经皮穿刺颈椎髓核成形术治疗多间隙颈椎间盘突出症

目的:探讨经皮穿刺颈椎髓核成形术(percutaneous cervical nucleoplasty,PCN)治疗多间隙颈椎间盘突出症的临床疗效及其对颈椎稳定性的影响。方法:对我院2003年7月～2005年6月因颈椎间盘突出症住院行PCN治疗的64例患者进行回顾性研究,根据手术间隙分为两组:单间隙组(A组)34例,多间隙组(B组)30例。临床效果评价采用JOA评分标准(17分制并计算改善率),颈椎稳定性评价采用Katsumi标准。比较两组的临床效果及颈椎稳定性。结果:随访6～24个月,A组平均14.1±3.7个月,B组平均13.9±3.8个月,A组术前JOA评分为9.19±2.64分,术后为14.37±1.42分,改善率为66.3%;B组术前JOA评分为8.89±2.31分,术后为14.33±1.28分,改善率为67.1%,与术前比较均有显著性差异(P<0.001),两组患者的JOA评分改善率无显著性差异(P>0.05)。两组患者术后颈椎稳定性与术前比较均无显著性差异(P>0.05)。结论:PCN治疗多间隙颈椎间盘突出症效果优良,对颈椎稳定性影响小,不会造成颈椎失稳。     

Discover颈人工椎间盘置换术治疗颈椎病的临床研究

目的:比较分析Discover颈人工椎间盘置换术和颈椎前路减压融合术治疗颈椎病的临床疗效.方法:回顾分析2009年4月～2010年5月手术治疗的101例颈椎病患者,所有患者按照手术方法的不同分为人工椎间盘置换和椎间融合两组.其中人工椎间盘置换组46例(男27例,女19例,年龄46.2±10.3岁)采用Discover颈人工椎间盘置换术治疗.椎间融合组55例(男32例,女23例,年龄44.8±11.4岁)采用颈椎前路减压融合术治疗,分别对两组患者术前和末次随防时疼痛视觉模拟评分(visual analogue scale,VAS)、颈椎功能障碍指数(neck disability index,NDI)、术后症状改善优良率以及C2～C7的Cobb角(C2-C7角)、手术节段脊柱功能单位Cobb角(FSU角)、手术相邻节段活动度等影像学指标进行观察分析,评价患者的颈椎功能改善情况,并进行两组间的对比分析.结果:椎间融合组手术时间为149.3±51.7min,术中出血量为213.5±42.6ml;人工椎间盘组手术时间为132.5±44.1min,术中出血量为173.2±56.4ml,两组间比较无统计学差异(P＞0.05).人工椎间盘组和椎间融合组随访时间分别为24.2±3.2个月和25.6±2.9个月.随访期间两组均未发现假体或植骨松动及移位,无内固定松动及断裂.两组患者术后神经功能均有显著恢复,疼痛症状明显改善,椎间融合组VAS及NDI评分末次随访时分别较术前下降了65.1％和63.7％,人工椎间盘组分别下降了67.1％和63.6％,两组之间比较无统计学差异(P＞0.05).末次随访时椎间融合组C2-C7角和FSU角较术前分别下降了28.1％和68.8％,手术相邻上节段和下节段活动度较术前分别上升了21.3％和28.4％,差异有显著性(P＜0.05);人工椎间盘组C2-C7角、FSU角较术前分别上升了7.7％和11.2％,手术相邻上节段及下节段活动度较术前分别上升了5.5％及9.3％,差异无统计学意义(P＞0.05). C2-C7角、FSU角和手术相邻节段活动度术后改变两组间比较有统计学差异(P＜0.05).人工椎间盘组和椎间融合组术后症状改善优良率分别为91.3％和87.3％,两组间比较无统计学差异(P＞0.05).结论:采用Discover颈人工椎间盘置换术治疗颈椎病能够取得和颈椎前路减压融合术相近的临床疗效,同时手术节段运动功能得到了保留,手术相邻节段的活动度并无增加,可作为颈椎病的有效治疗方法.     

