A study of height and width of typical lumbar pedicles in relation to mechanical load

Tiwari, Amrish; Pandey, Shilpa; Naik, Deepak C

doi:10.5455/ijmsph.2015.0410201450

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…7). Additionally, there are several reports on pedicle size and screw placement safety 2,22,32) . Thus, considering all of the above, pedicle width seems to be related to breached screws, and it is unlikely that screw fixation level and SD between the tracker and the instrumented level will be considered independent potential risk factors for RAPSF.…”

Section: Discussionmentioning

confidence: 99%

A Single-Center Experience of Robotic-Assisted Spine Surgery in Korea : Analysis of Screw Accuracy, Potential Risk Factor of Screw Malposition and Learning Curve

Oh,

Son,

Lee

et al. 2024

J Korean Neurosurg Soc

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Objective : Recently, robotic-assisted spine surgery (RASS) has been considered a minimally invasive and relatively accurate method. In total, 495 robotic-assisted pedicle screw fixation (RAPSF) procedures were attempted on 100 patients during a 14-month period. The current study aimed to analyze the accuracy, potential risk factors, and learning curve of RAPSF.Methods : This retrospective study evaluated the position of RAPSF using the Gertzbein and Robbins scale (GRS). The accuracy was analyzed using the ratio of the clinically acceptable group (GRS grades A and B), the dissatisfying group (GRS grades C, D, and E), and the Surgical Evaluation Assistant program. The RAPSF was divided into the no-breached group (GRS grade A) and breached group (GRS grades B, C, D, and E), and the potential risk factors of RAPSF were evaluated. The learning curve was analyzed by changes in robot-used time per screw and the occurrence tendency of breached and failed screws according to case accumulation.Results : The clinically acceptable group in RAPSF was 98.12%. In the analysis using the Surgical Evaluation Assistant program, the tip offset was 2.37±1.89 mm, the tail offset was 3.09±1.90 mm, and the angular offset was 3.72°±2.72°. In the analysis of potential risk factors, the difference in screw fixation level (p=0.009) and segmental distance between the tracker and the instrumented level (p=0.001) between the no-breached and breached group were statistically significant, but not for the other factors. The mean difference between the no-breach and breach groups was statistically significant in terms of pedicle width (p<0.001) and tail offset (p=0.042). In the learning curve analysis, the occurrence of breached and failed screws and the robot-used time per screw screws showed a significant decreasing trend.Conclusion : In the current study, RAPSF was highly accurate and the specific potential risk factors were not identified. However, pedicle width was presumed to be related to breached screw. Meanwhile, the robot-used time per screw and the incidence of breached and failed screws decreased with the learning curve.

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Section: Discussionmentioning

confidence: 99%

A Single-Center Experience of Robotic-Assisted Spine Surgery in Korea : Analysis of Screw Accuracy, Potential Risk Factor of Screw Malposition and Learning Curve

Oh,

Son,

Lee

et al. 2024

J Korean Neurosurg Soc

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show abstract

“…4 The fixation of lumbar spine is needed for various problems such as fracture in lumbar spine, resection of tumors in vertebral bodies, lumbar instabilities. 5 Among the interventions for the diseases affecting the lumbar spine, pedicle screw fixation is one of the important and widely used interventions. Pedicles of the vertebra also act as a port to perform procedures inside the bodies of the vertebra such as biopsies, vertebroplasties or kyphoplasties.…”

Section: Introductionmentioning

confidence: 99%

Study of Pedicles in Dried Human Lumbar Vertebra : A Morphometric Analysis

et al. 2022

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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 this study to observe the morphometry of lumbar pedicles to determine the size of the screw in transpedicular screw fixation on the perspective of Bangladesh. Materials and methods: A descriptive observational study was conducted at Southern Medical College and Hospital in the Department of Anatomy on 65 dry adult human lumbar vertebra from December 2020 to May 2021. Width height of pedicle along with antero-posterior diameter of lateral recess (Depth) were observed by using digital Vernier Calipers and after recording data were analysed. Results: The study shows that there is gradual increase in the mean width of the pedicles on both right and left side from L1 to L5. Mean height of the pedicle and antero-posterior diameter of lateral recess both showed decrease at the level of L3 both on the right and left side. Conclusions: The measured data will give a gross measurement of pedicle of lumbar vertebra on Bangladeshi people, hope to provide the clinicians a better support during working with pedicles. IAHS Medical Journal Vol 4(2), December 2021; 51-54

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A study of height and width of typical lumbar pedicles in relation to mechanical load

Cited by 2 publications

References 10 publications

A Single-Center Experience of Robotic-Assisted Spine Surgery in Korea : Analysis of Screw Accuracy, Potential Risk Factor of Screw Malposition and Learning Curve

A Single-Center Experience of Robotic-Assisted Spine Surgery in Korea : Analysis of Screw Accuracy, Potential Risk Factor of Screw Malposition and Learning Curve

Study of Pedicles in Dried Human Lumbar Vertebra : A Morphometric Analysis

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