Cementless total hip arthroplasty in the treatment of severe hip dysplasia or dislocated hips

We present our experience over 6 years with the use of uncemented total hip arthroplasty (THA) for developmental dysplasia of the hip (DDH) with a mean follow-up of 3 years. In a 6-year period, 26 THAs were performed in 19 patients with Hartofilakidis grades 2 and 3 dislocation of the hips. Out of 19 patients, seven had bilateral dislocations. Uncemented acetabular and femoral components were used in all patients. Patients with a minimum follow-up of 1 year were included in the study. The average age at the time of surgery was 38 (range 20–69) years. Approaches used include trochanteric osteotomy in 14 (54%) patients and a lateral approach in 12 (46%) patients. In addition, subtrochanteric osteotomy was performed in four (15%) patients. A Mallory-head femoral stem was used in 15 (58%) patients; a DDH femoral stem was in nine (35%), and the S-ROM femoral prosthesis in two (8%). A Mallory head acetabular shell was used in all cases, a 22.2-mm chrome cobalt head was used in 18 (69%), and a 28-mm chrome cobalt head was used in eight (31%). The average follow-up was 3 (range 1–6) years. The Harris hip score (HHS) improved in the cohort from a mean preoperative score of 51 to a mean postoperative score of 86 (p<0.05). The mean preoperative SF36v2 score was 42 compared to postoperatively of 67(p<0.05). The complication rate was 11% with nonunion of a subtrochanteric osteotomy in one patient, dislocation in one, and trochanteric bursitis due to fracture of Dall-Miles cables in one. THA for DDH is a technically demanding procedure. This short-term follow-up of THA for DDH using uncemented implants is encouraging for arthrosis secondary to DDH. It provides better function compared to arthrodesis or excision arthroplasty, especially in young individuals. A long-term follow-up is required in order to establish the role of this management strategy.     

成人髋关节发育不良全髋置换术探讨

目的探讨成人髋关节发育不良（developmental dysplasia of hip,DDH）全髋关节置换术的临床方法与疗效。方法1995年1月至2007年6月对成人DDH施行全髋关节置换术39例42髋,男性3例3髋,女性36例39髋,平均年龄51岁（41～67岁）。其中CroweⅠ～Ⅱ型32例33髋,CroweⅢ型6例8髋,CroweⅢ～Ⅳ型1例1髋。采用常规髋关节置换术,恢复髋关节旋转中心32例33髋。采用自体股骨头结构性植骨重建髋臼旋转中心6例8髋。采用S—ROM高组配式假体1例1髋。平均随访时间3．5年。结果Harris评分术后平均89分,较术前改善46分。优27例,良9例,中2例,差1例,优良率达到84．6％。1例评分为差者随访3年,有疼痛与假体松动征象。本组双下肢短缩均有明显改善,未出现感染、脱位、神经损伤并发症。结论对成人DDH应用Crowe分型结合不同方法行全髋关节置换,通过结构性植骨重建髋臼旋转中心,假体行生物型固定,应用高组配式假体均为可靠而有效的方法。     

严重髋关节发育不良的全髋关节置换术

目的 评价初次全髋关节置换术治疗伴有晚期髋关节病变的髋关节发育不良患者的临床效果,探讨其技术可行性及操作要点.方法 回顾性分析2002年3月至2008年6月因严重髋关节发育不良而行初次全髋关节置换术的35例患者的临床和影像学资料.男11例11髋,女24例28髋;平均年龄(52±6.7)岁.CroweⅢ型27例31髋,Ⅳ型8例8髋.术前平均Harris评分(42.5±5.3)分.均采用非骨水泥型全髋关节假体.结果 全部患者随访1～7年,平均46个月.末次随访时Harris评分(86.3±3.4)分,与术前比较差异有统计学意义.优33髋,良5髋,可1髋,优良率97.4%.随访期间未发现髋臼假体周围透光带及松动表现.2例出现术中髋臼骨折,根据骨折稳定性,经多枚螺钉或结构性植骨后卧床6周愈合.3例出现下肢深静脉血栓,经溶栓治疗后血栓消失.5例6髋出现Brooker Ⅰ级或Ⅱ级异位骨化.1例于术后1年因外伤发生假体远端骨折.结论 对伴有晚期髋关节病变的严重髋关节发育不良患者行初次全髋关节置换术时,术前应进行精确测量与评估,术中彻底松解软组织,正确处理髋臼和股骨,术后近期临床效果良好.     

