股骨头坏死保髋手术对后续全髋关节置换的影响

背景：保留髋关节手术是目前治疗年轻早期股骨头坏死的重要手段,但保髋手术种类较多且各类术式都存在自身的局限性以及难以避免的失败率,部分患者在接受了保髋手术治疗后效果欠佳,而在后续治疗中不得不接受全髋关节置换。目的：文章就治疗股骨头坏死的各类保髋手术对后续全髋关节置换影响的研究进展情况作一综述。方法：以“股骨头坏死、保髋手术、髓芯减压、骨移植、截骨、钽棒植入、髋关节表面置换”为中文检索词,以“Osteonecrosis of the femoral head,Hip-preservation surgery,Core decompression,Bone grafting,Osteotomy,Porous tantalum implantation,Hip resurfacing arthroplasty”为英文检索词,分别检索中国知网、PubMed数据库以及Embase数据库。通过阅读文题和摘要进行初步筛选;排除重复性研究、低质量期刊及内容不相关的文献,最后纳入58篇文献进行综述。结果与结论：（1）目前临床应用的保髋术式主要包括髓芯减压、非血管化植骨、带血运的植骨及截骨和钽棒植入等几大类...     

个体化股骨头导板在髋关节表面置换术中应用的实验研究

目的 探讨个体化股骨头导板在人工髋关节表面置换术中应用的可行性和安全性。方法 2019 年 1-5 月,选取昆明医科大学解剖学教研室提供的17具成人骨盆标本,其中男 9 具、女 8具,年龄40～70岁,身高155～165 cm。每具骨盆标本按侧别分为导板组(左侧)和对照组(右侧)。导板组基于标本CT轴位扫描数据计算出股骨颈的解剖轴线,设计并制作出与股骨颈部表面解剖形态一致的导板,利用导板辅助定位针置入标本。对照组采用传统股骨头假体定位方法置入定位针。术后行X线摄片和CT扫描,观察定位针与股骨头中心、股骨颈解剖轴线的位置关系,判断股骨头定位针有无内外翻和前后倾。测量对比术前股骨颈干角(NSA)和术后定位针柄干角(SSA)、侧方偏移角、水平偏移角,来评价导板辅助手术的准确性。结果 (1)在导板组中,术中股骨头导板与股骨颈部贴附紧密,稳定性好,能够辅助定位针顺利置入。术后CT、X线摄片显示,17例标本定位针均经过股骨头中心、股骨颈解剖中心。相对于股骨颈解剖轴线,正位X线片显示15例外翻、1例内翻、1例平行,侧位X线片显示14例平行、2例前倾、1例后倾。(2)对照组术后CT显示,12例标本定位针经过股骨头中心、股骨颈解剖中心。正位X线片显示,定位针12例经过股骨头中心、股骨颈解剖中心,相对于股骨颈解剖轴线,12例外翻、2例内翻、3例平行;侧位X线片显示,定位针15例经过股骨头中心、股骨颈解剖中心,相对于股骨颈解剖轴线,10例平行、5例前倾、2例后倾。(3)术前NSA和术后定位针SSA、侧方偏移角、水平偏移角,导板组分别为133.1°±3.52°、138.0°±4.1°、5.2°±2.1°、4.6°±2.3°,对照组分别为133.7°±3.4°、144.3°±5.6°、13.0°±1.7°、8.2°±2.9°,两组间比较,术前NSA差异无统计学意义(P＞0.05)。术后导板组SSA、侧方偏移角、水平偏移角均小于对照组,差异均有统计学意义(t=4.307、14.280、3.520,P值均＜0.05)。结论 个体化股骨头导板应用于髋关节表面置换术中,能为股骨头假体的精确定位、定向置入提供辅助作用。     

股骨头坏死和骨关节炎患者初次全髋关节置换后髋臼假体周围的骨密度差异

BACKGROUND: Failure rate is higher in patients with osteonecrosis of femoral head than in osteoarthritis patients after primary total hip arthroplasty, especially acetabular prosthesis. Bone mineral density around the prosthesis is a key factor for quality of life of the prosthesis.  OBJECTIVE: To observe the difference in periprosthetic bone mineral density between patients with osteonecrosis of the femoral head and osteoarthritis patients and the exact location of differences after primary total hip arthroplasty.     

