医用骨水泥在骨质疏松患者行椎弓根钉固定中的作用

目的：探讨应用骨水泥在骨质疏松患者行椎弓根钉同定术的临床效果和安全性。方法：对20例骨质疏松患者经骨水泥灌注后行椎弓根钉固定术，比较患者术后1周和复查时的X线片，观察内置物有无松动，骨水泥固定螺钉周围有无透亮线出现。并对复查患者行固定节段的CT扫描，观察螺钉周围有无透亮线出现。结果：18例(90％)患者获随访，平均随访时间18个月，X线片中均未发现内置物松动或脱出，固定节段植骨愈合良好．在骨水泥固定螺钉周围未发现有透亮线出现；CT扫描在螺钉周围也未发现透亮线出现。结论：对于骨质疏松患者．应用骨水泥对椎弓根钉固定进行加固可防止内置物松动脱出，有较好稳定脊柱的临床效果。但应注意手术技巧，确保没有骨水泥渗漏。     

骨水泥强化椎体技术在骨质疏松性脊柱后凸畸形手术治疗中的应用(16例报告)

[目的]探讨骨水泥强化椎体椎弓根钉棒系统治疗骨质疏松性脊柱后凸畸形的手术效果.[方法]应用骨水泥强化椎后椎弓根钉棒系统后路矫形内固定治疗骨质疏松性脊柱后凸畸形病人16例,观察后凸Cobb角矫正角度、内固定稳定情况及临床症状改善程度.[结果]椎弓根钉内固定系统无松动、脱落、断裂.后凸畸形Cobb角平均矫正22.1°,疼痛VAS评分由术前平均7.8分降至术后平均2.1分,ODI评分由术前平均86.5％改善至术后平均31.2％.[结论]应用骨水泥强化椎体椎弓根钉棒系统治疗骨质疏松性脊柱后凸畸形可获得满意的临床疗效.     

直入式注入PMMA骨水泥强化椎弓根钉内固定生物力学研究

【摘要】 目的 分析直入式骨水泥注入椎体强化方法在体外提高螺钉稳定性的效果。方法采用新鲜尸体脊柱标本共24个椎体,一侧椎弓根采用直入式注入PMMA骨水泥强化椎弓根钉固定作(试验组),另一侧椎弓根采用常规椎弓根螺钉固定(对照组),两侧进行最大轴向拔出力试验、最大旋出力矩试验、周期抗屈试验生物力学测试,比较两组测试结果。结果〓骨水泥强化组中螺钉的稳定性均显著强于单纯常规椎弓根螺钉组(P < 0.05)。结论〓应用PMMA行椎体强化椎弓根钉固定有利于增强对椎弓根钉的把持力,可有效防止椎弓根钉的松动及脱落,具有良好的临床效果。     

椎弓根螺钉内固定结合椎体成形术治疗骨质疏松相关性脊柱疾病

目的探讨椎弓根螺钉内固定结合椎体成形术治疗骨质疏松相关性脊柱疾病的疗效。方法回顾性总结2007年3月-2010年02月采用椎弓根螺钉内固定结合椎体成形术治疗11例骨质疏松相关性脊柱疾病的资料。采用VAS评分标准评估脊柱活动度,腰背痛及下肢痛情况。结果 11例患者成功实施了上述手术。术后所有患者均获得随访,平均随访时间为15个月(6～24个月)。腰痛及下肢神经压迫症状均明显缓解,VAS评分由术前平均9分到术后平均2分,脊柱侧凸、后凸畸形均明显改善。复查X线片均未发现椎弓根螺钉的松动脱出,固定节段植骨愈合良好。结论使用椎弓根螺钉内固定结合椎体成形术治疗骨质疏松相关性脊柱疾病短期疗效良好,长期效果有待继续随访观察。     

