伴颈椎后纵韧带骨化的颈脊髓损伤临床特点与疗效

目的探讨颈椎后纵韧带骨化（OPLL）患者外伤时脊髓损伤的临床特点及疗效。方法回顾性分析19例脊髓损伤患者OPLL骨化类型与颈髓NRIT2高信号变化范围、手术方式与手术前后脊髓功能变化的关系。结果伴OPLL的颈椎在较轻的外力作用下常可出现较严重脊髓损伤。伤后8h内行甲泼尼龙冲击治疗12例患者,2例死于并发症,10例患者脊髓功能明显改善。手术治疗17例,1例手术后27d死亡,16例患者术后半年颈髓功能Frankel评分改善。结论OPLL患者外伤后脊髓损伤的程度往往较重,骨化类型与NRI颈髓信号改变平面直接相关。甲泼尼龙冲击治疗、手术减压均有助于颈髓功能的恢复。     

双开门揭盖式椎板分块切除治疗严重颈椎后纵韧带骨化伴颈脊髓损伤

目的:评价双开门揭盖式椎板分块切除治疗严重颈椎后纵韧带骨化症(ossification of posterior longitudinal ligament,OPLL)伴颈脊髓损伤的临床疗效。方法:回顾性分析2012年6月至2014年6月治疗严重颈椎OPLL合并颈脊髓损伤38例患者资料,所有患者接受后路双开门揭盖式椎板分块切除减压内固定术,男25例,女13例;年龄42~78岁,平均58.2岁;35例有明确颈部外伤史,3例仅受轻微暴力(与颈部突然过伸有关)。术前颈部功能障碍指数(Neck Disability Index,NDI)19.8±4.4,术前日本矫形外科协会评分(Japanese Orthopaedics Score,JOA)为8.1±1.7;术前CT重建显示骨化韧带均分布在3个节段以上,椎管占位50%~85%,平均70.7%。结果:所有患者获得随访,时间10~24个月,平均15.6个月。手术时间90~150 min,平均120 min;出血量300~800 ml,平均(480±80)ml。末次随访时颈椎NDI和JOA评分分别为7.5±2.5和13.5±2.0,均较术前明显改善(P0.05)。术前颈椎前凸Cobb角为(8.10±2.70)°,末次随访时为(15.60±1.80)°,差异有统计学意义(P0.05)。术后发生深部感染1例,硬膜外血肿1例,C5神经根麻痹症状3例,轴性症状(axial symptom,AS)8例。无椎动脉损伤、神经症状加重、脑脊液漏、内固定失败等并发症。结论:颈椎后路双开门揭盖式椎板分块切除减压技术治疗重度颈椎OPLL合并颈脊髓损伤患者疗效良好,安全、可行,临床值得推广应用。     

Surgical management of cervical cord injury with ossification of the cervical posterior longitudinal ligament

Objective: To identify an appropriate surgical approach for the management of cervical cord injury with ossification of the posterior longitudinal ligament. Methods: A retrospective study of 25 cases of cervical cord injury with ossification of the posterior longitudinal ligament was performed. Two cases were classified as Frankel grade A, three as grade B, fourteen as grade C, and six as grade D. Treatment procedures consisted of anterior decompression with instrumentation (twelve patients), posterior decompression (eight patients), and combined anterior and posterior decompression (five patients). Results: There were no iatrogenic injuries of great vessels, trachea, esophagus or spinal cord. All patients were followed up for 15–86 months (average, 38.3 months). All segment with anterior fixation attained solid fusion, without implants loosening or breakage. No reclosed open‐door was found after posterior laminoplasty. Twenty‐one patients improved by one to two Frankel grades. The patients with complete spinal cord injury achieved no neurologic recovery, but did experience relief of upper limb pain or numbness. Conclusion: The surgical outcomes of cervical cord injury with ossification of the posterior longitudinal ligament were satisfactory. It is important to select a suitable surgical approach according to the findings on radiological imaging and the clinical characteristics and general condition of the patients.     