一期全髋置换与股骨头置换修复老年股骨颈骨折：髋关节功能与并发症的Meta分析

BACKGROUND: There are objections to the efficacy and safety of total hip arthroplasty and artificial femoral head arthroplasty in the treatment of femoral neck fracture.     

全髋关节表面置换术后股骨侧应力分布的有限元分析

目的：探讨金属对金属髋关节表面置换术后股骨侧应力分布情况，为临床改良金属对金属髋关节表面置换术手术方案提供生物力学依据。方法：采用64排螺旋CT扫描金属对金属髋关节表面置换术后患者数据，重建金属对金属髋关节表面置换术后有限元分析模型，对该模型进行虚拟加载和仿真计算，比较分析金属对金属髋关节表面置换术后股骨侧的应力分布。结果：髋关节表面置换术后股骨侧应力集中于股骨颈内侧部及假体与股骨颈交界部，以股骨颈内侧部尤为明显。股骨假体覆盖区存在明显应力遮挡。结论：金属对金属髋关节表面置换术后，应力主要集中于股骨颈内侧及假体与头颈交界部，并在股骨假体下骨质部存在应力遮挡，髋关节表面置换术后的应力集中及应力遮挡与股骨颈骨折发生存在一定联系。     

大头径陶瓷-陶瓷全髋关节置换的早期疗效

背景：36 mm大直径陶瓷球头较28 mm常规直径陶瓷头增加了跳越距离,具有活动范围大,稳定性好,脱位率低等特点,适用于年轻,要求活动范围大,追求高生活质量患者。 目的：观察36 mm大头径陶瓷-陶瓷全髋关节假体行关节置换的早期疗效。 方法：2009-06/2010-07采用Depuy公司的PinnacleTM 36 mm大头径陶瓷-陶瓷全髋假体行初次人工全髋关节置换治疗18例(18髋)髋关节疾病患者。对照组为同期行PinnacleTM 28 mm直径陶瓷-陶瓷人工全髋关节置换治疗20例(20髋)髋关节疾病患者。 结果与结论：所有患者均获得随访,随访时间13~26个月。置换后切口均Ⅰ期愈合,未发生假体脱位、感染及下肢深静脉血栓形成等并发症。两组患者置换后Harris各项评分较置换前均明显改善(P < 0.05),且直径36 mm组置换后活动范围评分较直径28 mm组改善明显(P < 0.05);但两组置换后Harris总评分及疼痛、功能评分比较差异无显著性意义(P > 0.05)。结果初步表明现代陶瓷-陶瓷人工关节假体能有效减少因关节界面磨损导致的骨溶解及关节松动等并发症。36 mm大头径陶瓷-陶瓷全髋假体设计具有活动范围大,稳定性好,脱位率低等特点,在术中条件允许情况下,可作为首选型号。       

中年患者128例生物型全髋置换和骨水泥全髋置换后的随访比较

背景：许多学者均认为骨水泥型全髋置换适合应用于年老且合并较严重的骨质疏松患者,生物型全髋置换适用于较为年轻的患者。 目的：对比中年患者生物型全髋置换和骨水泥型全髋置换的临床效果。 方法：对比分析58例骨水泥型全髋置换者与70例生物型全髋置换者置换后6个月、2年及5年的肢体功能恢复与影像学评估结果以及Harris评分,均为40~60岁中年患者。 结果与结论：生物型假体置换后6个月、2年、5年的Harris评分明显优于骨水泥型假体(P < 0.05),5年生存率也高于骨水泥型假体(P < 0.05)。骨水泥型假体置换后6个月,3例发生自发溶骨性疾病,3例2年后发生假体松动,3例5年后发生线性渗透溶;生物型假体置换2年后2例发生自发溶骨性疾病,置换后5年1例发生假体松动。说明生物型假体较骨水泥型假体更能促进中年患者置换后髋关节功能的恢复,减少并发症的发生,至少在5年的随访过程中获得了更令人满意的临床和影像学结果。关键词：生物型假体;骨水泥型假体;全髋关节置换;Harris评分;人工假体 doi:10.3969/j.issn.1673-8225.2012.17.008     

