髋部脆性骨折病人股骨近端几何形态CT评估

目的探讨CT对股骨近端几何形态的评估价值,以及股骨近端几何形态与髋部脆性骨折的相关性。方法对33例股骨颈骨折和38例粗隆间骨折老年妇女,应用CT扫描股骨近端,并测量颈干角、股骨颈轴长、股骨头直径和股骨颈直径。结果在不同骨折组间,颈干角差异有显著相关性(P<0.01)。股骨颈轴长、股骨头直径与股颈直径呈正相关(P均<0.01),在不同的骨折组间三者差异没有显著相关性(P>0.05)。结论利用CT分析股骨近端几何形态,操作简单、精确性高。颈干角与髋部骨折的类型有显著相关性,颈干角越小易发生股骨颈骨折,而颈干角越大更易发生粗隆间骨折。     

老年股骨上段标本几何参数及骨密度与生物力学性能的相关性分析

目的 探讨股骨颈部几何因素及骨密度对髋部骨折的影响,通过生物力学试验研究髋部生物力学性能与二者的关系.方法 随机选取16例甲醛浸泡国人成年男性尸体股骨上段标本,测量其几何参数(包括股骨颈长、股骨颈直径、股骨头直径及颈干角)和骨密度,再通过生物力学试验,比较各因素对股骨颈生物力学特性的影响.结果 转子间骨密度、股骨颈骨密度及股骨头直径与股骨的生物力学特性有明显的相性(r=0.792,r2=0.628,P0.001;r=0.749,r2=0.560,P=0.001;r=0.706,r2=0.499,P=0.002);逐步线性回归分析结果显示转子间骨密度、股骨头直径和股骨颈直径相结合是预测髋部骨折的最好方法(r2=0.844,P＜0.001).结论 骨密度值结合股骨近端几何参数能提高对骨质疏松性髋部骨折的预测.     

骨密度结合股骨近端几何参数预测老年髋部骨折

目的研究老年人骨密度(Bone mineral density,BMD)值结合股骨近端几何参数是否能提高骨质疏松性髋部骨折危险性的预测。方法将85例绝经后妇女髋部骨折患者按骨折类型分组, 其中52例股骨颈骨折,33例转子间骨折。对照组100例老年女性。在骨盆片上测量股骨近端几何参数,在股骨颈、Ward’s三角和转子处测量BMD值,对结果进行统计学处理分析。结果骨折组的BMD值均低于对照组(P<0．01);股骨干皮质厚度与股骨颈BMD值有相关性(r=0．45,P< 0．01);逐步线性回归分析结果显示股骨距内侧皮质厚度、转子处BMD值、颈干角和Ward’s三角 BMD值相结合是预测髋部骨折最好方法(r=0．74,r2=0．53,P<0．01)。结论骨密度值结合放射学测量股骨近端几何参数能提高对骨质疏松性髋部骨折及骨折类型的预测。     

