The influence of musculoskeletal forces on the growth of the prenatal cortex in the ilium: a finite element study

Watson, Peter J.; Fagan, Michael J.; Dobson, Catherine

doi:10.1080/10255842.2020.1777546

Cited by 2 publications

(2 citation statements)

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“…Mechanical loading triggered the mechanoregulation of bone to reach mechnostat with optimal structure to react the surrounding mechanical environment. 23 The substantial asymmetry between left and right femurs revealed by Laumonerie's study 24 suggested unbalanced mechanical loads to be transferred to bilateral ilia via the acetabulum and sacroiliac joint. 25 , 26 Moreover, muscles and ligaments surrounding the ilia engage in a gait pattern, which may present asymmetrical features.…”

Section: Discussionmentioning

confidence: 99%

“…As the load‐bearing site, the ilia could have an active mechanobiology‐related bone modeling and remodeling process. Mechanical loading triggered the mechanoregulation of bone to reach mechnostat with optimal structure to react the surrounding mechanical environment 23 . The substantial asymmetry between left and right femurs revealed by Laumonerie's study 24 suggested unbalanced mechanical loads to be transferred to bilateral ilia via the acetabulum and sacroiliac joint 25,26 .…”

Section: Discussionmentioning

confidence: 99%

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Morphological Asymmetry of Pelvic Rings: A Study Based on Three‐Dimensional Deviation Analysis

Zhang

Huang

et al. 2022

Orthopaedic Surgery

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Objective: To evaluate the morphological asymmetry of pelvic rings existing in healthy individuals in terms of threedimensional (3D) geometric shapes.Methods: This study was a retrospective self-control study. CT images of healthy pelvises, scanned from Jan 2014 to Jan 2019, were taken from 159 subjects (88 males and 71 females) aged 20 to 59 years (39.1 AE 8.7 years). Digital pelvic ring models were reconstructed from CT images and then flipped over the corresponding sagittal planes to obtain their mirrored models. A 3D deviation analysis of a pelvic ring was conducted between the original model and its mirrored model via model registration and quantification of the geometric differences. Next, the pelvic rings were split to the left and right hipbones. The same flipping procedures as done by pelvic rings were performed for left hipbones to obtain their mirrored models. A 3D deviation analysis was also performed between the left and right hip bones. Quantitative variables representing deviation mainly included the average deviation (AD) and the maximum deviation (MD). MDs over 4 mm and 10 mm were deemed as critical levels for evaluating the severity of asymmetry as per Matta's scoring system. The quantitative assessments of the asymmetry covered pelvic rings, bilateral hip bones and the specific anatomic regions of a hip bone.Results: 157 out of 159 pelvic rings (98.74%) had more than 4 mm of the MD and 27 (16.98%) of them exceeded 10 mm of the MD. The MD of pelvic rings was 1.23 times as high as that for the bilateral hip bones (7.46 mm vs. 6.08 mm, P < 0.05). The ADs of pelvic rings and bilateral hip bones were 1.28 mm and 0.94 mm, respectively (P < 0.05); 2.27% of the surface points of a pelvic ring had more than 4 mm geometric deviations compared with its mirrored model, while 0.59% (P < 0.05) of bilateral hip bones were on the same level of deviation. 119 out of 159 pelvic iliac crests (74.8%) had MDs more than 4 mm, and 15 (9.4%) reached 10 mm or more. Only 15 (9.4%) pelvises presented asymmetric features in the area of obturator foramen where the MDs exceeded 4 mm.Conclusions: Pelvic asymmetry exists in the general population, but 3D geometric symmetry is present in specific anatomic regions. It implies that restoring the 3D symmetry of specific anatomic regions is more reliable than "restoring the symmetry of pelvic ring" in pelvic ring reduction or pelvic fixation design.

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