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Tytuł:
Differences in Lumbar Spine Load Due to Posture and Upper Limb External Load
Autorzy:
Kamińska, J.
Roman-Liu, D.
Zagrajek, T.
Borkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/89864.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
finite element model
muscle co-operation
spine load
lumbar spine
Opis:
As the lumbar region of the spine is particularly predisposed to musculoskeletal disorders, the aim of this article was to assess lumbar spine load on the basis of an accurate model of this part of the body. The model was developed with the finite element method and the energy criterion for optimising muscle work. Computer calculations confirmed that stresses and compression forces in intervertebral discs increased with an increase in the load force and that they were significantly larger in the bent forwards posture than in the erect posture. This result clearly shows that lifting light objects and the erect posture are important elements in minimising spine load.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 421-430
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tribological investigations of materials used for spine disc implants
Autorzy:
Gierzyńska-Dolna, M.
Lijewski, M.
Wiśniewski, T.
Magda, J.
Powiązania:
https://bibliotekanauki.pl/articles/285768.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implants
tribology
spine
Opis:
Ailments linked to back pain is a serious problem not only medical but also social. Not only elder people but also people in working age suffers from problems related to spine pain. The most common disorders of the spine are pain syndromes of the lumbar part where center of gravity of the human body is located and w here major forces are acting on the vertebrae and intervertebral discs. The market currently offers a variety of spinal implant solutions (FIG 1). In the Metal Forming Institute there is realized research Project entitled Investigations and spine implants functionality evaluation in material and tribological aspects. In the frame of the Project it was designed and manufactured special simulator adapted for intervetebrals pine discs implants investigations. Simulator scheme is presented on FIG. 2. Main goals of the realized Project are: • Investigation of friction-mechanical processes during implant usage. • Evaluation of wear intensity of various types of intervertebral discs and investigations of appearing wear products. • Selection of optimal material and surface machining method providing minimal wear of intervertebral disc elements wear. For experiments there was implant designed by K. Skalski and J. Skoworodko selected [1], which consists of 3 elements: upper liner, lower liner and nucleus pulpous (FIG. 3). Actually there are 3 types of friction couple materials tested: 316L steel - polyethylene UHMWPE – 316L steel, titanium alloy Ti6Al4V – polyethylene UHMWPE and nitrided Ti6Al4V titanium alloy – polyethylene UHMWPE. In fluence of number of cycles on friction coefficient, surface roughness and poliethylene linner thickness change illustrates FIG. 4. As it results from performed investigations, too high hardness level of metal elements (upper and lower clasps) provides to accelerated wear of the polyethylene part. New challenge is application of “metal-metal” friction couple.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 44-45
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bowen Technique for patients with low back pain
Autorzy:
Kopczyńska, Ewelina
Malak, Roksana
Kostiukow, Anna
Samborski, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/1178229.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bowen Technique
Bowtech
lumbar spine pain
non-specific lumbar spine pain syndromes
Opis:
Non-specific lumbar spine pain syndromes (nslsp) are currently the most common ailment. There are many physiotherapeutic methods that reduce pain and improve the functional status of patients. One of them is Bowen Technique (BT), which is a little-known fascial therapy and is characterized by a holistic approach to the patient. The aim of the study was to assess the effectiveness of BT in patients with non-specific lumbar spine pain syndromes. We examined 50 patients aged 25-60 (the average age was 39.92, SD ± 9.510, median 37.0). An interview was conducted with each patient. Functional examination based was done four times. It included Revised Oswestry scale, Low Back Pain Disability Scale measurements of the range of motion of the lumbar spine and Visual analogue scale (VAS) was used to describe the pain of patients. Eeach patients attended into three procedures of Bowen Therapy. The pain in the lumbar spine decreased after the first TB and its level is constantly reduced with each subsequent procedure. Analyzing all subjects, statistically significant differences were visible between the state before therapy and each subsequent examination, as well as between the first and the third treatment. In the subjects, the health condition is improved, and more precisely, the intensity of pain, the frequency of its occurrence and the increase in independence were reduced. A study showed that there was a statistically significant improvement in patients' health due to therapy. The ranges of motion of the lumbar spine as a result of the therapy increased. The assessment of TB therapy after the first treatment is mostly good, and after the third 66% of respondents assess as very good. The number of patients who are very satisfied with the effectiveness of the treatment increases from the procedure to the procedure.
Źródło:
World Scientific News; 2018, 93; 68-81
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel kinematic model for a functional spinal unit and a lumbar spine
Autorzy:
Ciszkiewicz, A.
