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1.
青少年特发性脊柱侧凸患者骨密度变化的分析   总被引:16,自引:8,他引:8  
目的 :探 讨青 少年 特 发性 脊柱 侧 凸患 者的 骨 密度 变化 规 律。方 法:应用 双 能 X 线骨 密 度吸 收仪 测 定 101例特 发 性 脊 柱侧 凸 患 者 腰椎 (L2 ̄L4)和 股 骨 近 端 (股 骨 颈 、大 转 子 、W ard's 三 角 )的 骨 密 度 ,结 合 脊 柱 侧 凸 严 重程度 进行 分 析,并 与 62名 同 年龄 段正 常 青少 年骨 密 度进 行比 较 。结 果:特发 性脊 柱 侧凸 患者 所 测各 部位 的 骨密度均 明显 低 于正 常对 照 组(P<0.05),腰 椎 骨 密 度的 降 低 比 股骨 明 显 ,股 骨 近 端 的三 个 部 位 ,以 W ard's 三 角的 骨密度 降低 尤 为显 著。有 75.2% 的 特发 性脊 柱 侧凸 患者 发生 骨 密度 降低 ,其 中 26.7% 发 生骨 量 减少 , 48.5% 符 合骨质疏 松症 的 诊断 标准 ;但 其骨 密 度的 降低 程 度与 侧凸 严 重程 度无 明 显相 关性 。 结论 :青 少年 特 发性 脊 柱 侧凸 患者存 在着 骨 密度 的降 低 ,其与 侧 凸的 严重 程 度无 关,可能 与 特发 性脊 柱 侧凸 的发 病 机理 有关 。  相似文献
2.
目的:研究青少年特发性脊柱侧凸(AIS)患者侧凸区椎间盘不同部位纤维环Ⅰ型、Ⅱ型胶原的分布,探讨胶原分布异常在AIS发生发展中的作用。方法:顶椎为腰椎的AIS患者共27例(AIS组),同时选15例同年龄段先天性脊柱侧凸(CS)患者为对照(CS组)。在脊柱侧凸前路手术时取L1/2或L2/3椎间盘。AIS组取材节段为侧凸顶椎区,CS组则为侧凸的下终椎区。采用胃蛋白酶-乙酸(0.5mol/L)体系提取胶原组织,SDS-聚丙烯酰胺凝胶电泳法及抗原抗体Western印记法进行胶原的分类和定量测定。在GelWork图像分析系统中进行泳道的对比定量分析。分别计算AIS组凹侧、凸侧和CS组纤维环中Ⅰ型、Ⅱ型胶原含量,并进行统计学分析。结果:AIS组患者纤维环中Ⅰ型、Ⅱ型胶原的含量在凹侧明显低于凸侧,有显著性差异(P<0.05),而且凹、凸侧胶原含量的差异与侧凸Cobb角有明显的相关。AIS组Ⅰ型、Ⅱ型胶原的含量比CS组也有显著下降(P<0.01)。结论:AIS椎间盘纤维环存在胶原代谢异常,AIS凹侧纤维环Ⅰ型、Ⅱ型胶原明显低于凸侧,且随Cobb角的增大差值越明显,提示椎间盘胶原代谢异常可能和AIS的发生发展有密切的联系。  相似文献
3.
目的:了解青少年特发性脊柱侧凸(adolescentid iopathic scoliosis,AIS)患者褪黑素信号传导通路是否存在异常。方法:7例女性AIS患者,年龄13~17岁,平均14.7岁;最大Cobb角40°~80°,平均59.3°,行后路手术时取髂骨组织进行成骨细胞培养,并用碱性磷酸酶染色、骨钙素免疫荧光检测方法对培养细胞进行成骨细胞鉴定。取原代培养的成骨细胞,先采用福斯可林刺激成骨细胞内cAMP升高,然后用不同浓度褪黑素刺激细胞,检测细胞内cAMP水平。结果:碱性磷酸酶染色、骨钙素免疫荧光检测结果均证实所培养细胞表现为成骨细胞特性,所有AIS患者成骨细胞的cAMP的基础水平都很低,在给予福斯可林刺激以后cAMP的水平明显升高,此后再给予生理剂量的褪黑素后,cAMP的水平未见明显下降;给予药理剂量的褪黑素后同样没有观察到cAMP水平明显的下降。结论:AIS患者的褪黑素信号传导通路存在异常。  相似文献
4.
