Objective To evaluate the ergotropic effect of bone cement on pedicle screw fixation in treatment of osteopo-rotic thoracolumbar fracture.Methods Fifty-three patients with osteoporotic thoracolumbar fracture, admitted from Jun. 2013 to Dec. 2014, were included for treatment by augmentation of pedicle screw fixation with bone cement. All patients underwent pre-operative examination of bone mineral density with T-score ≤-2.5 and augmentation of pedicle screw fixation with injection of 1.5 ml bone cement in adjacent to fractured vertebra. All patients were treated with anti-osteoporosis therapy pre- and post-operation, ob-served and recorded with basic conditions and complications. At pre-operation, one-week post-operation and last follow-up, pain vi-sual analogue scale (VAS) and neurological function score (ASIA) of all patients were recorded, and the compression rats of anterior and posterior edge of fractured vertebra, and compression rats of spinal canal and Cobb angel of all patients were measured.Results All the 53 patients were successfully undergone operation in about 90-140 min with blood loss of about 150-350 ml. No spinal cord or nerve injury, dural tear and obvious leakage of bone cement and screw loosening occurred during operation. All patients were followed up for 12 to 36 months and the neurological function obviously recovered contrasted with pre-operation. X-ray and CT examination at last follow-up showed good fractures healing, good position and non-loosening of internal fixation device and non-leakage of bone cement. At one week post-operation and last follow-up, VAS, compression rats of anterior edge and posterior edge of fractured vertebra, compression rats of spinal canal and Cobb angel were significantly lower than those at pre-operation (P<0.05), but no significant differences existed on these parameters between 1 week post-operation and last follow-up (P>0.05).Conclusions Augmentation of pedicle screw fixation with bone cement can effectively strengthen the initial stability of pedicle screw in osteo-porosis, restore the height of fractured vertebra and reduce the compression of spinal canal, which will help the correction of spinal kyphosis and neurological function recovery. This method can well maintain long-term stability of internal fixation in osteoporosis and height of fractured vertebra, and significantly reduce the risks of long-term screw loosening and vertebral collapse.%目的 评价骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰椎骨折的临床效果.方法 对2013年6月-2014年12月收治的53例骨质疏松性胸腰椎骨折患者进行骨水泥强化椎弓根螺钉固定治疗,所有患者术前骨密度检测T值均≤–2.5,术中均于伤椎邻近椎体注射1.5ml骨水泥强化椎弓根螺钉,术前和术后均给予抗骨质疏松治疗.观察和记录患者围术期基本情况及并发症发生情况.记录术前、术后1周和末次随访时患者疼痛视觉模拟评分(VAS)和神经功能情况(ASIA分级),测量术前、术后1周和末次随访时的伤椎前缘压缩率、伤椎后缘压缩率、椎管狭窄率和Cobb角.结果 53例患者均顺利完成手术,手术时间90~140min,出血量150~350ml;术中无神经损伤,无硬膜撕裂,无明显骨水泥渗漏和螺钉松动.所有患者均获随访,随访时间12~30个月.患者术后神经功能较术前有明显恢复.末次随访X线片及CT示椎体骨折均愈合,内固定位置良好,未见明显松动迹象,未见明显骨水泥渗漏.术后1周和末次随访时的VAS评分、伤椎前缘压缩率、伤椎后缘压缩率、椎管狭窄率、Cobb角与术前比较差异均有统计学意义(P<0.05),而术后1周与末次随访时比较差异均无统计学意义(P>0.05).结论 骨水泥强化椎弓根螺钉固定术能有效强化骨质疏松条件下内固定的初始稳定性,恢复骨折椎体的高度,减轻椎管内压迫,有利于后凸畸形的矫正和神经功能的恢复,并能很好地维持骨质疏松条件下内固定的远期稳定性和骨折椎体的高度,显著降低了远期螺钉松动和椎体塌陷的风险.
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