• Lin-Qiang Ye, Liang de Department of Spinal Surgery, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, People's Republic of China., Xiao-Bing Jiang, Zhen-Song Yao, Huan Lu, Ting Qiu, Wei-Bo Yu, Ling Mo, Shun-Cong Zhang, and Da-Xiang Jin.
• Department of Spinal Surgery, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, People's Republic of China.
• Pain Physician. 2018 Jan 1; 21 (1): E33-E42.

BackgroundInsufficient cement distribution (ICD) in the fractured area has been advocated to be responsible for unsatisfied pain relief after percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures (OVCFs). However, little is known about risk factors for the occurrence of ICD.ObjectiveThe present study aimed to identify independent risk factors of the emergence of ICD.Study DesignA retrospective cohort study.SettingDepartment of spinal surgery, an affiliated hospital of a medical university.MethodsPatients who underwent PVP for single-level OVCF from January 2012 to September 2014 and met this study's inclusion criteria were retrospectively reviewed. Associations of ICD with co-variates (age, gender, bone mass density with a T-score, amount of injected cement, cement leakage, fracture level, fracture age, fracture severity grade, and location of the fractured area) and the influence of ICD on pain relief were analyzed.ResultsA total of 225 patients were included. ICD was found in 26 (11.6%) patients. Fractured area located in the superior portion of the index vertebra was significantly associated with occurrence of ICD. No further significant associations between the studied co-variates and emergence of ICD were seen in the adjusted analysis. In addition, patients with ICD had significantly higher immediate postoperative visual analog scale scores of back pain compared with those with sufficient cement distribution in the fractured area.LimitationLocation of the fractured area and cement distribution in the fractured area could not be evaluated quantitatively.ConclusionsThe incidence of ICD is higher in patients with the fractured area located in the superior portion of the index vertebra and ICD might be responsible for unsatisfied pain relief after PVP for OVCFs.Key WordsPercutaneous vertebroplasty, insufficient cement distribution, fractured area, risk factor, osteoporosis, vertebral compression fracture, spine, unsatisfied pain relief, cement augmentation.

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