title: Kyphoplasty does not maintain all restored height postoperatively: a prospective, comparative study.
abstract: From January to December 2008, balloon kyphoplasty was performed on 45 consecutive female patients with primary single-segment vertebral compression fractures as an inpatient procedure. All of the treated vertebral bodies were located within the thora-columbar region (T11-L2). Demographic data such as age, body mass index, fracture age, hospital stay, lumbar spine bone mineral density, and amount of bone cement injected per vertebrae were recorded. Patients were analyzed clinically by ambulatory status and the visual analog scale (VAS) for pain. Lateral radiographs were used to measure changes in anterior vertebral height. Mean anterior vertebral height increased from 58.9%+/-12.50% pre-kyphoplasty to 79.8%+/-7.12% post-kyphoplasty (P<.001).Two groups were defined based on the percentage of height restoration achieved: group A (18 patients) with a height restoration of at least 20%, and group B (27 patients) with a height restoration of 0% to 19.99% post-kyphoplasty. Mean anterior vertebral height restored in groups A and B was 28.2%+/-7.2% and 12.1%+/-6.2%, respectively (P<.05). Four patients in group A and none in group B had height loss at the treated vertebral level (P<.05). Both VAS and ambulatory status were improved after treatment (P<.05) with no significant difference between the 2 groups. Kyphoplasty can restore the collapsed vertebral height, but patients with greater height restoration were more vulnerable to a loss of corrected height.
authors: Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, China.
authors: Yi-Lei
authors: YL
authors: Zhao
authors: Hui-Lin
authors: HL
authors: Yang
authors: Joseph
authors: J
authors: Konrad
authors: Jiayong
authors: J
authors: Liu
authors: Muhammad
authors: M
authors: Moral
authors: Yao-Zeng
authors: YZ
authors: Xu
authors: De-Chun
authors: DC
authors: Geng
authors: Nabil A
authors: NA
authors: Ebraheim
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D015519:Bone Density; D005260:Female; D005500:Follow-Up Studies; D050815:Fractures, Compression / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007297:Inpatients; D058498:Kyphoplasty / Q000379:methods*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010147:Pain Measurement; D011184:Postoperative Period; D011446:Prospective Studies; D016103:Spinal Fractures / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome