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Radiographic evaluation of compressed vertebrae. A The anterior vertebral height ratio(AVHR) was defined as the height of the anterior wall of the compressed vertebral body(b) / (the height of the anterior wall of the upper vertebral body(a) + the height of the anterior wall of the lower vertebral body(c))×2. B Cobb angle was defined as the angle formed by the upper endplates(Line a) and lower endplates(Line b) of the fractured vertebral body