Milewski, G.
Powiązania:
https://bibliotekanauki.pl/articles/307224.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
kręgosłup
stabilizacja kręgosłupa
analiza strukturalna
spine stabilization
spine guiding mechanism
structural analysis
Opis:
Purpose: The aim of this paper is to present the novel model for the functional spinal unit and spine designed as a rigid mechanism and solve it with methods commonly used in robotics. Method: The structure of the intervertebral joint is analyzed with special attention paid to elements defining the displacements in the joint. The obtained mechanism is then numerically solved using a constraint equations method. Results: The input data set for the simulation is prepared using the 3D scan of the lumbar spine. The simulation results show that the intervertebral joint mechanism can satisfy the ranges of flexion, lateral bending and axial rotation as compared with literature data. It is also possible to study complex, coupled displacements of the lumbar spine segment. Conclusions: Structural analysis of the functional spinal unit with methods common in robotics can eventually lead to better understanding of stabilizing and guiding mechanisms. The proposed mechanism can be used as a reference in the study of spine guidance. It can reproduce the angular displacements of the actual functional spine unit. It is also possible to expand the model to facilitate the analysis of a lumbar spine segment.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 1; 87-95
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cervical spine injuries in Poland – epidemiology, divisions, and causes
Autorzy:
Wolan-Nieroda, Andżelina
Maciejczak, Andrzej
Guzik, Agnieszka
Przysada, Grzegorz
Wyszyńska, Justyna
Szeliga, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/454659.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
epidemiology
cervical spine
injury
Opis:
Aim. The aim of the study was to review the literature on the prevalence of cervical spine injuries divided between the level of the injury and the causes of fractures. Material and methods. A review of Polish and foreign literature was performed. The following databases were searched: PubMed, Medline, Science Direct, Termedia, and Polish Medical Bibliography. Literature analysis. In Poland the incidence of spinal injuries, including damage to the cord, is estimated at the level of 25–35 persons per one million of the population, half of these being cervical spine injuries. More than one in three of all spinal injuries affect the atlantoaxial and occipital area. It is estimated that axis fractures occur in up to 40% of the cases involving cervical spine injury. Odontoid fractures constitute 10–15% of all cervical spine fractures. Hangman fractures account for 20% of vertebral fractures. Cervical spine injuries more frequently occur in males than in females, and the relevant rates for males are from 1.5 to 2.7 times higher. The most common causes of cervical spine injuries include road traffic accidents, accounting for 33 to 75% of the cases, falls from heights (15–44%) and sports injuries (4–18%). Cervical spine injuries are most often diagnosed in subjects over thirty years of age. Such injuries most commonly are related to the second, fifth and sixth cervical vertebrae. On the other hand damage to the first and second cervical vertebrae is often observed in the same patients who are found with injury to lower cervical vertebrae (approx. 9% of the cases). In the group of advanced age subjects the most frequent cervical spine injuries are axial fractures and they are diagnosed in 15% of adult patients with cervical spine fractures.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 1; 66-70
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE RELATIONSHIP BETWEEN THE EXPERIENCE OF NEGATIVE FEELINGS AND QUALITY OF LIFE AND THE SOCIO-DEMOGRAPHICAL FACTORS OF PATIENTS TREATED FOR DISCOPATHY OF THE LUMBAR SPINE
Autorzy:
Girzelska, Joanna
Chomicki, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/2137980.pdf
Data publikacji:
2021-02-23
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
pain
depression
spine surgery
Opis:
Most of the pathological changes in the spine begin with the physiological loss of intervertebral disc function. Discopathy of the lumbar spine leads to a significant deterioration in the quality of life, which is why the therapeutic team strives is to improve patients quality of life through actions aimed at reducing spinal dysfunction to an extent that allows for human functioning. The research aim was to determine the quality of life of patients who had been treat- ed as a result of discopathy of the lumbar spine and to establish the relationship between the experience of negative feelings and a subjective assessment of the quality of life with factors resulting frompatient socio-demographics. The study included 110 patients treated for lumbar discopathy. A diagnostic survey method was employed as a research technique, with the use of a proprietary survey questionnaire. Statistic analysis of the results was performedusing the statistical package PQStat v1.6.6. Subjective evaluation of patients quality of life in 66 persons (60%) was at an average level, only 6 (5.45%) respondents rated the quality of their lives as being higher. Those living in towns of up to 50,000 residents rated their quality of life higher (6.21), with the lowest level being reported by those living in the countryside (4.95). Age did not influence significantly the quality of life, but older people most often experienced pain (p=0.4). Analysis of variance did not show statistically significant differences between marital status and respondent quality of life (p = 0.53) but did show significant differences between education levels and the incidence of negative feelings such as fear, anxiety or depression. Socio-demographic variables: such as gender, age and marital status do not significantly differentiate the quality of life of the respondents. There is a relationship between experiencing negative feel ings and educational levels. The lower the education level obtained, the more often negative feelings are experienced. The experiencing of negative feelings and disease duration are variables that reduce the quality of life of respondents. ------------------------------------------------------------------------------------------------------------------------------------
