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Early Adjacent Vertebral Fractures after Balloon Kyphoplasty for Osteoporotic Vertebral Compression Fractures.

Asian Spine Journal 2018 November 30
Study Design: Retrospective cohort study.

Purpose: To evaluate the incidence and risk factors for early adjacent vertebral fractures following balloon kyphoplasty (KP).

Overview of Literature: KP is a safe and effective treatment for pain alleviation in patients with osteoporotic vertebral compression fractures (OVCF). However, some studies have reported that the risk of newly developed fractures increases at the adjacent vertebra after KP.

Methods: Total 123 consecutive patients with painful OVCF who underwent KP were enrolled from January 2009 to June 2016. Early adjacent vertebral fractures were defined as new fractures that had developed within 3 months after surgery. Sex, age, body mass index (BMI), bone mineral density (BMD), vertebral height, kyphotic angle, Visual Analog Scale score, cement amount, and leakage were evaluated as risk factors for adjacent vertebral fractures. Only cement leakage into the disc space was included in this study.

Results: Early adjacent vertebral fractures were identified in 20 (16.2%) of the 123 patients. The mean time to diagnosis of fractures was 1.7±0.7 months after KP. The average patient age was 78.0±0.7 years, average BMI was 23.06±3.83 kg/m2 , and mean BMD was -3.61±1.22 g/m2 . Cement leakage was present in 16 patients, and fractures developed in 11 (68.7%). In contrast, fractures developed in nine patients (8.2%) without cement leakage. There were no significant differences in terms of age, BMI, BMD, kyphotic angle, or vertebral body height ratio between the fracture and control groups.

Conclusions: Cement leakage into the disc increased the risk of early adjacent vertebral fractures after balloon KP.

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