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Journal articles on the topic 'Lumbar pedicles'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Londhe, Balu Gangaram, Rajendra Somnath Garud, and Ganesh Bhausaheb Khemnar. "Morphometric Assessment of Pedicles of Indian Adult Lumbar Vertebrae: A Cross Sectional Study." International Journal of Anatomy and Research 10, no. 4 (2022): 8523–27. http://dx.doi.org/10.16965/ijar.2022.254.

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Introduction: Lumbar vertebral column is exposed to various kinds of stress during locomotion. In erect posture weight transmitted through posterior part including pedicles. This causes deformities of this region as the age advances in many individuals. Proper correction of deformity is challenging. There have been advances in spinal fusion procedures and interspinous implantation of devices including pedicle screws. Use of unsuitable dimensions of screw may cause problem of destruction of pedicle. Correct metricular data of pedicle is necessary for choice of appropriate screw size. Aims and O

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Makino, Takahiro, Takashi Kaito, Hiroyasu Fujiwara, and Kazuo Yonenobu. "Morphometric analysis using multiplanar reconstructed CT of the lumbar pedicle in patients with degenerative lumbar scoliosis characterized by a Cobb angle of 30° or greater." Journal of Neurosurgery: Spine 17, no. 3 (2012): 256–62. http://dx.doi.org/10.3171/2012.6.spine12227.

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Object Although the anatomy of the thoracic pedicle in adolescent idiopathic scoliosis is well known, that of the lumbar pedicle in degenerative lumbar scoliosis is not. The morphometric differences between the pedicles on the concave and convex sides can result in an increased risk of malpositioned pedicle screws. The purpose of this study was to analyze the lumbar pedicle morphology in degenerative lumbar scoliosis using multiplanar reconstructed CT. Methods The study group comprised 16 consecutive patients (1 man and 15 women, mean age 70.9 ± 4.5 years) with degenerative lumbar scoliosis ch

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Owori, Francis Riwo, John Patrick Abingwa, Nyati Mallon, Oitangor Arthur, and Erias Sabakaki Mwaka. "Pattern of Pedicle Morphometry of Lumbar Vertebrae among Adult Ugandans Using Computed Tomography Scan Imaging." International Journal of Scientific Development and Research 9, no. 3 (2024): 893–99. https://doi.org/10.5281/zenodo.10890376.

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Background  The number of patients with degenerative diseases and other causes of the lumbar spine diseases is increasing. Some of these patients are being managed operatively by spine instrumentation using pedicle screw systems. Pedicle morphometric studies are relevant for proper placement of transpedicular screws to avoid penetration of the pedicle walls. This study aimed at determining the morphometry of pedicles in the lumbar spine among adult Ugandans attending Mulago National Referral Hospital assessed using Computerized Tomography (CT) scans.    Methods Across-sectional

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Khatiwada, Sushma, Buddhi Nath Adhikari Sudhin, Neeraj Pandey, Iju Shrestha, and Deepesh Dhungel. "MORPHOMETRIC STUDY OF LUMBAR VERTEBRAL PEDICLES." Journal of Chitwan Medical College 11, no. 1 (2021): 46–51. http://dx.doi.org/10.54530/jcmc.315.

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Background: Pedicle screw instrumentation has revolutionized spine surgery on account of its superiority over other stabilization systems. It is safe when properly placed and versatile for a range of procedure from fracture fixation to complex deformity correction. Sound anatomical knowledge of the pedicle may also be helpful during surgical approach to lumbar foramina disc herniation and epidural steroid injection as well as in the diagnosis of some lumbar degenerative diseases and chronic back pain. In this study we aimed to provide locoregional data on lumbar pedicle morphometry of Nepales

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Khair, Rummana, Zohora Farhana Rahman, Ishrat Jahan, and Sultana Ruma Alam. "Study of Pedicles in Dried Human Lumbar Vertebra : A Morphometric Analysis." IAHS Medical Journal 4, no. 2 (2022): 51–54. http://dx.doi.org/10.3329/iahsmj.v4i2.62526.

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Background: In the dynamic part of the spinal column the lumbar vertebra are the largest vertebra that support the maximum body weight and exhibit the greatest degree of degenerative changes. Pedicles of the vertebra act as a port to perform procedures inside the bodies of the vertebra such as biopsies, vertebroplasties or kyphoplasties. Pedicle screw fixation is a technically demanding procedure. Accurate anatomical knowledge of the morphometry of vertebral pedicle are also important for preoperative procedure, planning and in the design and manufacture of pedicle screws. The objective of thi

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G., S. Mali Patil, K.G. Prakash, Jain Anjali, and Sharma Kalpana. "Determination of Variation in Dimensions of Lumbar Vertebral Pedicles among Indian Adult Population." International Journal of Pharmaceutical and Clinical Research 15, no. 1 (2023): 615–22. https://doi.org/10.5281/zenodo.13138202.