转子下截骨全髋关节置换治疗Crowe Ⅳ型髋关节发育不良的围手术期并发症

目的 分析转子下截骨全髋关节置换治疗Crowe Ⅳ型髋关节发育不良的围手术期并发症.方法 2002年6月至2009年8月,因Crowe Ⅳ型髋关节发育不良接受股骨转子下截骨全髋关节置换术35例42髋,男11例,女24例;年龄28～68岁,平均(47.4±9.61)岁.回顾性分析围手术期并发症的类型、发生率及导致并发症的相关因素.结果 全部病例随访3～84个月,平均24.3个月.术前Harris评分平均(60.42±14.41)分,末次随访平均(81.58±26.96)分,差异有统计学意义(t=-2.3545,P=0.0382).共18髋发生并发症21髋次,并发症发生率42.9%(18/42);其中20髋次出现于2008年以前的病例,并发症发生率65.4%(17/26).包括骨折11髋(26.2%),血管并发症2髋(4.8%),神经并发症4髋(9.5%),截骨不愈合2髋(4.8%),术后脱位及假体松动各1髋(2.4%).行预防性钢丝环扎的10髋均未出现骨折,未行预防性环扎32髋中11髋出现骨折,两组差异有统计学意义(χ~2=4.657,P=0.031).Hartofilakidis C1型髋关节发育不良患者围手术期并发症发生率为55.0%(11/20),C2型为23.1%(3/13),差异无统计学意义(χ~2=3.287,P=0.070).结论 对Crowe Ⅳ型髋关节发育不良行转子下截骨全髋关节置换并发症发生率高.周密的术前设计和规范的手术操作可减少围手术期并发症的发生.     

A Modified S-ROM Stem in Primary Total Hip Arthroplasty for Developmental Dysplasia of the Hip

This study examined the clinical outcome of 220 hips in 196 Asian patients who underwent primary total hip arthroplasty (THA) for treatment of developmental dysplasia of the hip (DDH) using a modified S-ROM modular (S-ROM-A) stem designed for Asians, after 2–5 years (mean, 3.3 years) of follow-up. The stem was placed so that the anteversion angle of the neck was decreased against the sleeve in 56% of the hips and increased in 18% of the hips. Bone ingrown fixation was achieved in 99.5% of the hips on X-ray at final follow-up. There were 2 (0.9%) dislocations postoperatively. In primary THA for treatment of DDH accompanied by femoral rotational deformity, the freely-rotatable modular stem provided favorable short-term outcomes by affording both morphological and functional advantages.     

全髋置换术治疗髋关节发育不良伴骨关节炎34例报告

[目的]研究全髋置换术治疗髋关节发育不良伴骨关节炎的方法及疗效。[方法]自2004年10月～2009年10月,对34例(41髋)髋关节发育不良伴骨关节炎的成年患者进行了人工全髋关节置换术,其中女性27例32髋,男性7例9髋,平均年龄5 7岁(35～76岁)。按Crowe分型,Ⅰ型16例19髋,Ⅱ型12例14髋,Ⅲ型6例8髋,术前平均Harris评分(43.5±10.5)分。[结果]手术出血量平均350 ml(200～600 ml),输血量平均230 ml(0～600ml),引流量平均200 ml(110～450 ml),手术时间平均100 min(85～130 min),术后平均Harris评分(94.5±3.2)分,较术前有明显提高(P<0.05),优良率达95%。术后平均随访4.8年(2～7年),未发现感染、无菌性松动、假体下沉、异位骨化等并发症。[结论]对于髋关节发育不良伴骨关节炎的成年患者,全髋置换术是一种较好的治疗方法。     