骨质疏松女性股骨颈骨折与股骨转子间骨折的髋部骨密度差异分析

目的明确骨质疏松女性股骨颈骨折与股骨转子间骨折的髋部骨密度差异,探讨骨质疏松患者发生髋部骨折(股骨颈骨折、股骨转子间骨折)与骨折部位骨密度的相关性。方法回顾性分析2015年1月1日至2016年12月31日期间于福建省某三级甲等医院的住院治疗的骨质疏松及髋部骨质疏松性骨折患者172例,其中无病史的原发骨质疏松患者109例、骨质疏松性股骨颈骨折患者39例、骨质疏松性转子间骨折24例。分别统计3组患者年龄、体质指数、糖尿病患病情况、骨折侧别、髋部各部位骨密度、血清Ⅰ型胶原交联C末端肽(C-terminal crosslinking telopeptide of type Ⅰ collagen,CTX)、Ⅰ型原胶原N-端前肽(procollagen type ⅠN propeptide,PINP)、25羟基维生素D(25-OH-D)。分别进行三组间及两两组间比较。结果三组间年龄、体质指数、糖尿病患病率差异无统计学意义(F=2.667,P=0.072; F=0.882,P=0.416;χ~2=3.216,P=0.232),股骨颈骨折组与股骨转子间骨折组组间骨折侧别差异无统计学意义(χ~2=0.958,P=0.328),三组间髋部Ward区骨密度差异无统计学意义(F=2.937,P=0.056),髋部骨密度比较,股骨颈、股骨大转子、股骨转子间、髋部整体差异有统计学意义(F=7.825,P=0.001; F=8.668,P0.001; F=9.657,P0.001)。股骨颈骨折组、转子间骨折组股骨颈、股骨大转子、股骨转子间、髋部整体骨密度均小于骨质疏松组,差异均有统计学意义(P0.05);股骨颈骨折组与转子间骨折组股骨颈、大转子、转子间、髋部整体骨密度差异均无统计学意义(P0.05)。三组间β-CTX、P1NP、维生素D差异均有统计学意义(P0.05)。股骨颈骨折组、转子间骨折组β-CTX、维生素D均小于骨质疏松组,差异均有统计学意义(P0.05);转子间骨折与骨质疏松组P1NP差异无统计学意义,股骨颈骨折组与转子间骨折组股骨颈、大转子、转子间、髋部整体骨密度差异均无统计学意义(P0.05)。结论女性骨质疏松患者发生髋部骨折的类型可能并不取决局部的骨密度,可能与骨微结构等因素相关,要得到明确、可靠的结果仍需进一步研究证实。     

骨密度结合股骨颈颈干角对各型髋部骨质疏松性骨折风险的预测

目的：探讨股骨近端骨密度和股骨颈颈干角与髋部骨质疏松性骨折的相关性。方法收集在我院住院的髋部骨折患者100例和健康老年对照组100例,采用美国GE公司生产的LUNAR-Bravo双能X线骨密度仪及其配置的高级骨科专用分析测量软件,分析股骨近端骨密度和股骨颈颈干角与骨质疏松的相关性。结果髋部骨折组与对照组比较,髋部骨折组BMD较对照组有明显下降,股骨外侧皮质骨厚度明显减小,股骨颈干角（ NSA）较对照组钝。结论髋部骨密度结合股骨颈颈干角变化特点可以提高对各型髋部骨质疏松骨折危险性的预测。     

老年髋部骨折类型与股骨近端骨密度的关系

目的探讨老年股骨颈骨折与转子间骨折患者在股骨近端骨密度(BMD)上的不同特点。方法回顾性研究520例60岁及60岁以上初次髋部骨折患者:股骨颈骨折237例,男67例,平均年龄80.0±8.5岁,女170例,平均年龄79.0±8.2岁;转子间骨折283例,男95例,平均年龄80.2±8.4岁,女188例,平均年龄82.4±6.7岁。比较两种髋部骨折患者健侧股骨近端五个区域(股骨颈、大转子、转子间、全髋部、Ward区)的BMD,并采用二分类logistic回归分析探讨股骨近端不同区域BMD与髋部骨折类型之间的关系。结果男性转子间骨折患者只有大转子BMD显著低于同性股骨颈骨折患者,差异有统计学意义(P0.01);而女性转子间骨折患者大转子、转子间、全髋部、Ward区的BMD显著低于同性股骨颈骨折患者,差异均有统计学意义(P0.01)。女性按年龄分层后,60~69岁转子间骨折患者只有Ward区BMD显著低于股骨颈骨折患者,差异有统计学意义(P0.05);70~79岁转子间骨折患者五个区域BMD均显著低于股骨颈骨折患者,差异有统计学意义(P0.05);大于79岁转子间骨折患者只有大转子BMD显著低于股骨颈骨折患者,差异有统计学意义(P0.01)。二分类Logistic回归分析发现:女性中增龄、大转子、转子间、全髋部以及Ward区的BMD与髋部骨折类型存在统计学关联(P0.01),而男性中只有大转子BMD与髋部骨折类型存在统计学关联(P0.01)。结论股骨颈骨折患者和转子间骨折患者存在不同的BMD水平,女性股骨近端BMD与髋部骨折类型的关系随着年龄的变化而变化。     

