经一侧伤椎短节段椎弓根固定联合椎体内植骨治疗胸腰段椎体骨折

目的 探讨经一侧伤椎短节段椎弓根固定联合椎体内植骨治疗胸腰段椎体骨折的可行性及疗效.方法 将自2005年1月～2009年5月行短节段椎弓根钉固定联合椎体内植骨治疗的102例胸腰段椎体骨折随机分为两组.A组行后路短节段椎弓根钉固定结合经一侧伤椎椎弓根固定联合椎体内植骨,B组行后路跨伤椎短节段椎弓根钉固定联合椎体内植骨.结果 本组获随访12～24个月.术后1周后凸Cobb角、椎体前缘高度两组间比较,差异无统计学意义(P＞0.05),末次随访时A组矫正角度、椎体前缘高度丢失量明显小于B组,差异有统计学意义(P＜.05).B组末次随访时腰背痛发病率以及内固定失败率明显高于A组,差异有统计学意义(P＜0.05).结论 经一侧伤椎短节段椎弓根固定联合椎体内植骨治疗胸腰段椎体骨折是一种有效的方法.     

后路短节段固定结合椎弓根植骨治疗胸腰段骨折

目的 探讨经椎弓根后路短节段复位内固定椎体、后外侧植骨联合、经椎弓根向伤椎椎体内植骨治疗胸腰椎段骨折的手术方法和临床疗效.方法 回顾性分析2007年6月至2011年4月收治的39例胸腰椎骨折患者资料,男21例,女18例;年龄18 ～48岁,平均31.5岁.按照治疗方法的不同分为观察组(经椎弓根后路短节段复位内固定、椎体后外侧植骨联合经椎弓根向伤椎椎体内植骨)和对照组(经椎弓根后路短节段复位内固定椎体、后外侧植骨),通过回顾病历资料及随访资料,对其影像学进行评价.结果 39例患者获12 ～ 36个月(平均20.1个月)随访,观察组与对照组术后即刻伤椎前缘高度恢复程度及成角的矫正程度比较差异无统计学意义(P＞0.05),术后12个月,对照组伤椎前缘高度变化及成角的矫正程度丢失不明显;而未经椎弓根植骨组变化明显,二组比较差异有统计学意义(P＜0.05). 结论 经椎弓根后路短节段复位内固定椎体、后外侧植骨联合经椎弓根向伤椎椎体内植骨治疗胸腰段脊柱骨折有良好的临床疗效,可有效地维持伤椎前缘高度,减少内固定失败率.     

后路短节段固定结合伤椎固定经椎弓根植骨治疗胸腰段骨折

[目的]探讨后路短节段结合伤椎椎弓根钉固定加伤椎经椎弓根植骨治疗胸腰段脊柱骨折的临床疗效。[方法]对本院2003~2007年收治的胸腰段骨折治疗进行回顾,总共随访到96例病例。28例采用单纯后路短节段椎弓根螺钉复位固定,68例患者采用短节段固定结合单侧伤椎螺钉固定结合经椎弓根植骨,其中38例植骨材料为人工骨,30例为自体髂骨植骨。按照美国脊柱创伤研究组提出的胸腰椎损伤严重性评分标准(thoraco lumbar injury severityscore,TLISS)分别对各组病例进行评分,术前、术后以及随访期间正侧位X线片,测量伤椎椎体前后缘高度,胸腰段后凸Cobb′s角,前后椎体高度比,应用SPSS 11.0进行统计学分析。[结果]术后平均随访16.8个月(12~20个月),所有骨折复位效果满意。单纯后路短节段固定比经椎弓根植骨结合后路短节段固定组高度丢失多,术后Cobb′s角的矫正能力差,应用人工骨与自体骨植骨组间无明显差异。[结论]经椎弓根植骨结合后路短节段固定加伤椎固定重建了椎体的高度,增加了脊柱前柱稳定性,可有效的防止内固定失败和矫正度丢失,是一种治疗胸腰段骨折的有效方法。     

