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1

Proposal of novel abrasive machining method for preparing the surface of periarticular tissue during orthopaedic surgery of hip joints surface

Zawadzki Paweł, Patalas Adam, Rogala Piotr

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

99

2

Preparation and characteristics of polyurethane-based composites reinforced with bioactive ceramics

Złocista-Szewczyk Natalia, Szatkowski Piotr, Pielichowska Kinga

Engineering of Biomaterials

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2020

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Vol. 23, no. 154

22--29

EN

The purpose of the study was to synthesize and characterize a series of porous polyurethane-based composites modified with β-tricalcium phosphate (TCP) and hydroxyapatite (HAp). The composites were obtained by the one-step bulk polyaddition method using poly(ethylene glycol) (PEG) as a soft segment, 4,4’-diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO) as a chain extender and selected bioactive bioceramics. The obtained composites were characterized using FTIR, DSC, TG and SEM/EDX methods. Moreover, in vitro chemical stability and wettability tests were performed. The preliminary assessment of mechanical properties, porosity and in vitro chemical stability was performed. The test results showed that the best pore distributions, as well as Young’s modulus, were found for the hydroxyapatite--modified composites and PU/20% TCP. The wettability investigations revealed that the contact angle of PU composites was in the range 50-80°, which indicates the hydrophobic nature of the materials. The in vitro biostability studies confirmed that all tested compo-sites were chemically stable during incubation in the simulated body fluid. By using infrared spectroscopy the presence of urethane bonds and completion of reaction were evidenced. The results showed that the bioactivity of the materials was improved, which makes good perspectives for the obtained materials to be considered as potential scaffolds in bone tissue regeneration.

3

Design and manufacture of customized medical implants - continued

Elgalal Marcin, Komorowski Piotr, Makowski Krzysztof, Styczyński Andrzej, Ulański Piotr, Kubiak Tomasz, Sawicki Jacek, Domżalski Marcin, Walkowiak Bogdan

Engineering of Biomaterials

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2019

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Vol. 22, no. 153 spec. iss.

100

4

Analysis of selected roughness parameters describing the degree of surface wear of Weller endoprostheses heads

Cwanek J., Czajkowski A. A.

Problemy Nauk Stosowanych

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2017

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T. 7

157--168

EN

Introduction and aims: The results of analysis for surface geometry of Weller endoprosthesis heads removed from the aseptic loosening of artificial hip joint are presented in the paper. A dependence between the values of amplitude parameters and time period of endoprosthesis exploitation are shown in this paper. Moreover the dependence between the various amplitude parameters of analysed heads surface is described in the paper. Material and methods: It was tested the surface of 37 heads of Weller endoprosthesis, which were exploited from 5 to 20 years. Measurements of geometrical structure were realized by using the Rank Taylor Hobson Talyscan 150 apparatus. The scanning region of Weller endoprosthesis heads had the range of 1,5-2,0 mm2 scanning velocity about 5,0 mm/s. Obtained data were saved and analysed by the Talymap 3.0 computing program. Results: The effect of exploitation of Weller endoprosthesis heads refers to decreasing the values of analysed parameters St, Sz, Sa and Sds. That fact means not only the worse work conditions in the wear point “polyethylene cup - head” of Weller endoprosthesis but also early occurring of aseptic loosening in implanted artificial joint. Conclusions: The dependence between the parameters Sds and St, and also between the parameters Sds and Sz showed rather little correlation with decreasing trend [p<0,05]. The relations between the parameters values Sz and St describing the heads surface of Weller endoprosthesis and time period of their exploitation showed some significant decreasing dependence [p<0,001]. From comparison of parameters St, Sz and Sds implies that each pair of analysed parameters has negative directly proportional relation.

PL

Wstęp i cele: W pracy przedstawiono wyniki analizy geometrii powierzchni głów endoprotez Wellera usuniętych z powodu aseptycznego obluzowania sztucznego stawu biodrowego. W pracy przedstawiono zależność między wartościami parametrów amplitudy i czasem eksploatacji endoprotezy. Ponadto opisano zależności między różnymi parametrami amplitudy powierzchni analizowanych głów. Materiał i metody: Testowano powierzchnię 37 głów endoprotez Wellera, które były eksploatowane od 5 do 20 lat. Pomiary struktury geometrycznej zrealizowano za pomocą aparatu Rank Taylor Hobson Talyscan 150. Obszar skanowania głów endoprotez Weller miał zakres 1,5-2,0 mm2 z prędkością skanowania około 5,0 mm/s. Uzyskane dane zostały zapisane i przeanalizowane przez program obliczeniowy Talymap 3.0. Wyniki: Wpływ eksploatacji głów endoprotez Wellera odnosi się do obniżenia wartości analizowanych parametrów St, Sz, Sa i Sds. Fakt ten oznacza nie tylko gorsze warunki pracy w punkcie zużycia „polietylenowa panewka - głowa” endoprotezy Wellera, ale także wczesne pojawienie się aseptycznego obluzowania w wszczepionym sztucznym stawie. Wnioski: Zależność między parametrami Sds i St, a także między parametrami Sds i Sz wykazywała raczej niewielką korelację z tendencją malejącą [p<0,05]. Zależność między wartościami parametrów Sz i St opisującymi powierzchnię główek endoprotezy Wellera a okresem ich eksploatacji wykazała istotną zależność malejącą [p<0,001]. Z porównania parametrów St, Sz i Sds wynika, że każda para analizowanych parametrów ma ujemną wprost proporcjonalną zależność.