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<strong>Introduction:</strong> An operating surgeon can carry out these treatments more accurately and safely if they are aware of slight anatomical heterogeneity. Prior to implant implantation, general orthopedic surgery guidelines encourage templating with precise measurements. It is known that there is a significant discrepancy between both the historically recorded diameter of the outer cortical and the effective cancellous diameter, suggesting that a safe screw selection might not always be possible with the use of traditional methods. It is strongly believed by the surgeon community

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Yilmaz, Murat, Beyza Alkis, and Kemal Yucesoy. "The Effect of the Lumbar Pedicle and Pediculo-Corporal Junction Histology on the Pedicle Screw Insertion Technique." Open Access Macedonian Journal of Medical Sciences 8, B (2020): 177–80. http://dx.doi.org/10.3889/oamjms.2020.3324.

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Background Posterior lumbar pedicle screw instrumentation has gained a wide acceptance in the treatment of the various spinal lesions requiring fusion. Inserting screws into the pedicles take a great deal of skill, as the dense bony parts are not large, and a mistake could push a bone fragment into the spinal nerves, causing pain, loss of mobility and other damage. Aim: To investigate the histological and gross-anatomical properties of the pediculocorporal junction, which can have important clinical implications on the insertion technique of the pedicle screws. Study Design:

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Hsieh, Chang-Sheng, Sang-Ho Lee, Hyung Chang Lee, et al. "Congenital hypoplasia of the lumbar pedicle with spondylolisthesis: report of 2 cases." Journal of Neurosurgery: Spine 26, no. 4 (2017): 430–34. http://dx.doi.org/10.3171/2016.8.spine151137.

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Congenital hypoplasia of the spinal pedicle is a rare condition. Previously reported cases were treated conservatively or with posterior instrumented fusion. However, the absence or hypoplasia of the lumbar pedicle may increase the difficulty of pedicle screw fixation and fusion. Herein, the authors describe 2 cases of rare adult congenital hypoplasia of the right lumbar pedicles associated with spondylolisthesis. The patients underwent anterior lumbar interbody fusion with a stand-alone cage as well as percutaneous pedicle screw fixation. This method was used to avoid the difficulties associa

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Safia, Wasi, and Prasad Rashmi. "Determining the Various Dimensions of Lumbar Vertebral Pedicles in Adults and its Clinical in Various Surgical Procedures: Morphometric Assessment." International Journal of Current Pharmaceutical Review and Research 16, no. 03 (2024): 563–67. https://doi.org/10.5281/zenodo.12792720.

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AbstractAim: The aim of the present study was to measure the various dimensions in Indian adult human lumbar vertebralpedicles and to prepare data of lumbar pedicles useful in various surgical procedures.Methods: The study was implemented on 45 dry, fully ossified normal lumbar vertebral sets from the Departmentof Anatomy, Nalanda Medical College, Patna, Bihar, India from Jan 2023 to November 2023. For study purpose,all vertebrae were categorized into typical (L1 to L4) and atypical (L5). Exclusion of deformed vertebrae wasdone.Results: In present study, the mean length and height of pedicles

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Sigdel, Arun. "A Prospective Observational Study on Lumbar Spinal Canal Diameter, Vertebral Body Width and Pedicle Width and Height Measured in Plain X-Rays of Lumbar Spine in Normal Nepalese Adults." Civil Medical Journal 1, no. 1 (2023): 1–5. http://dx.doi.org/10.59338/cmj.1.

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Introduction: Determining the lumbar spinal canal diameter and the horizontal and vertical diameter of lumbar pedicles by using plain x-ray in different age groups, sex and ethnic groups in adult Nepalese population will simplify the transpedicular procedures in our country and can aid in making early diagnosis in persons who have lower diameters of lumbar spinal canal. Methods: The present study was conducted on 195 adult lumbar spine X-rays in the Department of Orthopedics of Civil Service Hospital. antero-posterior and lateral radiographs of lumbar spine were taken and the measurements were

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Öğün, Tunç Cevat, Mehmet Erkan Üstün, and Mustafa Büyükmumcu. "CEPHALOCAUDAL VARIATIONS IN THE HORIZONTAL AND VERTICAL DIAMETERS OF THE PEDICLES OF THE LUMBAR SPINE IN THE TURKISH POPULATION." Journal of Musculoskeletal Research 05, no. 01 (2001): 61–64. http://dx.doi.org/10.1142/s0218957701000416.

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Purpose: Racial morphometric differences in the pedicular structure of the vertebrae must be taken into account when using international transpedicular screw systems. In this study, we tried to figure out the differences, if any, in the size of the pedicles in a sample of the Turkish population. Methods: The horizontal and vertical diameters of the pedicles of the lumbar vertebrae were measured from the standardized anteroposterior radiographs of the lumbar spine in 100 subjects, aged from 20 to 40 years. Results: The mean horizontal width of the pedicles in our sample of the Turkish populatio

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Cheema, Omer Iqbal, Muhammad Tajammal Butt, Tayyab Shoaib, et al. "Transpedicular Screw Fixation of the Lumbar Spine: an anatomical perspective." Pakistan Journal of Medical and Health Sciences 16, no. 2 (2022): 231–34. http://dx.doi.org/10.53350/pjmhs22162231.