可注射骨水泥强化椎弓根螺钉治疗骨质疏松性胸腰椎爆裂骨折的临床疗效

背景:胸腰椎爆裂骨折的手术治疗常采用椎弓根螺钉内固定术,而老年患者由于骨质疏松易发生螺钉固定不牢靠,出现螺钉松动、退钉,造成固定失败。目的:探讨应用可注射骨水泥强化椎弓根螺钉内固定术治疗骨质疏松性胸腰椎爆裂骨折的临床疗效。方法:选取2014年1月至2015年9月西安交通大学医学院附属红会医院收治的骨质疏松性胸腰椎爆裂骨折患者56例,均采用可注射骨水泥强化椎弓根螺钉后路钉棒内固定术。记录患者术前及末次随访美国脊柱损伤协会(ASIA)神经功能分级,测量并比较患者术前、术后7 d、末次随访疼痛视觉模拟评分法(VAS)评分、Oswestry功能障碍指数(ODI)评分、伤椎椎体前后缘压缩率、后凸Cobb角。结果 :所有患者均顺利完成手术。术中无神经损伤发生,骨水泥无明显渗漏,骨折复位满意,术后神经功能较术前明显恢复。术后随访12~24个月,末次随访X线及CT检查示,椎体骨折愈合良好,内固定位置良好,未见螺钉松动、断钉。患者术后7 d、末次随访VAS评分、ODI评分、伤椎前后缘压缩率、后凸Cobb角均较术前下降(P均<0.05)。患者末次随访上述指标与术后7 d的差异均无统计学意义。结论:对于骨质疏松性胸腰椎爆裂骨折患者,骨水泥强化椎弓根螺钉内固定能提供坚实稳定性,有效恢复脊柱序列,维持椎体复位后高度,利于神经功能恢复,值得在临床中推广应用。     

聚甲基丙烯酸甲酯强化对骨质疏松椎弓根螺钉固定的生物力学作用

目的探讨聚甲基丙烯酸甲酯 (polymethylmethacrylate,PMMA)骨水泥强化椎弓根螺钉的方法和评价 PMMA强化骨质疏松椎弓根螺钉后的生物力学性质。方法 6具新鲜老年女性胸腰段骨质疏松脊柱标本 (T10～ L5),使用双能 X线骨密度吸收仪测试每个椎体的骨密度,随机取 16个椎体 (32侧椎弓根 ),一侧椎弓根拧入 CCD螺钉,测量最大旋入力偶矩后拔出螺钉作为正常对照组,用 PMMA骨水泥强化椎弓根螺钉作为修复固定组,行螺钉拔出试验;另一侧经导孔直接强化椎弓根螺钉后拔出作为强化固定组,记录三组螺钉的最大轴向拔出力。结果椎体平均骨密度为 (0.445± 0.019)g/cm2;螺钉最大旋入力偶矩为（ 0.525± 0.104） Nm;正常对照组螺钉最大轴向拔出力为 (271.5± 57.3)N;修复固定组为 (765.9± 130.7)N;强化固定组为 (845.7± 105.0)N。 PMMA骨水泥强化或修复骨质疏松椎弓根螺钉后最大抗压力明显高于强化前,差异有非常显著性意义 (P< 0.01)。结论 PMMA骨水泥强化骨质疏松椎弓根螺钉能显著增加螺钉在椎体内的稳固性。     

骨水泥强化椎弓根螺钉在腰椎滑脱伴骨质疏松椎体中的临床应用

目的 探讨骨水泥强化椎弓根螺钉在腰椎滑脱伴骨质疏松患者的手术方法和疗效.方法 2008年7月至2010年11月年期间收治腰椎滑脱伴骨质疏松患者12例,平均68岁.骨质疏松按Jikei分级Ⅱ级4例,Ⅲ级8例.所有患者行经椎弓根螺钉内固定,术中采用骨水泥强化提高螺钉稳定性,植入椎弓根螺钉共26枚,观察椎弓根螺钉术中及术后的稳定性.结果 患者未发生手术并发症,腰腿痛症状改善明显,术后VAS评分较术前比较改善明显.12例患者均获得随访,随访时间8-16个月,平均14个月.12例均获得骨性融合,X线片显示内固定无松动、断裂或脱落,螺钉周围未见透亮线出现.结论 经椎弓根骨水泥强化椎弓根螺钉,固化椎体的同时增加了椎弓根螺钉界面把持力,能够满足腰椎滑脱伴骨质疏松患者脊椎后路固定手术对力学稳定的要求.     