5

On engineering verifications of external and internal fixators for traumatology and orthopaedics

Frydrysek K., Ucen O., Fojtik F., Poruba Z., Theisz G., Sejda F., Michenkova S.

Modelowanie Inżynierskie

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2014

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T. 21, nr 52

42--50

EN

In this article the authors draw attention to the possibilities of treatment for complicated bone fractures. They present their own design, laboratory tests and numerical solutions (i.e. strength analyses and reliability assessments) of the various types of internal and external fixators applied in traumatology and orthopaedics (i.e. intended for fractures of limbs, pelvis and calcaneus). The new design of external fixators is based on the development of Ilizarov and other techniques (i.e. shape and weight optimization based on composite materials, application of smart materials, nanotechnology, low x-ray absorption, antibacterial protection, patient comfort, reduction in the duration of surgical treatment, and cost). Similarly, the new intramedullary nail C-NAIL (i.e. an example of an internal fixator) is intended for minimal-invasive fixation of intra articular calcaneal fractures.

6

Effects of various drilling parameters on bone during implantology : An in vitro experimental study

Karaca F., Aksakal B.

Acta of Bioengineering and Biomechanics

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2013

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Vol. 15, no. 4

25--32

EN

Due to temperature increase during bone drilling, bone necrosis is likely to occur. To minimize bone tissue damage during drilling, a detailed in vitro experimental study by using fresh calf cortical bones has been performed with various combined drilling parameters, such as: drilling environment, drill diameter, drill speed, drill force, feed-rate and drill coating. Bone temperatures at the drilling sites were recorded with high accuracy using multi-thermocouples mounted around the tibial diaphyseal cortex. It was shown that temperatures increased with increased drill speeds. It also decreased with a higher feed-rate and drill force. It was also observed that TiBN coated drills caused higher temperatures in the bone than the uncoated drills and the temperatures increased with larger drill diameters. Although the influence of Simulated Body Fluid (SBF) on rising temperatures during drilling was higher for the TiBN coated drills, it was observed that these drills caused more damage to the bone structure. In order to minimize or avoid bone defects and necrosis, orthopaedic surgeons should consider the optimum drilling parameters.

7

Degradation of composites based on raw materials for orthopedic equipment

Szaraniec B., Morawska-Chochół A., Stodolak-Zych E.

Engineering of Biomaterials

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2012

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Vol. 15, no. 116-117 spec. iss.

