sylwia szotek - Academia.edu (original) (raw)
Papers by sylwia szotek
Acta of Bioengineering and Biomechanics
Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. ... more Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. Therefore, the present study investigated the dura mater's mechanical and basic morphological properties to learn more about the biomechanical behaviour of this fibrous membrane. Methods: Tissue strips, oriented in the longitudinal and circumferential directions, were cut from the cervical, thoracic, and lumbar vertebrae parts of the porcine spinal cord. Uniaxial tensile tests were performed using a device with a speed of 4 mm/min until rupture of the sample. Results: It was demonstrated that the dura mater is a heterogeneous, anisotropic material. The longitudinal excised specimens showed the highest values of mechanical properties (ultimate force (FU), the stiffness coefficient (k), ultimate tensile strength (σUTS), and Young’s modulus (E)) compared to those of the circumferentially. Confocal microscopy and sulforhodamine B (SRB) assay enabled us to visualise collagen and elastin e...
Journal of Raman Spectroscopy, 2010
Journal of Biomechanics, 2006
Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main... more Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main findings include: 1. Blood perfusion has little influence on burn damage distribution, but significant influence on temperature distribution and hence the thermal stress field; 2. Stratum corneum layer should be considered when modelling thermal stress in skin tissues; 3. The mean mechanical threshold of nociceptors in skin is around 0-0.6 MPa and mainly between 0.1-0.2 MPa [1]. Our results show that the thermal stress is usually larger than this threshold, implying that thermal stressing may contribute significantly to the pain.
Acta of Bioengineering and Biomechanics
Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. ... more Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. Therefore, the present study investigated the dura mater's mechanical and basic morphological properties to learn more about the biomechanical behaviour of this fibrous membrane. Methods: Tissue strips, oriented in the longitudinal and circumferential directions, were cut from the cervical, thoracic, and lumbar vertebrae parts of the porcine spinal cord. Uniaxial tensile tests were performed using a device with a speed of 4 mm/min until rupture of the sample. Results: It was demonstrated that the dura mater is a heterogeneous, anisotropic material. The longitudinal excised specimens showed the highest values of mechanical properties (ultimate force (FU), the stiffness coefficient (k), ultimate tensile strength (σUTS), and Young’s modulus (E)) compared to those of the circumferentially. Confocal microscopy and sulforhodamine B (SRB) assay enabled us to visualise collagen and elastin e...
Acta of Bioengineering and Biomechanics, 2011
Skin is an important barrier protecting the organism against external environmental factors. Dete... more Skin is an important barrier protecting the organism against external environmental factors. Determination of its mechanical characteristics as regards its structure has significant scientific and application value. In this work, uniaxial tensile tests were conducted to determine the basic mechanical parameters of skin with respect to its structure. The subject of the study were skin samples taken from domestic pig foetuses. They were excised from different parts of body, in the direction parallel to the long axis of the body. Regardless of the sampling site, the tests revealed no significant differences in the values of the maximum tensile strength (2.08 ± 0.25 MPa) and the conventional Young's modulus (5.87 ± 1.52 MPa). The mechanical and structural tests confirmed that regardless of the sampling region the skin of domestic pig foetuses may constitute a human skin substitute model.
Journal of the Mechanical Behavior of Biomedical Materials, 2013
Fourier Transform Raman Spectroscopy was used to investigate the molecular changes of structural ... more Fourier Transform Raman Spectroscopy was used to investigate the molecular changes of structural proteins in human skin subjected to strain. In the Raman spectrum of unstrained skin, bands assigned mainly to collagen and elastin were observed at 1658 cm(-1) (amide I), 1271 and 1255 cm(-1) (amide III), and 935 and 817 cm(-1) (C-C stretching modes of the protein backbone). Moreover, bands characteristic for amino acids were observed at 1336 cm(-1) (desmosine), 1004 cm(-1) (phenylalanine), 919 and 856 cm(-1) (proline), and 877 cm(-1) (hydroxyproline). Positions and intensities of the listed Raman bands were analysed as a function of applied strain. A clear correlation between Raman wavenumbers and the level of mechanical stress was established. Wavenumbers of the analysed bands changed gradually with increasing strain. Distinct responses, depending on the sample cutting direction, i.e. longitudinal or perpendicular to the Langer's lines, were noticed. It was concluded that elastin and non-helical domains of collagen are initially involved in the load transfer and triple helices of collagen are gradually joining this process. It was proved that Raman spectroscopy give insight into skin deformation micromechanics.