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Background Transpedicular screw fixation of the lumbar spine is a popular procedure to attain stability in degenerative conditions, deformity and fracture. An inappropriate size and positioning of the screw however may result in postoperative neurological and vascular complications in up to 42% of cases emphasizing need for precise morphometric data. Aim: This study aimed at providing morphometric features of lumbar vertebral pedicles germane to transpedicular screw fixation in Punjab. Study design: Cross-sectional population study Methods: Lumbar spine measurements of height and transverse di

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Maillot, C., and R. Wolfram-Gabel. "Pedicles of lumbar vertebrae." Surgical and Radiologic Anatomy 15, no. 4 (1993): 295–300. http://dx.doi.org/10.1007/bf01627881.

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Isik, Cengiz, Kamil Cagri Kose, Mustafa Erkan Inanmaz, Suleyman Murat Tagil, and Hakan Sarman. "The Mechanisms of Medial Pedicle Wall Violation: Insertion Method Is as Important as Correct Cannulation of the Pedicle." Advances in Orthopedics 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/283783.

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A cadaver study aims to determine the mechanisms of medial pedicle wall violation after a correct cannulation of the pedicle. The study presents finding out the effect of insertion angle and insertion force on medial wall violation. We used 100 lumbar pedicles of cadavers. Special wooden blocks were produced to simulate a fixed angle fault after a correct pedicle cannulation. Pedicles were divided into 4 groups: 10-degree free drive (group 10), 15-degree free drive (group 15), 10-degree push drive (group 10P), and 15-degree push drive (group 15P). After insertion of pedicle screws, laminectomi

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Serkan, İnceoğlu, Cumhur Kılınçer, Andrea Tami, and Robert F. McLain. "Cortex of the pedicle of the vertebral arch. Part I: deformation characteristics during screw insertion." Journal of Neurosurgery: Spine 7, no. 3 (2007): 341–46. http://dx.doi.org/10.3171/spi-07/09/341.

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Object Elastic deformation has been proposed as a mechanism by which vertebral pedicles can maintain pullout strength when conical screws are backed out from full insertion. The response to the insertion technique may influence both the extent of deformation and the risk of acute fracture during screw placement. The aim of this study was to determine the deformation characteristics of the lumbar pedicle cortex during screw placement. Methods Lumbar pedicles with linear strain gauges attached at the lateral and medial cortices were instrumented using 7.5-mm pedicle screws with or without precon

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Hwang, ChangJu, JooYoung Lee, DongHo Lee, et al. "Novel Screw Placement Method for Extremely Small Lumbar Pedicles in Scoliosis." Journal of Clinical Medicine 13, no. 4 (2024): 1115. http://dx.doi.org/10.3390/jcm13041115.

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Consecutive case series. Objective: To propose a screw placement method in patients with extremely small lumbar pedicles (ESLPs) (<2 mm) to maintain screw density and correction power, without relying on the O-arm navigation system. Summary of Background Data: In scoliosis surgery, ESLPs can hinder probe passage, resulting in exclusion or substitution of the pedicle screws with a hook. Screw density affects correction power, making it necessary to maximize the number of screw placements, especially in the lumbar curve. Limited studies provide technical guidelines for screw placement in pati

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Holly, Langston T., and Kevin T. Foley. "Three-dimensional fluoroscopy-guided percutaneous thoracolumbar pedicle screw placement." Journal of Neurosurgery: Spine 99, no. 3 (2003): 324–29. http://dx.doi.org/10.3171/spi.2003.99.3.0324.

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✓ The authors sought to evaluate the feasibility and accuracy of three-dimensional (3D) fluoroscopic guidance for percutaneous placement of thoracic and lumbar pedicle screws in three cadaveric specimens. After attaching a percutaneous dynamic reference array to the surgical anatomy, an isocentric C-arm fluoroscope was used to obtain images of the region of interest. Light-emitting diodes attached to the C-arm unit were tracked using an electrooptical camera. The image data set was transferred to the image-guided workstation, which performed an automated registration. Using the workstation dis

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Abbas, Janan, Natan Peled, Israel Hershkovitz, and Kamal Hamoud. "Pedicle Morphometry Variations in Individuals with Degenerative Lumbar Spinal Stenosis." BioMed Research International 2020 (February 24, 2020): 1–6. http://dx.doi.org/10.1155/2020/7125914.

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The aim of this study was to compare pedicle dimensions in degenerative lumbar spinal stenosis (DLSS) with those in the general population. A retrospective computerized tomography (CT) study for lumbar vertebrae (L1 to L5) from two sample populations was used. The first included 165 participants with symptomatic DLSS (age range: 40-88 years, sex ratio: 80 M/85 F), and the second had 180 individuals from the general population (age range: 40-99 years, sex ratio: 90 M/90 F). Both males and females in the stenosis group manifested significantly greater pedicle width than the control group at all

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Kiapour, Ali, D. Greg Anderson, David B. Spenciner, Lisa Ferrara, and Vijay K. Goel. "Kinematic effects of a pedicle-lengthening osteotomy for the treatment of lumbar spinal stenosis." Journal of Neurosurgery: Spine 17, no. 4 (2012): 314–20. http://dx.doi.org/10.3171/2012.6.spine11518.