目的:探讨采用单纯后路广泛松解技术联合侧凸全节段椎弓根螺钉系统治疗青少年特发性胸腰椎和腰椎脊柱侧凸的疗效。方法:我院于2002年4月至2005年7月连续收治了114例(女86例,男28例)青少年特发性胸腰椎和腰椎脊柱侧凸患者,其中Lenke5型72例,Lenke6型32例,Lenke3C型10例。全部采用后路广泛松解技术联合椎弓根螺钉系统治疗。手术前后在X线正侧位片上测量冠状位Cobb角,矢状面胸椎后凸角和腰椎前凸角,最下端融合椎冠状面成角,骶骨中垂线与融合下端椎、顶椎及C7中垂线平均距离,并观察各种并发症情况。结果:共置入1460枚椎弓根螺钉,平均融合9.6个椎体(5~14个)。冠状面平均矫正率为78.6%(61°减少到13°),矢状面腰椎前凸角从36°(23°~67°)增加到42°(34°~55°)。最下端融合椎冠状面成角矫正率达79%,骶骨中垂线与融合下端椎距离从2.3cm减少到0.5cm,与顶椎距离从5.0cm缩短到1.6cm;C7中垂线与骶骨中垂线距离由2.7cm减少到0.8cm。术后平均随访时间为30个月(12~50个月),未发现假关节形成、深部感染,且无明显矫形丢失。结论:后路广泛松解联合全节段椎弓根螺钉系统治疗青少年特发性胸腰椎/腰椎侧凸效果满意。  相似文献
5.
目的探讨青少年特发性脊柱侧凸患者雌激素受体基因多态性与骨密度的关系。方法取青少年特发性脊柱侧凸女性患者92例,年龄10~19岁,Cobb角25°~134°,应用聚合酶链反应限制性片段长度多态(PCRRFLPs)的方法分析雌激素受体基因型,同时用双能X线骨密度吸收仪分别对其腰椎(L24)和股骨近端(股骨颈、大转子、Wards三角)的骨密度进行测量。结果特发性脊柱侧凸患者雌激素受体基因型PvuⅡ多态性PP,Pp,pp型分别为19.6%,46.7%,33.7%,XbaⅠ多态性XX,Xx,xx型分别为22.8%,33.7%,43.5%;XX型的腰椎、股骨大转子和Wards三角的骨密度明显低于xx型(P<0.05),而PvuⅡ基因的各基因型与骨密度无关;联合分析PvuⅡ和XbaⅠ位点,PPXX基因型的腰椎、股骨大转子和Wards三角的骨密度明显低于Ppxx和ppxx型(P<0.05)。结论雌激素受体XbaⅠ基因多态性与特发性脊柱侧凸患者的骨密度有关,PPXX基因型的骨密度较低,有助于较早发现特发性脊柱侧凸的低骨量者。  相似文献
6.
Generalized low bone mass has been well documented in patients with adolescent idiopathic scoliosis (AIS). However, studies linking calcium-intake (CA), weight-bearing physical-activity (PA) and bone mass of AIS are lacking. We aimed to study the relationship between CA, PA and bone mass in AIS girls and compared to those of healthy non-AIS controls during the peripubertal period. Newly diagnosed AIS girls (n=596) aged 11–16 years with Cobb angle 10° were recruited to compare with age-matched healthy girls (n=302) in a cross-sectional study. Anthropometric parameters, pubertal status, CA and PA were assessed. Areal bone mass of lumbar spine and femoral neck, and volumetric bone mass of distal radius and tibia were determined by dual-energy X-ray absorptiometry and peripheral quantitative computed tomography, respectively. The results showed that weight and body mass index (BMI) of AIS were lower than the controls (P<0.05). Corrected height and arm span of AIS were longer than those of controls from 13 years onwards (P<0.02). Median CA of AIS was <410 mg/day across the ages and did not differ from the controls (P=0.063). Median PA of AIS (1.6 h/day) was lower than the controls (1.8 h/day) (P=0.025). Bone mass of AIS was on average 6.5% lower than controls across the ages (P<0.05). CA and PA were significantly correlated with bone mass of AIS (P<0.04). Multivariate analysis showed that AIS in girls was associated with lower bone mass, and that both CA and PA were independent predictors of bone mass in AIS. In conclusion, AIS girls were found to have lower body weight and BMI, longer segmental lengths and generalized low bone mass. Inadequate calcium intake and weight-bearing physical activity were significantly associated with low bone mass in AIS girls during the peripubertal period. The importance of preventing generalized osteopenia in the control of AIS progression during the peribubertal period warrants further study.  相似文献
7.