Journal of Biomechanics, 2012
Journal of Biomechanics, 2011
The comparative study was performed to investigate the biomechanical properties (maximum tangenti... more The comparative study was performed to investigate the biomechanical properties (maximum tangential stiffness, maximum tangential modulus and tensile strength) of expanded mucoperiosteal palatal tissue after rapid expansion regimen correlated with histological findings. Rabbit palatal model was used to correlate the non-operated control group, sham-operated control (subperiosteal tissue dissection) groups and 24- and 48-hour tissue expansion groups. There was no observed damage of tissue collagen network in both tissue expansion groups analyzed immediately after expansion, and biomechanical profile was not significantly different from the profile of control groups. However, rapid tissue expansion activates remodeling of mucoperiosteal tissue structure that revealed significant changes in mechanical properties during the 4-week follow-up. The 24-hour expansion induced transient increase of resilience observed 2 weeks after surgery in comparison to the control groups. As a result of maturation of newly created collagen fibers and mucoperiosteum rebuilding, there were no significant differences between any of the analyzed tensile parameters 4 weeks after the 24-hour expansion. Increased and elongated inflammatory response and connective matrix synthesis observed during healing of 48-hour expanded tissue led to a significant decrease of tensile strength value in comparison to the control groups. Even though 4 weeks after surgery, the resilience of 48-hour expanded tissue was similar to the control groups, tissue healing was not completed and limited scar formation might considerably change the final biomechanical tissue profile. These findings provide new information about tensile properties to rapid mucoperiosteal palatal tissue expansion with the use of osmotic expanders for cleft palate repair by tissue augmentation.
Journal of Biomechanics, 2006
Journal of Raman Spectroscopy, 2010
The combination of Fourier transform-Raman spectroscopy and uniaxial tensile tests (in MTS Synerg... more The combination of Fourier transform-Raman spectroscopy and uniaxial tensile tests (in MTS Synergie 100 testing machine) was used to investigate microstructural changes in the secondary protein structure of the aortic wall under different levels of stress. The spectroscopic analysis clearly shows differing tension thresholds for material excised in two directions: circumferential and longitudinal. This is confirmed by the results of macroscopic mechanical analyses. The application of strain does not lead to any noticeable change in the bandwidths of the Raman bands. The stress-controlled Raman band analysis shows that the modes at 938 cm−1 assigned as CαC of the α-helix, 1660 cm−1 amide I (the unordered structure of elastin) and 1668 cm−1 amide I (the collagen triple helix) undergo wavenumber shifting, but the bands at 1004 cm−1 assigned to the phenyl ring breathing mode and 2940 cm−1 to the ν (CH3) and ν (CH2) modes are not affected during the elastic behaviour. A clear correlation...
Journal of Biomechanics, 2006
Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main... more Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main findings include: 1. Blood perfusion has little influence on burn damage distribution, but significant influence on temperature distribution and hence the thermal stress field; 2. Stratum corneum layer should be considered when modelling thermal stress in skin tissues; 3. The mean mechanical threshold of nociceptors in skin is around 0-0.6 MPa and mainly between 0.1-0.2 MPa [1]. Our results show that the thermal stress is usually larger than this threshold, implying that thermal stressing may contribute significantly to the pain.
Acta of bioengineering and biomechanics, 2018
Young school-age children are particularly prone to postural defects because they are in a period... more Young school-age children are particularly prone to postural defects because they are in a period of development of the spine that is exposed to a number of factors impairing its normal growth. A change in the shape of the spinal column causes a shift in the centre of gravity. Therefore, this study attempted to assess the influence of body posture on distribution of the load transferred by the lower limbs. METHODS For each of the examined children, this study determined the parameters describing the body posture with the use of the photogrammetric method and the parameters describing plantar force distribution. The statistical analyses were performed using the U Mann- Whitney test and the student's t-test. The correlations between the parameters of the body posture and the parameters describing the foot load distribution were analysed using the Pearson correlation coefficient. These analyses were performed at a statistically significant level of p < 0.05. RESULTS The tests co...