颗粒骨经椎弓根椎体内外植骨融合内固定治疗胸腰椎骨折

目的探讨脊柱后路颗粒骨经椎弓根椎体内外植骨短节段椎弓根钉内固定治疗胸腰椎骨折可行性。方法将70例胸腰椎骨折随机分为两组:A组(n=20)采用颗粒骨经椎弓根椎体内植骨融合短节段椎弓根钉内固定;B组(n=50)采用单纯短节段椎弓根钉内固定。对后凸畸形角度及矫正角度、椎体前缘高度以及椎管矢状径进行测量,采用Frankel功能分级和Denis疼痛分级方法进行神经功能改变的评价。结果后凸畸形术后矫正度数较术前两组均很明显。随访中,A组矫正度数的丢失明显小于B组(P=0.0001)。术后伤椎前缘高度百分比增加值两组比较有显著差异(P<0.001)。术后随访中,A组伤椎椎体前缘高度无丢失(P<0.001),B组伤椎椎体前缘高度有丢失(P<0.05)。采用Denis疼痛分级,两组术后均有很好的改善。采用Frankel功能分级,术后神经功能变化,A组患者平均提高优于B组。结论脊柱后路颗粒骨经椎弓根椎体内外植骨结合内固定治疗胸腰椎骨折植骨融合率高,能有效恢复椎体高度和防止术后矫正度丢失。     

经椎弓根内固定椎体内植骨治疗胸腰椎骨折的临床研究

目的观察经椎弓根内固定椎体内植骨治疗胸腰椎骨折的临床疗效。方法骨折部位经椎弓根后路环状或侧方减压,经椎弓根椎体前部用漏斗植骨,并用短节段螺钉内固定系统固定治疗45例,术后观察脊髓功能改善、椎体高度丢失及椎管内变化。结果平均随访19.5个月,脊髓功能恢复按Frankel分级提高0～3级,椎体前缘高度增加47%,术后后凸Cobb角由术前平均22.6°恢复到3.1°。本组无断钉断棒、失稳,以及神经症状。结论经椎弓根内固定椎体内植骨治疗胸腰椎骨折,可以促进骨折愈合及增强节段稳定性,降低高度丢失、后凸畸形及断钉断棒并发症的发生率。     

椎体成形术辅助短节段椎弓钉内固定治疗胸腰段椎体爆裂骨折

目的　探讨预防胸腰段骨折术后出现继发性后凸畸形、避免椎弓钉断裂的手术方式。方法　对 2 0例胸腰段椎体不稳定爆裂骨折采取短节段椎弓钉固定结合钙磷骨水泥灌注椎体成形术。结果　本组术后 1周离床负重行走 ,3个月后腰背疼痛VAS评分平均减少 6分 ,术后X线摄片显示后凸Cobb角平均矫正 14° ,椎体高度丢失恢复 4 0 % ,随访 12个月后显示Cobb角只丢失0 4° ,椎体高度平均改变 0 15 % ,过伸过屈动力摄片显示固定段无异常活动 ,未发现有椎弓钉松动、断裂病例。结论　短节段椎弓钉固定结合钙磷骨水泥灌注椎体成形术可以使胸腰段爆裂骨折的稳定重建 ,提高手术疗效 ,避免术后内固定失败 ,预防继发后凸畸形。     