中老年股骨转子间骨折患者股骨近端解剖参数的性别和年龄差异研究

目的比较中老年股骨转子间骨折患者股骨近端解剖参数的性别和年龄差异,以期为内固定器械的研发提供理论支持。方法回顾性分析2009年9月至2017年3月期间解放军总医院第一医学中心骨科收治的375例股骨转子间骨折患者资料。按不同年龄段将患者分为4组:中年(45~59岁)组22例,男16例,女6例;老年前期(60~74岁)组87例,男37例,女50例;老年(75~89岁)组238例,男76例,女162例;长寿老年(≥90岁)组28例,男6例,女22例。通过影像学资料测量患者的股骨颈前倾角、股骨颈干角、股骨头直径、股骨颈长度、股骨颈偏移量及股骨颈宽度。比较同一组内不同性别之间及同一性别不同组别之间患者股骨近端解剖参数的差异。结果男性与女性中老年股骨转子间骨折患者的体重指数和骨折AO分型比较差异均无统计学意义(P>0.05),具有可比性。中老年男性股骨转子间骨折患者的股骨颈前倾角(8.33°±5.00°)显著小于女性患者(11.28°±6.15°),股骨头直径、股骨颈长度、股骨颈偏移量、股骨颈宽度[(49.10±2.48)、(99.70±5.22)、(7.18±2.20)、(39.10±4.92)mm]显著大于女性患者[(43.46±2.79)、(90.00±4.75)、(6.29±2.07)、(33.49±4.87)mm],差异均有统计学意义(P<0.05)。中年组、老年前期组、老年组、长寿老年组男性患者股骨头直径、股骨颈长度、股骨颈宽度显著大于女性患者,老年前期组、老年组、长寿老年组男性患者股骨颈前倾角显著小于女性患者,老年组男性患者股骨颈偏移量显著大于女性患者,差异均有统计学意义(P<0.05)。同一性别不同组之间患者的股骨颈前倾角、股骨颈干角、股骨头直径、股骨颈长度、股骨颈偏移量及股骨颈宽度比较差异均无统计学意义(P>0.05)。结论与中老年男性相比,中老年女性股骨转子间骨折患者的股骨颈前倾角偏大,股骨颈偏移量、宽度、长度及股骨头直径偏小。中老年股骨转子间骨折患者股骨近端的解剖参数无明显年龄差异。     

骨折部位对术后并发深静脉血栓的影响

目的探究不同骨折部位对深静脉血栓发生率的影响,以期对不同骨折部位深静脉血栓的发生提供针对性的预防建议。方法选取2005年5月至2015年8月于我院接受治疗的创伤骨科住院患者2 405例,回顾性分析统计所有患者的详细病历资料,主要包括个人临床资料、骨折发生部位、骨折诱因、是否继发深静脉血栓、深静脉血栓发病时间、合并症等情况,并记录患者不同骨折部位的深静脉血栓发病率。结果 2005年5月至2015年8月,我院共接受治疗的创伤骨科住院且符合研究标准的患者2 405例,154例发生深静脉血栓,发病率为6.40%。髋周骨折患者深静脉血栓发生率为12.33%,明显高于下肢骨折的5.91%与上肢骨折患者的0.86%,差异具有统计学意义(P<0.05)。上肢骨折各部位深静脉血栓发病率比较,差异无统计学意义(P>0.05)。股骨颈、股骨转子间骨折患者深静脉血栓发病率为12.87%,明显高于骨盆、髋臼骨折患者的7.58%,差异具有统计学意义(P<0.05)。股骨髁骨折患者深静脉血栓发病率为25.00%,明显高于下肢其他骨折部位患者,差异具有统计学意义(P>0.05)。对不同骨折部位进行哑变量赋值,在多因素分析中,股骨颈、股骨转子间骨折(OR=2.942),骨盆、髋臼骨折(OR=1.993),股骨干骨折(OR=1.838),股骨髁骨折(OR=3.012),髌骨骨折(OR=3.522),胫骨近端骨折(OR=1.050)是患者发生深静脉血栓的显著风险因素(P<0.05)。结论股骨颈、股骨转子间骨折、骨盆、髋臼骨折,股骨干骨折,股骨髁骨折,髌骨骨折,胫骨近端骨折患者发生深静脉血栓的风险较高,临床中应针对性地做好相应预防。     

老年股骨颈骨折骨密度、Singh指数的研究

目的研究骨密度和Singh指数在衡量股骨近端骨强度和预测股骨颈骨折中的意义.方法对21名60岁以上、因轻度创伤所致新鲜股骨颈骨折老年人进行股骨近端骨密度、Singh指数及Ward三角矿化骨体积进行测量.结果本组患者股骨近端骨密度减少规律,Ward三角>股骨颈>股骨粗隆,骨密度减少的下限(±s)是股骨颈1.14SD、粗隆部0.35SD、Ward三角2.04SD;Singh指数4级以下(含4级)20名(95.2%);Singh指数与MBV呈正相关(r=0.517P<0.05),与粗隆部骨密度及减少的标准差呈正相关(r=0.457,0.474P<0.05).结论骨密度较峰值骨量减少的标准差数在股骨颈大于1.14、粗隆部大于0.35、Ward三角大于2.04,加上Singh指数低于4级(含4级)提示股骨颈骨折的危险性明显增高.     

3型伽马钉治疗老年股骨转子间骨折

[目的]探讨3型伽马钉(γ-3)治疗老年股骨转子间骨折的临床疗效。[方法]回顾性分析用γ-3治疗122例老年股骨转子间骨折的临床疗效,平均年龄77.6岁,91.8%合并股骨近端严重骨质疏松,术中牵引复位,微创置入γ-3,术后进行骨质疏松治疗,对比术后即刻及随访期末的颈干角及尖顶距,并行Harris髋关节功能评分。[结果]随访时间平均14.2个月(12~18个月),平均住院时间11.4 d,平均手术时间54 min,患肢完全负重及骨折愈合时间平均11.2周,Harris髋关节功能评分平均86.1分,其中优60例,良52例,可10例,共9例发生术后并发症。术后次日所测股骨颈干角及尖顶距与随访期末所测值之间差异无统计学意义。[结论]3型伽马钉治疗老年股骨转子间骨折创伤小、疗效可靠、并发症少,是高龄股骨转子间骨折的有效治疗方法。     

Femoral Neck and Intertrochanteric Fractures Have Different Risk Factors: A Prospective Study

The aim of this study was to determine whether both types of hip fracture, femoral neck and intertrochanteric, have similar risk factors. A prospective cohort study was carried out on community-dwelling elderly women in four areas of the United States: Baltimore, MD; Pittsburgh, PA; Minneapolis, MN and Portland, OR. The participants were 9704 Caucasian women, 65 years and older, of whom 279 had fractured their femoral neck and 222 had fractured their trochanteric region of the proximal femur. The predictors used were the bone mass of the calcaneus and proximal femur, anthropometry, history of fracture (family and personal), medication use, functional status, physical activity and visual function. The main outcome measures were femoral neck and intertrochanteric fractures occurring during an average of 8 years of follow-up. In multivariate proportional hazards models, several risk factors increased the risk of both types of hip fracture; including femoral neck bone density and increased functional difficulty. In hazard regression models that directly compared risk factors for the two types of hip fracture, calcaneal bone mineral density (BMD) predicted femoral neck fractures more strongly than intertrochanteric fractures (OR = 1.16; 95% CI = 1.02–1.31). Steroid use and impaired functional status also predicted femoral neck fractures instead of intertrochanteric fractures. Poor health status (OR = 0.74; 95% CI = 0.55–1.00) predicted intertrochanteric fractures more strongly than femoral neck fractures. We conclude that femoral neck fractures are largely predicted by BMD and poor functional ability while aging and poor health status predispose to intertrochanteric fractures. Received: 8 February 2000 / Accepted: 10 June 2000     