Laminoplasty versus conservative treatment for acute cervical spinal cord injury caused by ossification of the posterior longitudinal ligament after minor trauma

Background contextNo reports to date have accurately evaluated the management for acute spinal cord injury (SCI) caused by ossification of the posterior longitudinal ligament (OPLL) after minor trauma.PurposeTo assess whether outcomes of laminoplasty is better than conservative treatment.Study design/settingA retrospective study.Patient sampleThirty-one patients underwent surgery (L group) and 29 patients underwent conservative treatment (C group).Outcome measuresDisability, muscle strength, sensation, and general health status.MethodsPatients were managed according to routine clinical practice and the results between groups were compared. Clinical and radiographic outcomes were assessed at admission, discharge, 6 months and at the final visit. Causes for trauma, duration of hospital stay, and complication were also evaluated.ResultsCauses for trauma included falling, traffic accidents and sports. Mixed and segmental types were the most frequent cause of OPLL resulting into SCI. Duration of hospital stay and complications were less in the L group. Motor and sensory scores increased in the L group at discharge (p<.05) and at 6 months (p<.05), and maintained thereafter (p>.05); scores improved significantly in the C group at 6 months (p<.05), with a slight deterioration with time (p>.05); scores in the L group were higher than in the C group at each time point after surgery (p<.05). Bodily pain and mental health in SF-36 improved at discharge in the L group (p<.05); all scores improved at 6 months in both the groups (p<.05), with better improvements in the L group (p<.05). The canal diameter increased and occupation ratio decreased in the L group (p<.05), and maintained thereafter (p<.05); a slight increase of occupation ratio was observed in the C group (p>.05). Lordotic angle and range of motion were maintained in both the groups, with no significance between groups (p>.05). High-signal intensity decreased at 6 months (p<.05) in the L group; no significant change was found in the C group during the follow-up (p>.05); Significant difference was detected between the groups at 6 months and at the final visit (p<.05).ConclusionsMost of the OPLL patients displayed as incomplete SCI after minor trauma. Although spontaneous improvement of SCI without surgery is often observed, laminoplasty has more satisfactory outcomes, prevents late compression of cord, and reduces perioperative complications, although with no significant benefit in cervical alignment and range of motion.     

无脊髓压迫症状颈椎后纵韧带骨化患者的影像学特点及临床意义

目的:探讨无脊髓压迫症状颈椎后纵韧带骨化(OPLL)患者的影像学特点及临床意义。方法:分析42例无脊髓压迫症状颈椎OPLL患者初次就诊的影像学资料,男25例,女17例,年龄40～78岁,平均57岁。根据影像学表现对OPLL进行分型,观察椎管最大受压处骨化物占位率(OPLL占位率)与椎管最大受压节段活动范围(ROM)的相关性,同时观察MRI T2像上脊髓内信号的变化并随访患者症状进展情况。结果:根据Tsuyama分型标准,本组连续型24例,混合型10例,节段型8例。OPLL占位率20%～64%,平均38.4%;最大受压节段ROM平均4.5°。线性回归显示OPLL椎管占位率与ROM呈负相关(P<0.01)。所有患者未出现MRI T2相脊髓内信号改变。随访2年～5年6个月,平均3年8个月,所有患者末次随访查体均未发现脊髓压迫症临床表现。结论:无脊髓压迫症状的颈椎OPLL,以连续型骨化多见,椎管最大受压节段活动范围较小可能是其无脊髓压迫症状的原因之一。     

