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Zhongqiang Chen, Yan Zeng, Weishi Li, Zhaoqing Guo, Qiang Qi and Chuiguo Sun

S harp focal kyphosis of the thoracolumbar spine is most commonly reported in cases of congenital kyphosis, old vertebral tuberculosis, and malunited fractures of the spine. This type of deformity can compromise the spinal cord or lead to severe low-back pain. Furthermore, kyphosis can cause severe psychological problems. Since 1985, when Thomasen 18 first reported a transpedicular closing wedge osteotomy in treating ankylosing spondylitic kyphosis, this technique has been widely used for correcting kyphosis of various kinds with good results. 3 , 4 , 17

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Yan Zeng, Zhongqiang Chen, Qiang Qi, Zhaoqing Guo, Weishi Li, Chuiguo Sun and Andrew P. White

P ost - tuberculosis kyphosis can result when the anterior column becomes structurally incompetent after the destruction of infected vertebrae. In children, progressively severe kyphosis can also develop with ongoing spinal growth, particularly when multiple vertebrae are involved. The kyphotic deformity can be significant in many cases. Patients with significant kyphosis typically present with cosmetic and functional problems related to the biomechanical changes associated with the kyphosis. The influence of spinal balance on function and quality of

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Da Zou, Weishi Li, Fei Xu and Guohong Du

diseases at our spine center for the period between July 1, 2015, and December 31, 2015. Inclusion criteria were 1) an age of 50 years or older and 2) lumbar CT scanning and central DXA scanning within a month before surgery. Exclusion criteria were 1) a history of spinal surgery; 2) the presence of spinal tuberculosis, tumor, ankylosing spondylitis, diffuse idiopathic skeletal hyperostosis, and other diseases that could significantly affect bone metabolism and BMD; and 3) the presence of severe degenerative changes in the intervertebral disc or endplate at L5–S1 with no