骨水泥强化椎弓根钉治疗胸腰椎骨质疏松性爆裂骨折

目的探讨应用骨水泥（poly—methylmethacrylate,PMMA）强化椎弓根钉内固定治疗胸腰椎骨质疏松性爆裂骨折的疗效。方法2009年1月至2011年1月应用骨水泥强化椎弓根钉内固定治疗12例胸腰椎骨质疏松性爆裂骨折患者。临床疗效采用视觉模拟（visualanaloguescale,VAS）疼痛评分、ASIA残损分级方法进行评定,应用X线片评估术后内固定效果。结果12例患者术后获6424个月（平均13．4个月）随访,VAS疼痛评分术前平均7．9分降至术后平均1．2分,7例合并神经损伤的患者ASIA残损分级术后改善1～2级。61枚椎弓根钉中44枚行骨水泥强化,术后所有患者均未出现与骨水泥渗漏有关的神经症状和体征。X线片示椎弓根钉未发生松动及脱出,周围无透亮线出现。后凸角由术前平均22．6°改善至术后平均10．3°,末次随访时后凸角平均为14．3°。结论应用骨水泥强化椎弓根钉内固定治疗胸腰椎骨质疏松性爆裂骨折可获得满意的临床疗效。     

椎弓根骨水泥灌注螺钉再植入的临床应用

目的探讨椎弓根骨水泥灌注螺钉再植入技术对骨质疏松患者手术治疗的临床疗效。方法骨质疏松患者16例,平均63．8岁。采用椎弓根骨水泥灌注螺钉再植入的方法植入椎弓根螺钉121枚,观察椎弓根螺钉术中及术后的稳定性。结果16例患者均获得随访,随访时间8～36个月,平均18个月。16例均获得骨性愈合,愈合时间为4～6个月,X线片显示内固定物无松动、断裂或脱落,螺钉周围未见透亮线出现。结论经椎弓根向椎体、钉道灌注聚甲基丙烯酸甲酯骨水泥,固化椎体的同时,增加了椎弓根螺钉的把持力,能够满足骨质疏松患者脊椎后路固定手术对力学稳定的要求。     

骨水泥螺钉与可膨胀椎弓根螺钉治疗严重骨质疏松腰椎病手术的比较

[目的]对比可灌注椎弓根骨水泥螺钉与可膨胀椎弓根螺钉应用于严重骨质疏松老年患者腰椎退变疾病手术的临床效果。[方法]选择本院2012～2015老年腰椎退变疾病合并严重骨质疏松患者30例;完善术前X线片、CT及MRI检查后,15例行经皮可灌注骨水泥螺钉固定+Mis-TILF减压手术技术,另15例行可膨胀螺钉固定+Mis-TILF减压手术技术。分别记录术前、术后VAS评分、JOA评分以及椎弓根钉松动率并进行统计分析。[结果]所有患者均顺利手术,术中均未出现神经损伤、骨水泥渗漏。所有患者随访1年以上。VAS评分随术后时间延长而逐渐减小、JOA评分随术后时间延长而逐渐增加,不同时间点间的差异均有统计学意义(P0.05)。随访中均未见螺钉断钉、断棒现象。可灌注椎弓根骨水泥螺钉组所有患者椎弓根螺钉未见松动现象,可膨胀椎弓根螺钉组有2例患者椎弓根钉出现不同程度松动,占可膨胀螺钉组13.3%,两组椎弓根钉松动率差异有统计学意义。[结论]微创下中空可灌注骨水泥螺钉应用于老年严重骨质疏松患者,在术后恢复过程中效果更可靠,固定更牢固,不易松动,可为老年微创手术患者提供稳定有效的脊柱内固定。     

直入式注入聚甲基丙烯酸甲酯骨水泥强化椎弓根钉内固定治疗骨质疏松性胸腰椎骨折

目的 探讨应用直入式注入聚甲基丙烯酸甲酯(PMMA)骨水泥强化椎弓根钉内固定治疗骨质疏松性胸腰椎骨折的疗效.方法 2009年1月至2010年2月应用直入式注入PMMA骨水泥强化椎弓根钉内固定治疗14例骨质疏松性胸腰椎骨折患者,男9例,女5例;年龄50～72岁,平均61岁.临床疗效采用视觉模拟(VAS)疼痛评分、Frankel分级方法进行评定,应用X线片评估术后内固定效果.结果 14例患者中13例术后获6～22个月(平均18.4个月)随访,1例失访.VAS评分由术前平均7.9分降至术后平均1.2分,7例合并有神经损伤的患者Frankel分级术后平均改善1.2级,58枚椎弓根钉中54枚行直入式注入PMMA骨水泥强化,术后所有患者均未出现与骨水泥渗漏相关的神经损伤症状和体征.X线片示椎弓根螺钉未发生松动及脱出,周围无透亮线出现.后凸角由术前平均21.8°改善至术后平均10.3°,末次随访后凸角平均为14.3°,平均后凸角矫正丢失40°.结论 应用直入式注入PMMA骨水泥强化椎弓根钉内固定治疗骨质疏松性胸腰椎骨折可获得满意的临床疗效.