不同术式治疗无骨折脱位型伴后纵韧带骨化颈髓损伤的疗效分析

目的 分析不同术式治疗无骨折脱位型颈髓损伤伴后纵韧带骨化的疗效.方法 回顾性分析2000年2月至2009年1月收治的42例伴后纵韧带骨化无骨折脱位型颈髓损伤患者的临床资料,男26例,女16例;年龄49～78岁,平均60岁;受伤至就诊时间为4 h～11d,平均4 d.脊髓损伤程度按美国脊髓损伤协会(ASIA)分级:A级2例,B级8例,C级21例,D级11例.采用前路手术19例,后路手术13例,后前路联合手术10例.按照ASIA神经功能评分系统对患者术前、术后随访时的神经功能进行评分,并计算3种术式患者的感觉和运动功能改善情况.结果 所有患者均获随访,时间为13～87个月(平均34.2个月).所有患者脊髓功能获不同程度的改善,术后神经功能评分较术前均有提高,差异有统计学意义(P＜0.05).前路组、后路组及后前联合组3组术后感觉和运动功能恢复率分别为(53.12±0.94)%和(35.88±1.61)%、(40.41±2.33)%和(35.82±1.03)%、(43.97±4.74)%和(34.18±1.65)%.结论 3种术式可以不同程度地改善无骨折脱位型伴后纵韧带骨化颈髓损伤患者的脊髓功能,合理选择手术入路是取得良好疗效的关键.     

颈椎后纵韧带骨化症合并硬膜囊骨化的前路手术治疗

目的 探讨颈椎后纵韧带骨化症合并硬膜囊骨化的影像学表现、前路手术方法 及疗效.方法 2005年1月至2008年3月,前路手术治疗颈椎后纵韧带骨化症合并硬膜囊骨化患者13例.男11例,女2例;年龄43～72岁,平均53.6岁.骨化物分型:局限型3例,分节型2例,连续型5例,混合型3例;骨化物范围涉及1～5椎,平均2.8椎.患者均通过前路椎体次全切除术,切除骨化后纵韧带减压,术中6例患者后纵韧带骨化和硬膜囊骨化得以完全分离,硬膜囊保留完整,另7例患者硬膜囊出现不同程度撕裂或缺损.结果 8例患者术前CT横断面成像上表现为典型的"双影征",2例患者表现为整块骨化物存在中心低密度影,余3例患者表现为椎管狭窄率超过90%的严重后纵韧带骨化.术后5例患者并发脑脊液漏,其中3例经卧床休息、局部加压治疗3～5 d后愈合,另2例患者皮肤愈合后形成间歇性脑脊液囊肿,经反复穿刺抽液治疗1个月后痊愈.随访6个月～2年,平均1年,所有患者JOA评分从术前平均8.1分提高至术后平均13.2分,神经功能恢复率平均57.3%.骨化硬膜囊切除和未切除两组患者的神经功能恢复率差异无统计学意义.结论 CT三维重建检查有助于术前诊断后纵韧带骨化合并硬膜囊骨化,合并硬膜囊骨化并非前路手术的禁忌证,前路手术切除骨化后纵韧带、彻底减压是提高此类患者手术疗效的关键.     

胸椎后纵韧带骨化症的临床治疗研究进展

正后纵韧带骨化即多种因素导致的后纵韧带异位骨结构形成,可导致椎管、椎间孔容积减小,脊髓和/或神经根受压而产生脊髓损伤及神经根刺激症状,产生后纵韧带骨化症(OPLL),Tsukimoto等~([1])于1960年首次报道。OPLL多见于颈椎,胸椎次之~([2])。胸椎OPLL临床表现复杂,与颈椎病、腰椎病有相似之处,且可同时合并存在颈椎、腰椎病变,临床上易漏诊、误诊~([3])。Takenaka等~([4])的研究发现,上     

颈胸段后纵韧带骨化致椎管狭窄的手术治疗

后纵韧带骨化（OPLL）多见于东亚国家,病因和发生机制尚不完全清楚。单纯颈、胸椎手术报道多见,而颈胸段由于特殊的解剖结构,此处OPLL报道较少。我科自2006年7月至2008年10月收治了3例,现将治疗经过报告如下。     