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Object Lumbar spinal stenosis (LSS) may lead to disabling neurogenic symptoms and has traditionally been treated using open laminectomy. A new technique for correcting LSS involves lengthening the lumbar pedicles through bilateral percutaneous pedicle osteotomies. In this paper, the authors' goal was to evaluate the changes in spinal canal dimensions and kinematic behavior after pedicle-lengthening osteotomies. Methods The kinematic behavior of 8 cadaveric lumbar segments was evaluated intact and after bilateral pedicle-lengthening osteotomies at the L-4, L-5, and L-4 and L-5 levels. Testing w

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Marasini, Rudra Prasad, Pratiksha Gautam, Binod Sherchan, Ganesh Gurung, and Bachchu Ram K.C. "A Morphometric Study of Lumbar Spine Pedicles in Nepalese Population." Journal of College of Medical Sciences-Nepal 10, no. 4 (2015): 12–17. http://dx.doi.org/10.3126/jcmsn.v10i4.12972.

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Background and Objective: In this observational study, morphometric data were obtained and analyzed by taking plain x-rays in various age groups to establish the morphometric values in Nepalese population.Methods: All the pedicle dimensions were measured by taking plain x-ray AP (Antero-posterior) and Lateral view of the lumbar spine in 246 Nepalese of different age groups. Pedicle diameters (Vertical and Horizontal) and interpedicular distance were measured in AP radiographs and sagittal angle was measured in the lateral radiographs. Differences between mean dimensions of pedicles of male and

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Kosulin, A. V., D. V. Elyakin, D. O. Korchagina, N. A. Lukina, Yu I. Shibutova, and E. S. Kolesnikova. "Transpedicular fixation of the spine with two-level navigation templates for narrow pedicles." Hirurgiâ pozvonočnika (Spine Surgery) 18, no. 2 (2021): 26–33. http://dx.doi.org/10.14531/ss2021.2.26-33.

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Objective. To assess the correctness of transpedicular screw insertion in thoracic and lumbar vertebrae using two-level navigation templates for narrow pedicles.Material and Methods. Two-level navigation templates were used in surgical treatment of four patients aged 14–17 years with scoliotic deformity and multiple pedicles of small width (less than 4.35 mm). In each patient, the least favorable zones were selected for implantation using navigation templates. The rest of planned pedicle screws were inserted using free-hand technique. All patients underwent CT scanning postoperatively. Screws

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Goh, Tae Sik, Sung-Chan Shin, Hyun-Keun Kwon, et al. "Application of a Novel Attachable Magnetic Nerve Stimulating Probe in Intraoperative Lumbar Pedicle Screw Placement: A Porcine Model Study." Applied Sciences 11, no. 17 (2021): 7801. http://dx.doi.org/10.3390/app11177801.

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Pedicle screw instrumentation is a fundamental technique in lumbar spine surgery. However, several complications could occur when placing a pedicle screw, the most serious being damage to the neural structures. We developed an attachable magnetic nerve stimulating probe used for triggered electromyography (t-EMG) to avoid these. This study aimed to investigate the efficacy of this probe for intraoperative neuromonitoring (ION) during lumbar pedicle screw placement in a porcine model. Forty pedicle screws were inserted bilaterally into the pedicles of the fourth and fifth lumbar vertebrae of fi

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Afrin, Luisa, Md Shahjahan Chowdhury, and Nadia Nawshin. "Radiological Evaluation of Horizontal and Vertical Diameters of the Pedicle of Lumbar Vertebrae in Adult Bangladeshi People of Different Body Weight." Journal of Rangpur Medical College 10, no. 1 (2025): 16–21. https://doi.org/10.3329/jrpmc.v10i1.81516.

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Background: Accurate knowledge of anatomy of spine with clear understanding of pedicle morphology and measurement of pedicle dimensions is crucial for treatment with pedicle screw instrumentation and that can minimize the risks of complications. Objective: The present study was carried out to find out the effect of different body weight on pedicle of lumbar vertebrae radiologically in both sexes of adult Bangladeshi people. Methods: This cross-sectional analytical study was conducted at the Department of Anatomy of Rangpur Medical College, Rangpur from a period of July 2018 to June 2019. One t

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Mahato, Niladri Kumar. "Disc spaces, vertebral dimensions, and angle values at the lumbar region: a radioanatomical perspective in spines with L5–S1 transitions." Journal of Neurosurgery: Spine 15, no. 4 (2011): 371–79. http://dx.doi.org/10.3171/2011.6.spine11113.

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Object Low-back pain (LBP) has been associated with lumbar spines of normal morphology as well as those with L5–S1 “transitional” vertebrae. It is hard to find literature that quantifies the overall morphological changes in lumbar spines as related to transitional states. The object of this study was to investigate lumbar spine changes resulting from the presence of these transitional states. Methods The author quantified dimensions and angles and statistically compared the morphology of lumbar spines with or without L5–S1 transitions in the context of LBP. Anteroposterior and lateral radiogra

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Kwak, Dai-Soon, Ho-Jung Cho, Ho Chang, Moon Park, In-Sung Kim, and Jae-Hyuk Shin. "Fixation Strength of Pedicle and Cortical Lumbar Vertebral Screws after Laminectomy: A Cadaver Study." Journal of Neurological Surgery Part A: Central European Neurosurgery 79, no. 04 (2018): 273–78. http://dx.doi.org/10.1055/s-0038-1639333.