伤椎单侧置钉植骨治疗Denis B型胸腰椎爆裂骨折的临床研究

目的探讨后路伤椎单侧椎弓根置钉并对侧经椎弓根植骨治疗Denis B型胸腰椎爆裂骨折的远期临床疗效。方法回顾性分析2004年1月至2010年12月,采用后路伤椎单侧椎弓根置钉并结合对侧经椎弓根椎体内植骨治疗且获得完整随访的Denis B型胸腰椎爆裂骨折46例,其中男33例,女13例;年龄21~64岁,平均(42.0±21.4)岁。按Denis骨折分型均为爆裂性损伤B型单椎体不稳定骨折。于术前、随访期间拍X线片观察内固定在取出前是否出现内固定松动及断裂,通过CT观察椎体内植骨愈合情况,测量并比较分析Cobb角大小及伤椎椎体前、中、后缘高度压缩百分比。结果 46例患者获得36~49个月随访,平均39.7个月。内固定在取出前无松动和断裂。术后1周内Cobb角及椎体前、中、后缘压缩百分比与术前比较均明显变小,差异有统计学意义(P0.05);而终末随访与术后1周内、内固定取出前比较此4项指标无明显变化,差异无统计学意义(P0.05)。CT扫描显示椎体内植骨颗粒均获得骨性愈合。结论在后路短节段椎弓根内固定同时,采用后路伤椎单侧椎弓根置钉并结合对侧经椎弓根椎体内单侧植骨治疗Denis B型胸腰椎爆裂骨折,有利于矫正后凸畸形和恢复伤椎椎体高度,使后路短节段椎弓根螺钉有更加牢固的固定效果,防止术后伤椎椎体高度和矫正度丢失。     

经伤椎椎弓根椎体植骨短节段内固定治疗胸腰椎爆裂骨折

目的探讨经伤椎椎弓根椎体植骨结合后路短节段内固定治疗胸腰椎不稳定爆裂骨折的临床疗效。方法应用椎弓根内固定系统治疗胸腰椎不稳定爆裂性骨折22例,同时经伤椎椎弓根椎体内植入骨粒,10例术中行后路椎板减压。结果本组获随访12~24个月,椎体高度和后凸角无明显丢失,无内固定松动、断裂。结论椎弓根内固定为脊柱提供早期稳定性,经椎弓根椎体内植骨使伤椎获得坚强愈合为脊柱提供长期稳定,两者相结合疗效满意。     

经伤椎置钉辅以经椎弓根椎体内植骨治疗胸腰段椎体爆裂骨折

目的 观察经伤椎置钉辅以经椎弓根椎体内植骨治疗胸腰段椎体爆裂骨折的疗效.方法 采用经伤椎置钉辅以经椎弓根椎体内植骨治疗36例胸腰段椎体爆裂骨折,均为单节段椎体骨折.结果 随访12～18个月,术前Cobb角、伤椎相对高度分别是21.5°、46.5°,术后分别是2.4°、3.4°,术前术后差别有统计学意义.所有骨折复位满意,无其他并发症.结论 经伤椎置钉辅以经椎弓根椎体内植骨治疗胸腰段椎体爆裂骨折不仅骨折复位满意,而且降低了内固定松动和断裂概率,是治疗胸腰椎爆裂骨折的有效方法.     

胸腰段爆裂骨折伤椎内植骨术后矢状面形态变化

[目的]分析后路短节段椎弓根螺钉固定联合伤椎内植骨对胸腰段爆裂骨折椎体矢状面形态变化的影响。[方法]回顾性分析2014年1月~2017年1月因胸腰段爆裂骨折在本科行后路短节段椎弓根螺钉固定+伤椎内植骨术的41例患者的临床及影像学资料,根据CT矢状面重建图像,比较分析手术前后椎体前缘高度、椎体中央高度、Cobb角的变化,同时分析椎体骨折块向椎管内压迫程度的改善情况。[结果]41例患者均顺利完成手术,椎体前缘高度由术前(53.31±9.12)%恢复至术后的(98.23±8.68)%(P<0.001),椎体中央高度由术前(64.14±8.79)%恢复至术后的(92.52±6.01)%(P<0.001),Cobb角由术前(22.92±6.88)°恢复至术后的(8.17±6.06)°(P<0.001),骨折块压迫程度由术前(31.12±11.66)%恢复至术后的(9.30±4.68)%(P<0.001),椎体前缘高度恢复量为(44.92±3.90)%,优于椎体中央高度恢复量(28.38±3.67)%(P<0.001)。[结论]后路短节段椎弓根螺钉固定联合伤椎内植骨术能有效恢复椎体前缘高度,矫正后凸畸形,并通过间接复位的方式改善椎管内压迫,但并不能完全有效恢复椎体中央高度。     

Short-segment pedicle instrumentation of thoracolumbar burst fractures: does transpedicular intracorporeal grafting prevent early failure?