颈椎后纵韧带骨化术后C5神经根麻痹

目的探讨颈椎后纵韧带骨化患者后路减压术后发生C5神经根麻痹的临床特点、病理机制及其危险因素。方法2000年1月至2005年8月，采用后路椎板切除减压及侧块钉棒（板）系统固定治疗颈椎后纵韧带骨化患者49例，男35例，女14例；年龄39-75岁，平均53．7岁。在术后6-64h，9例患者发生C5神经根麻痹，表现为患肢三角肌和（或）肱二头肌肌力下降，伴有肩部及上臂外侧感觉减退或消失。比较麻痹患者与非麻痹患者侧位X线片上颈椎前凸角度的变化、C4-5水平CT横断面上椎管狭窄率和MRI T2加权像脊髓高信号区改变的差异。结果9例C5神经根麻痹患者均接受保守治疗，治疗措施包括功能锻炼、口服药物及高压氧治疗。随访1-4年，平均2．2年，9例患者肌力均恢复至3-4级。麻痹患者颈椎曲度矫正值（12．5°±3．0°）大于非麻痹患者（1．9°±1．1°），差异有统计学意义（P=0．04）；麻痹患者椎管狭窄率（62．6％±6．8％）高于非麻痹患者（35．1％±5．4％），但差异无统计学意义（P=0．12）；麻痹患者术后仅有3例脊髓高信号区范围扩大而超过原椎间隙水平，与非麻痹患者脊髓高信号区改变的比例差异无统计学意义（P=0．32）。结论C5神经根麻痹在颈椎后纵韧带骨化患者中具有较高发生率，后路手术中应适度矫正颈椎前凸角度。     

Biomechanical study of the spinal cord in thoracic ossification of the posterior longitudinal ligament

Background

Ossification of the posterior longitudinal ligament (OPLL) in the thoracic spine produces myelopathy. This is often progressive and is not affected by conservative treatment. Therefore, decompressive surgery is usually chosen.

Objective

To conduct a stress analysis of the thoracic OPLL.

Methods

The three-dimensional finite element spinal cord model was established. We used local ossification angle (LOA) for the degree of compression of spinal cord. LOA was the medial angle at the intersection between a line from the superior posterior margin at the cranial vertebral body of maximum OPLL to the top of OPLL with beak type, and a line from the lower posterior margin at the caudal vertebral body of the maximum OPLL to the top of OPLL with beak type. LOA 20°, LOA 25°, and LOA 30° compression was applied to the spinal cord in a preoperative model, the posterior decompressive model, and a model for the development of kyphosis.

Results

In a preoperative model, at more than LOA 20° compression, high stress distributions in the spinal cord were observed. In a posterior decompressive model, the stresses were lower than in the preoperative model. In the model for development of kyphosis, high-stress distributions were observed in the spinal cord at more than LOA 20° compression.

Conclusions

Posterior decompression was an effective operative method. However, when the preoperative LOA is more than 20°, it is very likely that symptoms will worsen. If operation is performed at greater than LOA 20°, then correction of kyphosis by fixation of instruments or by forward decompression should be considered.     

Spinal cord cross-sectional area during flexion and extension in the patients with cervical ossification of posterior longitudinal ligament

Purpose

The pathomechanism of cervical myelopathy due to cervical ossification of posterior longitudinal ligament (C-OPLL) remains unclear. No previous literature has quantified the influence of dynamic factors on cervical myelopathy due to C-OPLL. The purpose was to investigate the influence of dynamic factors on the spinal column in the patients with C-OPLL using CT scan after myelography (MCT).

Methods

The study included 41 patients with cervical myelopathy due to C-OPLL. An MCT was done during neck flexion and extension, and spinal cord cross-sectional areas (SCCSA) were measured at each disc level between C2/3 and C7/T1. Ossification morphology at each segment was divided into three groups, connection department, coating part, and non-connection department of OPLL group. Dynamic changes of SCCSA in each group of ossification morphology were calculated. The relationship between clinical results and SCCSA at the narrowest level was investigated.