Acta of Bioengineering and Biomechanics, 2012
Among the currently used methods of monitoring human tissues and their components many types of r... more Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.
The fascial system is an integral part of the musculoskeletal system. It is a three-dimensional n... more The fascial system is an integral part of the musculoskeletal system. It is a three-dimensional network of connective tissue spreading ubiquitously throughout the body, surrounding muscles, bones, internal organs, nerves, vessels, and other structures. The basic biophysical properties of the fascial system are determined by its structure and chemical composition. This study aimed to determine the elemental composition of pathologically unchanged fascia lata of the thigh, collected during autopsies on humans and dogs. The wide spectrum of elements analysed included both macro and micro elements. The analyses were conducted using scanning electron microscopy with X-ray microanalysis (SEM-EDS). Concentrations of the following macro and micro
Neurologia i neurochirurgia polska, 2007
BACKGROUND AND PURPOSE Conventional neurosurgical procedures give surgeons both tactile and visua... more BACKGROUND AND PURPOSE Conventional neurosurgical procedures give surgeons both tactile and visual feedback. Unlike conventional procedures, minimally invasive surgery is devoid of haptic feedback. Incorporation of tactile feedback into neurosurgical robotic systems can greatly enhance the results of minimally invasive procedures. Hence, the ultimate goal of the research presented here is to define the force response of the brain to different types of mechanical stimuli (short- and long-term). The experimental results describe the force responses of brain during indentation tests. MATERIAL AND METHODS Seven ovine head specimens with exposed brain were fixed to an MTS Synergie 100 testing machine using a rigid clamp--metallic frame with sharp-end screws. Four regions were loaded by a hemispherically-ended cylindrical indentor. Each of the indentations applied to the brain was divided into two general stages: insertion and hold which was constant for 180 s. Measurements for the follow...
Deep fascia is formed by a connective membrane that sheaths all muscles. It is devoid of fat, for... more Deep fascia is formed by a connective membrane that sheaths all muscles. It is devoid of fat, forms sheaths for the nerves and vessels, becomes specialized around the joints to form or strengthen ligaments, envelops various organs [1]. The fascia lata is the deep fascia of the thigh. It is often used as a graft material in a variety of orthopaedic procedures. Autologous nature of this graft eliminates the risk of graft-versus-host reactions [2]. Knowledge of the normal structure and function, chemical content of fascia will help towards a clearer understanding of the pathological changes which can occur [3]. Till now, to the authors’ best knowledge, neither elemental composition nor biomechanical properties of canine fascia lata were subject to detailed analysis. Therefore in this study both facial elemental content and mechanical behaviour were examined.
![Research paper thumbnail of [The evaluation of the properties of the silicone-rod and tissue reation after 5,5 years period of implantation]](https://attachments.academia-assets.com/75715985/thumbnails/1.jpg)
](Polimery w medycynie, 2007
In this study we presented a case of prolonged detention of the temporary flexor tendon prosthesi... more In this study we presented a case of prolonged detention of the temporary flexor tendon prosthesis after implantation in the hand. The silicone-rod removed after more than 5 years was subject to an examination: scanning microscopy, measurement of hardness, scanning differential calorimetry, spectroscopy in infra-red and resistance examinations. The obtained results were compared with a findings after examinations of the new, not used silicone-rod. The greatest changes were observed in maximum value of tensile strength (sigmaB) of the material after test of uniaxial tensile tests, which was about 30% smaller for a silicone-rod after implantation. The other result of investigations didn't reveal an important differences between a new and a used rod. The comparison of the tissue reaction was performed by collection a part of sheath in described case and a part of sheath produced around a rod after 10 weeks period of implantation. The generation of a capsules consisted of fibrous co...