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Background and Study Aim Cortical screws were proposed as an alternative to the traditional pedicle screws. Diverse experimental results support the biomechanical superiority of cortical screws compared to pedicle screws. Laminectomy is often part of multilevel lumbar surgeries. Laminectomy might weaken the medial bony edge at the entry of the divergently oriented screw and, thereby, the screw purchase. This study investigated the biomechanical strength of lumbar cortical screw after laminectomy. Objective To compare the fixation strength of cortical screws and traditional pedicle screws after

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Zarzur, Edmundo. "The shape of the human lumbar vertebral canal." Arquivos de Neuro-Psiquiatria 54, no. 3 (1996): 451–54. http://dx.doi.org/10.1590/s0004-282x1996000300014.

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Literature on the anatomy of the human vertebral column characterizes the shape of the lumbar vertebral canal as triangular. The purpose of the present study was to determine the precise shape of the lumbar vertebral canal. Ten lumbar vertebral columns of adult male cadavers were dissected. Two transverse sections were performed in the third lumbar vertebra. One section was performed at the level of the lower border of the ligamenta flava, and the other section was performed at the level of the pedicles. The shape of the lumbar vertebral canal at the level of the pedicles tends to be oval or c

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Estrada, Jorge Alberto De Haro, Javier Ramos Fernandez, Juan Carlos Alvarez Garnier, Michael Dittmar Johnson, and Francisco Cruz Lopez. "Bilateral fracture of L5 pedicles in a patient with total disc replacement of L5-S1: a case report." Coluna/Columna 13, no. 2 (2014): 153–55. http://dx.doi.org/10.1590/s1808-18512014130200456.

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Report of a rare complication - fracture of the pedicles - in a patient with total disc replacement of L5-S1, a surgical resolution, and a biomechanical explanation. To the authors' knowledge, there is only one previous report of bilateral fracture of the pedicles in the literature, as a complication in total disc replacement of the lumbar spine. In this case, no direct repair was made to the fracture site; instead intersomatic fusion was performed by the anterior approach. A 40-year-old male, a martial arts practitioner who had undergone L5-S1 (ProDisc(r)) disc replacement nine months earlier

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Irie, Tomoyo Y., Tohru Irie, Alejandro A. Espinoza Orías, et al. "Micro-computed tomography analysis of the lumbar pedicle wall." PLOS ONE 16, no. 7 (2021): e0253019. http://dx.doi.org/10.1371/journal.pone.0253019.

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Background Although the pedicle is routinely used as a surgical fixation site, the pedicle wall bone area fraction (bone area per unit area) and its distribution at the isthmus of the pedicle remain unknown. The bone area fraction at the pedicle isthmus is an important factor contributing to the strength of pedicle screw constructs. This study investigates the lumbar pedicle wall microstructure based on micro-computed tomography. Methods Six fresh-frozen cadaveric lumbar spines were analyzed. Left and right pedicles of each vertebra from L1 to L5 were resected for micro-computed tomography sca

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Chawla, Kunal, Mahesh Sharma, Avinash Abhaya, Ratesh Kumar, and Jyotsna Singh. "Importance of microstructure of lumbar pedicle in screw placement." National Journal of Clinical Anatomy 01, no. 02 (2012): 086–90. http://dx.doi.org/10.1055/s-0039-3401665.

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Abstract Background and objective : Any structural deviation of the pedicle may result in interference of the weight transmission mechanism and compression of neural structures. The aim of this study was to qualitatively investigate osteonal structures within the cortical bone and thickness of medial and lateral walls of lumbar pedicle. Materials and methods : Specimens consisted of L3 vertebrae from 20 adult cadavers (14 males and 6 females) belonging to North West Indian population. The pedicles of each specimen were cut off at the pedicle-vertebral body junction and processed for paraffin s

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Hohn, Eric A., Bryant Chu, Audrey Martin, et al. "The Pedicles Are Not the Densest Regions of the Lumbar Vertebrae: Implications for Bone Quality Assessment and Surgical Treatment Strategy." Global Spine Journal 7, no. 6 (2017): 567–71. http://dx.doi.org/10.1177/2192568217694141.

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Study Design: Cadaver study. Objective: To determine the bone density of lumbar vertebral anatomic subregions. Bone mineral density (BMD) is a major factor in osseous fixation construct strength. The standard region for implant fixation of the spine is the pedicle; however, other regions may be more viable options with higher bone quality. Methods: Using computed tomography images, the spine was digitally isolated by applying a filter for adult bone. The spine model was separated into 5 lumbar vertebrae, followed by segmentation of each vertebra into 7 regions and determination of average Houn

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Mohamed, Elfadil M. Garelnabi, Tafor Ahmed Albosairi, Abdelgauom Fathelrahman Samia, Moshabab Alqhtani Ashwag, and Hudayban Althaiban Saleh. "Study of pedicles and spinal canal diameters at the level of lumbar vertebral in normal adult Saudi population using computed tomography." GSC Advanced Research and Reviews 9, no. 3 (2021): 048–55. https://doi.org/10.5281/zenodo.5813273.