经皮髓核成形术与椎间盘切除术治疗退变性颈椎间盘突出症

目的比较经皮髓核成形术与经皮椎间盘切除术治疗退变性颈椎间盘突出症的临床疗效及对颈椎稳定性的影响。方法2002年7月至2004年12月共收治退变性颈椎间盘突出症患者80例,行经皮髓核成形术42例(PCN组),经皮椎间盘切除术38例(PCD组)。回顾性分析两组的临床资料,比较两组在手术时间、临床效果及颈椎稳定性等的差异。结果所有病例随访6~26个月,PCN组平均(12±5)个月;PCD组平均(12±4)个月。两组手术均获成功。两组手术时间有显著差异(t=-21·70,P=0·000);两组手术临床效果(JOA评分)经自身配对t检验显示均有显著性差异(PCN:t=14·05,P=0·000;PCD:t=-14·79,P=0·000),即两组均有效;两组手术临床效果(Williams评分)经Kruskal-Wallis检验无显著差异(z=-0·377,P=0·706,>0·05),即两组临床效果相似。两组手术后均无颈椎不稳病例发生,颈椎稳定性手术前后均无显著差异(P>0·05)。结论经皮髓核成形术与经皮椎间盘切除术治疗颈椎间盘突出症的临床疗效优良,对颈椎稳定性影响小,不会造成颈椎失稳的发生。     

颈椎前路手术对脊髓型颈椎病患者椎间盘组织中炎性细胞因子的影响

目的 探讨颈椎前路手术对脊髓型颈椎病(CSM)患者椎间盘组织中炎性细胞因子的影响.方法 35例脊髓型颈椎病患者(CSM组)和30例颈椎外伤患者(对照组)均行颈椎前路手术治疗,观察治疗效果.采用固相分离放射免疫分析法(SPRIA)测定两组颈椎间盘组织中白细胞介素(IL)-6、IL-8、肿瘤坏死因子(TNF)－α水平.结果病程≤6个月组优良率为81.8％,病程＞6个月组优良率为38.5％,两组优良率比较差异有统计学意义(P＜0.05);CSM患者术前JOA评分为(9.73±2.12)分,术后JOA评分为(14.21±2.52)分,术后JOA评分显著高于术前(P＜0.05);CSM组颈椎间盘中IL-6、IL-8、TNF-α水平均显著高于对照组(P＜0.05).结论 颈椎前路手术是治疗CSM的一种较有效手术方法;IL-6、IL-8、TNF-α在颈椎间盘退变和CSM发病中起重要作用.     

经皮激光椎间盘减压术治疗神经根型颈椎病的2年疗效观察

目的:观察经皮激光椎问盘减压术(percutaneous laser disc decompression,PLDD)治疗神经根型颈椎病的疗效.方法:2002年12月～2005年6月我院采用PLDD治疗神经根型颈椎病患者31例,其中获得2年连续随访者24例,男,女各12例,年龄37-74岁,平均52.7岁,其巾单节段手术者7例,双节段手术者12例,3节段手术者5例.采用JOA 20分法对术后1、3、6、12、24个月的疗效进行评价.结果:术后1、3、6、12、24个月的JOA评分优良率(改善率≥50%患者所占比例)分别为45.8%、50%、583%、70.8%、66.7%,各时间点的优良率比较无统计学差异(P＞0.05).结论:PLDD治疗神经根型颈椎病具有一定的疗效,且在术后2年内疗效稳定.     

腰椎间盘激光汽化减压术前椎间盘造影的临床意义

目的探讨椎间盘造影对经皮穿刺腰椎间盘激光汽化减压术(PLDD)的意义。方法对50例腰椎间盘突出症先作腰椎间盘造影,再对病变椎间盘进行PLDD治疗。对造影图像进行Dallas分级,以JOA评分为疗效指标,比较不同Dallas分级的病变椎间盘治疗效果。结果正常椎间盘造影结果均为Dallas0～Ⅰ级,病变椎间盘DallasⅡ级组34例,DallasⅢ级组16例,两组患者术前JOA评分差异无显著性,术后JOA评分DallasⅡ级组为(21.2±4.4)分,DallasⅢ级组(14.2±3.8)分,两组数据差异有显著性(P<0.05)。结论DallasⅡ级的病变椎间盘更适合行PLDD治疗,与CT、MRI相结合,椎间盘造影可以有效地选择适合PLDD治疗的患者。     