STUDY DESIGN: A prospective, randomized study comparing two treatment methods for thoracolumbar burst fractures: short-segment instrumentation with transpedicular grafting and the same procedure without transpedicular grafting. OBJECTIVE: To evaluate the efficacy of transpedicular grafting in preventing failure of short-segment fixation for the treatment of thoracolumbar burst fractures. SUMMARY OF BACKGROUND DATA: Short-segment pedicle instrumentation for thoracolumbar burst fractures is known to fail early because of the absence of anterior support. Additional transpedicular grafting has been offered as an alternative to prevent this failure. However, there is controversy about the results of transpedicular grafting. METHODS: Twenty patients with thoracolumbar burst fractures were included in the study. The inclusion criterion was the presence of fractures through the T11-L3 vertebrae without neurologic compromise. The patients were randomized by a simple method into two groups. Group 1 patients were treated using short-segment instrumentation with transpedicular grafting (TPG) (n = 10), and Group 2 patients were treated by short-segment fixation alone (NTPG) (n = 10). Clinical (Likert's questionnaire) and radiologic (sagittal index, percentage of anterior body height compression, and local kyphosis) outcomes were analyzed. RESULTS: The two groups were similar in age, follow-up period, and severity of the deformity and fracture. The postoperative and follow-up sagittal index, percentage of anterior body height compression, and average correction loss in local kyphosis in both groups were not significantly different. The failure rate, defined as an increase of 10 degrees or more in local kyphosis and/or screw breakage, was also not significantly different (TPG = 50%, NTPG = 40%, P = 0.99). CONCLUSIONS: Short-segment transpedicular instrumentation of thoracolumbar burst fractures is associated with a high rate of failure that cannot be decreased by additional transpedicular intracorporeal grafting.     

经椎弓根植骨治疗老年人胸腰椎爆裂性骨折

目的　探讨经椎弓根植骨结合短节段内固定对防止老年人胸腰椎爆裂性骨折后期后凸畸形及腰背部疼痛的意义。方法　采用经椎弓根植骨结合短节段内固定治疗老年胸腰椎爆裂性骨折 1 6例 ,术后及随访期间摄X线片测定椎体成角、上下终板成角、椎体前缘高度与正常高度的比值 ,了解患者后期腰背部疼痛情况 ,了解有无内固定失败等并发症。结果　通过经椎弓根植骨结合短节段内固定治疗 ,椎体成角、上下终板成角、椎体前缘高度与正常高度的比值均明显改善 ,术后随访测量以上结果与术后相比无明显变化。随访期间 3例有轻度腰背部疼痛 ,其余无腰背部疼痛。无一例发生内固定折断、拔出、松动等并发症。结论　采用经椎弓根植骨结合短节段内固定治疗老年胸腰椎爆裂性骨折可有效地防止后期出现后凸畸形及腰背部疼痛 ,是治疗老年胸腰椎爆裂性骨折较理想的方法之一     

Treatment of acute thoracolumbar burst fractures with kyphoplasty and short pedicle screw fixation: Transpedicular intracorporeal grafting with calcium phosphate: A prospective study

Background:

In the surgical treatment of thoracolumbar fractures, the major problem after posterior correction and transpedicular instrumentation is failure to support the anterior spinal column, leading to loss of correction and instrumentation failure with associated complaints. We conducted this prospective study to evaluate the outcome of the treatment of acute thoracolumbar burst fractures by transpedicular balloon kyphoplasty, grafting with calcium phosphate cement and short pedicle screw fixation plus fusion.