激素性股骨头坏死与股骨颈骨折患者股骨头内骨小梁形态学对比研究

目的利用微计算机断层扫描技术(Micro-CT)对比分析激素性股骨头坏死与股骨颈骨折患者的股骨头内骨小梁的结构特点。 方法选取2016年9月至2017年9月因股骨颈骨折与激素性股骨头坏死于大连大学附属中山医院行人工全髋关节置换术的患者,分别设为骨折组与坏死组,每组各20例(20髋),术中完整取出股骨头作为研究材料。应用计算机对股骨头进行三维重建,利用x、y、z轴各2个相互平行的平面将股骨头分割成27个区域,27个区域的编号规则：分为内侧、中间、外侧3个区,每组按照由前向后、由上向下的顺序编为1～9号。内侧区编号为m1、m2……m9;中间区编号为c1、c2……c9;外侧区编号为l1、l2……l9。对样本进行Micro-CT断层扫描,获取股骨头样本的计算机三维图像。手工选取兴趣区,采用骨体积分数、骨小梁厚度、骨小梁数量、骨小梁间隙等三维空间参数分别对2组股骨头内骨小梁进行评价。数据比较采用t检验和单因素方差分析。 结果在骨折组中,将股骨头按矢状面分割为内侧区、中间区、外侧区进行对比,中间区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小的优势骨小梁区域,差异均有统计学意义(F＝36.59、73.50、38.60、48.50,P值均小于0.05);将股骨头按冠状面分割为前区、中间区、后区进行对比,前区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小,差异均有统计学意义(F＝69.50、43.92、85.40、36.00,P值均小于0.05);将股骨头按水平面分割为上区、中间区、下区进行对比,上区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小,差异均有统计学意义(F＝37.03、29.47、255.50、45.50,P值均小于0.05)。对比坏死组股骨头不同部位骨小梁微结构参数,如果将股骨头分为内侧区、中间区、外侧区,中间区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小的优势骨小梁区域,差异均有统计学意义(F＝41.42、26.60、400.00、36.00,P值均小于0.05);如果将股骨头分为上区、中间区、下区,上区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小,差异均有统计学意义(F＝52.99、25.33、28.50、37.33,P值均小于0.05);如果将股骨头分为前区、中间区、后区,前区表现为骨体积分数均值最大、厚度均值最大、数量均值最大、间隙均值最小,差异均有统计学意义(F＝2 567.17、57.29、42.11、41.17,P值均小于0.05)。与坏死组相比,骨折组骨小梁骨体积分数均值更大,差异有统计学意义(t＝4.90,P＝0.01)、骨小梁厚度均值更大,差异有统计学意义(t＝－4.17,P＝0.01)、骨小梁数量均值更大,差异有统计学意义(t＝－31.37,P＝0.01),骨小梁间隙均值更小,差异有统计学意义(t＝－7.12,P＝0.01)。 结论激素对于坏死股骨头的影响不仅仅是坏死区,包括硬化区、正常骨小梁区,即对于整个股骨头都产生了影响。     