PTED与ACDF治疗单节段神经根型颈椎病的疗效评价

目的分析颈椎后路经椎间孔镜开窗减压髓核摘除术(PTED)与颈椎前路椎间盘切除融合术(ACDF)治疗神经根型颈椎病的临床疗效。方法回顾性分析自2013-05—2015-05分别采用PTED与ACDF治疗的45例神经根型颈椎病,PTED组15例,ACDF组30例。比较2组手术时间、术中出血量,术后3个月及末次随访时VAS评分、JOA评分、NDI指数、颈椎活动度,以及末次随访时SF-36评分。结果 PTED组14例、ACDF组27例获得9~26(15.6±5.1)个月随访。2组手术时间差异无统计学意义(P0.05);但PTED组术中出血量较ACDF组少,差异有统计学意义(P0.05)。术后3个月,PTED组邻近下位节段活动度较ACDF组小,颈椎整体活动度明显大于ACDF组,差异有统计学意义(P0.05);但2组邻近上位节段活动度比较差异无统计学意义(P0.05)。末次随访时,PTED组邻近上、下位节段活动度均小于ACDF组,差异有统计学意义(P0.05);但2组颈椎整体活动度比较差异无统计学意义(P0.05)。术后3个月PTED组VAS评分、JOA评分、NDI指数均较ACDF组改善明显,差异有统计学意义(P0.05);但末次随访时2组比较差异无统计学意义(P0.05)。结论 PTED与ACDF治疗单节段神经根型颈椎病临床疗效满意,PTED能有效保留颈椎活动度,减少邻近节段退变,值得临床推广应用。     

经皮微创技术治疗颈椎间盘突出症

 目的 比较经皮颈椎间盘切除术(percutaneous cervical discectomy, PCD)、经皮颈椎间盘髓核成形术(percutaneous cervical disc nucleoplasty, PCN)与联合使用两种微创技术(percutaneous cervical discectomy and nucleoplasty, PCDN)治疗颈椎间盘突出症的临床疗效及其对颈椎稳定性的影响。方法 回顾性分析 2003年 2月至 2011年 4月收治的退变性颈椎间盘突出症患者 171例。年龄 21~74岁, 平均 47.8岁。 171例患者分为三组: PCD组 97例, 男 53例, 女 44例;PCN组 50例, 男 29例, 女 21例; PCDN组 24例, 男 15例, 女 9例。比较三组的临床效果及颈椎稳定性。结果所有病例中位随访 4.1年: PCD组 4.2年, PCN组 2.6年, PCDN组 3.3年。三组手术均获成功。三组手术临床效果(JOA评分), 经手术前后配对 t检验示差异均有统计学意义(PCD: t=21.85, P 0.05)。结论 应用 PCD、PCN以及联合使用这两种微创技术的 PCDN治疗颈椎间盘突出症的临床疗效优良, 对颈椎稳定性影响小, 不会造成颈椎失稳的发生。     

黑川式和改良黑川式双开门椎板成形椎管扩大术治疗颈椎疾病的对比研究

目的 观察和对比黑川式和改良黑川式双开门椎板成形椎管扩大术治疗颈椎疾病的中远期疗效.方法 回顾性分析2002年1月至2010年12月行颈椎双开门椎板成形椎管扩大术并获随访的172例患者资料,男性126例,女性46例,年龄35 ～ 80岁,平均(57±l9)岁.其中颈椎病106例,颈椎管狭窄症45例,颈椎后纵韧带骨化症21例.其中行黑川式手术69例(传统术式组),行改良黑川式手术103例(改良术式组).两组患者具有可比性,比较两组疗效根据资料不同采用t检验、x2检验和秩和检验.结果 所有患者均获随访,随访时间12～120个月,平均(52±33)个月;其中随访时间≥2年的患者123例,≥5年的患者71例.所有患者末次随访JOA评分均较术前明显改善(t=3.420,P＜0.01),两组术后改善率差异无统计学意义(P＞0.05);但术后3个月改良术式组患者术后出现轴性症状的比例(3.9％)要明显低于传统术式组(14.5％)(x2 =7.548,P＜0.05).改良术式组术后3个月颈椎椎间活动度下降情况优于传统术式组(27％±6％比19％±4％,Z=6.34,P=0.036＜0.05),中远期随访椎间活动度两组差异无统计学意义.结论 黑川式和改良黑川式双开门椎板成形椎管扩大术临床应用中远期疗效满意.改良黑川式手术因避免颈后部的伸肌组群损伤,可以降低术后轴性症状的发生率.     