Among the currently used methods of monitoring human tissues and their components many types of r... more Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required, the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work, vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.
Acta of Bioengineering and Biomechanics
Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. ... more Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. Therefore, the present study investigated the dura mater's mechanical and basic morphological properties to learn more about the biomechanical behaviour of this fibrous membrane. Methods: Tissue strips, oriented in the longitudinal and circumferential directions, were cut from the cervical, thoracic, and lumbar vertebrae parts of the porcine spinal cord. Uniaxial tensile tests were performed using a device with a speed of 4 mm/min until rupture of the sample. Results: It was demonstrated that the dura mater is a heterogeneous, anisotropic material. The longitudinal excised specimens showed the highest values of mechanical properties (ultimate force (FU), the stiffness coefficient (k), ultimate tensile strength (σUTS), and Young’s modulus (E)) compared to those of the circumferentially. Confocal microscopy and sulforhodamine B (SRB) assay enabled us to visualise collagen and elastin e...
Journal of Raman Spectroscopy, 2010
Journal of Biomechanics, 2006
Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main... more Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main findings include: 1. Blood perfusion has little influence on burn damage distribution, but significant influence on temperature distribution and hence the thermal stress field; 2. Stratum corneum layer should be considered when modelling thermal stress in skin tissues; 3. The mean mechanical threshold of nociceptors in skin is around 0-0.6 MPa and mainly between 0.1-0.2 MPa [1]. Our results show that the thermal stress is usually larger than this threshold, implying that thermal stressing may contribute significantly to the pain.
Acta of Bioengineering and Biomechanics
Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. ... more Purpose: Spinal dura mater plays a crucial role in the biomechanics and protection of the spine. Therefore, the present study investigated the dura mater's mechanical and basic morphological properties to learn more about the biomechanical behaviour of this fibrous membrane. Methods: Tissue strips, oriented in the longitudinal and circumferential directions, were cut from the cervical, thoracic, and lumbar vertebrae parts of the porcine spinal cord. Uniaxial tensile tests were performed using a device with a speed of 4 mm/min until rupture of the sample. Results: It was demonstrated that the dura mater is a heterogeneous, anisotropic material. The longitudinal excised specimens showed the highest values of mechanical properties (ultimate force (FU), the stiffness coefficient (k), ultimate tensile strength (σUTS), and Young’s modulus (E)) compared to those of the circumferentially. Confocal microscopy and sulforhodamine B (SRB) assay enabled us to visualise collagen and elastin e...
Acta of Bioengineering and Biomechanics, 2011
Skin is an important barrier protecting the organism against external environmental factors. Dete... more Skin is an important barrier protecting the organism against external environmental factors. Determination of its mechanical characteristics as regards its structure has significant scientific and application value. In this work, uniaxial tensile tests were conducted to determine the basic mechanical parameters of skin with respect to its structure. The subject of the study were skin samples taken from domestic pig foetuses. They were excised from different parts of body, in the direction parallel to the long axis of the body. Regardless of the sampling site, the tests revealed no significant differences in the values of the maximum tensile strength (2.08 ± 0.25 MPa) and the conventional Young's modulus (5.87 ± 1.52 MPa). The mechanical and structural tests confirmed that regardless of the sampling region the skin of domestic pig foetuses may constitute a human skin substitute model.
Journal of the Mechanical Behavior of Biomedical Materials, 2013
Fourier Transform Raman Spectroscopy was used to investigate the molecular changes of structural ... more Fourier Transform Raman Spectroscopy was used to investigate the molecular changes of structural proteins in human skin subjected to strain. In the Raman spectrum of unstrained skin, bands assigned mainly to collagen and elastin were observed at 1658 cm(-1) (amide I), 1271 and 1255 cm(-1) (amide III), and 935 and 817 cm(-1) (C-C stretching modes of the protein backbone). Moreover, bands characteristic for amino acids were observed at 1336 cm(-1) (desmosine), 1004 cm(-1) (phenylalanine), 919 and 856 cm(-1) (proline), and 877 cm(-1) (hydroxyproline). Positions and intensities of the listed Raman bands were analysed as a function of applied strain. A clear correlation between Raman wavenumbers and the level of mechanical stress was established. Wavenumbers of the analysed bands changed gradually with increasing strain. Distinct responses, depending on the sample cutting direction, i.e. longitudinal or perpendicular to the Langer&amp;#39;s lines, were noticed. It was concluded that elastin and non-helical domains of collagen are initially involved in the load transfer and triple helices of collagen are gradually joining this process. It was proved that Raman spectroscopy give insight into skin deformation micromechanics.