147

EN

Eco-composites based on natural raw materials such as polylactide and plant fibres (e.g. flax, hemp, jute) show many important features which enable them to be used as potential materials for biomedical engineering. Availability of the raw materials and low costs of production, capability to enhance mechanical parameters and also controlled time of degradation in the environment allow considering them as materials for rehabilitation equipment, orthopedic supplies or materials for medical packages. Such materials due to the presence of the natural fibres provide higher comfort during their utilization and then they undergo safe biodegradation which is non-harmful for the environment [1,2]. The work presents attempts on fabrication of composites based on polylactide (PLA, Ingeo 3051D, Nature works, USA) reinforced with short flax and jute fibres. The fibres were mechanically comminuted to the length of 1-2 mm. Preparation of PLA/fibres mixture took part in two stages. The first one consisted in drying of the polymer granulate and the fibrous filler at 60 degrees of Celsius for 2 h. The second stage the granulate/fibres mixture was homogenized using vertical screw injection moulding machine (Multiplas). The obtained mixture was mechanically comminuted with a laboratory grinder (Testchem). Volume fraction of the fibres was nit higher then 5 %. The granulates were used to prepare PLA/natural fibres composites in the form of paddle-shaped samples (according to PN-EN ISO 527) by the injection method. The injection took place at 165 degrees of Celsius and pressure of 80 kg/cm2. The samples were subjected to hydrolytic degradation tests (incubation in distilled water at 37 degrees of Celsius, 15 weeks) and biological degradation (composting in an eco-composter, TERMO-410 with the addition of Radvit activator which contains composting bacteria and selected fungi cultures which support biodegradation and accelerate degradation of organic wastes, 15 weeks). The effect of the degradation environment on the composite material was determined on the basis of changes of its mechanical properties (tensile strength, Young's modulus) using an universal testing machine (Zwick 1453). The degradation process was monitored by FT-IR spectroscopy of the composite samples (transmission method, BioRAD 60FT). Changes related to the polymer chain degradation were assessed on the basis of viscosimetric measurements (Hoppler method). The carried out investigations proved, that during both the composting and the incubation in water a gradual degradation of the material takes place. Its visual effect was decrease of the tensile strength of the composites for about 70% for PLA/5% jute and for c.a. 10% for PLA/5% hemp and their Young's modulus for about 25 % for PLA/5% jute and for c.a. 10% for PLA/5% hemp. The changes were caused by decrease of molecular weight (Mn) of the polymer matrix from 100 to 28 kDa for PLA/5% hemp, and from 136 to 48 kDa for PLA/5% jute. The change of the polymer structure was faster in the case of degradation in water environment. This effect was related to facilitated migration of medium (water) inside the material and possibility of washing out and transport of products of the polymer chain disintegration. Additionally, the present fibrous phase which is characterized by high water absorbability may became a reservoir of both the medium and the degradation products. Biodegradation in the compost heap was slower and it was an example of synergic effect of hydrolytic degradation and biodegradation caused by the microorganisms. This process could be observed on the FT-IR spectra recorded during degradation in the compost heap, where longer composting time led to increasing disproportion between bands indicating increasing fraction of hydroxyl, carboxyl and carbonyl groups in relation to groups characteristic for PLA chain. In the case of biodegradation the process progress is related to such variable factors as: amount and type of the bacteria and fungi cultures, humidity and temperature. In conclusion, it may be stated that the proposed PLA/natural fibres composite materials are an alternative solution for many fields of biomedical engineering especially for rehabilitation and orthopedic provision.

8

Zastosowanie elektrochemicznej spektroskopii impedancyjnej do oceny stopu Ti-6Al-4V ELI stosowanego w ortopedii

Pochrząst M., Marciniak J., Walke W., Kaczmarek M., Szewczenko J., Loska S.

Engineering of Biomaterials

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2011

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Vol. 14, no. 106-108

149--153

9

Hydrolytic decomposition in a polyamide/PDMS composite for orthopaedic usage

Sochor M., Balik K., Sucharda Z., Suchy T., Sedlacek R.

Engineering of Biomaterials

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2011

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Vol. 14, no. 103

2--3

10

Prognozowanie właściwości mechanicznych i korozyjnych drutów dla ortopedii

Przondziono J., Walke W.

Engineering of Biomaterials

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2009

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Vol. 12, no. 89-91

109--111

11

Odporność korozyjna drutów ze stali nierdzewnej przeznaczonych dla ortopedii

Szuła A., Przondziono J., Walke W.

Engineering of Biomaterials

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2009

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Vol. 12, no. 89-91

102--104

12

Przedoperacyjne i pooperacyjne planowanie zabiegu ortopedycznego stawu kolanowego i jego rehabilitacja

Trzeciak Z., Skalski K., Sowiński T., Kałużyńska K., Borkowski P.

Modelowanie Inżynierskie

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2008

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T. 5, nr 36

295-300

PL

W pracy zaprezentowano metodykę planowania zabiegu operacyjnego oraz jego symulację komputerową dla dwóch przypadków klinicznych: traumatologicznego i patologicznego. Po przedstawieniu metodyki badań omówiono ideę planowania zabiegu operacyjnego z uwzględnieniem współczesnego wspomagania tego procesu poprzez techniki komputerowe CT/CAD/CAE. Po przybliżeniu roli tych współczesnych technik podano przykłady ich zastosowań klinicznych. Przedstawioną metodykę zamyka program rehabilitacji pacjenta.

EN

The methodology of operation planning and computer simulation for both traumatological and pathological case is shown in the paper. After brief description of the methodology an idea of operation planning is presented. The operation planning comprises contemporary computer aided techniques, i.e. CT/CAD/CAE. The role of those techniques are presented as well as examples of their clinical applications. Rehabilitation of patient is the final step of the methodology.

13

Wpływ chropowatości podłoża na topografię warstw TiO2 i SiO2 nakładanych metodą zol-żel

Będziński R., Filipiak J., Pezowicz C., Krzak-Roś J., Kowalski M.

