Global Spine J 2014; 04(02): 089-092
DOI: 10.1055/s-0034-1370790
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Instability of the Vertebrae Remains following Balloon Kyphoplasty

Kiyoshi Tarukado1, Osamu Tono1, Ko Ikuta2, Katsumi Harimaya3, Yoshihiro Matsumoto3, Seiji Okada3, Mitsumasa Hayashida3, Yukihide Iwamoto3, Toshio Doi1
  • 1Department of Orthopedic Surgery, Kyushu University Beppu Hospital, Oita, Japan
  • 2Department of Orthopedic Surgery, Karatsu Red Cross Hospital, Saga, Japan
  • 3Department of Orthopedic Surgery, Kyushu University, Fukuoka, Japan
Further Information

Publication History

26 March 2013

15 January 2014

Publication Date:
25 February 2014 (eFirst)


Study Design Retrospective cohort study.

Objectives The mechanism underlying the pain relief observed following balloon kyphoplasty (BKP) to vertebral compression fractures is reported to involve stabilization of the fractured vertebrae. However, whether fixation of the vertebrae was achieved immediately after BKP has not been investigated. The purpose of this study was to assess fixation of the vertebrae immediately after BKP and whether the instability was related to visual analog scale (VAS) scores.

Methods Thirty-eight patients with vertebrae that were evaluated on lateral roentgenkymography within 1 week after BKP were recruited. Instability was defined as a cleft observed between the cement and end plate of the vertebra in the supine position that disappeared in the sitting position, and the posterior wall height of the vertebra was reduced in the sitting position.

Results Instability of the vertebrae immediately after BKP was observed in 17 cases. VAS scores improved in all cases, and no significant differences were observed with or without instability.

Conclusions The mechanism of rapid pain relief following BKP was not strong fixation but some degree of stabilization or other factors. We suggest that more research is needed about the mechanism of pain relief following BKP in the future.