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The values of normal transverse (interpedicular) and sagittal (midsagittal) diameters are different at various levels of lumbar spinal canal in individuals of the same race and differ at identical levels in individuals of various races. The aim of the study was to determine normal reference range of the lumbar spinal canal dimensions and to evaluate lumbar pedicle dimensions with respect to spinal level, age, gender in Saudi population by using Computed Tomography.  This study was conducted in Najran province (K.S.A), archival abdominal CT scan images from PACS in hospitals were used. The

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Grabala, Pawel, Ilkka J. Helenius, Piotr Kowalski, et al. "The Child’s Age and the Size of the Curvature Do Not Affect the Accuracy of Screw Placement with the Free-Hand Technique in Spinal Deformities in Children and Adolescents." Journal of Clinical Medicine 12, no. 12 (2023): 3954. http://dx.doi.org/10.3390/jcm12123954.

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Background: The current method of treatment of spinal deformities would be almost impossible without pedicle screws (PS) placement. There are only a few studies evaluating the safety of PS placement and possible complications in children during growth. The present study was carried out to evaluate the safety and accuracy of PS placement in children with spinal deformities at any age using postoperative computed tomography (CT) scans. Methods: 318 patients (34 males and 284 females) who underwent 6358 PS fixations for pediatric spinal deformities were enrolled in this multi-center study. The pa

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Mendel, Ehud, Narendra Nathoo, Thomas Scharschmidt, Carl Schmidt, James Boehmler, and Joel L. Mayerson. "Creation of false pedicles and a neo-pelvis for lumbopelvic reconstruction following en bloc resection of an iliosacral chondrosarcoma with lumbar spine extension." Journal of Neurosurgery: Spine 20, no. 3 (2014): 327–34. http://dx.doi.org/10.3171/2013.11.spine13211.

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En bloc resection with negative tumor margins remains the principal treatment option for control or cure of primary pelvic chondrosarcomas, as current adjuvant therapies remain ineffective. Iliosacral chondrosarcomas with involvement of the sciatic notch are sufficiently challenging tumors. However, when there is concomitant lumbar extension requiring resection of the pedicles to maintain negative surgical margins, transpedicular screw fixation is not possible, making reconstruction of the lumbopelvic junction extremely challenging. A patient with an iliosacral chondrosarcoma with lumbar spine

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Rodriguez, Analiz, Matthew T. Neal, Ann Liu, Aravind Somasundaram, Wesley Hsu, and Charles L. Branch. "Novel placement of cortical bone trajectory screws in previously instrumented pedicles for adjacent-segment lumbar disease using CT image-guided navigation." Neurosurgical Focus 36, no. 3 (2014): E9. http://dx.doi.org/10.3171/2014.1.focus13521.

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Object Symptomatic adjacent-segment lumbar disease (ASLD) after lumbar fusion often requires subsequent surgical intervention. The authors report utilizing cortical bone trajectory (CBT) pedicle screw fixation with intraoperative CT (O-arm) image-guided navigation to stabilize spinal levels in patients with symptomatic ASLD. This unique technique results in the placement of 2 screws in the same pedicle (1 traditional pedicle trajectory and 1 CBT) and obviates the need to remove preexisting instrumentation. Methods The records of 5 consecutive patients who underwent lumbar spinal fusion with CB

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Cheung, K. M. C., D. Ruan, F. L. Chan, and D. Fang. "Computed Tomographic Osteometry of Asian Lumbar Pedicles." Spine 19, no. 13 (1994): 1495–98. http://dx.doi.org/10.1097/00007632-199407000-00014.

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Karim, Aftab, Debi Mukherjee, Jorge Gonzalez-Cruz, Alan Ogden, Donald Smith, and Anil Nanda. "Accuracy of Pedicle Screw Placement for Lumbar Fusion using Anatomic Landmarks versus Open Laminectomy: A Comparison of Two Surgical Techniques in Cadaveric Specimens." Operative Neurosurgery 59, suppl_1 (2006): ONS—13—ONS—19. http://dx.doi.org/10.1227/01.neu.0000219942.12160.5c.

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Abstract OBJECTIVE: We determined whether the accuracy of lumbar pedicle screw placement is optimized by performing a laminectomy before screw placement with screw entry point and trajectory being guided by pedicle visualization and palpation (Technique 1). This technique was compared with a technique using anatomic landmarks for pedicle screw placement (Technique 2). The biomechanical stability of the instrumented constructs, in the absence and presence of a laminectomy, was also compared. METHODS: Twelve L1–L3 specimens were harvested from fresh cadavers. The intact laminectomy and instrumen

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Kahraman, Sinan, Meriç Enercan, Özkan Demirhan, Türker Şengül, Levent Dalar, and Azmi Hamzaoğlu. "Pneumomediastinum, Subcutaneous Emphysema, and Tracheal Tear in the Early Postoperative Period of Spinal Surgery in a Paraplegic Achondroplastic Dwarf." Case Reports in Orthopedics 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/987578.