Generalized osteopenia and spinal deformity occur concomitantly in adolescent idiopathic scoliosis (AIS) during the peripubertal period. No large-scale study has been performed to reveal the link between scoliotic deformity and bone-mineral status in AIS. In a cross-sectional study, the extent of scoliotic-curve severity in relation to bone-mineral status was examined for 619 AIS girls and compared with those of 300 healthy non-AIS counterparts aged 11–16 years. Curve severity was categorized into a moderate (10–39°) and a severe group (40°) based on Cobb angle. Anthropometric parameters, bone mineral-density (BMD) and bone mineral-content (BMC) of lumbar spine, proximal femur and distal tibia were determined by dual-energy X-ray absorptiometry and peripheral QCT. Differences in anthropometric parameters and bone mass among control and the AIS-moderate and AIS-severe groups were tested by one-way ANOVA. Association between Cobb angle and bone mass was determined by univariate and multivariate analyses. Mean Cobb angle of the moderate and severe groups were 25±6.3° and 50.2±11.3°, respectively. Arm span and leg length among the moderate and severe AIS subjects were almost all longer than for the controls from age 13 years. Age-adjusted arm span and leg length were significantly correlated with curve severity ( p <0.015). Starting from age 13 years, most axial and peripheral BMD and BMC of the moderate or severe AIS group was significantly lower than for the controls ( p <0.029). Age-adjusted Cobb angle was inversely correlated with BMD and BMC of the distal tibia and lumbar spine among AIS subjects ( p 0.042). The proportion of osteopenic AIS girls in the severe group was significantly higher than that in the moderate group ( p 0.033). Multivariate analysis indicated that Cobb angle was inversely and independently associated with axial and peripheral BMD and BMC ( p 0.042). To conclude, curve severity was an inverse and independent associated factor on bone mineral mass of AIS during peripuberty. The study implied that prevention of osteopenia could be as important as controlling spinal progression in the management of AIS.  相似文献
8.
With the advent of thoracoscopy, anterior release procedures in adolescent idiopathic scoliosis (AIS) have come into more frequent use, however, the indication criteria for an anterior release in thoracic AIS are still controversial in the literature. To date, few studies have assessed the influence on spinal flexibility and no study has so far been able to show a beneficial effect on the correction rate as compared to a single posterior procedure. The objective of this study was to evaluate the influence of thoracic disc excision on coronal spinal flexibility. Six patients (5 females, 1 male) with AIS and a mean age of 15.6 years (range 13–20 years) underwent an open anterior thoracic release prior to posterior instrumentation. Cotrel dynamic traction along with radiographs of the whole spine including traction films were conducted pre- and postoperatively and were evaluated retrospectively. The mean preoperative thoracic curve was 89.7° ± 15.4° (range 65°–110°). The flexibility rate in Cotrel traction was 22.8 ± 8.1%. After performance of the anterior release the thoracic curve showed a mean increase of coronal correction by 5.5° ± 5.0° as assessed by traction radiographs. The flexibility index changed by 6.2 ± 5.6%. After posterior instrumentation the thoracic curve was corrected to a mean of 36.5° ± 10.1° (correction rate 59.6%). Disc excision in idiopathic thoracic scoliosis only slightly increased spinal flexibility as assessed by traction films. In our view a posterior release with osteotomy of the concave ribs (concave thoracoplasty, CTP) is more effective in increasing spinal flexibility. According to our clinical experience, an anterior release prior to posterior instrumentation in AIS should only be considered in hyperkyphosis, coronal imbalance or massive curves.  相似文献
9.