肱骨近端、髋部骨折老年女性骨密度和骨代谢指标对比研究

目的对髋部、肱骨近端骨折老年女性的骨密度和骨代谢指标进行对比分析,进一步揭示上述骨折部位女性患者骨密度和骨代谢指标特征性变化情况。方法经患者及家属同意,共纳入62例老年髋部骨折女性患者(其中股骨颈骨折39例,股骨粗隆间骨折23例)、肱骨近端骨折21例,收集患者年龄、检测患者骨密度、血清骨转换指标(Ⅰ型胶原氨基端延长肽,P1NP;Ⅰ型胶原C端肽β降解产物,β-CTX)。结果肱骨近端骨折女性患者平均年龄为(66.1±8.0)岁,明显小于股骨颈骨折、粗隆间骨折女性患者(P<0.05);肱骨近端骨折女性髋部(T=-1.19±0.66)、腰椎骨密度(T=-1.67±1.00)明显高于粗隆间骨折女性髋部(T=-2.36±1.17)、腰椎骨密度(T=-2.61±1.42)(P<0.05),同时显著高于股骨颈骨折患者髋部骨密度(T=-2.33±0.99)。股骨颈骨折、股骨粗隆间骨折患者髋部、腰椎骨密度相比差异无统计学意义;三组间血清P1NP比较差异没有统计学意义,粗隆间骨折女性血清β-CTX(732.18±334.37μg/L)要明显高于肱骨近端骨折患者(529.66±292.34μg/L)(P<0.05)。结论相对于髋部骨折患者,肱骨近端骨折老年女性患者年龄较低,骨密度相对较高;骨吸收活跃可能是导致粗隆间骨折女性骨密度下降的原因。     

Proximal Femur Geometry To Detect and Distinguish Femoral Neck Fractures from Trochanteric Fractures in Postmenopausal Women

Some proximal femur geometry (PFG) parameters, measured by dual-energy X-ray absorptiometry (DXA), have been reported to discriminate subjects with hip fracture. Relatively few studies have tested their ability to discriminate femoral neck fractures from those of the trochanter. To this end we performed a cross-sectional study in a population of 547 menopausal women over 69 years of age with femoral neck fractures (n= 88), trochanteric fractures (n= 93) or controls (n= 366). Hip axis length (HAL), neck–shaft angle (NSA), femoral neck diameter (FND) and femoral shaft diameter (FSD) were measured by DXA, as well as the bone mineral density (BMD) of the nonfractured hip at the femoral neck, trochanter and Ward’s triangle. In fractured subjects, BMD was lower at each measurement site. HAL was longer and NSA wider in those with femoral neck fractures. With logistic regression the age-adjusted odds ratio (OR) for a 1 standard deviation (SD) decrease in BMD was significantly associated at each measurement site with femoral neck fracture (femoral neck BMD: OR 1.9, 95% confidence interval (95% CI): 1.4–2.5; trochanter BMD: OR 1.6, 95% CI 1.2–2.0; Ward’s triangle BMD: OR 1.7, 95% CI 1.3–2.2) and trochanteric fracture (femoral neck BMD: OR 2.6, 95% CI 1.9–3.6; trochanter BMD: OR 3.0, 95% CI 2.2–4.1; Ward’s triangle BMD: OR 1.8, 95% CI 1.4–2.3). Age-adjusted OR for 1 SD increases in NSA (OR 2.2, 95% CI 1.7–2.8) and HAL (OR 1.3, 95% CI 1.1–1.6) was significantly associated with the fracture risk only for femoral neck fracture. In the best predictive model the strongest predictors were site-matched BMD for both fracture types and NSA for neck fracture. Trochanteric BMD had the greatest area (0.78, standard error (SE) 0.02) under the receiver operating characteristic curve in trochanteric fractures, whereas for NSA (0.72, SE 0.03) this area was greatest in femoral neck fractures. These results confirm the association of BMD with proximal femur fracture and support the evidence that PFG plays a significant role only in neck fracture prediction, since NSA is the best predictive parameter among those tested. Received: 24 April 2001 / Accepted: 1 August 2001     

In vivo discrimination of hip fracture with quantitative computed tomography: Results from the prospective European Femur Fracture Study (EFFECT)

