jkss Journal of Korean Society of Spine Surgery Journal of Korean Spine Surg 2093-4378 2093-4386 Korean Society of Spine Surgery 10.4184/jkss.2011.18.2.64 jkss-18-64 Original Article Clinical Results of Unilateral Partial Vertebroplasty(UPVP) in Osteoporotic Vertebral Fracture Yang Jun-Young M.D. Lee June-Kyu M.D. Cha Soo-Min M.D. Joo Yong-Bum M.D. Department of Orthopaedic Surgery, Research Institute of Medical Science, Chungnam National University School of Medicine, Daejeon, Korea Corresponding author: Jun-Young Yang, M.D. Department of Orthopedic Surgery, Chungnam National University School of Medicine, 640, Daesa-Dong, Jung-Gu, Daejeon, Korea TEL: 82-42-280-7351, FAX: 82-42-252-7098 E-mail: jyyang@cnu.ac.kr 32011 2132011 182 6469 03082010 31032011 07042011 Copyright © 2011 Korean Society of Spine Surgery 2011 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Study Design

This is a prospective clinical study

 Objectives

We wanted to compare the clinical results of conventional vertebroplasty(VP) and the newly devised unilateral partial vertebroplasty(UPVP)\.

 Summary of Literature Review

There has not been any study on how to reduce the amount of cement used while maintaining the height of the vertebral body and minimizing the adjacent compression fractures.

 Materials and Methods

From 2004 to 2008, Group 1 underwent VP and group 2 underwent UPVP. We compared the difference of the VAS score, the period of hospitalization, the infused amount of cement, the progression of the vertebral body collapse and fresh fracture of the adjacent vertebral body on the followup simple radiographs.

 Results

In group 1, the mean VAS score changed from 6.69 to 2.80, the mean period of hospitalization was 2.30 days and the mean amount of cement infused was 6.50cc. The degree of vertebral body collapse was 0.83, 0.76, 0.69 and 0.63 on followup, and 3 cases had fresh fracture. In group 2, the mean VAS score changed from 6.41 to 2.61, the mean period of hospitalization was 2.23 days and the mean amount of cement infused was 3.74cc. The degree of collapse was 0.71, 0.69, 0.68 and 0.63 on follow up and 1 case had fresh fracture. The two groups showed no statistical significance for the change of the VAS score and the period of hospitalization, and the amount of cement was significantly less in group 2. The degree of collapse was not significantly different on the 4 times of followup. The frequency of fresh fracture was significantly less in group 2.

 Conclusions

UPVP could achieve similar results for pain relief, the period of hospitalization and vertebral body collapse as compared to that of VP, but fresh fracture of the adjacent vertebral body was less. So, UPVP could be a better method than VP.

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(A)Simple AP radiographs of unilateral partial vertebroplasty(UPVP). (B) Through lateral view, we check the compression ratio during followup.