目的:观察双侧椎弓根交叉间隔置钉矫形治疗Lenke 1型青少年特发性脊柱侧凸(AIS)的临床疗效。方法:2007年1月~2008年12月采用后路双侧椎弓根交叉间隔置钉矫形手术治疗Lenke 1型AIS患者36例,其中男7例,女29例,年龄11~18岁,平均15.3岁,术前胸椎侧凸角度均<75°,且侧凸柔韧性均>50%。测量术前和术后冠状面主胸弯Cobb角、胸椎矢状面Cobb角、C7铅垂线与骶骨正中线(CSVL)的距离、C7铅垂线与S1椎体后上角的垂直距离、双侧肋骨后凸的高度差(RH)、顶椎上下横突侧方5个肋间距总和的左右侧差值(ARSD)、胸弯顶椎椎体外侧缘至两侧胸壁距离的比值(AVB-R),分析临床疗效。结果:手术时间150~240min,平均176min;术中失血量460~1100ml,平均840ml。术中无脊髓、重要神经及血管损伤,1例患者术后出现左侧胸腔积液,2例患者术后2周出现伤口浅表感染。随访1.6~3.2年,平均2.06年。主胸弯冠状面Cobb角由术前56.7°±8.0°矫正为14.1°±6.0°(P<0.05),末次随访(17.2°±3.2°)与术后比较无显著性差异(P>0.05)。胸椎矢状面Cobb角由术前的28.9°±7.9°减小为21.9°±10.6°(P<0.05),末次随访(24.3°±5.1°)与术后比较无显著性差异(P>0.05)。矢状面C7铅垂线与S1椎体后上角的垂直距离由术前-11.7±12.1mm变为术后-1.4±9.4mm(P<0.05),末次随访(-2.7±4.7mm)与术后比较无显著性差异(P>0.05)。RH、ARSD、AVB-R术前分别为37.7±5.8mm、20.1±6.6mm和1.56±0.16,术后分别为19.3±6.9mm、8.1±4.7mm和1.22±0.20,差异有显著性(P<0.05)。C7铅垂线与CSVL的距离术前、术后及末次随访无显著性差异(P>0.05)。随访期间未发现内固定失败征象。结论:双侧椎弓根交叉间隔置钉矫形治疗柔韧性好的轻中度Lenke 1型AIS可以获得良好的三维矫形效果。  相似文献
10.
Large and stiff thoracic scoliotic curves in the adolescent represent a classic indication of anterior release followed by posterior instrumentation. However, third-generation segmental spinal instrumentations have shown increased correction of thoracic curves. Indication for an anterior release may therefore not be required even in large and stiff thoracic curves. The objective of the study was, therefore, to analyze retrospectively the results of third-generation segmental posterior instrumentation in large and stiff thoracic curves and to compare our results with the current literature of anterior release followed by posterior instrumentation. An independent observer, who had not participated in any of the case, reviewed our electronic database of adolescent scoliosis surgery (Scolisoft) with the following query: thoracic curves, Cobb angle between 70° and 90° and posterior surgery only. He was able to identify 19 patients whose thoracic curves were measured between 70° and 90°. Out of these, four had convex-side bending Cobb angle values of less than 45° and were not included in the study, as they were judged too flexible. Fifteen patients (aged 11–18 years, mean 13.6 years) with thoracic scoliosis were left for the study (average Cobb angles 78.5° with a flexibility index of 32.5% (range, 19–42%). The mean follow-up period was 32 months (range 18–64 months). Classic parameters of deformity correction were analysed. The average operative time was 314 min and the mean total blood loss was 1,875 ml. Average level of instrumented vertebrae was 12 (Range, 10–14). Postoperatively, the thoracic Cobb angle was measured at 34.8° (range, 25–45°), which represents a correction rate of 54% (range, 40.0–67.1%) and remained unchanged at the last follow-up (35°). Patients with thoracic hypokyphosis improved from an average 11° to 18°. There were three complications (one excessive bleeding, one early infection and one late infection). One case showed an add-on phenomenon at the last follow-up. Coronal balance was improved from 1.8 cm (Range 0–4cm) down to 0.75 cm (range 0–2.5 cm). Shoulder balance was improved from 1.3 cm (range 0–4cm) down to 0.75 (0–2.5 cm). All patients reported satisfactory results except the patient with an adding-on phenomena. In the literature, most of the results of anterior thoracoscopic release and posterior surgery give a percentage of Cobb angle correction similar or inferior to our series for an average initial Cobb angle of less magnitude. Therefore, with adequate posterior release, and the use of third-generation segmental instrumentation there is no need for anterior release even for curves in the 70 –90° range.  相似文献
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