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1

Dynamic-passive correction of hallux valgus and associated static foot deformities

Dygut Jacek, Strąk Joanna, Detyna Jerzy, Piwowar Monika

Acta of Bioengineering and Biomechanics

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2023

|

Vol. 25, no. 1

65--77

EN

The aim of this paper was the application of a new dynamic-passive method of treatment in correction of hallux valgus and coexisting static deformities of the foot (transverse-plane and plano-valgus foot). Methods: The study involved 50 patients; 26 with full big toe correction after the passive correction grip (group I) and 24 with big toe correction requiring additional passive abduction (group II). The patients regularly performed exercises using the designed device according to the planned schedule. The progress of the correction was assessed by a medical examination and additional tests. Results: The cross-sectional area [cm2 ] of the abductor hallucis muscle in three-time points among I and II groups of patients with the hallux valgus was measured based on MRI images. The STIR examination showed, among others, the abductor hallucis muscle edema after exercises with the DPc device were carried out. It evidences that exercises with the new device activate the muscle. Alignment of the big toes of both feet in groups I and II were obtained with a statistically significant result ( p < 0.05). The percentage progression of correction for HV and I/II IM was calculated. Conclusions: Based on the new correction approach the alignment of the big toe phalanges and the remaining toes was obtained. The passive setup of the tendons with their distal inserts at the level of the big toe phalanges to the correct path of their course with the withdrawal of articular subluxations was obtained. Simultaneously, the big toe's passive correction was dynamically consolidated through a specially selected set of exercises.

2

Multifunctionalization of inert ceramic surfaces using in situ cap nucleation

Desante Gaëlle, Labude Norina, Neuss Sabine, Telle Rainer, Schickle Karolina

Engineering of Biomaterials

|

2019

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Vol. 22, no. 153 spec. iss.

36

3

Indywidualny fotel anatomiczny – nowatorska metoda prewencji wtórnej i trzeciorzędowej u pacjenta z patologią kręgosłupa

Siemianowski P., Dywel P., Andrzejewska A., Mikołajczyk K., Szypielewicz S., Topoliński T.

Aktualne Problemy Biomechaniki

|

2017

|

z. 14

45--50

PL

W niniejszej pracy przedstawiono autorską metodę wytwarzania spersonalizowanej ortezy tułowia: Indywidualny Fotel Anatomiczny. Dyskusji poddano wstępne wyniki badania klinicznego z wykorzystaniem zaproponowanego rozwiązania w aspekcie zwiększonego komfortu pacjenta z deformacją kręgosłupa. Przedstawione dane stanowią punkt odniesienia do dalszych analiz, przede wszystkim nad zasadnością stosowania wspomnianej koncepcji, szczególnie w konfrontacji z powszechnie dostępnymi na rynku, ustandaryzowanymi metodami stabilizacji.

EN

This paper presents an original method of contoured seat fabrication – an Individual Anatomical Seat. The preliminary results were discussed both in terms of increasing patient comfort with spine deformation as well as fabrication process improvements on the basic of first prototypes. This information will be the starting point for further analysis of the proposed solution appropriateness, especially confronted with other commonly used stabilization methods.

4

Projekt wstępny bioresorbowalnych implantów ortopedycznych do wspomagania rekonstrukcji więzadła krzyżowego przedniego

Muzalewska M., Wyleżoł M., Ficek K.

Modelowanie Inżynierskie

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2016

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T. 28, nr 59

47--53

PL

Artykuł dotyczy opisu wstępnego etapu projektowania i modelowania postaci konstrukcyjnych bioresorbowalnych implantów ortopedycznych do wspomagania rekonstrukcji więzadła krzyżowego przedniego (Anterior Cruciate Ligament - ACL). Głównym zadaniem wspomnianych implantów powinno być utworzenie – w kanale kostnym - „rusztowania” dla wszczepionego przeszczepu, będącego substytutem zerwanego więzadła. Implant taki nie tylko ma precyzyjnie zakotwiczyć przeszczep w kanale kostnym, ale przede wszystkim - dzięki możliwości perfuzji krwi oraz bioresorbowalnym własnościom docelowego tworzywa - przyspieszyć wrastanie tkanki kostnej w przeszczep. Pomysł nadania postaci konstrukcyjnej implantom jest rozwinięciem wynalazku opatentowanego przez dra hab. n. med. K. Ficka.