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Achondroplasia was first described in 1878 and is the most common form of human skeletal dysplasia. Spinal manifestations include thoracolumbar kyphosis, foramen magnum, and spinal stenosis. Progressive kyphosis can result in spinal cord compression and paraplegia due to the reduced size of spinal canal. The deficits are typically progressive, presenting as an insidious onset of paresthesia, followed by the inability to walk and then by urinary incontinence. Paraplegia can be the result of direct pressure on the cord by bone or the injury to the anterior spinal vessels by a protruding bone. Su

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Johnson, Jeremiah N., and Michael Y. Wang. "Stress fracture of the lumbar pedicle bilaterally: surgical repair using a percutaneous minimally invasive technique." Journal of Neurosurgery: Spine 11, no. 6 (2009): 724–28. http://dx.doi.org/10.3171/2009.7.spine08373.

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Bilateral pedicle fractures in the spine are uncommon in the absence of bony abnormality, previous surgery, or trauma. The authors report a case of spontaneous bilateral lumbar pedicle fracture in a 50-year-old sedentary woman, which caused intractable pain and did not respond to months of conservative management. The fractures were surgically treated using a percutaneous, minimally invasive technique with screws placed directly through the fractures into the vertebral body. The pedicles were strategically tapped to achieve the lag effect and reapproximate the posterior fragment with the anter

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Mohamed Elfadil M. Garelnabi, Albosairi Tafor Ahmed, Samia Abdelgauom Fathelrahman, Ashwag Moshabab Alqhtani, and Saleh Hudayban Althaiban. "Study of pedicles and spinal canal diameters at the level of lumbar vertebral in normal adult Saudi population using computed tomography." GSC Advanced Research and Reviews 9, no. 3 (2021): 048–55. http://dx.doi.org/10.30574/gscarr.2021.9.3.0291.

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The values of normal transverse (interpedicular) and sagittal (midsagittal) diameters are different at various levels of lumbar spinal canal in individuals of the same race and differ at identical levels in individuals of various races. The aim of the study was to determine normal reference range of the lumbar spinal canal dimensions and to evaluate lumbar pedicle dimensions with respect to spinal level, age, gender in Saudi population by using Computed Tomography. This study was conducted in Najran province (K.S.A), archival abdominal CT scan images from PACS in hospitals were used. The data

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El Zahlawy, Hany, Abdelrady M. Abdelrady, and Mohamed Z. Ibrahim. "Unilateral partial pediculectomy combined with contralateral instrumented fusion in treatment of osteoid osteoma localized in lumbar spine pedicles." Egyptian Orthopaedic Journal 56, no. 1 (2021): 56–60. http://dx.doi.org/10.4103/eoj.eoj_83_21.

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Background Treatment of osteoid osteoma of the spine may be challenging when located in the pedicles. Patients and methods Twelve patients with osteoid osteoma located in lumbar spine pedicles were treated via partial pediculectomy to excise the nidus completely combined with contralateral instrumented fusion to prevent instability. Their demographic data, back pain as measured by visual analog scale, and radiographs were recorded and analyzed. The patients were followed up for a period of at least 12 months. Results Their mean age was 18.1 years. Nine were males and three females. The mean pr

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Odeh, Khalid, Alexander Rosinski, Jeremi Leasure, and Dimitriy Kondrashov. "Pedicle Screws Challenged: Lumbar Cortical Density and Thickness Are Greater in the Posterior Elements Than in the Pedicles." Global Spine Journal 11, no. 1 (2019): 34–43. http://dx.doi.org/10.1177/2192568219889361.

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Study Design: Controlled laboratory study. Objective: To measure the total bone mineral density (BMD), cortical volume, and cortical thickness in seven different anatomical regions of the lumbar spine. Methods: Using computed tomography (CT) images, 3 cadaveric spines were digitally isolated by applying filters for cortical and cancellous bone. Each spine model was separated into 5 lumbar vertebrae, followed by segmentation of each vertebra into 7 anatomical regions of interest using 3-dimensional software modeling. The average Hounsfield units (HU) was determined for each region and converted

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Welch, William C., Robert D. Rose, Jeffrey R. Balzer, and George B. Jacobs. "Evaluation with evoked and spontaneous electromyography during lumbar instrumentation: a prospective study." Journal of Neurosurgery 87, no. 3 (1997): 397–402. http://dx.doi.org/10.3171/jns.1997.87.3.0397.

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✓ The neuroanatomical structures that approximate the bony pedicles of the lumbar spine allow little room for technical error or compromise of the bone during pedicle screw insertion. Currently available neurophysiological monitoring techniques detect compromised bone and nerve root injury after it occurs. The purpose of this prospective study is to evaluate the reliability and efficacy of a unique neurophysiological monitoring technique. This technique provides immediate evaluation of pedicle cortical bone integrity in patients undergoing lumbar fusion with instrumentation by using electrifie

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Zhao, Xin, Jie Zhao, Youzhuan Xie, and Jie Mi. "The Utility of a Digital Virtual Template for Junior Surgeons in Pedicle Screw Placement in the Lumbar Spine." BioMed Research International 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/3076025.