Materials and Methods:

Twenty-three consecutive patients of thoracolumbar (T₉ to L₄) burst fracture with or without neurologic deficit with an average age of 43 years, were included in this prospective study. Twenty-one from the 23 patients had single burst fracture while the remaining two patients had a burst fracture and additionally an adjacent A1-type fracture. On admission six (26%) out of 23 patients had neurological deficit (five incomplete, one complete). Bilateral transpedicular balloon kyphoplasty with liquid calcium phosphate to reduce segmental kyphosis and restore vertebral body height and short (three vertebrae) pedicle screw instrumentation with posterolateral fusion was performed. Gardner kyphosis angle, anterior and posterior vertebral body height ratio and spinal canal encroachment were calculated pre- to postoperatively.

Results:

All 23 patients were operated within two days after admission and were followed for at least 12 months after index surgery. Operating time and blood loss averaged 45 min and 60 cc respectively. The five patients with incomplete neurological lesions improved by at least one ASIA grade, while no neurological deterioration was observed in any case. The VAS and SF-36 (Role physical and Bodily pain domains) were significantly improved postoperatively. Overall sagittal alignment was improved from an average preoperative 16° to one degree kyphosis at final followup observation. The anterior vertebral body height ratio improved from 0.6 preoperatively to 0.9 (P<0.001) postoperatively, while posterior vertebral body height improved from 0.95 to 1 (P<0.01). Spinal canal encroachment was reduced from an average 32% preoperatively to 20% postoperatively. Cement leakage was observed in four cases (three anterior to vertebral body and one into the disc without sequalae). In the last CT evaluation, there was a continuity between calcium phosphate and cancellous vertebral body bone. Posterolateral radiological fusion was achieved within six months after index operation. There was no instrumentation failure or measurable loss of sagittal curve and vertebral height correction in any group of patients.

Conclusions:

Balloon kyphoplasty with calcium phosphate cement secured with posterior short fixation in the thoracolumbar spine provided excellent immediate reduction of posttraumatic segmental kyphosis and significant spinal canal clearance and restored vertebral body height in the fracture level.     

经后路椎弓根内固定椎体成形治疗胸腰椎爆裂性骨折

椎体成形术治疗胸腰椎爆裂性骨折预防术后形成“空心椎”、蛋壳椎引起的椎体塌陷、后凸畸形以及顽固性腰背痛和继发性神经损伤。方法收治T11～L4胸腰椎暴裂性骨折患者15例，年龄24～78岁。短节段椎弓根复位固定复位后经伤椎通过椎弓根灌注HA／PMMA骨水泥4～8ml。随访9～14月，均没有发生脊髓损伤加重。术前有不完全损伤的13例，术后Frankel分级神经功能恢复1级或以上12例。伤椎前缘术前平均高度16．1cm，术后随访27．3cm。伤椎椎管内矢状径术前平均7．1mm．随访矢状径18．1mm。矢状位恢复佳,矢状面指数(SI)，术前20度，术后5度。后路椎弓根内固定伤椎椎体内灌注生物活性骨水泥，即刻恢复伤椎强度和刚度，减少了后路内固定的应力，防止后凸畸形，减少并发症。     

