Marc-antoine Rousseau

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INTRODUCTION The literature has recently underlined the interest of pelvic and acetabular component orientation measurements in the standing and sitting position. Radiographic follow-up of total hip arthroplasty (THA) is based on standard AP and lateral X-rays. The use of EOS™ 2D imaging system reduces patient's radiation exposure compared to conventional(More)
Trunk balance in upright stance expresses an individual postural strategy found on anatomic and functional parameters. The "pelvic vertebra" is an essential transitional region for the coherence of spinal parameters (notably, lumbar lordosis and thoracic kyphosis) and pelvic parameters (sacral slope, pelvic tilt and incidence). Deterioration of this(More)
Surgical treatment of unstable odontoid fracture (type II OBAR or HTAL) has progressed, with a range of techniques, the specificities of which need to be known so as to determine their respective roles in the therapeutic arsenal now available. A retrospective study of 22 patients operated on in our center for odontoid fracture between 2005 and 2010 examined(More)
The anterior pelvic plane (APP) is currently used as superficial anatomical landmark for three-dimensional orientation during total hip arthroplasty (THA), specifically when using computer aided surgery. However, the actual parameter for characterizing the pelvic orientation is the sacral slope, which correlates with other functional spinal parameters. The(More)
STUDY DESIGN An interobserver and intraobserver reproducibility study of the use of EOS stereoradiography system at the cervical spine. OBJECTIVE To investigate reproducibility of the determination of the vertebral shape, position, and orientation of C3-C7 vertebrae in vivo using the EOS stereoradiography system. SUMMARY OF BACKGROUND DATA Since CT and(More)
BACKGROUND CONTEXT Total disc replacement is a novel approach for dynamically stabilizing a painful intervertebral segment. While this approach is gaining popularity, and several types of implants are used, the effect of disc arthroplasty on lumbar biomechanics has not been widely reported. Consequently, beneficial or adverse effects of this procedure may(More)
Lumbo-sacral orientation in the sagittal plane is of utmost importance, as it plays a critical role in the function of the spine and the hip joints. Equilibrium of the trunk influences the tridimensional orientation of the acetabulum and the functional range of motion of the hips. Each patient is characterized by a "morphological" parameter named incidence(More)
Local post-traumatic kyphosis may impair spinal sagittal balance and result in severe disability. The goal of this study is to evaluate posterior closing wedge osteotomy at the level of injury, by comparing thoracolumbar (T12-L1) and lumbar (L2-4) spinal levels. Thirteen consecutive patients had surgery in an average 13 months after the initial injury.(More)
STUDY DESIGN A computer-assisted analysis of dynamic lateral radiographs of the cervical spine in flexion/extension after total disc replacement. OBJECTIVE To analyze the in vivo kinematics of 2 types of ball-and-socket cervical disc arthroplasties. SUMMARY OF BACKGROUND DATA Clinical outcomes and range of motion (ROM) after cervical disc replacement(More)
STUDY DESIGN A conceptual study of the influence of the geometry of an articulated disc prosthesis at the cervical level using a 3-dimensional nonlinear finite element model. OBJECTIVE To investigate how the mechanical behavior of the functional spinal unit is affected by the position of the center and the size of the radius of a ball-and-socket design at(More)