EN

The article concerns the description of the initial stage of designing and modeling designing form of the bioresorbable orthopedic implants to support reconstruction of the anterior cruciate ligament (Anterior Cruciate Ligament - ACL). The main purpose of these implants should be to create - in the bone canal - "scaffolding" for the implanted graft, which ruptured graft which is a prosthesis of the broken ligament. The implant would not only has a precisely to anchor the graft in the bone canal, but above all - thanks to the possibility of blood perfusion and bioresorbable properties of the target material - to accelerate the ingrowth of bone tissue in the transplanted tendon. The idea of giving the structural form of the implants is a development of the invention patented by MD PhD, DSc K. Ficek.

5

Application of FFF Method in Orthopedics

Kiełbus A., Furyk-Grabowska K., Ostrowska K.

Machine Dynamics Research

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2016

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Vol. 40, No. 3

67--78

EN

As a part of realization of international project "3DCENTRAL - Catalyzing Smart Engineering and Rapid Prototyping" the cooperation with 3DFly enterprise and Lewkowicz Orthopedic Studio has been started concerning production of hand epithesis with use of method Fused Filament Fabrication (FFF). In the article, two different cases of producing the epithesis was described, as well as the process of creating the cover of the lower extremity adjusted to the patient’s needs.

6

Simulations in orthopedics and rehabilitation - Part 2: Computer simulations

Dygut J., Piwowar P., Gołda M., Popławski K., Jakubas R., Gonzales G., Piwowar M.

Bio-Algorithms and Med-Systems

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2016

|

Vol. 12, no. 4

159--168

EN

Simulations in medicine have already become the mainstream trend in the field of research and education. It includes simulations on simulators through which students are afforded the opportunity to train manual skills as well as series of simulations that enable one to train not just motor and manual skills alone. Some of these offer the student the basis to train decision-making process and conduct experiments that visualize biological phenomena that are important from a doctor’s perspective. The authors have done a review of medical computer simulations and found that simulations in medicine focus, in respect of the issues raised, on techniques and computer science aspects. The first one is discussed in the paper “Simulations in orthopedics and rehabilitation – Part I: Simulators.” The second one is discussed in this paper. In the paper, the authors focus on computer simulations, in the broadest sense, presenting them while taking into consideration the distinction between simulations used for the following purposes: test (conducted under laboratory conditions), training (incorporated into school, universities syllabus), and diagnostic and therapeutic (within the hospital, clinics, private medical practice).

7

Simulations in orthopedics and rehabilitation - Part 1: Simulators

Dygut J., Piwowar P., Gołda M., Popławski K., Jakubas R., Gonzales G., Piwowar M.

Bio-Algorithms and Med-Systems

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2016

|

Vol. 12, no. 4

147--157

EN

Nowadays, medical simulators and computer simulation programs are used to train various skills required in medicine. The development of medicine, including orthopedics and rehabilitation, has meant that resident physicians, within a much shorter period of time, must acquire the knowledge and skills that their older colleagues gained over years, learning as they operated on patients. For this reason, simulation very often helps the doctor and others engaged in health care train some techniques necessary during the work before they start working in a clinical environment. They have a chance of fine-tuning certain skills under nonclinical environment. On the other hand, simulation techniques are used in medical scientific research to know and explain the different biological processes that can be used for better patient treatment in the future. In this paper (Part I), the authors focused on the presentation of different types of simulators for the following purposes: test (conducted under laboratory conditions), training (incorporated into school, universities syllabus), diagnostic and therapeutic (within the hospital, clinics, private medical practice).

8

Student medical education with the real orthopedic case presented as interactive computer simulation

Dygut J., Płonka S.