Zweymuller系统全髋关节置换术治疗髋臼发育不良的中期疗效分析

目的：评价Zweymuller螺旋臼结合髋臼加深技术治疗髋臼发育不良的中期疗效。方法：自1998年1月至2004年12月,采用Zweymuller系统进行全髋关节置换术治疗髋臼发育不良继发髋关节骨性关节炎患者56例62髋,男14例（15髋）,女42例（47髋）;平均年龄48.6岁（30～67岁）。术前所有患者均有髋关节疼痛和功能障碍。观察项目包括术后并发症、影像学及功能恢复情况。髋关节功能采用Harris评分标准进行评定。结果：56例获得随访,时间5～11年,平均6.5年。X线检查显示髋臼假体位于真臼位置,与周围骨床结合紧密,髋臼假体外展角35°～45°,股骨假体内、外翻3°以内,术后患肢短缩平均（0.5±0.2）cm。术后近期发生深静脉血栓20例,予溶栓治疗后好转。近期脱位1例,复位、制动3周后下地行走。4髋发生异位骨化、均为BrookⅡ型。无感染、神经损伤病例发生。术后Harris评分（87.4±3.5）分,与术前（43.2±6.7）分比较,差异有统计学意义（P〈0.01）。结论：Zweymuller螺旋臼结合髋臼加深技术治疗髋臼发育不良继发髋关节骨性关节炎中期疗效优良。     

Tri-lock骨保留型股骨新假体全髋关节置换术的早期疗效观察

目的：探讨Tri-lock骨保留型股骨新假体全髋关节置换术的早期疗效和临床体会。方法：2010年5月至2011年7月,采用Tri-lock骨保留型股骨新假体行全髋关节置换术治疗31例（32髋）髋关节疾患,男18例,女13例;年龄50～77岁,平均60.5岁。其中股骨头坏死8例,新鲜股骨颈骨折13例,先天性髋关节发育不良10例。按照手术前后患者髋关节功能（Harris 标准）、术后股骨柄假体的生物学固定情况（Engh标准）、术后股骨侧的骨长入情况（按Gruen分区描述）等,对Tri-lock骨保留型股骨新假体临床应用特点进行分析。结果：术后患者均Ⅰ期临床愈合,无早期并发症发生。31例（32髋）均获随访,时间10～14个月,平均12.2个月。Harris髋关节评分从术前的38.3±4.9提高到最后随访的92.5±11.2（t=27.53,P〈0.01）.术后X线片显示关节假体位置良好,肢体长度及股骨偏心距基本恢复正常,股骨柄假体的初始固定均符合优良标准,置换后随访3个月的X线片示Gruen Ⅱ区和Ⅵ区的近段Gription微孔涂层区均出现典型的骨锚固征。结论：Tri-lock骨保留型假体设计更符合人体解剖特征,髋关节功能恢复快,骨量保留多,为治疗髋部疾患提供了一种新的更好的选择。     

Primary total hip arthroplasty with use of the modular S-ROM prosthesis. Four to seven-year clinical and radiographic results

BACKGROUND: A multicenter retrospective study was conducted to determine the clinical and radiographic results of primary total hip arthroplasty with insertion of the S-ROM modular femoral stem without cement in a series of patients who had been followed for four to seven years. Four centers participated in the study, with one contributing surgeon at each center. METHODS: Two hundred and eight consecutive patients who had a total hip arthroplasty with implantation of the S-ROM femoral prosthesis at one of the four centers during the study period were identified. Twenty-nine patients were lost to follow-up or had incomplete radiographic data, and twenty patients died from causes unrelated to the index arthroplasty. The remaining 159 patients formed the basis of this study. Sixteen of these patients had a bilateral procedure, resulting in 175 hips with complete clinical and radiographic data. The average age of the patients at the time of the index operation was fifty-nine years (range, twenty-two to ninety-three years). The duration of clinical follow-up averaged 5.3 years (range, four to 7.8 years), and the duration of radiographic follow-up averaged 4.9 years (range, four to 7.3 years). RESULTS: One patient (0.6 percent) had a failed femoral component, which was evidenced by progressive subsidence and lack of bone ingrowth. In addition, two patients (1 percent) had a revision of the acetabular component. The average Harris hip score increased from 35 points (range, 10 to 76 points) preoperatively to 91 points (range, 52 to 100 points) at the most recent follow-up examination. The radiographic evaluation revealed that 172 hips (98 percent) had stable bone ingrowth, two hips (1 percent) had stable fibrous ingrowth, and one hip (0.6 percent) had unstable fibrous ingrowth. Periprosthetic osteolytic lesions were noted in twelve hips (7 percent). The lesions were observed in the femur in eight hips, in the acetabulum in two hips, and in both the femur and the acetabulum in two hips. All femoral osteolytic lesions were localized within the greater trochanter or the proximal-medial portion of the femoral neck. No osteolytic lesions were evident distal to the stem-sleeve junction. CONCLUSIONS: Use of the modular S-ROM femoral prosthesis yielded excellent intermediate-term outcomes with respect to standard radiographic and clinical criteria. The issue regarding the theoretical increase in the rate of osteolysis due to metal debris generated at the modular femoral stem-sleeve junction was specifically addressed. We found that the rate of osteolysis in this series was not notably higher than that in other series reported in the orthopaedic literature. Although many possible factors may influence the rate of osteolysis in total hip arthroplasty, this finding suggests that the potential increase in osteolysis theoretically associated with this modular femoral implant was not observed at intermediate-term follow-up. Although longer follow-up is warranted so that the potential for osteolysis can be evaluated fully, no osteolytic lesions were evident distal to the stem-sleeve interface at the time of intermediate-term follow-up. This finding suggests that there is a circumferential seal at the modular junction of the stem that prevents the distal egress of wear debris.     