In assessing osteoporotic fractures of the proximal femur, the main objective of this in vivo case‐control study was to evaluate the performance of quantitative computed tomography (QCT) and a dedicated 3D image analysis tool [Medical Image Analysis Framework—Femur option (MIAF‐Femur)] in differentiating hip fracture and non–hip fracture subjects. One‐hundred and seven women were recruited in the study, 47 women (mean age 81.6 years) with low‐energy hip fractures and 60 female non–hip fracture control subjects (mean age 73.4 years). Bone mineral density (BMD) and geometric variables of cortical and trabecular bone in the femoral head and neck, trochanteric, and intertrochanteric regions and proximal shaft were assessed using QCT and MIAF‐Femur. Areal BMD (aBMD) was assessed using dual‐energy X‐ray absorptiometry (DXA) in 96 (37 hip fracture and 59 non–hip fracture subjects) of the 107 patients. Logistic regressions were computed to extract the best discriminates of hip fracture, and area under the receiver characteristic operating curve (AUC) was calculated. Three logistic models that discriminated the occurrence of hip fracture with QCT variables were obtained (AUC = 0.84). All three models combined one densitometric variable—a trabecular BMD (measured in the femoral head or in the trochanteric region)—and one geometric variable—a cortical thickness value (measured in the femoral neck or proximal shaft). The best discriminant using DXA variables was obtained with total femur aBMD (AUC = 0.80, p = .003). Results highlight a synergistic contribution of trabecular and cortical components in hip fracture risk and the utility of assessing QCT BMD of the femoral head for improved understanding and possible insights into prevention of hip fractures. © 2011 American Society for Bone and Mineral Research.     

Active shape modeling of the hip in the prediction of incident hip fracture

The objective of this study was to evaluate right proximal femur shape as a risk factor for incident hip fracture using active shape modeling (ASM). A nested case‐control study of white women 65 years of age and older enrolled in the Study of Osteoporotic Fractures (SOF) was performed. Subjects (n = 168) were randomly selected from study participants who experienced hip fracture during the follow‐up period (mean 8.3 years). Controls (n = 231) had no fracture during follow‐up. Subjects with baseline radiographic hip osteoarthritis were excluded. ASM of digitized right hip radiographs generated 10 independent modes of variation in proximal femur shape that together accounted for 95% of the variance in proximal femur shape. The association of ASM modes with incident hip fracture was analyzed by logistic regression. Together, the 10 ASM modes demonstrated good discrimination of incident hip fracture. In models controlling for age and body mass index (BMI), the area under receiver operating characteristic (AUROC) curve for hip shape was 0.813, 95% confidence interval (CI) 0.771–0.854 compared with models containing femoral neck bone mineral density (AUROC = 0.675, 95% CI 0.620–0.730), intertrochanteric bone mineral density (AUROC = 0.645, 95% CI 0.589–0.701), femoral neck length (AUROC = 0.631, 95% CI 0.573–0.690), or femoral neck width (AUROC = 0.633, 95% CI 0.574–0.691). The accuracy of fracture discrimination was improved by combining ASM modes with femoral neck bone mineral density (AUROC = 0.835, 95% CI 0.795–0.875) or with intertrochanteric bone mineral density (AUROC = 0.834, 95% CI 0.794–0.875). Hips with positive standard deviations of ASM mode 4 had the highest risk of incident hip fracture (odds ratio = 2.48, 95% CI 1.68–3.31, p < .001). We conclude that variations in the relative size of the femoral head and neck are important determinants of incident hip fracture. The addition of hip shape to fracture‐prediction tools may improve the risk assessment for osteoporotic hip fractures. © 2011 American Society for Bone and Mineral Research.     

Incidence,Classification, and Risk Factors for Intraoperative Periprosthetic Femoral Fractures in Patients Undergoing Total Hip Arthroplasty With a Single Stem: A Retrospective Study

