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European Spine Journal

, Volume 23, Issue 7, pp 1420–1426 | Cite as

Sagittal spinopelvic alignment in adolescents associated with Scheuermann’s kyphosis: a comparison with normal population

  • Long Jiang
  • Yong Qiu
  • Leilei Xu
  • Zhen Liu
  • Zhou Wang
  • Shifu Sha
  • Zezhang ZhuEmail author
Original Article

Abstract

Purpose

Spinopelvic alignment is increasingly considered as a main factor in the energy-efficient posture of the individual in normal and pathological status. However, the spinopelvic characteristics in Scheuermann’s kyphosis (SK) are poorly defined in the literature. The purpose of this study was to determine whether differences of the spinopelvic parameters exist between adolescents with SK and age-matched normal controls.

Methods

In this study, 55 patients with SK and 60 healthy age-matched adolescents were recruited consecutively. Sagittal spinal and pelvic parameters were measured from the standing lateral radiograph, including global kyphosis, thoracic kyphosis (TK), cervical lordosis (CL), lumbar lordosis (LL), pelvic incidence (PI), sacrum slope (SS), pelvic tilt (PT) and sagittal vertical axis (SVA). According to the location of the kyphosis, patients were subdivided into Scheuermann’s thoracic kyphosis (STK) group and Scheuermann’s thoracolumbar kyphosis (STLK) group. The radiographic comparison and correlation analysis were further performed.

Results

SK patients had significantly lower PI and PT than normal controls (32.0° vs. 45.0°, P < 0.001 for PI; 0.2° vs. 11.9°, P < 0.001 for PT). The rate of a negative PT was 41.8 % (22/55) in SK patients, which was remarkably higher than in normal controls (10.0 %, 6/60). The CL, TK and LL were significantly increased in STK group when compared with STLK and control groups. A significant correlation was noticed between TK and CL and also between TK and LL in STK group. Both TK and LL were decreased in STLK patients, and a significant correlation was found between them (r = −0.687, P < 0.001). A significantly strong correlation was also observed between LL and SS in STLK patients (r = −0.641; P < 0.001).

Conclusion

Adolescents with SK have a significantly lower PI when compared with age-matched normal controls. Patients with different curve patterns (STK vs. STLK) could have distinct compensatory mechanisms to maintain the sagittal balance.

Keywords

Scheuermann’s kyphosis Curve patterns Pelvic incidence Sagittal profile 

Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (81171672).

Conflict of interest

None.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Long Jiang
    • 1
  • Yong Qiu
    • 2
  • Leilei Xu
    • 2
  • Zhen Liu
    • 2
  • Zhou Wang
    • 2
  • Shifu Sha
    • 2
  • Zezhang Zhu
    • 1
    • 2
    Email author
  1. 1.Department of Spine SurgeryThe Affiliated Drum Tower Clinical Medical College of Nanjing Medical UniversityNanjingChina
  2. 2.Spine SurgeryThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjingChina

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