Bio-Algorithms and Med-Systems

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2015

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Vol. 11, no. 1

59--67

EN

This article presents an example application of an e-learning tool for presenting cases with the aim of acquainting medical students with the procedures performed by a court expert in assessing causes and effects of an accident at work. Methods: The present publication is based on medicolegal expertise dealing with the case of a 51-year-old manual worker of a carpentry company who, due to lack of proper training in handling the machine, severely injured his hand. The main advantage of this publication is the presentation of a series of cause-effect events at every stage of the patient’s treatment that led to minor and major complications and adverse effects. Their starting point was the employer’s evident error, i.e., failure to provide the worker with proper training in handling the machine. Results and conclusions: The discussed orthopedic case has been implemented in the CASUS base (mainly using the program “Virtual Patients” as tool for case presentation) in the form of a description of a properly carried out diagnostic procedure and equipped with the expert’s opinion and explanation of possible inappropriate decisions.

9

Selected aspects of magnesium alloys melting technology

Gawlas-Mucha A., Nowosielski R., Babilas R., Guwer A.

Selected Engineering Problems

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2014

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nr 5

33--36

EN

Magnesium alloys are new class of biodegradable materials usually called as bioresorbable biomaterials for orthopedic applications. The potential benefits of Mg alloys are the nearer modulus of elasticity to the bone than stainless steel or titanium, biocompatibility and bone-active properties and the elimination of necessity of a second operation to remove the implant body. Two- component Mg-Ca alloy is characterized by a solid solution limit, and creates a stable intermetallic phase Mg2Ca. Studied samples were prepared by melting starting material in an induction furnace in a quartz crucible.The micro chemical analysis of samples using a scanning electron microscope with EDS was performed. Values of the microhardness of materials were compared before and after remelting.

10

The ability of S.aureus to form biofilm on the Ti-6Al-7Nb scaffolds produced by Selective Laser Melting and subjected to the different types of surface modifications

Szymczyk P., Junka A., Ziółkowski G., Smutnicka D., Bartoszewicz M., Chlebus E.

Acta of Bioengineering and Biomechanics

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2013

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Vol. 15, no. 1

69--76

EN

The Gram-positive coccus, Staphylococcus aureus, is the leading etiologic agent of limb and life-threatening biofilm-related infections in the patients following the orthopaedic implantations. The aim of the present paper is to estimate the ability of S. aureus to form biofilm on titanium alloy (Ti-6Al-7Nb) scaffolds produced by Selective Laser Melting (SLM) and subjected to the different types of surface modifications, including ultrasonic cleaning and chemical polishing. The results obtained indicate significantly the decreased ability of S.aureus to form biofilm on the surface of scaffolds subjected to the chemical polishing in comparison to the scaffolds cleaned ultrasonically. The data provided can be useful for future applications of the SLM technology in production of Ti-6Al-7Nb medical implants.

11

Use of Active Dynamisation Mode in the External Bone Fixation System

Kołodziej D., Jasińska-Choromańska D.

Machine Dynamics Research

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2012

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Vol. 36, No. 2

57-63

EN

The paper considers problems related to healing of long bones with application of an apparatus for external fixation of the bone fragments and mechanical stimulation of the osteogenic processes taking place in the interstice within the region between the bone fragments, which exist due to the applied method of functional healing of bone fractures. The presented problem is related to a technological approach to the essential healing process and rehabilitation of the motor system of the patient with structural destabilization - fracture of the long bone of the lower limb, regarding the biological aspects of the phenomenon of osteogenesis as a source of inspiration, and not the main subject of the considerations.

12

Thermal behaviour of functionally graded sodium-containing calcium phosphates

Goncharenko A., Rokhmistrov D., Zyman Z.

