Coronal Trunk Imbalance in Idiopathic Scoliosis: Does Gravity Line Localisation Confirm the Physical Findings?
Article dans une revue avec comité de lecture
JournalRevue de Chirurgie Orthopédique et Traumatologique
Background: Adolescent idiopathic scoliosis (AIS) can require surgical procedures that have major con-sequences. Coronal imbalance as assessed clinically using a plumb line is a key criterion for selecting patients to surgery. Nevertheless, the reference standard for assessing postural balance of the trunk is gravity line localisation within a validated frame of reference. Recent studies have established that the gravity line can be localised after body contour reconstruction from biplanar radiographs. The objec-tive of this study was to validate a gravity line localisation method based on biplanar radiographs in a population with AIS then to validate gravity line position versus plumb line position. Hypothesis: Plumb line and gravity line assessments of coronal balance correlate with each other. Material and methods: A gravity line localisation method based on biplanar radiography was validated in 14 patients with AIS versus force platform as the method of reference. Normal plumb line and gravity line positions were determined in 27 asymptomatic adolescents using biplanar radiography. The results of the two methods were then compared in 53 patients with AIS. Results: The reliability of gravity line localisation in the coronal plane based on biplanar radiography was 2.4 mm (95% conﬁdence interval). The distance between the gravity line and the middle of the line connecting the centres of the two femoral heads (HA) showed a strongly signiﬁcant association with plumb line position computed as the distance from the vertical line through the middle of T1 and the centre of the S1 endplate (T1V/S): r = 0.71, p < 0.0001. Of the 20 patients with plumb line results indicating coronal imbalance, 11 (55%) had a normal gravity line-to-HA distance. Of the 33 patients with normal plumb line results, 7 (21%) had an abnormal gravity line-to-HA distance. Conclusion: The results of this study validate gravity line determination from biplanar radiographs in a population with AIS. Plumb line position correlated signiﬁcantly with gravity line position but was less accurate for guiding surgical decisions. Level of evidence: IV, retrospective study.
Files in this item
Showing items related by title, author, creator and subject.
Coronal trunk imbalance in idiopathic scoliosis: Does gravity line localisation confirm the physical findings? Article dans une revue avec comité de lectureHERNANDEZ, Thibault; THENARD, Thomas; VERGARI, Claudio; ROBICHON, Leopold; SKALLI, Wafa (Elsevier Masson, 2018)Background: Adolescent idiopathic scoliosis (AIS) can require surgical procedures that have major consequences. Coronal imbalance as assessed clinically using a plumb line is a key criterion for selecting patients to ...
Analysis of Center of Mass and Gravity-Induced Vertebral Axial Torque on the Scoliotic Spine by Barycentremetry Article dans une revue avec comité de lectureTHENARD, Thomas; VERGARI, Claudio; HERNANDEZ, Thibault; VIALLE, Rapahaël; SKALLI, Wafa (Springer Verlag, 2019)STUDY DESIGN: Retrospective observational study. OBJECTIVES: To determine the mass distribution along the scoliotic trunk using barycentremetry and its relationship with vertebral axial rotation and torque. SUMMARY OF THE ...
Article dans une revue avec comité de lectureGAJNY, Laurent; ROBICHON, Léopold; PINTO, Eleonora; HERNANDEZ, Thibault; VIALLE, Raphaël; SKALLI, Wafa (Taylor & Francis, 2020)Adolescent idiopathic scoliosis (AIS) is a 3D deformity of the spine detectable by trunk asymmetry. As a decision-aid tool, a body scanner can help assessing non-invasively the external shape of the trunk. However if AIS ...
Article dans une revue avec comité de lectureVERGARI, Claudio; CHEN, Zhuowei; ROBICHON, Léopold; COURTOIS, Isabelle; EBERMEYER, Eric; VIALLE, Raphaël; LANGLAIS, Tristan; PIETTON, Raphaël; SKALLI, Wafa (Taylor & Francis, 2020)Bracing is the most common treatment to stop the progression of adolescent idiopathic scoliosis. Finite element modeling could help improve brace design, but model validation is still a challenge. In this work, the clinical ...
Biplanar stereoradiography predicts pulmonary function tests in adolescent idiopathic scoliosis: a cross-sectional study Article dans une revue avec comité de lectureBOULOUSSA, Houssam; VERGARI, Claudio; HAEN, Thomas-Xavier; SKALLI, Wafa; VIALLE, Raphaël (Springer Verlag, 2019)Purpose Various spinal and rib cage parameters measured from complex examinations were found to be correlated with preoperative pulmonary function tests (PFT). The aim was to investigate the relationship between preoperative ...