Balloon kyphoplasty is a well-established treatment option to achieve pain relief and to correct kyphotic deformity caused by osteoporotic vertebral compression fracture. However, it has been demonstrated that reduction is partly lost as balloon is deflated in the vertebral body. An intravertebral expander was developed for better reduction and maintenance of vertebral body height while cement is injected. This study evaluates the efficacy of kyphoplasty with a new intravertebral expander with regard to correction of kyphosis angel and to restoration of vertebral body height.

Inclusion Criteria:

• Osteoporotic vertebral body fractures that were classified as A1 fractures according to Arbeitsgemeinschaft Osteosynthesis (AO) Classification

Exclusion Criteria:

• More than 2 vertebral body fractures
• Fractures of vertebral body based on malignancy
• Previous spinal operation
• Spinal infection
• Spinal deformity (scoliosis)

Patients with new osteoporotic vertebral body fractures who were eligible for kyphoplasty and were treated with kyphoplasty, were observed prospectively 12 months after the surgery. In the follow-up period the clinical and radiological data were collected