Źródło:
Acta Neuropsychologica; 2021, 19(1); 93-104
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of spinal pain on daily living activities in postmenopausal women working in agriculture
Autorzy:
Raczkiewicz, Dorota
Owoc, Alfred
Sarecka-Hujar, Beata
Saran, Tomasz
Bojar, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/989957.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
menopause
spine pain
ndi
odi
Opis:
Introduction and objective. Postmenopausal women working in agriculture suffer from spinal pain for two overlapping reasons, the first is related to the menopause and the second to the specificity of rural work, which includes lifting heavy objects and changing weather conditions. Spinal pain affects the daily life of women as well as their ability to work. The objective of the study was to analyse the impact of spinal pain on activities of daily life in Polish postmenopausal women performing agricultural work. Materials and method. The study was conducted in 2016 in Poland and included 1,119 post-menopausal women living in rural areas and working in agriculture. The women assessed the severity of spinal pain in 3 sections: neck, thorax and lumbar. Neck Disability Index (NDI) and Oswestry Low Back Disability Index (ODI) questionnaires were used to assess the impact of spinal pain on daily life activities. Generalized linear models were estimated in statistical analyses. Results. Postmenopausal women working in agriculture suffered most often from pain in the lumbar spine, less frequently in the neck, and the least in the thoracic. The most common was an isolated pain in only one section of the spine. Spinal pain disturbed the most the women’s rest, standing, lifting objects, while sleep, concentration, and walking the least. The impact of spinal pain on the activities of daily life, on average, was moderate, and increased with greater pain severity, the earlier the age the pain started, the higher the body weight, the lower education level and if there was a co-existing pain in any of the other spine sections. The impact of spinal pain on daily life activities did not depend on age between 45–65, WHR, age at last menstruation, parity, and number and types of births. Conclusions. The impact of spinal pain on daily life activities in postmenopausal women working in agriculture was assessed as moderate, on average, and depended mainly on spinal pain-related characteristics, such as severity, age at onset and co-existence of pain in any other spinal sections.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower extremity and spine pain in cyclists
Autorzy:
Piotrowska, Sylwia Ewa
Majchrzycki, Marian
Rogala, Piotr
Mazurek-Sitarz, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/989999.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
cycling- injuries
lower extremity
spine
Opis:
Introduction. The number of cyclists increases each year. Some people treat cycling as a passion and practice it at every possible occasion, while for others it is a mean of transport or a form of relaxation at the weekend. However, very few people realize that cycling can also have a negative impact on their health. Objective. To assess the prevalence of lower extremity and spine pain in cyclists, and evaluate the influence of various factors causing it. Materials and method. The study was performed on 167 subjects during amateur cycling competitions in the Greater Poland and Kuyavian-Pomeranian Provinces. A specially prepared questionnaire was used in the study. The questions related to the pain caused by cycling, the character and the localization of the pain, and the presence of warm-up and stretching. Results. Knee pain was reported in 40% of the study subjects (mostly anterior pain – 26%). Spine pain was reported in 41% of the studied athletes, where 26% was related with the lumbar spine. Variables, such as age, weight, age, BMI, training experience and number of hours devoted to training per week had no influence on the incidence and the localization of leg pain, but it had influence in the case of spine pain. Stretching after cycling was the factor which significantly distinguished the studied groups with regard to the incidence of knee pain. Conclusions. The most common type of leg pain was knee pain (anterior knee pain) whereas spine pain was most commonly reported in the lumbar spine. Statistical analysis showed that spine pain is more often reported by people who are older, have higher weight, and people who spend more time training per week. Warm-up and stretching after cycling are recommended to cyclists who experience pain.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE EFFECT OF SCHOOL PHYSICAL EDUCATION PROGRAMMES ON LOW-BACK PAIN IN SCHOOLCHILDREN
Autorzy:
Rodríguez-García, Pedro L.
López-Miñarro, Pedro A.
