Risk factors of recompression of cemented vertebrae after kyphoplasty for osteoporotic vertebral compression fractures.
To evaluate the risk factors correlated with loss of cemented vertebral body height after kyphoplasty in patients with osteoporotic vertebral compression fractures.



Thirty-four consecutive patients with single-level osteoporotic vertebral compression fractures who underwent kyphoplasty in the Affiliated Hospital of Jiangsu University between January 2012 and August 2014 were retrospectively analysed. Eight independent variables (age, gender, body mass index, pre-operative T-score in bone mineral density, the volume of polymethylmethacrylate injected, pre-operatively vertebral body height, the restoration of body height and the distance between polymethylmethacrylate and endplate) were assessed. The recompression of body height was the dependent variable. Multivariate linear regression analyses were used to determine the factors associated with recompression of body height.



Multiple linear regression analyses indicated that the recompression of cemented vertebral body height was correlated with the distance between polymethylmethacrylate and endplate (P = 0.008, b' = 0.489). The final multiple linear regression model, which included only the distance between polymethylmethacrylate and endplate, resulted in a formula that accounted for 41.02 % of the recompression of body height.



The distance between polymethylmethacrylate and endplate is an important risk factor of recompression of cemented vertebrae after kyphoplasty for patients with osteoporotic vertebral compression fractures.
Department of Orthopaedics, Affiliated Hospital of Jiangsu University, No. 438 Jiefang Road, Zhenjiang City, 212001, Jiangsu Province, China. jbspine123@163.com.
Dapeng
D
Li
Department of Orthopaedics, Affiliated Hospital of Jiangsu University, No. 438 Jiefang Road, Zhenjiang City, 212001, Jiangsu Province, China.
Yan
Y
Wu
Department of Orthopaedics, Affiliated Hospital of Jiangsu University, No. 438 Jiefang Road, Zhenjiang City, 212001, Jiangsu Province, China.
Yonghui
Y
Huang
Department of Radiology, Affiliated Hospital of Jiangsu University, Zhenjiang, 212001, Jiangsu, China.
Balaara
B
Augustine
Department of Orthopaedics, Affiliated Hospital of Jiangsu University, No. 438 Jiefang Road, Zhenjiang City, 212001, Jiangsu Province, China.
Jiawei
J
Yue
D000368:Aged; D001827:Body Height; D001843:Bone Cements / Q000009:adverse effects*; D015519:Bone Density; D005260:Female; D050815:Fractures, Compression / Q000601:surgery*; D006801:Humans; D058498:Kyphoplasty / Q000009:adverse effects* / Q000379:methods; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008875:Middle Aged; D058866:Osteoporotic Fractures / Q000601:surgery*; D019904:Polymethyl Methacrylate; D012189:Retrospective Studies; D012307:Risk Factors; D016103:Spinal Fractures / Q000601:surgery; D013904:Thoracic Vertebrae / Q000601:surgery
D001843:Bone Cements; D019904:Polymethyl Methacrylate
Distance between polymethylmethacrylate and endplate; Kyphoplasty; Osteoporotic vertebral compression fractures; Recompression