BackgroundThe collum femoris preserving (CFP) stem was a specially designed femoral neck preserving component. The incidence, classification, and risk factors for intraoperative periprosthetic femoral fractures with this special stem remain unclear.MethodsThis was a retrospective study. We analyzed the clinical and radiological data of all patients who underwent primary hip arthroplasty with a CFP stem in our hospital between January 2006 and November 2018. Demographic characteristics and radiological features were obtained from the medical records and the Picture Archiving and Communication System, respectively. The incidence, Vancouver classification, and risk factors for intraoperative periprosthetic femoral fractures were identified.ResultsA total of 1633 hips were included. The incidence rate of periprosthetic femoral fractures in patients undergoing total hip arthroplasty with a CFP stem was 3.2%. According to the Vancouver classification, there were 24 patients (45.3%) with Vancouver type A fractures, 27 patients (50.9%) with Vancouver type B fractures, and 2 patients (3.8%) with Vancouver type C fractures. Five independent risk (protective) factors were found, including surgical history (odds ratio [OR] = 3.275, 95% confidence interval [CI] = 1.192-8.997), neck-shaft angle (OR = 1.104, 95% CI = 1.058-1.152), neck length preserved (OR = 0.913, 95% CI = 0.850-0.980), canal flare index (OR = 0.636, 95% CI = 0.413-0.980), and bone mineral density (OR = 0.083, 95% CI = 0.016-0.417).ConclusionThe detailed characteristics of intraoperative periprosthetic femoral fractures in patients who received a CFP stem were identified in this study. Cracks of the femoral neck and fractures on the front side of the proximal femur were more common in patients with CFP stems. As a kind of a femoral neck preserving stem, the anatomical features (eg, neck-shaft angle, preserving length) of the remaining femoral neck might influence the incidence and characteristics of intraoperative periprosthetic femoral fractures in patients with CFP stems.     

老年髋部骨折术后健侧骨折的危险因素分析

目的: 探讨老年髋部骨折术后健侧骨折的发生率及其相关危险因素为预防再次骨折提供依据。方法: 回顾分析2012年6月至2017年6月接受髋关节置换术或股骨近端髓内钉固定术治疗的65岁以上股骨颈骨折或转子间骨折452例患者的临床资料,男168例,女284例;年龄65~97(75.5±7.5)岁;股骨颈骨折191例,股骨转子间骨折261例;按照术后健侧髋部是否存在骨折,分为骨折组和无骨折组,记录两组患者性别、年龄、体质量指数、骨折类型、初次治疗方式、骨密度、医疗依从性、术后是否短期谵妄、伤前是否并存内科疾病及末次随访髋关节Harris评分。应用单因素Logostic回归分析筛选出术后健侧骨折的危险因素,再将有统计学意义的危险因素纳入多因素Logostic回归分析,筛选出老年髋部骨折术后健侧骨折的独立危险因素。结果: 452例患者中42例发生健侧髋部骨折,发生率为9.3%,两次骨折发生相隔时间平均(2.9±2.1)年。单因素Logistic回归分析结果示年龄、骨密度、医疗依从性、术后短期谵妄、伤前合并内科疾病及末次随访髋关节Harris评分差异均有统计学意义(P<0.05)。多因素Logistic分析显示年龄(OR=4.227)、骨密度(OR=4.313)、合并内科疾病(OR=5.616),以及末次随访髋关节Harris评分分级低(OR=3.891),是老年髋部骨折术后健侧骨折的独立危险因素(P<0.05)。结论: 年龄、骨密度、合并内科疾病以及末次随访髋关节Harris评分分级低是老年髋部骨折术后健侧骨折的主要危险因素,术后3年内要加强内科疾病的治疗,抗骨质疏松,改善髋关节功能,以预防健侧髋部骨折的发生。     

Association of low-energy femoral fractures with prolonged bisphosphonate use: a case--control study

Summary  Recent evidence has linked long-term bisphosphonate use with insufficiency fractures of the femur in postmenopausal women. In this case–control study, we have identified a significant association between a unique fracture of the femoral shaft, a transverse fracture in an area of thickened cortices, and long-term bisphosphonate use. Further studies are warranted. Introduction  Although clinical trials confirm the anti-fracture efficacy of bisphosphonates over 3–5 years, the long-term effects of bisphosphonate use on bone metabolism are unknown. Femoral insufficiency factures in patients on prolonged treatment have been reported. Methods  We performed a retrospective case–control study of postmenopausal women who presented with low-energy femoral fractures from 2000 to 2007. Forty-one subtrochanteric and femoral shaft fracture cases were identified and matched by age, race, and body mass index to one intertrochanteric and femoral neck fracture each. Results  Bisphosphonate use was observed in 15 of the 41 subtrochanteric/shaft cases, compared to nine of the 82 intertrochanteric/femoral neck controls (Mantel–Haenszel odds ratio (OR), 4.44 [95% confidence interval (CI) 1.77–11.35]; P = 0.002). A common X-ray pattern was identified in ten of the 15 subtrochanteric/shaft cases on a bisphosphonate. This X-ray pattern was highly associated with bisphosphonate use (OR, 15.33 [95% CI 3.06–76.90]; P < 0.001). Duration of bisphosphonate use was longer in subtrochanteric/shaft cases compared to both hip fracture controls groups (P = 0.001). Conclusions  We found a significantly greater proportion of patients with subtrochanteric/shaft fractures to be on long-term bisphosphonates than intertrochanteric/femoral neck fractures. Bisphosphonate use was highly associated with a unique X-ray pattern. Further studies are warranted.     

