Fig. 3From: Clinical observation of two bone cement distribution modes after percutaneous vertebroplasty for osteoporotic vertebral compression fracturesRadiographic 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 bodyBack to article page