成人非创伤性股骨头坏死不同部位骨密度结合骨转换标志物特点研究

目的研究成人非创伤性股骨头坏死(ONFH)不同部位的骨密度以及骨转换标志物特点。 方法收集2017年9月至2019年3月在广州中医药大学第一附属医院三骨科住院诊断为非创伤性ONFH的患者共150例278髋(坏死组),男92例、女58例,平均年龄为(40.9±9.5)岁,其中酒精性ONFH 43例,特发性ONFH 23例,激素性ONFH 84例,国际骨循环研究会(ARCO)分期Ⅱ期84例,Ⅲ期ARCO 66例。收集同期在广州中医药大学第一附属医院行骨密度检查的健康人群共101例(对照组),男61例、女40例,平均年龄为(41.9±10.7)岁。采用双能X线骨密度测量仪测量2组股骨颈、腰椎(L1～L4)、髋关节的骨密度值,抽血检测2组血清Ⅰ型胶原氨基端延长肽(P1NP)、Ⅰ型胶原降解产物(β-CTx)及碱性磷酸酶(ALP)等骨转换标志物的水平。数据比较采用独立样本t检验与单因素方差分析。 结果(1)坏死组的股骨颈骨密度值[(0.97±0.15) g/cm²]高于对照组股骨颈骨密度值[(0.91±0.14) g/cm²],差异有统计学意义(t＝3.148,P＝0.002),坏死组髋关节骨密度值[(0.94±0.12) g/cm²]、腰椎骨密度值[(1.11±0.14) g/cm²]与对照组髋关节骨密度值[(0.96±0.14) g/cm²]、腰椎骨密度值[(1.12±0.15) g/cm²]相比,差异均无统计学意义(t＝－0.548、－1.461,P＝0.584、0.145);坏死组患者血清P1NP[(65.44±28.64) ng/mL]、ALP[(68.89±19.15) U/L]水平均高于对照组血清P1NP[(56.82±23.49) ng/mL]、ALP[(59.64±23.72) U/L],而血清β-CTx[(0.54±0.27) ng/mL]水平低于对照组[(0.62±0.29) ng/mL],差异均有统计学意义(t＝2.608、3.404、－2.095, P＝0.010、0.001、0.037)。(2)坏死组中酒精性ONFH股骨颈骨密度值[(1.02±0.15) g/cm²]高于激素性ONFH[(0.96±0.14) g/cm²]与特发性ONFH[(0.93±0.14) g/cm²],差异有统计学意义(F＝3.954,P＝0.021);3种坏死类型间腰椎与髋关节的骨密度值、血清P1NP 、β-CTx水平比较,差异均无统计学意义(P值均大于0.05),酒精性ONFH血清ALP[(76.09±18.36) U/L]水平高于激素性ONFH[(65.49±18.82) U/L],差异有统计学意义(P<0.05)。(3)坏死组中ARCO Ⅱ期患者股骨颈骨密度[(0.95±0.15 )g/cm²]低于ARCO Ⅲ期[(1.00±0.14) g/cm²],差异有统计学意义(t＝－2.346,P＝0.020),腰椎与髋关节骨密度值差异均无统计学意义(P值均大于0.05);ARCO Ⅱ期患者血清P1NP[(70.24±32.11) ng/mL]、血清β-CTx水平[(0.60±0.27) ng/mL]均高于ARCO Ⅲ期[(59.33±22.26) ng/mL、(0.47±0.25) ng/mL]患者,差异均有统计学意义(t＝2.454、2.985,P＝0.015、0.003),两期患者血清ALP水平比较,差异无统计学意义(P>0.05)。 结论成人非创伤ONFH的坏死周围区域骨密度可能会升高,且随着病情的进展,坏死部位的修复,坏死周围区域的骨密度呈上升趋势。而在不同坏死类型中,酒精性ONFH周围区域骨密度增高最明显。     

The wear of a polyethylene socket articulating with a zirconia ceramic femoral head in canine total hip arthroplasty.

Wear of yttria-zirconia (zirconia) in the femoral head was investigated in mature mongrel dogs weighing 10 to 13 kg. Two dogs, which were used as a control group, were sacrificed 18 months after implantation of the uncemented modular hip system with an alumina ceramic (alumina) femoral head. A zirconia femoral head was implanted in five dogs: one was sacrificed 12 months after implantation, two at 18 months, and two at 24 months. In each femoral head and polyethylene (PE) socket, the surface was observed by means of scanning electron microscopy (SEM); the mean articulation surface roughness on the femoral head and PE socket and the thickness of the PE socket were measured. Wear was not seen on the surface of either the zirconia or the alumina heads. In both groups, minute white spots on the smooth surface of the PE socket were visible by SEM. In the alumina and zirconia groups the mean roughness was 0.1 microm. The mean thickness of the PE socket was reduced by 0.2 mm in the alumina group. In the zirconia group it was reduced by 0.2 to 0.3 mm. However, the mechanical strength of zirconia is known to be greater than that of alumina and it may be possible to reduce the diameter of the femoral head. The smaller zirconia head may contribute to the reduction of the wear of the PE socket in an uncemented modular total hip system.     

髓芯减压植骨支撑术治疗股骨颈骨折术后股骨头坏死的早期疗效观察

目的探讨髓芯减压植骨支撑术治疗股骨颈骨折术后股骨头缺血性坏死的早期疗效。方法对21例行三根钉手术治疗的股骨颈骨折患者,经X线、CT、ECT或MRI确诊为股骨头坏死,所有患者采用髓芯减压植骨支撑术治疗。依据ARCO分期:Ⅰ期2髋,ⅡA11髋,ⅡB6髋,ⅡC1髋,IIIA1髋,术前及术后所有患者采用Harris髋关节评分系统进行评分、影像学检查并加以比较。结果随访9~18个月,Harris评分由术前(73.4±7.2)增加到术后(89.4±7.9),优良率85.2%。结论采用髓芯减压植骨支撑术治疗股骨颈骨折术后股骨头坏死,恢复了股骨头前外侧柱的生物力学稳定,促进了坏死病灶的修复,对患者具有良好的早期疗效。     

