Stress distribution of different lumbar posterior pedicle screw insertion techniques: a combination study of finite element analysis and biomechanical test
| العنوان: | Stress distribution of different lumbar posterior pedicle screw insertion techniques: a combination study of finite element analysis and biomechanical test |
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| المؤلفون: | Kai Ma, Shouyu Wang, Mingzhi Song, Zhonghai Li, Xiliang Tian, Kebin Sun, Junwei Zong |
| المصدر: | Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021) Scientific Reports |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Models, Anatomic, musculoskeletal diseases, Computer science, Science, medicine.medical_treatment, Finite Element Analysis, 0206 medical engineering, Torque wrench, 02 engineering and technology, Article, Stress (mechanics), Fracture Fixation, Internal, 03 medical and health sciences, Imaging, Three-Dimensional, 0302 clinical medicine, Lumbar, Pedicle Screws, Elastic Modulus, medicine, Humans, Internal fixation, Strain gauge, Stress concentration, Universal testing machine, Lumbar Vertebrae, Multidisciplinary, Reproducibility of Results, 020601 biomedical engineering, Finite element method, Biomechanical Phenomena, Experimental models of disease, Radiography, Medicine, Stress, Mechanical, 030217 neurology & neurosurgery, Biomedical engineering |
| الوصف: | At present, the pedicle screw is the most commonly used internal fixation device. However, there are many kinds of common posterior pedicle screw insertion techniques performed to reconstruct the lumbar stability. Therefore, spinal surgeons often face a difficult choice. The stress distribution of internal fixation system is an important index for evaluating safety. Unfortunately, little had been known about the difference of stress distribution of screw-rod systems that established by Roy-Camille, Magerl and Krag insertion techniques. Here, combination of finite element analysis and model measurement research was adopted to evaluate the difference of stress. Following different pedicle screw insertion techniques, three lumbar posterior surgery models were established after modeling and validation of the L1–S1 vertebrae finite element model. By analyzing the data, we found that stress concentration phenomenon was in all the postoperative models. Roy-Camille and Magerl insertion techniques led to the great stress on screw-rod systems. Then, fresh frozen calf spines were selected as a model for subsequent measurements. Fitted with a specially designed test pedicle screw, L5–L6 vertebrae were selected to repeat and verify the results of the finite element analysis. With the aid of universal testing machine and digital torque wrench, models simulated flexion, extension, lateral bending and rotation. Finally, the strain value was captured by the strain gauge and was then calculated as the stress value. Krag and Magerl were found to be the safer choice for pedicle screw insertion. Overall, our combination method obtained the reliable result that Krag insertion technique was the safer approach for pedicle screw implantation due to its relatively dispersive stress. Therefore, without the consideration of screw size, pedicle fill, bone density, and bone structures, we recommend the Krag insertion technique as the first choice to reconstruction of lumbar stability. Additionally, the combination method of finite element analysis and strain gauge measurement can provide a feasible way to study the stress distribution of spinal internal fixation. |
| تدمد: | 2045-2322 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::105d6cc578ed786a7b108be1682a8432Test https://doi.org/10.1038/s41598-021-90686-6Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....105d6cc578ed786a7b108be1682a8432 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20452322 |
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