经伤椎与跨节段固定治疗无脊髓损伤的胸腰段A3型骨折

目的 比较经伤椎固定与跨节段固定治疗无脊髓损伤胸腰段A3型骨折的疗效.方法 回顾性分析无脊髓损伤的AO分型为A3型的52例胸腰段单椎体爆裂性骨折患者的临床资料,并按固定方法不同分为A、B两组.A组23例为2005年1月至2006年12月采用后路经伤椎椎弓根钉固定的患者,其中男性18例,女性5例;平均年龄(35.3±8.3)岁;伤椎分布:T_(11)1例、T_(12)9例、L_111例、L_2 2例.B组29例为1999年1月至2004年12月采用传统后路跨节段经椎弓根固定的患者,其中男性20例,女性9例;平均年龄(37.3±6.8)岁;伤椎分布:T_(11)1例、T_(12)7例、L_120例、L_2 1例.分别于术前、术后即刻、术后2年对患者临床疗效与影像学指标进行对比分析.结果 患者均获随访,随访时间24～84个月,平均(37.4±10.9)个月.A、B两组比较,术前、术后即刻、术后2年JOA、VAS平均评分差异均无统计学意义;术后即刻Cobb角平均矫正度分别为13.7°±7.7°、8.8°±5.0°,术后2年平均矫正丢失度分别为2.9°±1.5°、5.0°±2.9°,差异均有统计学意义(P<0.01);术后即刻伤椎前缘高度平均矫正度分别为(29.4±6.0)%、(21.7±6.9)%,术后2年平均矫正丢失度分别为(3.1±0.8)%、(6.6±3.0)%,而术后即刻伤椎后缘高度平均矫正度分别为(8.5±3.2)%、(6.1±1.8)%.术后2年平均矫正丢失度分别为(2.0±0.8)%、(3.4±1.0)%,两组伤椎前、后缘高度术后即刻平均矫正度及术后2年平均丢失度差异均有统计学意义(P<0.01).A组术后即刻CT显示11例(47.8%)椎管内骨折块完全复位、12例(52.2%)复位后矢状径狭窄<1/3,复位效果优于B组(P<0.01).术后未出现神经损伤及与伤椎置钉有关的并发症.B组出现2例螺钉断裂.结论 经伤椎固定治疗胸腰段A3型骨折能获得更好的初期复位,术后2年矫正丢失较跨节段固定少.     

USS复位内固定结合经椎弓根植骨治疗胸腰椎爆裂性骨折

目的探讨采用通用脊柱系统(USS)复位内固定结合经椎弓根植骨治疗胸腰椎爆裂性骨折的临床疗效。方法采用通用脊柱系统(USS)复位内固定结合经椎弓根植骨治疗胸腰椎爆裂性骨折27例,术后及随访期间摄X线片,测定椎体成角、上下终板成角、椎体前缘高度与正常高度的比值,了解术后骨折复位情况以及随访期间内固定有无失败和复位丢失情况。结果通过手术复位,椎体成角、上下终板成角、椎体前缘高度与正常高度的比值均明显改善,术后随访测量以上结果与术后相比无明显变化,无一例发生内固定失败。结论采用USS复位内固定结合经椎弓根植骨治疗胸腰椎爆裂性骨折可有效地防止内固定失败以及脊柱骨折复位丢失和后凸畸形,是治疗胸腰椎爆裂性骨折较理想的方法。     

Posterior short-segment instrumentation and limited segmental decompression supplemented with vertebroplasty with calcium sulphate and intermediate screws for thoracolumbar burst fractures

Purpose

Thoracolumbar burst fractures treated with short-segment posterior instrumentation without anterior column support is associated with a high incidence of implant failure and correction loss. This study was designed to evaluate the clinical and radiographic results following posterior short-segment instrumentation and limited segmental decompression supplemented with vertebroplasty with calcium sulphate and intermediate screws for patients with severe thoracolumbar burst fractures.

Methods

Twenty-eight patients with thoracolumbar burst fractures of LSC point 7 or more underwent this procedure. The average follow-up was 27.5 months. Demographic data, radiographic parameters, neurologic function, clinical outcomes and treatment-related complications were prospectively evaluated.

Results

Loss of vertebral body height and segmental kyphosis was 55.3 % and 20.2° before surgery, which significantly improved to 12.2 % and 5.4° at the final follow-up, respectively. Loss of kyphosis correction was 2.2°. The preoperative canal encroachment was 49 % that significantly improved to 8.8 %. The preoperative pain and function level showed a mean VAS score of 9.2 and ODI of 89.9 % that improved to 1.4 and 12.9 % at the final follow-up, respectively. No implant failure was observed in this series, and cement leakage occurred in two cases without clinical implications.

Conclusions

Excellent reduction and maintenance of thoracolumbar burst fractures can be achieved with short-segment pedicle instrumentation supplemented with anterior column reconstruction and intermediate screws. The resultant circumferential stabilization combined with a limited segmental decompression resulted in improved neurologic function and satisfactory clinical outcomes, with a low incidence of implant failure and progressive deformity.     