Santonja, Fernando M.
Powiązania:
https://bibliotekanauki.pl/articles/449204.pdf
Data publikacji:
2013
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
spine
physical exercises
children
adolescents
Opis:
Objective: to evaluate the efficacy of a 32-week school physical education programme on low-back pain in elementary and secondary schoolchildren. Material and methods: Forty-one elementary school children (fifth-grade, mean age of 10.27 ± 0.31 years) and 43 secondary school adolescents (twograde, mean age of 13.46 ± 0.68 years) were assigned to the control (n = 40) or intervention group (n = 44). The intervention subjects were involved in an organised physical education programme including hamstrings stretching, endurance strength of the abdominal and lumbar muscles, and pelvic tilt during the two-weekly school physical education classes over 32 weeks. The control group was not subjected to the organized programme. Low back pain was registered and pain intensity was recorded using the Visual Analogue Scale. Results: The experimental group showed a statistically significant decrease of low back pain frequency while the control group evidenced an increase. For pain intensity no significant differences were found. Conclusion: The children and adolescents who were subjected to the school physical education programme showed a reduction of low back pain frequency, while a tendency toward the rising frequency of low back pain was detected for the control subjects.
Źródło:
Journal of Physical Education & Health - Social Perspective; 2013, 2, 4; 43-48
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk assessment system in the production process of medical devices on the basis of dynamics spine corrector
Autorzy:
Kaczmarek, W.
Kamiński, G.
Mianowski, K.
Rosołek, R.
Gołaszewski, T.
Woch, M.
Głyda, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068890.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk assessment
dynamics spine corrector
Risk Priority Number
scoliosis
rehabilitation of the spine
Opis:
The article presents the methodology involved in creating a risk analysis of medical devices. General regulations contained in the PN-EN ISO 14971 provide manufacturers of medical basis for the concretization of standards in the form of risk assessment system for a particular process and product. However, there is no top-down regulations defining the level of acceptable risk and the decision to determine its value rests with the manufacturer. Effectiveness of taken measures was tested on the example of a analysis of dynamics spine corrector – medical device that is allowing independent rehabilitation under the supervision of a physiotherapist and current control of the kinematics and dynamics of the human spine.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 1; 67--72
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of fencing training (technical and tactical) on selected features of shape of the spine and pelvis under load
Autorzy:
Kaiser, Alicja
Sokołowski, Marek
Mrozkowiak, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1055051.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
fencing
kyphosis
pelvis
posture
spine
Opis:
The aim of the research was to assess influence of a 90-minute specialist fencing training on selected features of the spine and pelvis under a vertical load in a group of young competitors. The research was carried out in 2015 among 23 fencers (mean ± SD, age: 16 ±1.20 years; body height: 168.4 ±4.68 cm; body weight: 54.7 ±8.26 kg). The method involved measurement of thirty features, describing spatially pelvis and physiological spinal curvature under a vertical load, constituting 1/3 of the body weight before and after specialist training. Statistically significant disturbances in vertically overstretched posture occurred after the training among examined boys within the following features: increase in length of left side scoliosis, progression of lumbar lordosis and lumbosacral spine, increase of the trunk extension angle and shoulder asymmetry. Among examined girls statistically significant changes occurred only within pelvis area: increase of left pelvic tilt in the coronal plane, decrease of right pelvic tilt in the horizontal plane. Adjustment in deficiencies within hip joints movement, increase pelvis and lower limbs muscle strength in girls’ training is necessary. What is recommended for all competitors is prophylaxis of the spinal pain syndrome and expanding endurance shaping exercises during a training unit.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2017, 18, 2; 33-40
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The dependence on posture of temporalis and masseter bioelectrical muscle activity
Ocena aktywności bioelektrycznej mięśni skroniowych i żwaczy w zależności od postawy ciała
Autorzy:
Kielnar, Renata
Mika, Anna
Oleksy, Łukasz
Jureczko, Paweł
Marchewka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1963078.pdf
Data publikacji:
2011
Wydawca:
Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie
Tematy:
SEMG
cervical spine
masticatory system
Opis:
Background: Masticatory dysfunctions are a common problem in society today. Disorders such as clenching, bruxism can lead to a loosening of teeth in the jaw, abrasion of the tooth crowns, inflammatory changes, and ultimately degenerative changes in the temporo-mandibular joints.Aim: The aim of this study was to assess the relationship between masseter and temporalis anterior muscles activity and body posture.Material and Methods: In 20 subjects (20-35 years) the sEMG of the masseter and temporalis anterior muscles was measured twice during functional clenching: in casual posture and in posture with the head in retraction. The study was conducted using sEMG Tele-Myo (Noraxon). Results: The bioelectrical activity of the evaluated muscles was significantly higher in the casual posture than in retraction (p<0.05). Temporomandibular disorders appear not only due to facial muscle activity abnormalities, but also due to incorrect body posture, especially a head forward posture. The measurement was performed twice in a sitting position: in casual posture and in a posture with the head in retraction. Mean masseter activity during teeth clenching was statistically significant in retraction compared to the habitual position (p<0.05), both for the left and right side. There was also statistically significant activity in the temporalis muscles in retraction compared to the habitual position.Conclusion: The observed decreased activities in both the masseters and temporalis muscles suggest that masticatory system dysfunctions may not only be the result of dysfunction in the craniofacial region but also may be posture dependent.
