Disclosure of Interest: None Declared P086 Patients with osteoporotic compression fractures treated with Balloon kyphoplasty or RFkyphoplasty: 36 months follow up 1,* 1 1 1 Rahel Bornemann Lucia Anna Otten Tom Rainer Jansen Yorck Rommelspacher Dieter Christian 1 1 Wirtz Robert Pflugmacher 1 Klinik und Poliklinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Bonn, Bonn, Germany Preferred presentation method: No preference Declare any conflict of interest: No, none of the authors listed have any conflict of interest Background: In our study we wanted to compare the balloon kyphoplasty as an effective method of treating patients with painful vertebral compression fractures with the Radiofrequency Kyphoplasty. With this new system uncontrollable cement leakages should be prevented due to an unltra-high viscosity cement. For the statistical comparison of the two methods clinical and radiological data of 2 larger patient groups were evaluated during 36 months. Methods: We made a prospective evaluation with two patient groups with the same indication and with the same average VAS prior to treatment. For the BKP-group the same parameters like in the first group were evaluated (matched pairs). We used a visual analogue scale and the Oswestry Disability Score to analyse the pain intensity and the quality of life . For the radiological outcome the increase in the middle and anterior parts of the treated vertebra and also the reduction of kyphosis after surgery and after 6, 12, 24, and 36 months were evaluated. Furthermore, the extent of cement extrusion and the duration of operation time were compared. Results: For the radio frequency kyphoplasty group (RFK) 56 patients were followed during a 36 months time period. For the balloon kyphoplasty group (BKP) 56 appropriate patients were selected. In 49% of the RFKpatients and in 44% of the BKP-patients more than one vertebral body were treated. Prior to treatment 85 mm on the VAS were calculated in both groups. The decrease in VAS values was (RFK vs. BKP) immediately after surgery, 58 mm vs. 56 mm, and after 6, 12, 24 and 36 months. In both groups improvements in the Oswestry scores were registered after 6, 12, 24 and 36 months without a statistically significant difference. In both groups, the middle part of the vertebral bodies was increased by an average of 2.8 mm. RF yielded a decrease in the average kyphosis angle of 4.2, the BKP resulted in about 3.8 degrees. Concerning cement leakage a key difference in favor of the radio frequency kyphoplasty was detected (7.9% vs. 22.9%). For RFK a significant shorter duration of operation time was calculated (32 vs. 44 min). Conclusions: The RFK has proven to be a clinically very effective procedure that does somewhat better than BKP in long-lasting pain relief. No differences could be detected regarding improvement of functioning and the mean restoration of midand anterior vertebral height. As the safety aspect is concerned the RFK offers the advantage of a statistically significant lower proportion of cement extrusion.
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