Abstract：

Objective To explore clinical outcomes of direct injection of polymethylmethacrylate (PMMA) to augment pedicle screw fixation for osteoporotic thoracolumbar fractures. Methods From January 2009 to February 2010, 14 patients with osteoporotic thoracolumbar fracture underwent spinal decompression and instrumentation with PMMA augmentation of pedicle screw by direct injection. They were 9 men and 5 women, aged from SO to 72 years (average, 61 years). The clinical outcomes were evaluated by the visual analog scale (VAS) and the Frankel scale. Radiologic findings were documented to assess postoperative internal fixation. Results All but one of the patients obtained a mean follow-up of 18. 4 months (from 6 to 22 months). The mean VAS scores of the patients improved from 7. 9 to 1. 2 points (P < 0. 01). Postoperatively, Frankel grading for the 7 patients with neurologic deficit improved by 1. 2 grades. Totally 54 of the 58 screws were augmented with PMMA. There was neither neurologic deterioration nor symptomatic cement leakage after surgery. X-ray plain films revealed no screw loosening, pullout or bright lines around screws. On average,kyphotic deformity was improved from 21. 8° preoperatively to 10. 3° postoperatively (P <0. 01), and returned to 14. 3° at the final follow-up. The average loss of kyphosis correction was 4°. Conclusion Pedicle screw fixation after vertebral augmentation with PMMA by direct injection can gain a satisfactory clinical outcome for patients with osteoporotic thoracolumbar fracture.     

Reduced loosening rate and loss of correction following posterior stabilization with or without PMMA augmentation of pedicle screws in vertebral fractures in the elderly

Background

Therapy of vertebral fractures in the elderly is a growing challenge for surgeons. Within the last two decades, the use of polymethylmethacrylate (PMMA) in the treatment of osteoporotic vertebral fractures has been widely established. Besides vertebroplasty and kyphoplasty, the augmentation of pedicle screws with PMMA found widespread use to strengthen the implant–bone interface. Several studies showed an enhanced pullout strength of augmented screws compared to standard pedicle screws in osteoporotic bone models. To validate the clinical relevance, we analyzed postoperative radiologic follow-up data in regard to secondary loss of correction and loosening of pedicle screws in elderly patients.

Materials and methods

In this retrospective comparative study, 24 patients admitted to our level I trauma center were analyzed concerning screw loosening and secondary loss of correction following vertebral fracture and posterior instrumentation. Loss of correction was determined by the bisegmental Cobb angle and kyphosis angle of the fractured vertebra. Follow-up computed tomography (CT) scans were used to analyze the prevalence of clear zones around the pedicle screws as a sign of loosening.

Results

In 15 patients (mean age 76 ± 9.3 years) with 117 PMMA-augmented pedicle screws, 4.3 % of screws showed signs of loosening, whereas in nine patients (mean age 75 ± 8.2 years) with 86 uncemented screws, the loosening rate was 62.8 %. Thus, PMMA-augmented pedicle screws showed a significantly lower loosening rate compared to regular pedicle screws. Loss of correction was minimal, despite poor bone quality. There was significantly less loss of correction in patients with augmented pedicle screws (1.1° ± 0.8°) as compared to patients without augmentation (5° ± 3.8°).

Conclusion

The reinforcement of pedicle screws using PMMA augmentation may be a viable option in the surgical treatment of spinal fractures in the elderly.     