Engineering of Biomaterials

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2012

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

139

EN

Hydroxyapatite (HA), ß-tricalcium phosphate (ß-TCP) and their mixtures have been successfully applied in orthopedic, oral and maxillofacial surgery [1]. Calcium phosphate (CP) bioactive ceramics based on HA is usually fabricated of appropriate powders. Unfortunately, mechanical properties of such material are in general worse than those of human bone. Therefore, there is a necessity for development of new ceramic CP composites with improved characteristics. An effective biomaterial must simultaneously possess various, often contradictory, properties [2]. A functionally graded material (FGM) with gradients in composition, phase and microstructure from the surface to the interior can better satisfy such combined requirements. Recently, FGM's of sodium-containing calcium phosphates were prepared expecting them to have improved circumstances for bone formation and bonding [3-4]. The aim of this work was to study the thermal behavior of FGM's of sodium - containing calcium phosphates prepared by an original route. The initial powder was prepared by a simple one-step precipitation using Ca(NO3)2 and Na3PO4 reactants. The synthesis reaction resulted, besides HA, in the by product NaNO3. However, the latter was not washed out of the precipitate but rather used as a source of sodium for ceramics preparation. An original molding step was used resulted in gradient distribution of NaNO3 in compacts. They were sintered under usual conditions. It has been found that the linear (or volume) shrinkage and the density slightly changed in the fired compacts below 1100°C. However, the consolidation abruptly increased at 11000C. The poor sintering is associated with NaNO3 decomposition during heating and firing at temperatures below 11000C. At higher temperatures, reactions between HA particles and products of NaNO3 decomposition occurred and dif¬fusion processes were intensified. Due to the gradient distribution of NaNO3 in the compacts, the indicated thermal processes resulted in formation of functionally graded ceramics (having in particular a phase gradient from the surface to the interior as Na3Ca6(PO4)5\to ß- rhenanite\to Na+ solid solution in HA).

13

System szybkiej numerycznej analizy podatności wybranych układów aparatu Ilizarowa

Bućko S., Forma K., Herdzina M.

Aktualne Problemy Biomechaniki

|

2009

|

z. 3

17--22

PL

W pracy przedstawiono nakładkę do programu ANSYS umożliwiającą prowadzenie szybkich obliczeń jak również optymalizację wybranych układów aparatu Ilizarowa. Praca przedstawia praktyczną realizację idei budowy pakietu obliczeniowego pozwalającego na szybki montaż modelu obliczeniowego układu aparatu Ilizarowa z zespołu przygotowanych, szeroko stosowanych elementów, bazując na dwóch pierścieniach. Aplikacja prowadzi użytkownika przy tworzeniu modelu obliczeniowego aparatu, pozwalając wybrać oczekiwaną opcję oraz zapewnia uzyskanie wyniku - podatności układu w czasie kilku sekund.

EN

This paper treats about a cooperating with ANSYS application, which enables fast analysis and optimization of chosen configurations of Ilizarov apparatus. Idea of an engineering software providing fast modeling, using common elements and basing on two rings is presented. User is carried through designing a model, choosing options and in the end getting results - compliance of the chosen configuration of Ilizarov apparatus in just a few seconds.

14

Kriostymulacja w reumatologii, traumatologii, ortopedii i odnowie biologicznej

Jezierski C.

Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna

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2007

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Vol. 13, nr 3

240-242

PL

W leczeniu wielu chorób reumatycznych ważnymi i nieodłącznymi czynnikami leczenia są zabiegi fizjoterapeutyczne. Do stosowanych od dawna czynników fizykalnych, balneoterapii, masażu i kinezyterapii wprowadzono do leczenia od 1980 roku (w Polsce od 1983) zabiegi kriostymulacji. Na podstawie wieloletnich doświadczeń należy stwierdzić, że w celu uzyskania wyraźnych efektów leczniczych konieczne jest różnicowanie wskazań, metodologii i techniki zabiegów już nie tylko w odniesieniu do jednostki chorobowej, ale indywidualnie - dla każdego pacjenta. W leczeniu chorób reumatycznych zabiegom kriostymulacji towarzyszy odpowiednio dobrana kinezyterapia. W inny sposób oraz innymi metodami kriostymulacji i kinezyterapii należy posługiwać się w leczeniu układowych chorób tkanki łącznej, a innymi w leczeniu np. choroby zwyrodnieniowej stawów. W niniejszej publikacji omawiany jest problem stosowania kriostymulacji u pacjentów leczonych z powodu najczęstszych układowych chorób tkanki łącznej. Ich wspólne cechy to fakt, że są chorobami układowymi, zapalnymi, immunologicznie zależnymi, przewlekłymi (1).

15

Poszukiwanie nowych technologii i metod leczenia w ortopedii, traumatologii i rehabilitacji

Frańczuk B., Kotela I.

Inżynieria Biomateriałów

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2003

|

R. 6, nr 30-33

127-130

16

Biomateriały żelowe w ortopedii - badania in vivo

Łączka M., Cholewa-Kowalska K., Niedzielski K.

