Skip to main content

Buckling of Osteoporotic Lumbar: Finite Element Analysis- Crimson Publishers

Buckling of Osteoporotic Lumbar: Finite Element Analysis- Crimson Publishers

Contribution of osteoporotic degradation to instability of lumbar spine is investigated by the finite element method. The aim of this work is to assess the biomechanical response of the osteoporotic L3 vertebrae under axial compression loading. The human lumbar spine segment comprising L2-L4 is considered. The anatomic shape of the patient-specific image-based geometry of lumbar vertebra is used for the three-dimensional finite element model. The cortical skin of vertebra id modelled by the shell, while cancellous tissue by the volume elements. The weak intervertebral discs are modelled as 3D composite. Three models including healthy and two trabecular bone osteoporotic degeneration cases are analyzed. The first case is restricted to osteoporotic degradation cancellous bone tissue as it is used in common praxis while the second case reflects limit situation when trabecular rarefaction occurs near the outer cortical shell. Numerical results of the non-linear finite element analysis showed that osteoporotic degradation is potentially suspicious for instability. The rarefication of cancellous bones yields to local buckling of vertebral wall essentially reducing load-bearing capacity, which has to be considered in such extreme situations. Consequently, the vertebra loses load-bearing capacity even when the strength limit is not reached. 3D finite element models were used. The aim of this work is to assess the biomechanical response, or load transfer response, between osteoporotic L3 vertebrae under compression loading. For this purpose, image-based, heterogeneous, three-dimensional, patient-specific finite element models of the lumbar vertebrae L3 for osteoporotic subjects were created. The finite element analysis has shown that local vertebral damage, such as empty spaces in vertebral bone, give rise to vertebral wall point’s horizontal displacement increase. Consequently, the vertebra loses load-bearing capacity even when the strength limit is not reached.

https://crimsonpublishers.com/rmes/fulltext/RMES.000683.php

For more open access journals in crimson publishers Please click on link: https://crimsonpublishers.com

For more articles on Research in Medical & Engineering Sciences Please click on link: https://crimsonpublishers.com/rmes/

Labels:

Comments

Post a Comment

Popular posts from this blog

The Malachite Wen-Myeloid Sarcoma- Crimson Publishers

The Malachite Wen-Myeloid Sarcoma- Crimson Publishers   Contingent to World Health Organization (WHO) classification, myeloid sarcoma is denominated as a tumefaction comprised of myeloblasts amalgamated at an anatomical site divergent from the bone marrow which engenders distortion of normal tissue architecture. Generally, myeloid sarcoma is contemplated to be equivalent to and concurrent with acute myeloid leukaemia (AML), although lesions may occur in isolation. Additionally designated as granulocytic sarcoma, chloroma or extramedullary myeloid tumour, myeloid sarcoma categorically represents as a distinct tumefaction associated with architectural effacement of circumscribing soft tissue. Myeloid sarcoma may emerge as a de novo lesion or manifest as therapy related myeloid neoplasm or as disease progression within myeloproliferative neoplasm (MPN), myelodysplastic syndrome (MDS) or myelodysplastic / myeloproliferative neoplasm (MDS / MPN). In contrast, leukaemia cutis (LC) is...
Post a Comment
Read more

Recent Developments of Decentralized Clinical Trial Technology in Korea- Crimson Publishers

Recent Developments of Decentralized Clinical Trial Technology in Korea- CrimsonPublishers   Clinical trials are routinely performed on human participants to evaluate the safety and effectiveness of new treatments such as drugs and medical devices. Recent advances in Information and Communication Technology (ICT) have led to the development of Decentralized Clinical Trials (DCTs). DCTs allow participants to participate in various types of clinical trials without having to visit hospitals. Data collection and frequent interactions between participants and medical staff can be possible via remote monitoring environments. In addition, the costs and time for clinical trials conduction can be significantly reduced. The development of ICT-based DCT technologies has already initiated. However, the adoption of DCTs was facilitated by the coronavirus disease 2019 (COVID-19) pandemic. Interest in and research on DCTs has also grown in Korea. This study describes the present state of DCT ...
Post a Comment
Read more

Use of Thymbra Species Spreading in the Flora of Turkey for Medicinal Purposes- Crimson Publishers

Use of Thymbra Species Spreading in the Flora of Turkey for Medicinal Purposes- Crimson Publishers In terms of richness of plant species, Turkey has an important position in the world. It contains about 9,000 plant species and 11,500 taxa. Moreover, more than 1,000 plant species are used as medicinal and aromatic plants in our country. Medicinal plants are mostly evaluated by gathering from nature. Lamiaceae family covers many well-known and economically important medicinal types such as mint, sage, balm, thyme, lavender, basil. These plants, with wide adaptation limits, are well adapted to temperate and tropical regions. Although it is found in the natural flora of almost every region in our country, the Aegean and Mediterranean regions have an important position in terms of endemic species of the family. Although there are many aromatic plant species belonging to the family Lamiaceae described as thyme in Turkey, especially species containing the essential oil carvacrol and thymol ...
Post a Comment
Read more