Classification of pelvic and spinal postural patterns in upright position. Specific cases of scoliotic patients

Berthonnaud, Éric; Dimnet, J.; Hilmi, R.

doi:10.1016/j.compmedimag.2009.06.004

Cited by 16 publications

(16 citation statements)

References 16 publications

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“…The aim of this work was to study the Lenke 1A thoracic idiopathic scoliosis in 3D using the specific software Optispine® [15] in order to determine if all Lenke 1A curves are similar in 3D analysis.…”

Section: Discussionmentioning

confidence: 99%

“…In asymptomatic subjects, the spinal column is made of three regional planes and three junction points [15]: plane 1 for lumbar level, plane 2 for dorsal level, and plane 3 for cervical level. The results of our study show that in scoliotic patients, plane 3 includes dorsal vertebrae from T4, T5, or T6 in 40% of cases, whereas it includes other dorsal levels in 60% of cases.…”

Section: Discussionmentioning

confidence: 99%

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Three-dimensional reconstructions of Lenke 1A curves

et al. 2018

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BackgroundScoliosis is a 3D deformity that can be reconstructed through 2D antero-posterior and lateral radiographs, which provide an upper view of the deformed spine as well as regional planes matching all vertebrae of elective plane for each curve. The objective of this study is to explore whether all idiopathic scoliosis classified Lenke 1A have the same 3D representation made with regional planes.MethodsAll patients treated for idiopathic thoracic scoliosis during the growth period and classified Lenke 1A were included in this study conducted in the pediatric spinal orthopedic department of Centre des Massues. A photogrammetric technique was used to obtain a 3D reconstruction, from regional planes identified on radiographs made with the EOS system. Three regional planes are usually identified in asymptomatic spines: lumbar, dorsal, and cervical—none of them presenting rotation. In the studied group, the number of planes, the rotation, and the limit vertebrae of each plane were looked for.ResultsSixty-three patients were included (47 girls and 16 boys, mean age 11.3 years). The Cobb angle was meanly 36.5°. The scoliosis was reconstructed with three regional planes (57%) or four ones (43%, with the thoracic plane divided into two planes). Maximal rotation was found in the thoracic plane, especially when scoliosis was represented with four regional planes. The transition between planes 2 and 3 was mainly located between the fourth and sixth dorsal vertebrae.ConclusionThe use of an arbitrary regional plane representation of a 3D shape leads to conclude that there are two types of Lenke 1A scoliosis, which should be taken into account for designing the brace.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Three-dimensional reconstructions of Lenke 1A curves

et al. 2018

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“…The patient stands motionless upon the plateau. Patient and plateau are rotated for successive frontal and sagittal radiographic images [14]. On frontal and sagittal projections median spinal curves are drawn.…”

Section: Introductionmentioning

confidence: 99%

“…Stagnara et al [16] demonstrated that scoliotic spines show highest curvatures when shot under specific radiographic incidences. A plane of maximum curvatures of scoliotic spines has been determined from points of spinal curve [14]. This technique was based on the determination of one plane located so that linear distances between 3D spinal curve and plane would be minimum.…”

Section: Introductionmentioning

confidence: 99%

Geometric Structure of 3D Spinal Curves: Plane Regions and Connecting Zones

Berthonnaud

Hilmi

Dimnet³

2012

ISRN Orthopedics

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This paper presents a new study of the geometric structure of 3D spinal curves. The spine is considered as an heterogeneous beam, compound of vertebrae and intervertebral discs. The spine is modeled as a deformable wire along which vertebrae are beads rotating about the wire. 3D spinal curves are compound of plane regions connected together by zones of transition. The 3D spinal curve is uniquely flexed along the plane regions. The angular offsets between adjacent regions are concentrated at level of the middle zones of transition, so illustrating the heterogeneity of the spinal geometric structure. The plane regions along the 3D spinal curve must satisfy two criteria: (i) a criterion of minimum distance between the curve and the regional plane and (ii) a criterion controlling that the curve is continuously plane at the level of the region. The geometric structure of each 3D spinal curve is characterized by the sizes and orientations of regional planes, by the parameters representing flexed regions and by the sizes and functions of zones of transition. Spinal curves of asymptomatic subjects show three plane regions corresponding to spinal curvatures: lumbar, thoracic and cervical curvatures. In some scoliotic spines, four plane regions may be detected.

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“…Some studies highlight the fact that posture and equilibrium problems can be associated with rheumatology and orthopedic diseases such as back pain, neck tension and ankle instability [3]. Postural deviation is a state of imbalance that leads to functional overload, degeneration and dysfunction [1] and can be studied using photography, magnetic resonance imaging and x-ray [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Experimental tests for foot pressure analysis during orthostatic position and gait

et al. 2017

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Abstract. Human body postural deviation during normal activities such as gait or orthostatic position can cause injuries. The paper presents an experimental study regarding the distribution of contact pressures during gait and orthostatic position, aiming to evaluate the load distribution between forefoot (FF) and rear-foot (RF), the projection of center of gravity and the support area variation while conducting stability metering and feet load distribution tests.

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Classification of pelvic and spinal postural patterns in upright position. Specific cases of scoliotic patients

Cited by 16 publications

References 16 publications

Three-dimensional reconstructions of Lenke 1A curves

Three-dimensional reconstructions of Lenke 1A curves

Geometric Structure of 3D Spinal Curves: Plane Regions and Connecting Zones

Experimental tests for foot pressure analysis during orthostatic position and gait

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