2种微创方法治疗包容型颈椎间盘突出症的比较

目的比较经皮穿刺颈椎间盘切吸术(percutaneous cervical discectomy,PCD)和经皮穿刺射频消融髓核成形术(percutaneous coablation nucleoplasty,PCNP)治疗包容型颈椎间盘突出症的疗效、并发症、对椎间稳定性的影响。方法回顾分析2006年1月～2010年6月94例包容型颈椎间盘突出症行PCD(PCD组,n=53)和PCNP(PCNP组,n=41)的临床资料,比较PCD和PCNP治疗颈椎间盘突出症的疗效、手术并发症及对颈椎稳定性的影响。结果 94例均获得随访,PCD组平均随访13个月(5～21个月),PCNP组平均随访11个月(7～15个月)。根据改良MacNab标准,PCD组和PCNP组术后1周优良率分别为83.0%和80.5%(χ2=0.010,P=0.944),术后半年优良率分别为81.1%和78.0%(χ2=0.136,P=0.712),术后1年优良率分别为78.4%和74.4%(χ2=0.205,P=0.651)。PCD组在随访期间内有3例(5.7%)因复发性椎间盘突出改行前路颈椎间盘摘除植骨融合术(anterior cervical discectomy and fusion,ACDF),PCNP组2例(4.9%)因复发性椎间盘突出改行ACDF,2组病人术后均未出现椎间盘炎等不良事件。PCD组术前、术后1周内、术后半年、术后1年椎间高度(intervertebralheight,IVH)分别为(7.14±0.84)、(7.12±0.93)、(7.09±0.78)、(7.11±0.82)mm,与PCNP组相应时点(7.32±0.95)、(7.23±0.87)、(7.21±0.81)、(7.22±0.91)mm比较无统计学差异(P>0.05),随访未见颈椎不稳征象。结论 PCD和PCNP治疗包容型颈椎间盘突出症均能快速缓解患者临床症状。PCD和PCNP治疗颈椎间盘突出症并发症发生率低,术后IVH无明显丢失,对颈椎间的稳定性也无明显影响。PCD和PCNP是2种安全而有效的经皮椎间减压方法。     

炎症在腰椎间盘退变、突出、吸收发病机制中的作用

腰椎间盘退变、突出是下腰痛的主要原因,炎症与腰椎间盘退变及下腰痛密切相关.病理性退变的椎间盘细胞出现炎症介质异常表达,炎症介质诱导激活基质金属蛋白酶,加剧椎间盘退变.纤维环破裂、髓核组织暴露于硬膜外,激发急性创伤炎症反应,合成、分泌大量炎症介质,引起神经根炎,导致坐骨神经痛,同时炎症反应促使腰椎间盘突出组织吸收.该文就近年来有关炎症与腰椎间盘病变关系的研究进展作一综述.     

Mechanobiology of the intervertebral disc and relevance to disc degeneration

Mechanical loading of the intervertebral disc may contribute to disc degeneration by initiating degeneration or by regulating cell-mediated remodeling events that occur in response to the mechanical stimuli of daily activity. This article is a review of the current knowledge of the role of mechanical stimuli in regulating intervertebral disc cellular responses to loading and the cellular changes that occur with degeneration. Intervertebral disc cells exhibit diverse biologic responses to mechanical stimuli, depending on the loading type, magnitude, duration, and anatomic zone of cell origin. The innermost cells respond to low-to-moderate magnitudes of static compression, osmotic pressure, or hydrostatic pressure with increases in anabolic cell responses. Higher magnitudes of loading may give rise to catabolic responses marked by elevated protease gene or protein expression or activity. The key regulators of these mechanobiologic responses for intervertebral disc cells will be the micromechanical stimuli experienced at the cellular level, which are predicted to differ from that measured for the extracellular matrix. Large hydrostatic pressures, but little volume change, are predicted to occur for cells of the nucleus pulposus during compression, while the highly oriented cells of the anulus fibrosus may experience deformations in tension or compression during matrix deformations. In general, the pattern of biologic response to applied loads suggests that the cells of the nucleus pulposus and inner portion of the anulus fibrosus experience comparable micromechanical stimuli in situ and may respond more similarly than cells of the outer portion of the anulus fibrosus. Changes in these features with degeneration are critically understudied, particularly degeneration-associated changes in cell-level mechanical stimuli and the associated mechanobiology. Little is known of the mechanisms that regulate cellular responses to intervertebral mechanobiology, nor is much known with regard to the precise mechanical stimuli experienced by cells during loading. Mechanical factors appear to regulate responses of the intervertebral disc cells through mechanisms involving intracellular Ca(2+) transients and cytoskeletal remodeling that may regulate downstream effects such as gene expression and posttranslational biosynthesis. Future studies should address the broader biologic responses to mechanical stimuli in intervertebral disc mechanobiology, the involved signaling mechanisms, and the apparently important interactions among mechanical factors, genetic factors, cytokines, and inflammatory mediators that may be critical in the regulation of intervertebral disc degeneration.     

