Three-dimensional reconstruction using stereoradiography for evaluating adult spinal deformity: a reproducibility study.
TypeArticles dans des revues avec comité de lecture
PURPOSE: In addition to the sagittal alignment, impact of transverse plane parameters (TPP) and rotatory subluxation on patients reported outcomes were highlighted. One of the hypotheses for genesis of degenerative scoliosis is disc degeneration with increased axial vertebral (AVR) and intervertebral rotation (AIR). Therefore, TPP analysis at early stage of the scoliosis seems of particular interest. This study aims at assessing reliability of tridimensional (3D) reconstructions of adult spinal deformity (ASD) patients. METHODS: Thirty ASD patients underwent biplanar radiographs and were divided into two groups (Cobb angle >30° or <30°). Spinal parameters and TPP (apical AVR, AIR of upper and lower level of main curve) were measured. Four operators performed 3D reconstructions twice. Intra and inter-observer reliabilities were analyzed using ISO standard 5725-2, to quantify the global standard deviation of reproducibility (S R). RESULTS: Mean Cobb angle was 31°, mean age 55 years (70% of female). Mean values of apical AVR, upper and lower level AIR were, respectively, 16° ± 15°, 6° ± 6° and 5° ± 5°. Spinopelvic parameters S R were below 4.5°. For Cobb angle <30°, S R was 7.8°, 9.6°, 4.5° and 4.9°, respectively, for AVR apex, torsion index, upper and lower AIR. Reliability was worse in the group of patients with Cobb angle above 30°. CONCLUSIONS: 3D analysis was reliable for Cobb and sagittal parameters. 3D analysis for TPP was reproducible when Cobb is below 30°. However, uncertainty is larger for Cobb above 30°. Nevertheless, 3D reconstructions could help surgeons to anticipate onset of rotatory subluxation while assessing axial rotation evolution for small deformity and choose best delay for surgical treatment.
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Clinical and stereoradiographic analysis of adult spinal deformity with and without rotatory subluxation FERRERO, Emmanuelle; LAFAGE, Renaud; CHALLIER, Vincent; DIEBO, Bassel G.; GUIGUI, Pierre; MAZDA, Keyvan; SCHWAB, Frank; SKALLI, Wafa; LAFAGE, Virginie (ELSEVIER, 2015)Introduction: In degenerative adult spinal deformity (ASD), sagittal malalignment and rotatory sublux-ation (RS) correlate with clinical symptomatology. RS is defined as axial rotation with lateral listhesis.Stereoradiography, ...
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Clinical Improvement Through Surgery for Adult Spinal Deformity: What Can Be Expected and Who Is Likely to Benefit Most ? MOAL, Bertrand; LAFAGE, Virginie; SMITH, Justin.S; AMES, Christopher P.; MUNDIS, Gregory; TERRAN, Jamie S.; KLINEBERG, Eric; HART, Robert; BOACHIE-ADJEI, Oheneba; SHAY, Bess; SKALLI, Wafa; SCHWAB, Frank (Scoliosis Research Society, 2015)Study Design: Multicenter, prospective, nonconsecutive, surgical case series from the International Spine Study Group. Objectives: To evaluate the extent of clinical improvement after surgery for adult spinal deformity ...
MOAL, Bertrand; BRONSARD, Nicolas; RAYA, Jose G.; VITAL, Jean-Marc; SCHWAB, Frank; SKALLI, Wafa; LAFAGE, Virginie (Baishideng Publishing Group, 2015)AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity (ASD) with magnetic resonance imaging (MRI) and 3D reconstructions. METHODS: Nineteen female ASD patients (mean age 60 ± ...
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