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This study assessed the utility of three-dimensional preoperative image reconstruction as digital virtual templating for junior surgeons in placing a pedicle screw (PS) in the lumbar spine. Twenty-three patients of lumbar disease were operated on with bilateral PS fixation in our hospital. The two sides of lumbar pedicles were randomly divided into “hand-free group” (HFG) and “digital virtual template group” (DVTG) in each patient. Two junior surgeons preoperatively randomly divided into these two groups finished the placement of PSs. The accuracy of PS and the procedure time of PS insertion w

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Mansur, Dil Islam, Subindra Karki, Dilip Kumar Mehta, Pragya Shrestha, and Sunima Maskey. "A morphometric analysis of pedicles of lumbar vertebrae by using computed tomography scan." Journal of Kathmandu Medical College 9, no. 1 (2020): 49–55. http://dx.doi.org/10.3126/jkmc.v9i1.33547.

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Background: The vertebral column is the central pillar of the body which has cervical, thoracic, lumbar, sacral and coccygeal parts. Out of these, the lumbar part is made up of five lumbar vertebrae which lies between the thoracic part above and the sacral part below.  Objective: The study aimed to measure pedicle dimensions of lumbar vertebrae by using computed tomography scan. Methodology: This is a descriptive cross-sectional study which was conducted on 115 images of computed tomography scan collected from the Department of Radio-Diagnosis, Dhulikhel Hospital between May and Oc

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Seema, Verma P, and Singh M. "MORPHOMETRIC STUDY OF PEDICLES OF THE LUMBAR VERTEBRAE IN ADULT PUNJABI MALES." International Journal of Anatomy and Research 4, no. 2 (2016): 2401–4. http://dx.doi.org/10.16965/ijar.2016.209.

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Atlas, Scott W., Eric L. Bressler, Peter E. Weinberg, and Lee F. Rogers. "Roentgenographic Evaluation of Thinning of the Lumbar Pedicles." Spine 18, no. 9 (1993): 1190–92. http://dx.doi.org/10.1097/00007632-199307000-00011.

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Castro-Reyes, C., R. Morales-Avalos, F. Vílchez-Cavazos, et al. "Morphometric characteristics of lumbar vertebral pedicles in Mexican population. Implications for transpedicular lumbar fusion surgery." Journal of Morphological Sciences 32, no. 01 (2015): 037–42. http://dx.doi.org/10.4322/jms.072014.

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Abstract Introduction. Spinal fusion surgery using transpedicular fixation is the most common technique for surgical treatment of spinal pathologies of any etiology. The morphometric characteristics of the vertebral pedicle determine the size and shape of pedicle implants. The objective of this study is to determine the morphometric characteristics of the lumbar vertebral pedicle in Mexican population by direct measurement of bone parts. Materials and Methods. We analyzed 65 L1-L5 cadaver lumbar spines from a collection of bone specimens from the Department of Human Anatomy. Pedicle width, hei

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Mullin, Jeffrey P., Breanna Perlmutter, Eric Schmidt, Edward Benzel, and Michael P. Steinmetz. "Radiographic feasibility study of cortical bone trajectory and traditional pedicle screw dual trajectories." Journal of Neurosurgery: Spine 25, no. 6 (2016): 727–32. http://dx.doi.org/10.3171/2016.4.spine151483.

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OBJECTIVE In 2009, Santoni and colleagues described a novel technique of posterior instrumentation; the cortical bone trajectory (CBT) was described as a caudocephalad and medial-to-lateral trajectory. Reported indications for CBT fixation include patients with osteoporosis, single-level degenerative disease, or adjacent-segment disease (ASD). In cases of revision surgery, it is technically possible and beneficial to place a traditional pedicle screw and a CBT screw at the same spinal level and side. It remains unclear as to the feasibility of placing both a traditional and a CBT screw at all

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Mohanty, S. P., M. Pai Kanhangad, S. N. Bhat, and S. Chawla. "Morphometry of the lower thoracic and lumbar pedicles and its relevance in pedicle fixation." MUSCULOSKELETAL SURGERY 102, no. 3 (2018): 299–305. http://dx.doi.org/10.1007/s12306-018-0534-z.

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Burgoyne, L. L., F. Laningham, J. T. Zero, G. B. Bikhazi, and L. A. Pereiras. "Unsuccessful Lumbar Puncture in a Paediatric Patient with Achondroplasia." Anaesthesia and Intensive Care 35, no. 5 (2007): 780–83. http://dx.doi.org/10.1177/0310057x0703500521.

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We present a case of an unsuccessful lumbar puncture performed on an anaesthetised 17-year-old girl with achondroplasia who was diagnosed with and being treated for acute lymphoblastic leukaemia. Magnetic resonance imaging (MRI) subsequently showed spinal stenosis and no observable cerebrospinal fluid around the nerve roots at the levels of the lumbar pedicles and discs. A recommendation is made to obtain MRI scans before proceeding with lumbar puncture and/or spinal anaesthesia in this patient group to ensure that the anatomical features of the insertion site are favourable to a successful ou

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