经皮椎弓根螺钉内固定结合椎体内植骨治疗胸腰椎骨折

 目的 探讨经皮椎弓根螺钉结合椎体内植骨治疗胸腰椎骨折的有效性。方法 采用 Sextant微创脊柱系统结合椎体内植骨技术治疗无神经功能损害、载荷分享评分逸7分的胸腰椎 A型骨折患者 20例, 并与同期行开放椎弓根螺钉内固定结合椎体内植骨治疗的 20例患者进行比较, 观察两组间的临床及影像学各项指标。结果 两组患者间性别、年龄、手术时机及载荷分享评分差异无统计学意义;但手术时间及出血量经皮组明显小于开放组(P约 0.05)。两组患者术后椎体前高、后凸角均显著恢复(P<0.05);术后 1年, 两组均见椎体前高和后凸角的显著丢失(P约 0.05);末次随访, 两组也均未见上述指标的进一步丢失。影像学指标与临床疗效两组间差异无统计学意义, 经皮组影像学指标恢复略差, 但临床疗效略优。结论 (1)经椎弓根椎体内植骨技术可应用于治疗载荷分享评分逸7分、无神经功能损害的胸腰椎爆裂骨折;(2)尽管经皮椎弓根螺钉内固定术的影像学各指标略差于开放组, 但由于其损伤小、出血少等优点, 仍获得较好的临床疗效。     

Indirect spinal canal decompression of vertebral burst fracture in calf model

Introduction An experimental study of experimental burst fractures in bovine spinal specimens was conducted to analyze the effects of transpedicular short-segment posterior fixation followed by reduction on indirect spinal canal decompression.Materials and methods For this purpose, experimental burst fractures were created in 11 bovine specimens with a hydraulic materials-testing machine. The specimens were evaluated with plain radiographs and CT scans before reduction. Thereafter, they were instrumented with titanium transpedicular screws and rods (short-segment posterior fixation); and reduction was achieved which included distraction and kyphosis correction maneuvers.Results Each spinal specimen was evaluated with plain radiographs and CT scans after reduction by applying distraction and kyphosis correction maneuvers. Plain radiographic analysis showed that the kyphosis angle and segmental height values improved. Furthermore, CT scans revealed that the spinal canal diameter values improved compared with those before reduction. The differences between before and after reduction in kyphosis angle, segmental height, anterior body compression, and percentage of retropulsion were statistically significant.Conclusion Short-segment posterior fixation followed by indirect spinal canal decompression led to an improvement over spinal canal retropulsion in experimental burst fractures. Furthermore, the kyphosis angle and segmental height values improved following the reduction compared with those before reduction.The present study was performed in the Department of Orthopaedics and Traumatology, Cumhuriyet University School of Medicine, and Cumhuriyet University Technical School Laboratory.     

经伤椎内固定椎间椎体内打压植骨治疗胸腰椎骨折

目的探讨后路经伤椎短节段复位内固定联合椎间椎体打压植骨治疗胸腰椎骨折的疗效。方法采用经伤椎后路复位短节段内固定、椎间椎体内植骨治疗21例胸腰椎骨折患者。根据术前、术后1周及末次随访时正、侧位X线片评判术后伤椎椎体前缘高度、后凸Cobb角恢复及内固定失败和骨融合情况。结果患者均获随访,时间12~32个月。未见断钉断棒及内固定松动。伤椎及椎间植骨均获骨性愈合。伤椎椎体前缘高度:术后1周为95.1%±3.2%,末次随访时为93.9%±3.6%,均较术前39.6%±10.3%明显改善(P0.01)。损伤节段后凸Cobb角:术后1周为12.2°±2.9°,末次随访时为12.9°±3.5°,均较术前(33.7°±6.2°)明显恢复(P0.01)。末次随访时与术后1周比较,伤椎椎体前缘高度和Cobb角均无明显变化(P0.05)。结论后路经伤椎短节段内固定联合椎间及伤椎打压植骨治疗胸腰椎骨折,重建了椎间和椎体的稳定性,有助于减少术后内固定失败及矫正丢失。