股骨颈保留型人工全髋关节置换后的应力分析

背景：股骨颈保留型(Collum Femoris Preserving,C.F.P)假体为意大利骨科医生Pipino与德国LINK公司联合设计开发。该假体手术操作手册中推荐截骨平面是否适合国人股骨结构特点以及所采用截骨方式是否会引起假体以及股骨应力发生变化,目前尚未见研究报告。 目的：通过临床病例回顾和三维有限元模型分析股骨颈保留型人工全髋关节置换的临床疗效以及应力分布变化。 方法：①回顾分析36例股骨颈保留型全髋关节置换及36例普通生物型全髋关节置换患者临床资料,通过Harris评分、目测类比评分、置换前后偏心距变化、IDES-Engh放射学及并发症等指标评价疗效。②建立两种不同截骨平面股骨颈保留型全髋关节置换有限元分析模型,分析股骨转子间窝上1.5 cm及头颈交界处为截骨平面带来的偏心距差异、股骨以及假体应力分布变化。 结果与结论：①头颈交界处为截骨平面的股骨颈保留型全髋关节置换,短期随访临床疗效优良,与普通生物型无明显差别。②有限元分析显示：头颈交界为截骨平面与转子间窝上1.5 cm为截骨平面比较,偏心距增大,假体及股骨所受应力增大,但应力分布相同。中国组织工程研究杂志出版内容重点：人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程全文链接：     

骨细胞凋亡在酒精性股骨头缺血性坏死中的作用

文章快速阅读：  文题释义：细胞凋亡：为维持细胞内环境稳定,由基因控制的细胞自主的有序的死亡。细胞凋亡与细胞坏死不同,细胞凋亡指细胞在一定生理或病理条件下遵循着自身的规律结束其生命的过程,不是一件被动的过程,而是主动过程,涉及一系列基因的激活、表达以及调控等的作用,不是在病理条件下自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程。股骨头坏死及酒精性股骨头坏死：股骨头坏死又称股骨头无菌性坏死,或股骨头缺血性坏死,是由于多种原因导致的股骨头局部血运不良,从而引起骨细胞进一步缺血、坏死、骨小梁断裂、股骨头塌陷的一种病变。酒精性股骨头坏死就是因为大量酗酒而引起的一种股骨头坏死,是脂类代谢异常导致的结果。 背景：目前对酒精性股骨头缺血坏死仍缺乏行之有效的保髋疗法,病变晚期股骨头塌陷影响髋关节功能的患者只能选择人工髋关节置换。明确酒精性股骨头缺血坏死的发病机制,对股骨头缺血坏死保髋治疗有重要意义。 目的：综述近年来国内外有关骨细胞凋亡学说在酒精性股骨头缺血坏死发病机制中的研究进展,为探究酒精性股骨头缺血坏死的治疗方法提供理论依据。 方法：由第一作者应用计算机检索PubMed数据库及Embase数据库,在标题和全文中以“Osteonecrosis of Femoral Head and apoptosis”或“bone cell,apoptosis,gene,signal”或“osteonecrosis,alcohol”为检索词,纳入与骨细胞凋亡在酒精诱导股骨头缺血坏死发病机制中作用相关的研究文章。排除重复及较陈旧的文献。共40篇外文文献符合标准。 结果与结论：近年来,酒精性股骨头缺血坏死的发病机制学说中的骨细胞凋亡学说得到越来越多人的认同,逐步成为人们研究酒精性股骨头缺血坏死发病机制的焦点。骨细胞凋亡在酒精性股骨头缺血坏死的发病机制中发挥着重要的作用。p53、B细胞淋巴瘤家族、肿瘤坏死因子、半胱氨酸天冬氨酸蛋白水解酶等多种与骨细胞凋亡相关的基因是调控骨细胞凋亡的关键。但由于酒精性股骨头缺血坏死发病机制的复杂性,目前人们对酒精诱导骨细胞凋亡导致的股骨头缺血坏死在基因水平上的研究虽然取得了一定的进展但仍相对缺乏。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程 ORCID:0000-0001-5838-5618(黎金焕)     

Failure analysis of two Ti-alloy total hip arthroplasty femoral stems fractured in vivo

