Morphometric Study of the Pedicles of Thoracic and Lumbar Vertebrae in Koreans

Kim, Namhyun; Lee, Hwan Mo; Chung, In‐Hyuk; Kim, Hojeong; Kim, Sang-Jin

doi:10.1097/00007632-199406000-00014

Cited by 102 publications

(73 citation statements)

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“…This result reinforced the belief that it is worthwhile to conduct a morphometric study in strength tests. In accordance with other authors [3,10,11,13,16,20,21,25], our morphometric study defined classically three distinct regions: upper (from T1 to T2), middle (from T3 to T9) and lower (from T10 to T12). Nevertheless, the measurement analyses showed differences among all the studies.…”

Section: Discussionsupporting

confidence: 87%

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

Balabaud

Gallard

Skalli

et al. 2003

European Spine Journal

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IntroductionDuring the last 40 years, surgical correction techniques applied to spinal deformity have progressed radically. Harrington [8], Luque [14], and then Cotrel and Dubousset [6] added successive contributions to these advances using different approaches. Harrington [8] chose a simple distraction, correcting deformation essentially in the frontal plane. Luque [14] obtained this same distraction by translating the spine toward the rods, which were fixed by laminar wires. Cotrel and Dubousset [6] introduced a threedimensional correction and fixation system using open hooks and rods. During the last few years, developments Abstract Disadvantages of thoracic posterior implants and developments in rod contouring in situ led to the design of a new spinal implant: the bipedicular spinal fixation device (BSF). The BSF is composed of two bifid hooks linked by a compression transverse connector and inserted into the costo-vertebral and costotransverse joints. The aim of this biomechanical study was to determine the loading tolerance of the BSF. Three strength tests -a pull-out test, a lateral load-to-failure test and a uniaxial transversal compression test to failure -were performed using six human thoracic spines on an Instron testing device. Specimen evaluation consisted of: bone mineral density (BMD) measurement with the dual-energy X-ray absorptiometry (DEXA) technique, cortical thickness measurements and a morphometric study. The mean values for load-to-failure in the posterior and lateral tests were 324 N and 400 N respectively. The mean value of the uniaxial compression was 988 N. The mean BMD estimated by DEXA was 0.557 g/cm 2 . The BSF loading tolerance was compatible with the in situ rod contouring technique requirements when we considered posterior and lateral pull-out tests. The transversal compression test determined the appropriate and efficient BSF tightening force.

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Section: Discussionsupporting

confidence: 87%

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

Balabaud

Gallard

Skalli

et al. 2003

European Spine Journal

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“…In two previous studies of 51 cases in western populations and 40 cases in China, TPD was reported to be higher in men [7,11]. Another study identified differences according to sex only at L3 and L5 levels [8]. A study assessing 49 cases with 3D-CT in the Pakistani population found that males had higher values than females at all lumbar levels [2].…”

Section: Tpdmentioning

confidence: 95%

Morphometric analysis of the lumbar vertebrae in the Turkish population using three-dimensional computed tomography: correlation with sex, age, and height

et al. 2017

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“…The aim of this study was to assess the pedicle anatomy in a Chinese population based on CT scans. Previous studies had shown significant interracial differences of thoracic pedicle morphometry [2,4,10]. Therefore, a complete morphometry database of the thoracic pedicle is needed to determine the safety margin of transpedicular fixation in our population.…”

Section: Introductionmentioning

confidence: 99%

Computed tomographic morphometry of thoracic pedicles: safety pedicle parameter measurement of the Chinese immature thoracic spine

Chen

Huang

et al. 2008

International Orthopaedics (SICOT)

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Our objective was to quantify the morphometric characteristics of the pedicles of the Chinese immature thoracic spine. A total of 120 patients aged 5-14 years underwent standard thoracic computed tomography (CT). The patients were grouped according to age: group 1 (5-8 years of age), group 2 (9-11 years of age) and group 3 (12-14 years of age). Images were reformatted, and multiplanar reconstructions were used to attain images of thoracic pedicles on sagittal, coronal and transverse planes. The measurements included the inner and outer pedicle diameters on the transverse plane, pedicle sagittal diameter, pedicle length and the pedicle angle on the transverse. (1) Pedicle diameters on the transverse plane decreased gradually from T1 to T4 and increased gradually from T5 to T12. The shortest transverse diameter of the thoracic pedicle was T4 or T5. (2) The sagittal diameter was significantly larger than the transverse diameter except at T1. (3) The length of the pedicle from the posterior cortex to the anterior cortex of the vertebra increased from T1 to T12. (4) The pedicle angle decreased gradually from T1 to T8 and became negative below the level of T10. The length of the pedicle changed with age significantly, but the pedicle angle changed with age insignificantly. The success of transpedicular fixation requires a better understanding of morphological features at different ages and reasonable selection of the diameter, length and direction of the pedicle screws based on X-ray and CT films.

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Morphometric Study of the Pedicles of Thoracic and Lumbar Vertebrae in Koreans

Cited by 102 publications

References 0 publications

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

Morphometric analysis of the lumbar vertebrae in the Turkish population using three-dimensional computed tomography: correlation with sex, age, and height

Computed tomographic morphometry of thoracic pedicles: safety pedicle parameter measurement of the Chinese immature thoracic spine

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