Engineering of Biomaterials

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2008

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Vol. 11, no. 81-84

87--89

14

The role of biomechanics in orthopedic and neurological rehabilitation

Kulig K., Burnfield J. M.

Acta of Bioengineering and Biomechanics

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2008

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Vol. 10, nr 2

3-14

EN

Movement is fundamental to human well-being, function and participation in work and leisure activities. As a result, regaining optimal movement abilities and independence frequently become central foci of rehabilitation programs developed for individuals recovering from serious orthopedic and neurologic injuries. Further, preventing additional injury to the locomotor system becomes essential for effective long-term management of chronic medical conditions such as tendon dysfunction and diabetes. The primary aim of this perspective is to illustrate the role of biomechanics in orthopedics, musculoskeletal and neurological rehabilitation. Specifically, this paper discusses selected examples, ranging from the tissue to whole body biomechanics level, that highlight how scientific evidence from the theoretical and applied sciences have merged to address common and sometimes unique clinical problems.

15

Kriostymulacja w reumatologia traumatologii, ortopedii i odnowie biologicznej. Część III - Zastosowanie kriostymulacji w leczeniu chorób zwyrodnieniowych stawów oraz innych nieukładowych chorób reumatycznych

Jezierski Cz.

Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna

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2008

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Vol. 14, nr 1

53-54

PL

W tej części publikacji omówiono problem zastosowania kriostymulacji w leczeniu spondyloartropatii: zesztywniającego zapalenia stawów kręgosłupa - zzsk (spondyloarthritis ankylopoetica), łuszczycowego zapalenia stawów - Izs (psoriatic arthritis), reaktywnego zapalenia stawów (reactive arthritis); chorób zwyrodnieniowych stawów {spondyloarthrosis, coxarthrosis, gonarthrosis); reumatyzmu tkanek miękkich (zespołu fibromialgii, entezopatii i uszkodzenia stożka ścię-gnistego rotatorów), dny moczanowej i chondrokalcynozy, chondromalacji rzepki oraz osteoporozy.

16

Simulation in Active Dynamisation Systems Design

Kołodziej D., Jasińska-Choromańska D.

Machine Dynamics Problems

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2006

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Vol. 30, No. 3

155-162

EN

Human needs are forming in a most incredible ways. People expectation to keep ability of the active life manner are changing according to techniques development that caused increasing quality in the other domains of human life. Nowadays the situation are changing from day to day in and is especially hard for the engineers. Computers techniques gives lots of tools that have to help to fulfil various expectation of the society. It force the medical engineering to create new quality of the devices that have to be ahead the present days demands.

17

Modelling of heat transfer in biomechanics - a review. P. 2. Orthopaedics

Stańczyk M., Telega J. J.

Acta of Bioengineering and Biomechanics

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2002

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Vol. 4, nr 2

3-31

EN

The aim of this paper consisting of three parts is to review available results pertaining to various heat transfer problems of biomechanics. The second part covers thermal problems specific to orthopaedics. Three classes of problems are investigated: exothermal bone cement polymerisation in situ, frictional heat generation during articulation of joint implants and frictional heat generation during bone cutting and drilling. The existing results pertaining to modelling and experimental measurements are reviewed. Thermal damage criterion is discussed and various possible means of minimising injuries to tissues are discussed. The first class of problems studied includes also our own results.

18

Zagadnienia oceny właściwości użytkowych tworzyw sztucznych do zastosowań w ortopedii

Andrysewicz E., Dąbrowski J. R.

Inżynieria Biomateriałów

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1999

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R. 2, nr 5-6

3--8

PL

W pracy przedstawiono opis badań in vitro mających na celu ocenę właściwości użytkowych wybranych tworzyw sztucznych do zastosowań w ortopedii, szczególnie dla celów ortotyki. Jako główne kryteria oceny przyjęto: właściwości fizykochemiczne wyciągów wodnych z tworzyw sztucznych, właściwości wytrzymałościowe i analizę tych właściwości po zanurzeniu w płynie modelowym (imitującym działa nie płynów ustrojowych) oraz właściwości termiczne analizowanych materiałów. Zaproponowana metodyka badań jest względnie łatwa metodycznie, tania i dostarcza dostateczną ilość danych, na podstawie których można określić możliwość stosowania ocenianych tworzyw sztucznych do zastosowań w ortopedii.

EN

The paper presents in vitro studies aimed at evaluation of the useful properties of some plastics for orthopaedic applications: especially for orthotics. Main criteria for the evaluation of materials were the following: physico-chemical properties of aqueous extracts, mechanical strength and its variations after exposure to model liquid (imitating the effect of body fluids) as well as thermal properties The suggested experimental procedure is relatively simple, cheap and provides enough data on the usefulness of the examined plastics in orthopaedics.