Changes in quantitative elastography assessment of the adjacent lumbar disc after segmental fixation of the spine: a case description of a burst fracture of L4
Article dans une revue avec comité de lecture
Vertebral burst fractures are usually due to traumatic high-energy distraction of the vertebra. They often require pedicle screw fixation to stabilize the spine during the healing process but once the fusion of the fractured vertebra has occurred, the posterior fixation can be removed or shortened to restore part of the spinal mobility. The importance of sparing fusion levels to ensure optimal functional results has been demonstrated. In surgical planning, the rule is therefore to ensure the osteosynthesis stability while limiting the number of levels included. Immobilization or fixation of a vertebral segment may be responsible for degeneration of the intervertebral disc and in case of surgical treatment the adjacent disc. Therefore, we can ask whether removal of a vertebral fixation could decrease the stress on adjacent segments. Ultrasound shearwave elastography is a new innovative and non-invasive technique allowing evaluation of soft tissue’s elastic modulus through the measurement of shear wave speed (SWS). This non-invasive imaging method has shown its added value in breast or in liver oncology and, more recently, in musculoskeletal pathologies assessment. In particular, Langlais et al. found that SWS measured in annulus fibrosus was significantly higher in progressive adolescent idiopathic scoliosis than in asymptomatic population, which is associated with a stiffer tissue. The same authors defined a corridor of normality (2.3–3.7 m/s) for the asymptomatic population and observed that annulus SWS tended to normalize 1 year after fusion surgery in severe adolescent idiopathic scoliosis. The aim of this case was to analyze the effect of removing the posterior fixation in a case of burst fracture on the mechanical properties of the bridged and adjacent intervertebral discs.
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Balance, barycentremetry and external shape analysis in idiopathic scoliosis: What can the physician expect from it? Article dans une revue avec comité de lectureLANGLAIS, Tristan; VERGARI, Claudio; ROUGEREAU, Grégoire; GAJNY, Laurent; ASSI, Ayman; GHANEM, Ismat; DUBOUSSET, Jean; VIALLE, Raphaël; PIETTON, Raphaël; SKALLI, Wafa (Elsevier BV, 2021)Objective: Our objective was to establish a corridor of normality for the external shape 3D parameters and then to assess these variables in adolescent idiopathic scoliosis (AIS). Methods: Adolescent with mild and severe ...
Microstructural characterization of annulus fibrosus by ultrasonography: a feasibility study with an in vivo and in vitro approach Article dans une revue avec comité de lectureLANGLAIS, Tristan; DESPRAIRIES, Pierre; PIETTON, Raphaël; ROHAN, Pierre-Yves; DUBOUSSET, Jean; MEAKIN, Judith R.; WINLOVE, Peter C.; VIALLE, Raphaël; SKALLI, Wafa; VERGARI, Claudio (Springer Verlag, 2019)The main function of the intervertebral disc is biomechanical function, since it must resist repetitive high loadings, while giving the spine its flexibility and protecting the spinal cord from over-straining. It partially ...
Estimating pulmonary function after surgery for adolescent idiopathic scoliosis using biplanar radiographs of the chest with 3D reconstruction Article dans une revue avec comité de lecturePIETTON, Raphaël; BOULOUSSA, Houssam; LANGLAIS, Tristan; TAYTARD, Jessica; BEYDON, Nicole; SKALLI, Wafa; VERGARI, Claudio; VIALLE, Raphaël (The British Editorial Society of Bone & Joint Surgery, 2022)Aims This study addressed two questions: first, does surgical correction of an idiopathic scoliosis increase the volume of the rib cage, and second, is it possible to evaluate the change in lung function after corrective ...
Biomechanical Evaluation of Intercostal Muscles in Healthy Children and Adolescent Idiopathic Scoliosis: A Preliminary Study Article dans une revue avec comité de lecturePIETTON, Raphaël; DAVID, Mercedes; HISAUND, Alisa; LANGLAIS, Tristan; SKALLI, Wafa; VIALLE, Raphaël; VERGARI, Claudio (Elsevier, 2021)Spine deformity during adolescent idiopathic scoliosis can induce a rib-cage deformity. This bone deformity can have direct consequences on the chest-wall muscles, including intercostal muscles, leading to respiratory ...
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 ...