腰椎间盘突出症患者突出椎间盘及相邻椎间盘退变程度的MRI分析

目的:分析腰椎间盘突出症患者突出椎间盘及相邻椎间盘的术前MRI表现,评估其退变程度。方法:回顾性分析2014年6月~2015年12月在宁夏医科大学总医院脊柱骨科已行手术治疗的的单节段腰椎间盘突出症患者100例,其中男56例,女44例,年龄23~79岁(51.68±5.60岁),将所有患者以10年为一年龄段进行分组。突出椎间盘发生在L4/5节段50个,其相邻椎间盘100个;L5/S1节段50个,其相邻椎间盘50个。观察术前腰椎MRI,椎间盘采用Pfirrmann分级标准进行评估;软骨终板形态以Pappou分级标准进行评估。年龄段间的比较采用单因素方差分析,相邻椎间盘与退变椎间盘间的相关性采用Pearson相关分析,相邻椎间盘间的比较采用t检验。结果:各年龄段L4/5、L5/S1突出椎间盘的Pfirrmann分级均在Ⅲ级以上、Pappou分级均在Ⅱ级以上,各年龄段间椎间盘退变结果有统计学差异(P0.05);而各年龄段间软骨终板退变结果无统计学差异(P0.05)。各年龄段间突出椎间盘发生在L4/5、L5/S1的上位相邻椎间盘Pfirrmann分级有统计学差异(P0.05),下位相邻椎间盘Pfirrmann分级各年龄段无统计学差异(P0.05),相邻椎间盘软骨终板退变结果各年龄段间无统计学差异(P0.05)。相邻的L3/4椎间盘Pfirrmann分级与突出的L4/5椎间盘Pfirrmann分级有相关性(r=0.696,P=0.000),相邻L5/S1椎间盘Pfirrmann分级与突出L4/5椎间盘Pfirrmann分级间无相关性(r=0.214,P=0.136);相邻的L3/4、L5/S1椎间盘软骨终板形态Pappou分级与突出的L4/5椎间盘软骨终板形态Pappou分级均有相关性(r=0.467,P=0.001;r=0.380,P=0.007)。相邻L4/5椎间盘的Pfirrmann分级与突出L5/S1椎间盘的Pfirrmann分级有相关性(r=0.549,P=0.000);相邻L4/5椎间盘软骨终板形态Pappou分级与突出L5/S1椎间盘的软骨终板形态Pappou分级有相关性(r=0.684,P=0.001)。L4/5椎间盘突出的相邻L3/4椎间盘Pfirrmann分级和软骨终板形态Pappou分级评分分别为3.26±0.87分、1.54±0.50分,均高于相邻L5/S1椎间盘的2.96±0.59分、1.23±0.49分(P0.05)。结论:腰椎间盘突出症患者突出节段的相邻椎间盘及软骨终板的退变与年龄及突出椎间盘退变程度关系密切,且相邻上位椎间盘较下位椎间盘退变更明显。     

Intervertebral disc cell- and hydrogel-supported and spontaneous intervertebral disc repair in nucleotomized sheep

Purpose

Regenerative repair is a promising new approach in treating damaged intervertebral discs. An experimental scheme was established for autologous and/or allogenic repair after massive disc injury.

Methods

Disc healing was promoted in 11 animals by injecting in vitro expanded autologous/homologous disc cells 2?weeks after stab injury of lumbar discs L1-2. The following control discs were used in our sheep injury model: L2-3, vehicle only; L3-4, injury only; L4-5, undamaged; and lumbar discs from four non-experimental animals. Disc cells were suspended in a biologically supportive albumin/hyaluronan two-component hydrogel solution that polymerizes when inserted in order to anchor cells at the injection site. The parameters studied were MRI, DNA, glycosaminoglycan, collagen content, histology, immunohistology for collagens type I, II and aggrecan, and mRNA expression of GAPDH, β-actin, collagen type I, II, X, aggrecan, lubricin, and IL-1β.

Results

All parameters demonstrated almost complete healing of the injured discs after 6?months, when compared with data from both the endogenous non-injured controls as well as from the healthy animals.

