Estimation of Lumbar Disc Areas by Means of Anthropometric Parameters

Colombini, Daniela; Occhipinti, Enrico; Grieco, A; Faccini, Melissa

doi:10.1097/00007632-198901000-00010

Cited by 24 publications

(7 citation statements)

References 1 publication

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“…A forward tilted sitting position was therefore suggested in order to achieve similar lordosis angles as in standing. A reclined position reduces the load on the intervertebral discs and on the back muscles by an increased lordosis angle, which was shown by Colombini et al [20]. Graf et al [21] demonstrated a certain discomfort with a tilting seat angle of more than 15°.…”

Section: Introductionmentioning

confidence: 94%

The Spinal Curvature of Three Different Sitting Positions Analysed in an Open MRI Scanner

Baumgartner

Zemp

List

et al. 2012

The Scientific World Journal

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Sitting is the most frequently performed posture of everyday life. Biomechanical interactions with office chairs have therefore a long-term effect on our musculoskeletal system and ultimately on our health and wellbeing. This paper highlights the kinematic effect of office chairs on the spinal column and its single segments. Novel chair concepts with multiple degrees of freedom provide enhanced spinal mobility. The angular changes of the spinal column in the sagittal plane in three different sitting positions (forward inclined, reclined, and upright) for six healthy subjects (aged 23 to 45 years) were determined using an open magnetic resonance imaging (MRI) scanner. An MRI-compatible and commercially available office chair was adapted for use in the scanner. The midpoint coordinates of the vertebral bodies, the wedge angles of the intervertebral discs, and the lumbar lordotic angle were analysed. The mean lordotic angles were 16.0 ± 8.5° (mean ± standard deviation) in a forward inclined position, 24.7 ± 8.3° in an upright position, and 28.7 ± 8.1° in a reclined position. All segments from T10-T11 to L5-S1 were involved in movement during positional changes, whereas the range of motion in the lower lumbar segments was increased in comparison to the upper segments.

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Section: Introductionmentioning

confidence: 94%

The Spinal Curvature of Three Different Sitting Positions Analysed in an Open MRI Scanner

Baumgartner

Zemp

List

et al. 2012

The Scientific World Journal

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“…Therefore, it cannot serve as a general criterion for such recognition. On an individual level, a detailed analysis of the individual exposure conditions (including such factors as posture; use of the backrest; amplitude, frequency, and sign of peak accelerations) and their comparison with individual factors (such as the individual strength of the spine [Brinckmann et al, 1989;Colombini et al, 1989; Vesterby et al, 19911) might be a promising future approach. …”

mentioning

confidence: 99%

Selected health risks caused by long‐term, whole‐body vibration

Seidel

1993

American J Industrial Med

137

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The problem of a "vibration disease" caused by low-frequency whole-body vibration (wbv) is critically discussed. Disorders of the nervous, circulatory, and digestive systems are interpreted not to be predominantly wbv-specific, but to be related to the totality of working conditions. Long-term wbv exposure can probably contribute to the pathogenesis of disorders of female reproductive organs (menstrual disturbances, anomalies of position) and disturbances of pregnancy (abortions, stillbirths). Animal experiments suggest harmful effects on the fetus. WBV has a minor synergistic effect on the development of noise-induced hearing loss. Degenerative changes of the spine are more prevalent among wbv-exposed workers. Model calculations demonstrate an increased spinal load in pregnant women exposed to wbv or self-induced vibration, and illustrate a possibility for the comparison of data on stress, strain, and strength. The analysis of individual exposure-effect relationships is suggested as a future approach for evaluating potential occupation-related diseases.

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“…2 The cumulative forces acting in this area create highest transitional forces in the spine. 3,4 In addition, the bone density of sacrum is low which adds to the cumulative factors causing higher rates of non union and instrumentation failure at this segment. 5 Nonetheless the area is explored for various indications to maintain sagittal, coronal balance, stronger construct and to achieve solid fusion.…”

Section: Introductionmentioning

confidence: 99%

Sacropelvic fixation techniques - Current update

Nanda

Manghwani

Kluger

2020

Journal of Clinical Orthopaedics and Trauma

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Sacropelvic is a complex junctional area owing to the complex regional anatomy and higher biomechanical stress. However extension of construct is indicated in cases with complex deformities, high grade spondylolisthesis, and complex fractures. The challenges remain which includes pseudoarthrosis and fixation failures. The fixation techniques have constantly evolved over time with better results with iliac screws and S2-alar-iliac screws. This article gives background on evolution, biomechanics, and recent update of use of robotics for sacropelvic fixation.

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Estimation of Lumbar Disc Areas by Means of Anthropometric Parameters

Cited by 24 publications

References 1 publication

The Spinal Curvature of Three Different Sitting Positions Analysed in an Open MRI Scanner

The Spinal Curvature of Three Different Sitting Positions Analysed in an Open MRI Scanner

Selected health risks caused by long‐term, whole‐body vibration

Sacropelvic fixation techniques - Current update

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