Clinical application of a pedicle nail system with polymethylmethacrylate for osteoporotic vertebral fracture

The instrumentation of the osteoporotic spine may sometimes result in failure due to the loosening or pullout of the conventional pedicle screw. Moreover, augmentation of screws with polymethylmethacrylate (PMMA) has risks of complications. We developed a new and original pedicle nail system with PMMA for osteoporotic vertebral fractures. A clinical evaluation of this novel pedicle nail system utilized in patients with an osteoporotic vertebral collapse was performed to determine the effectiveness and safety of this technique. Thirty-four elderly patients who suffered from osteoporotic compression fractures were treated by posterolateral fusion using the pedicle nail system. The mean follow-up period was 37 months. Of the 25 patients with neurological symptoms, two patients improved two stages at the Frankel level. Fifteen patients improved one stage at the Frankel level, and eight other patients improved, however, their improvement did not exceed a Frankel level. Nine cases with neuralgia symptoms improved from 4.4 to 2.2 points on average on the Denis pain scale (p < 0.01). The fusion rate was 94% as determined by X-rays of flexion and extension, and the correction of the compression fracture site was maintained well. A pedicle nail system stabilizes the spinal column with osteoporosis and reduces the instrumentation failure. The technique for the insertion of the pedicle nail reduces complication from cement augmentation. The authors speculate that the strategy using the pedicle nail system for osteoporotic spine may be effective and safe when the surgery is performed through a posterior approach.     

Biomechanical study of pedicle screw fixation in severely osteoporotic bone.

BACKGROUND CONTEXT: Obtaining adequate purchase with standard pedicle screw techniques remains a challenge in poor quality bone. The development of alternate insertion techniques and screw designs was prompted by recognition of potential fixation complications. An expandable pedicle screw design has been shown to significantly improve fixation compared to a conventional screw in poor quality bone. PURPOSE: The purpose of this study was to determine if polymethylmethacrylate (PMMA) bone cement augmentation of an expandable pedicle screw can further improve fixation strength compared to the expandable screw alone in severely osteoporotic bone. A technique for cement insertion into the pedicle by means of the cannulated central portion of the expandable screw is also described. STUDY DESIGN: The axial pullout strength, stiffness and energy absorbed of cemented and noncemented expandable pedicle screws was determined in cadaveric vertebrae. METHODS: Twenty-one fresh unembalmed vertebrae from the thoracolumbar spine were used. Radiographs and bone mineral density measurements (BMD) were used to characterize bone quality. Paired cemented and noncemented pedicle screw axial pullout strength was determined through mechanical testing. Mechanical pullout strength, stiffness and energy to failure was correlated with BMD. RESULTS: Overall, there was a 250% increase in mean pullout strength with the cemented expandable screw compared with a noncemented expandable screw including a greater than twofold increase in pullout strength in the most severely osteoporotic bone. The mean stiffness and energy absorbed to failure was also significantly increased. A cemented conventional screw achieved a pullout strength similar to the noncemented expandable screw. CONCLUSIONS: PMMA cement augmentation of the expandable pedicle screw may be a viable clinical option for achieving fixation in severely osteoporotic bone.     

膨胀式椎弓根螺钉结合骨水泥强化钉道在严重骨质疏松脊柱手术中的应用

目的 探讨膨胀式椎弓根螺钉结合骨水泥强化钉道在治疗严骨质疏松性脊柱内固定手术中的早期疗效。方法 自2006年10月至2008年10月对20例需行内固定治疗同时合并严重骨质疏松的腰椎疾病患者采用膨胀式椎弓根螺钉结合骨水泥强化钉道进行脊柱后路稳定手术,其中男9例,女11例;年龄43～73岁,平均59岁。分别于术后1周、3个月、6个月、12个月及24个月摄动力位X线片及CT扫描,了解螺钉稳定性、骨水泥分布及脊柱融合情况。术前及术后3个月时应用日本矫形外科协会(JOA)不腰痛评分及视觉模拟评分(VAS)评价疗效。结果 本组共置人膨胀式椎弓根螺钉168枚。所有患者术后获12～ 38个月（平均26个月）随访。术前及术后3个月JOA评分平均分别为(11.4±2.6)分和(24.9±1.6)分,差异有统计学意义(t= 19.776,P=0.000);术前及术后3个月VAS评分分别为(7.0±1.4)分和(2.1±1.3)分,差异有统计学意义(t=11.470,P=0.000)。螺钉及骨水泥在椎体内位置稳定,周围骨小梁致密,未见明显透光带,无内固定松动移位迹象;后外侧融合节段植骨愈合良好,椎体间或椎板、关节突及棘突旁有连续性骨小梁形成,连接上下椎体。临床症状明显缓解,无早期及晚期感染等并发症发生,无临床复发。结论 对于合并严重骨质疏松的脊柱后路内固定手术,膨胀式椎弓根螺钉结合骨水泥强化钉道的方法能够极大地提高螺钉固定的稳定性。     