Conclusion

Sheep experience spontaneous recovery from disc injury. The process of endogenous repair can be enhanced by means of hydrogel-supported cells.     

Human intervertebral disc cell culture for disc disorders

Repair of degenerated intervertebral discs by engineered tissue is a clinical challenge in spinal surgery. Prerequisites are cultivation of intervertebral disc cells and determination of their biologic properties. The influence of disc damage in different spinal disorders on the outcome of disc cell cultures has not been discussed previously. This study showed the feasibility of cultivation of cells from damaged human intervertebral discs and the dependence of cellular culture properties on the underlying disc disorder. Human intervertebral disc cells were isolated from disc tissue obtained during surgical procedures for scoliosis, osteochondrosis, and disc herniation. After proliferation in monolayer culture, cells were embedded in a mixed matrix composed of fibrin and hyaluronic acid. Deoxyribonucleic acid content, hydroxyproline content, and proteoglycan synthesis were determined on Days 7, 14, and 21. In a three-dimensional environment only cells obtained from scoliotic and osteochondrotic discs showed significant deoxyribonucleic acid and proteoglycan synthesis. However, hydroxyproline content increased only in cells from scoliotic discs. The results of this study show that the formation of extracellular matrix components under three-dimensional culture conditions is dependent on the nature of intervertebral disc damage of the tissue processed.     

颈椎间盘突出症合并腰椎间盘突出症的非手术治疗

目的：研究非手术治疗颈椎间盘同症合江腰椎间盘同症的疗效。方法：核计从１９９０．２至１９９８．２,住院患者中颈椎间估出症合交腰椎间盘突出症５５例,同期颈椎间突出症３５７例,腰椎间盘突出症５８９例,分别占１５．４１％和９．３４％,优良率为８０％。而且作者描述了该疾病的症状、体征、非手术治疗的方法,同时介绍了牵引、推拿的注意事项。结论：非手术治疗（包括干扰素治疗）颈椎间盘突出症合并腰椎间盘突出症是有效的     

Thoracic disc herniation mimicking acute lumbar disc disease

STUDY DESIGN: Case report of a 49-year-old woman with a lower thoracic disc herniation mimicking acute lumbosacral radiculopathy. OBJECTIVE: To describe an unusual case of thoracic disc herniation mimicking acute lumbar disc disease. SUMMARY OF BACKGROUND DATA: Symptomatic thoracic disc herniation is rare and its clinical manifestations differ widely from those of cervical and lumbar disc herniations. Midline back pain and signs of spinal cord compression progressing over months or years are the predominant clinical features. Acute and subacute thoracic disc herniation occurs in less than 10% of patients, and isolated root pain is unusual. METHODS: A 49-year-old woman had acute low back pain radiation into the left buttock and the lateral aspect of the left leg and left foot. Magnetic resonance imaging study showed a bulging disc and posterior osteophytes at T11-T12. RESULTS: Surgical removal of the herniated disc and osteophytes rapidly relieved her symptoms and neurologic deficits. A follow-up neurologic examination 3 years later showed normal motor and sensory functions, although low back soreness was noted occasionally. CONCLUSION: A case of thoracic disc herniation mimicking an acute lumbosacral radiculopathy is presented. Compression of the lumbosacral spinal nerve roots at the lower thoracic level after exit from the lumbar enlargement may be the mechanism for this unusual presentation.     

人工髓核假体置换术治疗腰椎间盘突出症

目的 比较人工髓核假体（PDN）置换术和传统单纯髓核摘除术治疗腰椎间盘突出症的疗效,评价人工髓核假体置换术的实用价值。方法 施行人工髓核假体置换术18例,16例为单节段腰椎问盘突出症,2例为两节段腰椎间盘突出,均采用单枚PDN置人单个椎间盘间隙。对照组单纯髓核摘除术30例,22例为单节段腰椎间盘突出,8例为两节段腰椎间盘突出。观察两组病例的临床效果。结果 PDN组术后临床症状均消失,运动功能明显好转。6例获得9～22个月的随访,9例获得3～9个月的随访,椎间隙高度较手术前平均增加10．5％,无髓核假体移位突出,术后疗效明显优于单纯髓核摘除术组,两者相比差异有显著性（P〈0．01）。结论 PDN置换术既能恢复脊柱的节段稳定性,又保持脊柱节段的活动性,适当的假体设计与材料选择也能使椎间盘与椎体后柱的负荷获得再平衡,有广泛的应用前景。