Femoral Bone Mineral Density, Neck-Shaft Angle and Mean Femoral Neck Width as Predictors of Hip Fracture in Men and Women

The effect of femoral bone mineral density (BMD) and several parameters of femoral neck geometry (hip axis length, neck–shaft angle and mean femoral neck width) on hip fracture risk in a Spanish population was assessed in a cross-sectional study. All parameters were determined by dual-energy X-ray absorptiometry. There were 411 patients (116 men, 295 women; aged 60–90 years) with hip fractures in whom measurements were taken in the contralateral hip. Controls were 545 persons (235 men, 310 women; aged 60–90 years) who participated in a previous study on BMD in a healthy Spanish population. Femoral neck BMD was significantly lower, and neck–shaft angle and mean femoral neck width significantly higher, in fracture cases than in controls. The logistic regression analysis adjusted by age, height and weight showed that a decrease of 1 standard deviation (SD) in femoral neck BMD was associated with an odds ratio of hip fracture of 4.52 [95% confidence interval (CI) 2.93 to 6.96] in men and 4.45 (95% CI 3.11 to 6.36) in women; an increase of 1 SD in neck–shaft angle of 2.45 (95% CI 1.73 to 3.45) in men and 3.48 (95% CI 2.61 to 4.65) in women; and an increase of 1 SD in mean femoral neck width of 2.15 (95% CI 1.55 to 2.98) in men and 2.40 (95% CI 1.79 to 3.22) in women. The use of a combination of femoral BMD and geometric parameters of the femoral neck except for hip axis length may improve hip fracture risk prediction allowing a better therapeutic strategy for hip fracture prevention. Received: 16 September 1999 / Accepted: 22 February 2000     

Femoral neck bone loss predicts fracture risk independent of baseline BMD.

Whereas low BMD is known to be a risk factor for fracture, it is not clear whether loss of BMD is also a risk factor. In elderly women, greater loss of BMD at the femoral neck was associated with increased risk of fracture, independent of baseline BMD and age. INTRODUCTION: Baseline measurement of BMD predicts fracture risk. However, it is not clear whether short-term bone loss is an independent risk factor for fractures. This study was designed to investigate the relationship between changes in BMD and fracture risk in elderly women in the general population. MATERIALS AND METHODS: A total of 966 women > or = 60 years of age (mean, 70 +/- 6.7 [SD] years), who had been followed for an average of 10.7 years, were studied. Atraumatic fracture of the proximal femur (hip), symptomatic vertebral fracture, and other major fractures, excluding pathological fractures or those resulting from severe trauma, were recorded and confirmed by radiographs. Femoral neck and lumbar spine BMD was measured by DXA. RESULTS: During the follow-up period, 224 had sustained a fracture (including 43 hip, 71 symptomatic vertebrae, 37 proximal humerus, 46 forearm and wrist, and 27 rib and pelvis fractures). The annual rate of change in BMD in fracture women (-2.1 +/- 4.2%) was significantly higher than that in nonfracture women (-0.8 +/- 2.8%; p = 0.005). In the multivariable Cox's proportional hazards analysis, the following factors were significant predictors of fracture risk: femoral neck bone loss (relative hazard [RH], 1.4; 95% CI, 1.1-1.8 per 5% loss), baseline femoral neck BMD (RH, 2.0; 95% CI, 1.7-2.7 per SD), and advancing age (RH, 1.2; 95% CI, 1.1-1.4). The proportion of fractures attributable to the three factors was 45%. For hip fracture, the attributable risk fraction was approximately 90%. CONCLUSION: Bone loss at the femoral neck is a predictor of fracture risk in elderly women, independent of baseline BMD and age.