Źródło:
Medical Rehabilitation; 2011, 15(4); 10-14
1427-9622
1896-3250
Pojawia się w:
Medical Rehabilitation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chaetognath grasping spines from the Upper Mississippian of Arkansas [USA]
Autorzy:
Doguzhaeva, L A
Mutvel, H.
Mapes, R.H.
Powiązania:
https://bibliotekanauki.pl/articles/23070.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
grasping spine
fossil
USA
protoconodont
organic spine
phosphatized fossil
morphology
Arkansas
ultrastructure
Chaetognatha
paleontology
chaetognath
Opis:
Previously unidentified tiny (about 0.5 mm in length), hollow, gently curved, serrated spines probably originally composed of horny, organic fibers from the Upper Mississippian (Middle Chesterian = Namurian A equivalent or lower Serpukhovian) of Arkansas (USA) are described, and their probable chaetognath affinities are discussed. The specimens are preserved in an oval accumulation (about 15 mm long and 6 mm wide) of approximately 200 specimens within a small (about 25 mm in length) phosphatic concretion. For comparison, the grasping spines of the Recent chaetognath Eukrohnia hamata were examined. The Arkansas specimens are named Eoserratosagitta serrata gen. et sp. nov., and this genus is assigned to the Phylum Chaetognatha. The Upper Mississippian spines are also compared with protoconodonts. This comparison supports the hypothesis that the chaetognaths may have existed in the Cambrian.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of a new type of artificial lumbar disc
Komputerowo wspomagane projektowanie nowego typu protezy krążka międzykręgowego
Autorzy:
Borkowski, P.
Kędzior, K.
Krzesiński, G.
Skalski, K. R.
Wymysłowski, P.
Zagrajek, T.
Powiązania:
https://bibliotekanauki.pl/articles/282071.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
spine biomechanics
implants
FEM
disc prosthesis
Opis:
The replacement of a damaged lumbar disc by an artificial organ is still not satisfactorily solved problem of surgery. In the study, the finite element method together with CAD programs and experimental validation was used in investigations of a new type of artificial disc for lumbar spine. The present 3D parametrical FE models take into account nonhomogenous properties of tissues, contact with friction between the parts of the analysed systems, large strains and large displacements. The stress analyses were performed for the prostheses being in clinical use and for some new designs. The conclusions concern most important determinants of the mechanical quality of the intervertebral disc prosthesis.
Zastąpienie lędźwiowego krążka miedzykręgowego przez protezę jest wciąż nie w pełni rozwiązanym problemem chirurgii. W pracy zastosowano metodę elementów skończonych, techniki CAD oraz metody weryfikacji eksperymentalnej do poszukiwania konstrukcji nowego typu sztucznego krążka dla odcinka lędźwiowego kręgosłupa. Prezentowane modele metody elementów skończonych uwzględniają niejednorodne właściwości tkanek, występowanie dużych deformacji oraz oddziaływania między poszczególnymi częściami analizowanej struktury. Analizy przeprowadzono dla protez stosowanych obecnie w praktyce klinicznej oraz dla kilku nowych propozycji konstrukcji. Wnioski dotyczą najważniejszych czynników o charakterze mechanicznym, które wpływają na jakość sztucznych krążków międzykręgowych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 2; 253-268
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An approximate mathematical model binding the height and position of lumbar vertebrae in the canine spine
Autorzy:
Wadowska, I.
Dzierzęcka, M.
Paśko, S.
Barszcz, K.
Bartyzel, B.J.
Powiązania:
https://bibliotekanauki.pl/articles/2087311.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lumbar vertebrae
spine
dogs
mathematical model
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 2; 301-308
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 72

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