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Fig. 1 | Journal of Orthopaedic Surgery and Research

Fig. 1

From: Bone cement distribution is a potential predictor to the reconstructive effects of unilateral percutaneous kyphoplasty in OVCFs: a retrospective study

Fig. 1

A–D Radiographic evaluation of compressed vertebrae. A Anterior vertebral height ratio (AVHR) was calculated as percentile of anterior vertebral height of the compressed vertebra (b), divided by the mean anterior vertebral height of the adjacent upper and lower vertebrae (a + c)/2. The anterior vertebral height restoration rate (AVHRR) = preoperative AVHR − postoperative AVHR. B Cobb angle was determined as the degree between the lines of lower endplate of compressed vertebra and the adjacent upper vertebra. The Cobb angle correction (CR) = preoperative Cobb angle − postoperative Cobb angle. C–D Examples of preoperative (C) and postoperative (D) images for evaluating vertebral restoration. The X-ray films were taken 1 day before and after the surgery, respectively, from an 80-year-old female patient with L3 compression fracture. Both the AVHRR (35.5% = 87.3–51.8%) and CR (11.3° = 16.1°–4.8°) are significant after treated by unilateral PKP

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