多节段椎体增强后椎弓根钉内固定系统在骨质疏松性椎体骨折治疗中的应用

目的探讨多节段椎体增强后应用椎弓根钉内固定系统治疗骨质疏松性椎体骨折的疗效。方法自2004年起应用骨水泥强化椎体后椎弓根钉内固定系统治疗骨质疏松性椎体骨折12例,观察后凸Cobb角矫正度、内固定稳定情况及临床症状改善程度。结果12例患者获随访6~24个月,平均13个月,椎弓根钉内固定系统无松动、脱落、折断。后凸畸形Cobb角平均矫正24.2°,疼痛VAS评分由术前平均8.7分降至术后平均2.5分,ODI评分(%)由术前平均71.5改善至术后平均32.5。结论应用椎体增强后椎弓根钉内固定系统治疗骨质疏松性椎体骨折可获得满意的临床疗效。     

Polymethylmethacrylate augmentation of the pedicle screw: the cement distribution in the vertebral body

Many studies have proven that the polymethylmethacrylate (PMMA) augmentation of the pedicle screw can significantly increase stiffness and strength of spinal fixation. Some major complications have also been reported. However, there are no reports discussing cement distribution and its morphology in the osteoporotic vertebral body, which is critical in the analysis of the biomechanical strength of the pedicle screw and the risk of cement leakage after pedicle screw augmentation. In this study, we used computed tomography (CT) to evaluate the cement distribution in the osteoporotic vertebral body after PMMA augmentation of a pedicle screw and to analyze the factors leading to cement leakage. Two groups of patients were studied. Group A consisted 25 osteoporotic patients (mean age of 73 years) with spinal instrumentation who had a total of 145 pedicle screws and cement augmentation with biopsy needles. Group B consisted of 23 osteoporotic patients (mean age of 74.6 years) with spinal instrumentation who had a total of 125 cannulated pedicle screws with cement augmentation. All patients had CT evaluation of the cement distribution in the vertebral body after the surgery. The cement distribution in the vertebrae was divided into four zones in the axial CT view: anterior one-third, middle third, and posterior third of vertebral body, and the pedicle. The morphology of the cement distribution around the pedicle screw was defined as scattered type or concentrate type. The leakage pattern was divided to anterior–lateral, posterior–lateral, and canal leakage. The correlations among bone mineral density (BMD), the cement leakage rate, and cement distribution morphology were also analyzed. The results showed that most augmented pedicle screws had cement extension into three of the four zones of the vertebral body (66.3%), followed by two zones (20%), all four zones (11.5%), and only one zone (2.2%). Overall, 123 screws (84.8%) in Group A and 108 screws (86.4%) in Group B had cement concentrate type distribution. The cement leakage rate in Group A is 18.3% and 13.6% in Group B. Patients with a BMD <0.6 g/cm² had significantly higher rates of cement leakage and tended toward a scattered cement distribution. There was only one patient who had a symptomatic leakage (sciatica) in Group B. We concluded that the cement distribution after pedicle screw augmentation with biopsy needle or cannulated screw technique was mostly localized in three zones of the vertebral body, and patients with lower BMD had a higher risk of cement leakage and scattered cement distribution.     

geneX骨水泥强化骨质疏松椎体椎弓根钉的生物力学研究

目的评估骨质疏松情况下geneX骨水泥强化椎弓根钉的固定强度。方法应用微量注射泵对30个新鲜小牛腰椎标本注射稀盐酸建立骨质疏松椎体模型。60个椎弓根分为四组:geneX骨水泥组,硫酸钙骨水泥(CSC)组,聚甲基丙烯酸甲酯骨水泥(PMMA)组,对照组。随机选择一侧注射2.5 ml骨水泥,然后置入螺钉;另一侧行正常螺钉固定对照,应用材料试验机进行轴向拔出力测试,记录各组的轴向最大拔出力和能量吸收值并进行比较。结果 geneX组与CSC组两组拔出力及能量吸收值比较,差异无统计学意义(P>0.05),两组均显著低于PMMA组(P<0.05),两组均显著高于对照组(P<0.05)。结论 geneX骨水泥强化椎弓根钉可显著提高椎弓根固定强度,geneX骨水泥可用作椎弓根强化螺钉的填充材料。