Journal of Biomechanics, 2012
Journal of Biomechanics, 2011
The comparative study was performed to investigate the biomechanical properties (maximum tangenti... more The comparative study was performed to investigate the biomechanical properties (maximum tangential stiffness, maximum tangential modulus and tensile strength) of expanded mucoperiosteal palatal tissue after rapid expansion regimen correlated with histological findings. Rabbit palatal model was used to correlate the non-operated control group, sham-operated control (subperiosteal tissue dissection) groups and 24- and 48-hour tissue expansion groups. There was no observed damage of tissue collagen network in both tissue expansion groups analyzed immediately after expansion, and biomechanical profile was not significantly different from the profile of control groups. However, rapid tissue expansion activates remodeling of mucoperiosteal tissue structure that revealed significant changes in mechanical properties during the 4-week follow-up. The 24-hour expansion induced transient increase of resilience observed 2 weeks after surgery in comparison to the control groups. As a result of maturation of newly created collagen fibers and mucoperiosteum rebuilding, there were no significant differences between any of the analyzed tensile parameters 4 weeks after the 24-hour expansion. Increased and elongated inflammatory response and connective matrix synthesis observed during healing of 48-hour expanded tissue led to a significant decrease of tensile strength value in comparison to the control groups. Even though 4 weeks after surgery, the resilience of 48-hour expanded tissue was similar to the control groups, tissue healing was not completed and limited scar formation might considerably change the final biomechanical tissue profile. These findings provide new information about tensile properties to rapid mucoperiosteal palatal tissue expansion with the use of osmotic expanders for cleft palate repair by tissue augmentation.
Journal of Biomechanics, 2006
Journal of Raman Spectroscopy, 2010
The combination of Fourier transform-Raman spectroscopy and uniaxial tensile tests (in MTS Synerg... more The combination of Fourier transform-Raman spectroscopy and uniaxial tensile tests (in MTS Synergie 100 testing machine) was used to investigate microstructural changes in the secondary protein structure of the aortic wall under different levels of stress. The spectroscopic analysis clearly shows differing tension thresholds for material excised in two directions: circumferential and longitudinal. This is confirmed by the results of macroscopic mechanical analyses. The application of strain does not lead to any noticeable change in the bandwidths of the Raman bands. The stress-controlled Raman band analysis shows that the modes at 938 cm−1 assigned as CαC of the α-helix, 1660 cm−1 amide I (the unordered structure of elastin) and 1668 cm−1 amide I (the collagen triple helix) undergo wavenumber shifting, but the bands at 1004 cm−1 assigned to the phenyl ring breathing mode and 2940 cm−1 to the ν (CH3) and ν (CH2) modes are not affected during the elastic behaviour. A clear correlation...
Journal of Biomechanics, 2006
Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main... more Track 20. Biomechanics of Organs perature, burn damage and thermal stress distributions. The main findings include: 1. Blood perfusion has little influence on burn damage distribution, but significant influence on temperature distribution and hence the thermal stress field; 2. Stratum corneum layer should be considered when modelling thermal stress in skin tissues; 3. The mean mechanical threshold of nociceptors in skin is around 0-0.6 MPa and mainly between 0.1-0.2 MPa [1]. Our results show that the thermal stress is usually larger than this threshold, implying that thermal stressing may contribute significantly to the pain.
