Treatment of osteoporotic compression fractures using the Sky Bone Expander system: A preliminary clinical report / 中国微创外科杂志

ABSTRACT

Objective To investigate the early clinical efficacy of percutaneous kyphoplasty using the Sky Bone Expander system in the treatment of osteoporotic compression fractures. Methods Twelve cases of osteoporotic vertebral body compression fracture (17 vertebrae) underwent percutaneous kyphoplasty using the Sky Bone Expander system. During the operation the unipedicle technique was applied and the expansion height was 14 mm for bone cement injection. Surgical complications and the restoration of vertebral height and kyphosis angle were observed. The pain of thoracic and lumbar region on the back was evaluated with the visual analogue scale (VAS). Results The operative time for each vertebra was 52.4?28.7 min (range, 23～90 min), with a volume of 5.4?1.0 ml (range, 3.5～7 ml) of cement injected. A follow-up was made for 3～6 months (mean, 4.5 months). The VAS scores were 7.6?1.8 points preoperatively, 2.8?1.1 points at day 1, 2.6?1.2 points at day 3, and 2.2?1.0 points at last follow-up. Preoperatively, the anterior vertebral height was 13.8?5.3 mm (compression by 49.1%?19.1%) and the midline vertebral height was 9.9?4.6 mm (compression by 39.8%?18.4%), while postoperative anterior and midline vertebral height were 16.6?4.8 mm (compression by 59.1%?17.2%) and 15.2?4.0 mm (compression by 60.6%?16.9%), respectively. The kyphotic angle was decreased from 22.3??8.5? preoperatively to 12.5??6.4? postoperatively. Intervertebral disc leakage of bone cement was observed in 1 case with no symptoms. There were no other surgical complications. Conclusions Kyphoplasty using the Sky Bone Expander system is an effective and safe treatment for osteoprotic vertebral compression fractures. The long-term outcomes are subject to further observations.