Results

MCT showed SCCSA changes during neck extension; 7.4 ± 5.1 mm² in the connection department, 5.8 ± 6.0 mm² in the coating part, and 6.7 ± 6.4 mm² in the non-connection department of OPLL group. There difference was not statistically significant. There was a weak correlation between the JOA score and SCCSA at the narrowest level (R = 0.49). There was no significant correlation between the recovery rate of JOA score and SCCSA at the narrowest level (R = 0.37).

Conclusion

Dynamic factors are seen both in cervical myelopathy patients with the continuous type of OPLL and others. Deterioration of myelopathy could be induced by motion effects even in the connection department of OPLL.     

石骨症并颈椎后纵韧带骨化1例报告

正石骨症又名Albers Schonberg病,是由破骨细胞数目减少或功能缺陷导致的一种以骨吸收障碍为主的罕见遗传性代谢性骨病,发生率约为1∶100 000,且具有一定的地区性~([1])。其典型的临床特征为骨密度增高、骨骼畸形~([2])。石骨症患者因骨脆性增加,骨组织弹性降低,骨折的发生率较高,且骨折后骨不愈合的发生率较高,因此既往文献主要涉及石骨症并四肢骨折的处理~([2])。又由于石骨症患者以骨吸收障碍为主,因此     

节段型严重颈椎后纵韧带骨化症前路、后路手术的疗效比较与选择策略

 目的 探讨前路和后路手术治疗节段型严重颈椎后纵韧带骨化症的疗效与选择策略。方法 2007年1月至2011年5月,手术治疗59例节段型严重颈椎后纵韧带骨化症患者,男41例,女18例;年龄43～73岁,平均55.7岁。24例行前路椎体次全切减压植骨融合内固定术,35例行后路全椎板减压侧块螺钉内固定术。比较两组患者的手术时间、出血量、整体和节段曲度变化、并发症等情况;采用日本骨科协会评分(Japanese Orthopaedic Association Scores,JOA)评估手术前后的神经功能并计算改善率。结果 所有患者随访12～18个月,平均15.4个月。前路手术组患者JOA评分术前平均为(7.33±1.09)分,末次随访时平均为(13.63±0.82)分,改善率为65.16%±7.50%;后路手术组患者JOA评分术前平均为(7.20±1.05)分,末次随访时平均为(12.23±1.11)分,改善率为51.46%±9.64%,两组间差异有统计学意义。手术部位的节段曲度术后即刻均较术前明显增加,前路手术组为5.38°±1.14°,后路手术组为3.89°±1.65°,差异有统计学意义。末次随访时颈部轴性症状发生率前路手术组为20.83%,后路手术组为51.43%,差异有统计学意义。结论 对于骨化范围在3个节段以内的严重后纵韧带骨化症患者,前路手术能直接去除压迫,神经功能恢复良好,并有效地恢复颈椎曲度,术后轴性症状发生率低;后路手术在减压同时应用侧块螺钉内固定,能较好地维持减压节段的曲度。     

胸椎后纵韧带骨化的临床特点及治疗策略

目的回顾研究手术治疗胸椎后纵韧带骨化症(OPLL)的临床特点及治疗方法。方法1991至2005年手术治疗胸椎OPLL55例,男19例,女36例;年龄35～73岁,平均51.9岁。均伴有脊髓损害。手术方式包括单纯椎管后壁切除术34例、前方OPLL切除减压术15例以及前后路联合手术6例。结果55例中36例(65.5%)合并胸椎黄韧带骨化(OLF),18例(32.7%)合并颈椎OPLL。单纯发生于上胸椎的OPLL13例(23.6%),中胸椎12例(21.8%),下胸椎及胸腰段17例(30.9%),广泛分布者13例(23.6%)。43例获得随访,平均随访时间47.1个月(6～168个月)。37例神经功能有改善,改善率为76.6%,无改善2例,加重4例。前方入路获随访者13例,其中3例症状加重,余改善率平均为82.9%(42.9%～100%)。后路椎管后壁切除术获随访者25例,1例无改善,1例加重,余改善率平均为72.6%(22.2%～100%)。前后路联合手术获随访5例,1例无改善,余改善率平均为83.9%。结论胸椎OPLL常合并胸椎OLF及颈椎OPLL。上胸椎OPLL合并颈椎管狭窄可一期行颈后路单开门及上胸椎椎管后壁切除术。两个节段以内的OPLL且不合并有造成脊髓压迫的胸椎OLF可行前路OPLL切除减压术,否则行后路椎管后壁切除术。单节段的OPLL合并胸椎OLF可行前后路联合手术。     