Acta of bioengineering and biomechanics, 2018
Young school-age children are particularly prone to postural defects because they are in a period... more Young school-age children are particularly prone to postural defects because they are in a period of development of the spine that is exposed to a number of factors impairing its normal growth. A change in the shape of the spinal column causes a shift in the centre of gravity. Therefore, this study attempted to assess the influence of body posture on distribution of the load transferred by the lower limbs. METHODS For each of the examined children, this study determined the parameters describing the body posture with the use of the photogrammetric method and the parameters describing plantar force distribution. The statistical analyses were performed using the U Mann- Whitney test and the student's t-test. The correlations between the parameters of the body posture and the parameters describing the foot load distribution were analysed using the Pearson correlation coefficient. These analyses were performed at a statistically significant level of p < 0.05. RESULTS The tests co...
Acta of Bioengineering and Biomechanics, 2012
Among the currently used methods of monitoring human tissues and their components many types of r... more Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.
The fascial system is an integral part of the musculoskeletal system. It is a three-dimensional n... more The fascial system is an integral part of the musculoskeletal system. It is a three-dimensional network of connective tissue spreading ubiquitously throughout the body, surrounding muscles, bones, internal organs, nerves, vessels, and other structures. The basic biophysical properties of the fascial system are determined by its structure and chemical composition. This study aimed to determine the elemental composition of pathologically unchanged fascia lata of the thigh, collected during autopsies on humans and dogs. The wide spectrum of elements analysed included both macro and micro elements. The analyses were conducted using scanning electron microscopy with X-ray microanalysis (SEM-EDS). Concentrations of the following macro and micro
Neurologia i neurochirurgia polska, 2007
BACKGROUND AND PURPOSE Conventional neurosurgical procedures give surgeons both tactile and visua... more BACKGROUND AND PURPOSE Conventional neurosurgical procedures give surgeons both tactile and visual feedback. Unlike conventional procedures, minimally invasive surgery is devoid of haptic feedback. Incorporation of tactile feedback into neurosurgical robotic systems can greatly enhance the results of minimally invasive procedures. Hence, the ultimate goal of the research presented here is to define the force response of the brain to different types of mechanical stimuli (short- and long-term). The experimental results describe the force responses of brain during indentation tests. MATERIAL AND METHODS Seven ovine head specimens with exposed brain were fixed to an MTS Synergie 100 testing machine using a rigid clamp--metallic frame with sharp-end screws. Four regions were loaded by a hemispherically-ended cylindrical indentor. Each of the indentations applied to the brain was divided into two general stages: insertion and hold which was constant for 180 s. Measurements for the follow...
Deep fascia is formed by a connective membrane that sheaths all muscles. It is devoid of fat, for... more Deep fascia is formed by a connective membrane that sheaths all muscles. It is devoid of fat, forms sheaths for the nerves and vessels, becomes specialized around the joints to form or strengthen ligaments, envelops various organs [1]. The fascia lata is the deep fascia of the thigh. It is often used as a graft material in a variety of orthopaedic procedures. Autologous nature of this graft eliminates the risk of graft-versus-host reactions [2]. Knowledge of the normal structure and function, chemical content of fascia will help towards a clearer understanding of the pathological changes which can occur [3]. Till now, to the authors’ best knowledge, neither elemental composition nor biomechanical properties of canine fascia lata were subject to detailed analysis. Therefore in this study both facial elemental content and mechanical behaviour were examined.
Polimery w medycynie, 2007
In this study we presented a case of prolonged detention of the temporary flexor tendon prosthesi... more In this study we presented a case of prolonged detention of the temporary flexor tendon prosthesis after implantation in the hand. The silicone-rod removed after more than 5 years was subject to an examination: scanning microscopy, measurement of hardness, scanning differential calorimetry, spectroscopy in infra-red and resistance examinations. The obtained results were compared with a findings after examinations of the new, not used silicone-rod. The greatest changes were observed in maximum value of tensile strength (sigmaB) of the material after test of uniaxial tensile tests, which was about 30% smaller for a silicone-rod after implantation. The other result of investigations didn't reveal an important differences between a new and a used rod. The comparison of the tissue reaction was performed by collection a part of sheath in described case and a part of sheath produced around a rod after 10 weeks period of implantation. The generation of a capsules consisted of fibrous co...
Among the currently used methods of monitoring human tissues and their components many types of r... more Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required, the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work, vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.