Failure of total hip arthroplasty femoral stems is a serious clinical complication. Even modern metal alloys and designs sometimes suffer such incidents. The reported study aimed at the investigation of the reasons leading the in vivo fracture of two Ti6Al4V femoral stems. Stems were retrieved during revision surgery approximately 2 years postoperatively. Examination and analysis included XRF spectrometry for identification of chemical composition, macroscopic examination and topographical measurements, SEM study of fracture surfaces, study of alloy microstructure by optical microscopy, and finally measurement of mechanical properties by means of tensile testing conducted on alloy samples machined from the stems themselves. Macroscopic examination and measurements showed close topographical similarity between the two fractures. XRF spectrometry, tensile testing, and microstructure analysis identified the alloy as a typical Ti6Al4V surgical titanium alloy. During SEM analysis the fracture surfaces exhibited characteristic fatigue striations tidally running on the cross sections, which were considered as the weakest ones regarding toward geometry and stress concentration. Fracture in both stems occurred due to fatigue along these cross sections.     

Progressive failure analysis of laminated composite femoral prostheses for total hip arthroplasty

In this research program, a numerical method was developed to predict the progressive failure of a thick laminated composite femoral component for total hip arthroplasty. A 3-D global/local technique was used to capture the overall structural response of this system while also enabling the 3-D ply level stress state to be determined efficiently and accurately. Different failure criteria and different material degradation models were incorporated as individual subroutines in the numerical method, giving it the flexibility to model a wide range of materials and structures. Numerical modeling was also conducted to design experimental test methods for component fatigue testing that closely simulate in vivo loading conditions. Parametric studies were then conducted with the numerical model of the experimental system and the results were compared to the actual experimentally determined damage behavior of fabricated laminated composite femoral component to assess which parameter set most accurately predicted the actual damage development behavior. The best fitting parameter set was then applied to the failure problem of the composite hip prosthesis implanted in an anatomically modeled femur to predict in vivo performance. This work provides a ply level understanding of the damage behavior of laminated composite femoral components and a numerical tool which can serve as a guide for the design of fatigue resistant implants made from composite material for this and other implant applications.     

陶瓷对陶瓷全髋关节置换治疗中青年股骨颈骨折的分析

背景：陶瓷对陶瓷全髋关节置换适用于活动量较大、生活质量要求较高的年轻患者。 目的：分析陶瓷对陶瓷全髋关节置换治疗青壮年患者股骨颈骨折近期治疗效果。 方法：使用陶瓷对陶瓷全髋关节置换治疗的年龄在50岁以下的中青年股骨颈骨折患者51例,评估患者治疗后髋关节功能及并发症。 结果与结论：所有患者均获随访,随访时间6个月至3年8个月。末次随访时,Harris 评分为(92.0±3.4)分,优良率 94.1%。置换后无关节脱位病例发生,3例轻度跛行,均未作特殊处理。至随访结束影像学检查结果显示,未见假体松动、下沉及碎裂发生,假体周围无透亮线形成。陶瓷对陶瓷人工髋关节置换治疗活动量相对较大的青壮年患者股骨颈骨折能有效减少因磨损碎屑造成的骨溶解,减少假体的松动及下沉,延长关节的使用寿命,改善患者的生活质量。中国组织工程研究杂志出版内容重点：人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程全文链接：     

Long-term results of Birmingham hip resurfacing arthroplasty in Asian patients

Several reports have shown good long-term results with the Birmingham hip resurfacing (BHR) arthroplasty, but little is known about the results in Asian countries where there is a high prevalence of osteonecrosis and developmental dysplasia of the hip, and many females with small femoral head sizes. Therefore, we retrospectively evaluated the long-term clinical results of the BHR in 112 Japanese patients (53 males and 59 females—130 hips) with an average age of 52 years. Implant survivorship was analyzed using the Kaplan–Meier method with the endpoint being revision for any reason. Factors such as sex, femoral component size, and type of hip disease were analyzed as predictors of implant survivorship. With a median follow-up of 12 years, six cases were revised (two for femoral component aseptic loosening, two for infection, one for cup aseptic loosening, and one for femoral neck fracture), and the overall survival rate was 96.5% (95% CI 90.9–98.7) at 10 years and 93.6% (95% CI 83.4–97.7) at 15 years. When septic revisions were excluded, the implant survival rate was 98.2% (95% CI 92.9–99.6) at 10 years and 95.3% (95% CI 83.9–98.7) at 15 years. Sex, femoral component size, and type of hip disease were not predictors of implant survivorship. In conclusion, good clinical results were obtained with the BHR at 10- and 15-year follow-up in Japanese patients who have different stature and types of hip diseases as compared with patients in Western countries.