D-dimer monitoring combined with ultrasonography improves screening for asymptomatic venous thromboembolism in acute spinal cord injury

Objective: We compared screening methods for asymptomatic venous thromboembolism (VTE) in patients with acute spine and spinal cord injuries (SCI). Patients were screened by D-dimer monitoring alone (DS group) or by D-dimer monitoring combined with ultrasonography (DUS group).

Design: Prospective cohort study.

Setting: One department of a university hospital in Japan.

Participants: 114 patients treated for acute SCI between 2011 and 2017.

Interventions: N/A.

Outcome Measures: D-dimers were measured upon admission and 1, 3, 5, 7, and 14 days thereafter. DUS-group patients also underwent an ultrasound 7 days after admission. If ultrasonography indicated deep venous thrombosis (DVT), or if D-dimer levels increased to ≥?10?µg/mL, the patient was assessed for VTE, including DVT or pulmonary embolism (PE), by contrast venography. We analyzed the incidence of VTE detected in the DS and DUS groups.

Results: In the DS group, D-dimers were elevated (≥?10?µg/mL) in 15 of 70 patients (21.4%), and 9 of the 15 had asymptomatic VTE (12.9%, DVT 11.4%, PE 5.7%). In the DUS group, one patient developed VTE on day 4, and D-dimers were elevated in 13 of 43 patients (30.2%), ultrasonography indicated DVT in 12 patients (27.9%), and asymptomatic VTE was diagnosed in 12 patients (27.9%, DVT 27.9%, PE 4.7%). The DUS group had a higher incidence of DVT (P?=?0.002) and VTE (P?=?0.042) than the DS group.

Conclusions: Combined D-dimer and ultrasound screening in patients with acute SCI improved the detection of VTE, including PE, compared with D-dimer screening alone.     

超声骨刀与高速磨钻在颈椎后路全椎板切除减压手术应用中的比较研究

目的:比较超声骨刀和高速磨钻在颈椎后纵韧带骨化症伴椎管狭窄行后路全椎板切除减压手术中的安全性与有效性。方法:回顾分析2013年9月~2016年12月确诊为颈椎后纵韧带骨化伴椎管狭窄症行颈椎后路全椎板切除减压结合侧块/椎弓根螺钉内固定的患者53例。其中超声骨刀组(A组)24例,共切除椎板101个节段。高速磨钻组(B组)29例,共切除椎板124个节段。观察记录两组患者术中全椎板切除时间、手术过程中单节段椎板切除平均出血量、围手术期并发症(脊髓损伤、神经根损伤、硬膜囊损伤、脑脊液漏等),JOA评分及改善率。术后评估两组患者神经症状及并发症情况。结果:两组患者的年龄、性别比、术前JOA评分和减压节段数差异均无统计学意义(P0.05)。A组患者平均单个节段全椎板截骨时间为1.7±1.1min(1.4~3.3min),低于B组的2.9±1.8min(1.9~5.6min)(P0.05),手术过程中两组单节段椎板切除平均出血量为52.4±36.5ml(35.1~285.6ml)和60.3±34.2ml(41.1~281.4ml),两组比较无显著性差异(P0.05)。A、B组JOA评分分别由术前9.3±3.1分提高到术后12.7±2.0分和术前9.1±3.4分提高到术后12.9±2.8分,P0.05。两组患者术后JOA评分均明显优于术前(P0.05),但两组JOA改善率(分别为45.6%和51.2%)比较,差异无统计学意义(P0.05)。两组患者均未出现脊髓、神经根及硬膜囊损伤,无截骨操作相关并发症发生。结论:超声骨刀和高速磨钻均能安全有效地完成颈椎OPLL后路全椎板切除减压手术,在减轻术者工作强度、不增加出血及并发症的同时,超声骨刀能有效缩短全椎板切除时间。     

