Emmanuelle Ferrero, Renaud Lafage, Shaleen Vira, Pierre-Yves Rohan, Jonathan Oren, Edward Delsole, Pierre Guigui, Frank Schwab, Virginie Lafage, Wafa Skalli

August 2017, Volume 26, Issue 8, pp 2112 - 2120 Original Article Read Full Article 10.1007/s00586-016-4833-5

First Online: 05 November 2016


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.


Thirty ASD patients underwent biplanar radiographs and were divided into two groups (Cobb angle >30° or


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


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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