prohlížečem.
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BRDF workshop
Matějka, Jiří ; Pelikán, Josef (advisor) ; Karlík, Ondřej (referee)
This thesis develops an application for interactive experiments with BRDF functions. Arbitrary BRDF function may be specified with an analytic formula, including arbitrary number of parameters. A simple scene is displayed, using specified BRDF. The parameters can be modified which has an immediate impact to the scene's appearance. The application can utilize a programmable GPU for high speed of rendering.
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Lighting workshop
Matějka, Jiří ; Horáček, Jan (referee) ; Pelikán, Josef (advisor)
The object of this work is to design and implement an application for interactive experiments with local illumination models. The user can arbitrarily define an illumination model with mathematical formulas and mark certain parameters to be changeable. While such parameters are changed, the program smoothly draws an updated 3D scene. The scene can be defined in the text format, while several scenes are bundled with the program. Two predefined well-known illumination models are also bundled with the program - Strauss' and Phong's model.
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Technologie pěstování a možnosti využití druhu Scorzonera hispanica L.
Matějka, Jiří
The Diploma work based upon a topic Technology of growing and possibilities of usage of species Scorzonera hispanica L. presents and evaluates in its literary part still known information about possibilities of growing, content substances and possibilities of usage of Scorzonera hispanica L.. The practical part of the work describes an experiment, which was created in 2014 in property in region of Bohemia Moravian Highlands. The experiment consisted of making two different agrotechnical methods of growing and two harvests and following comparison from perspective of crop and nutritional value. On the foundations of the statistical evaluation, an influence of chosen agrotechnical method of growing on crop, content of solids, sodium and magnesium was proved. The date of the harvest influenced content of sodium, calcium and magnesium. Possibilities of use of Scorzonera hispanica L. were checked by degustation and marketing research, when interest in these species of root vegetable was proved.
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Proposal of company´s E-marketing
Hadrava, Martin ; Matějka, Jiří (referee) ; Dvořák, Jiří (advisor)
Thesis contains the basic theoretical resources for processing e-marketing of company; it offers two options of problems solving proposals. The first option contains basic web presentation with SEO optimalization. The second option, which is superstructure of the first one, is enriched by advertising activities on internet, which direct the user to the visiting of websites. These suggestions are consequently evaluated from the economical point of view.
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