后纵韧带钩辅助下颈椎后纵韧带骨化物切除减压术

目的探讨后纵韧带钩辅助下颈椎后纵韧带骨化物前路切除的适应证、方法及其临床效果。方法患者19例,男14例,女5例;年龄51-71岁,平均59岁。术前影像学检查结果示后纵韧带骨化物局限型6例,分节型13例;椎管狭窄率32％-75％,平均54％。术前神经功能JOA评分4-14分,平均9．6分。行颈前路常规手术入路,椎体开槽切骨达椎体后壁,范围超过后纵韧带骨化灶。利用后纵韧带钩插入后纵韧带下,钩起后纵韧带及骨化物,在后纵韧带与硬膜间形成一间隙,直视下用超薄型枪状咬骨钳切除后纵韧带及骨化物,而后植骨固定,恢复颈椎稳定性。结果随访6-36个月,平均16个月。术后JOA评分8～16分,平均12．8分,恢复率42％＇-92％,其中疗效优9例,良7例,可3例,优良率84．2％。4例患者术后并发脑脊液漏,保守治疗后均获得痊愈。术后CT和MR检查显示骨化后纵韧带切除完全,脊髓和硬膜囊形态恢复良好。结论后纵韧带钩可提高颈椎前路手术切除后纵韧带骨化物的安全性和有效性,适用于局限型和分节型、切除范围在两个椎节之间的颈椎后纵韧带骨化症患者。     

T1倾斜角对颈椎后纵韧带骨化患者后路单开门椎板成形术后颈椎曲度的影响

目的评价T_1倾斜角对颈椎后纵韧带骨化(ossification of posterior longitudinal ligament,OPLL)患者颈椎后路单开门椎板成形术后颈椎曲度的影响。方法选取2014年1月—10月,因颈椎OPLL接受颈椎后路单开门椎板成形术病例38例,男20例,女18例;年龄44~75岁,平均53.3岁,随访5.1~6.6个月,平均6.0个月;手术节段C3~6 18例,C3~7 12例,C4~7 8例。记录术前和随访时疼痛视觉模拟量表(visual analogue scale,VAS)评分、日本骨科学会(Japanese Orthopaedic Association,JOA)评分,计算VAS、JOA评分改善率。通过X线片测量术前T_1倾斜角、术前和随访时C2~7 Cobb角及颈椎活动度(range of motion,ROM),计算C2~7 Cobb角改变值,即颈椎曲度改变值。运用SPSS 18.0软件分析数据,以明确T_1倾斜角与颈椎曲度改变之间的相关性。结果根据T_1倾斜角中位数将病例分为2组,2组病例之间性别、年龄、手术节段、随访时间、术前和随访时颈椎ROM、随访时Cobb角、VAS评分改善率及JOA评分改善率差异均无统计学意义(P0.05)。T_1倾斜角与随访时颈椎曲度改变明显相关,较大T_1倾斜角组(T_1倾斜角≥26.9°,n=19)病例在随访时的颈椎曲度改变明显高于较小T_1倾斜角组(T_1倾斜角26.9°,n=19),差异具有统计学意义(P0.05)。结论对于具有较大T_1倾斜角的OPLL病例,颈椎后路单开门椎板成形术后颈椎曲度丢失的风险有可能增加,提示在拟行颈椎后路单开门手术或其他颈椎后路术式之前,在考虑患者颈椎Cobb角等评估因素的同时,也应将T_1倾斜角作为一项重要考虑因素。