Inżynieria Biomateriałów

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2001

|

R. 4, nr 17-19

16-18

17

Computer modelling and simulation techniques as a tool for aiding the design of orthopaedic unilateral external fixators - focused on innovative solutions

Jasińska-Choromańska D.

Engineering Transactions

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2001

|

Vol.49, iss.2/3

395-415

EN

The paper presents the methods of modelling and simulation of the bone-external fixator system for fracture healing of long bones. Special emphasis was put on relations between clinical assumptions and the applied analytical and simulation apparatus. Concepts of application of heuristic techniques based on artificial neural networks for studying the process of bone union are presented. Together with the results of the simulation studies, some results of the examinations performed under clinical conditions are presented.

18

Fuzzy logic implementation for a foot pathology recognition

Zyguła J.

Journal of Medical Informatics & Technologies

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2000

|

Vol. 1

CS 57--63

EN

The paper presents the data base structure where fuzzy logic defines the threshold of the foot abnormality. The conclusion making unit supports Parotec System for Windows (PSW) [1], the diagnostic equipment that allows to discus the diseases factors observed on a patient’s static and dynamic footprint. The fuzzy logic roles are used for pathological features selection. They classify the data records putting them into the most relevant pathology. The presented system allows to enter roles describing the disease instead of giving a strict definition. When number of roles grows the fuzzy threshold is getting the strict value. The early results of the system development are described in the paper. The conclusion making unit has been evaluated by several records. For full evaluation of the system more experiments are planed to be done in clinics.

PL

Praca prezentuje system wspomagania diagnozy wykorzystujący regułową bazę wiedzy z pojęciami rozmytymi. System nie rozpoznaje schorzeń, lecz podpowiada patologie związane z nieprawidłowym (nie fizjologicznym) obciążeniem wybranych stref stopy w statyce i dynamice. Informacją potrzebną do prawidłowego funkcjonowania systemu jest zbiór pomiarów pozyskanych przy użyciu narzędzia Parotec System for Windows (PSW). Drugim elementem wykorzystywanym w procesie wnioskowania jest baza wiedzy z regułami rozmytymi ekstrahowana od lekarza – eksperta. Wiedza zapisywana jest w formie koniunkcji warunków pierwotnych opartych na relacji wartości funkcji filtracji do lingwistycznego pojęcia względnego – oddającego wartość wybranego czynnika do odpowiedniej wartości dla całej populacji zebranej w bazie pomiarów. W dynamicznym procesie wnioskowania udostępniono trzy metody wyznaczania term (trójkąty o równych i nierównych podstawach) obejmujących całą dziedzinę pomiarów, oraz odrzucenie pomiarów obarczonych błędem przypadkowym wykraczających poza odchylenie standardowe wyznaczone funkcją Gaussa. Prezentowany system udostępnia możliwość wprowadzania reguł w sposób opisowy bez konieczności dokładnej analizy wartości wielkości mierzonych przez PSW. W procesie defuzyfikacji wyznaczona jest ostra wartość wynikła z superpozycji wartości warunków pierwotnych składających się na regułę wnioskowania lecz końcowym rezultatem diagnozy jest pojęcie rozmyte opisujące „natężenie” występującej patologii.

19

Biomechanika inżynierska stan obecny i perspektywy rozwoju

Będziński R.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

|

1999

|

z. 10

15-22

PL

Inżynierowie biomechanicy, lekarze medycyny, rehabilitacji muszą wspólnym wysiłkiem podejmować badania interdyscyplinarne dotyczące przywracania funkcji życiowych człowieka. W pracy przedstawiono podstawowe problemy biomechaniki inżynierskiej w szczególności dotyczące implantacji, przebudowy struktur kostnych. Na podstawie literatury oraz doświadczeń własnych przedstawiono przykłady koniecznej współpracy lekarzy i inżynierów aktualnie oraz w przyszłości.

EN

Biomechanics, life scientists and physicians have teamed together and functioned with a combined effort in many interdisciplinary fields of endeavour. The paper deals with basic problems of engineering biomechanics, especially implantation, remodelling, shielding. Basing on the literature and own experience, examples of co-operation between engineers and medical doctors arc discussed together with future tendencies of development of biomechanics engineering.