全髋关节置换术治疗成人髋关节发育不良的疗效分析

目的评价全髋关节置换术（THA）在成人髋关节发育不良（DDH）患者中的疗效。方法对2007年2月至2011年10月在本组采用THA治疗成人DDH患者33例（36髋）的患者进行手术疗效分析,术前术后肢体长度测量、Harris髋关节功能评分,以及术后随访。结果截至随访终点,共30例（32髋）获得随访,随访0.5-4.0年,平均22个月。术前双侧肢体长度差别为0.5-4.0cm（平均2.8cm）,术后双侧肢体长度差别为0.0-1.0cm（平均0.25cm）。术前Harris评分平均为42（36-78分）,术后Harris评分平均为89分（78-95分）。结论通过松解延长、采用合适的人工关节假体使用THA治疗成人DDH患者的手术效果稳定,手术技术具有可重复性,能够获得满意的疗效。     

Long-Term Survivorship of Modular Cementless Femoral Stem in Complex Primary Total Hip Arthroplasty: A Concise Minimum 15-Year Follow-Up Report

BackgroundS-ROM hip is a well-established and versatile prosthesis that offers extensive metaphyseal and diaphyseal geometries providing solutions for a variety of surgical scenarios. The aim of this study is to report on long-term survivorship and radiographic outcomes of complex primary total hip arthroplasty (THA) using a modular cementless stem (S-ROM).MethodsRetrospective consecutive study was conducted of 167 patients (167 hips): 97 males and 70 females with average age at the time of surgery of 55 years (range 22-76). All patients underwent complex THA by the senior author from 1987 to 1999. Patients were identified using a prospective database. Demographic, clinical, and surgical data were collected from health records. All patients received a cementless acetabular component with a standard polyethylene liner. The primary outcome measure was survivorship beyond 15 years using stem revision for any cause as an end point. Secondary outcome measure was rate of radiographic loosening using Engh classification.ResultsOnly 3 patients required stem revision for aseptic loosening and 1 for periprosthetic fracture. Isolated acetabular revision was undertaken in 23 of 167 patients (13.8%) due to polythene wear, osteolysis, and aseptic loosening. Proximal femoral stress shielding (zone 1, 7) was noted in 34 of 167 hips (20.4%). Stable bony ingrowth was noted in 144 hips (86.2%) and the remaining 23 hips had stable fibrous ingrowth (13.8%). Using stem “any-cause revision” as an endpoint, the mean stem survivorship was 31.5 years (95% confidence interval 31.007-31.985) with 30-year estimated survivorship of 97.6%.ConclusionIn a single designer surgeon series, S-ROM stem has stood the test of time with long-term, 30-year survivorship of 97.6% and continues to play an important role in modern hip surgery providing longevity and versatility. However, further comparative long-term studies from independent centers are needed for a definitive conclusion.Level of EvidenceIV.     

Cementless total hip arthroplasty using the modular S-ROM prosthesis combined with corrective proximal femoral osteotomy

We present the results of total hip arthroplasty using S-ROM (Depuy, Warsaw, Ind) prosthesis combined with corrective femoral transverse osteotomy for hips with proximal femoral deformity. Fourteen hips were followed up for a mean of 61 months (range, 36-95 months), with a mean age at surgery of 55 years (range, 44-69 years). The average intraoperative blood loss was 638 mL, and the average operative time was 136 minutes. The average Harris Hip Score increased from 38.0 (range, 15.0-55.7) preoperatively to 82.0 (range, 34.6-92.7) at the latest follow-up. All the hips except for 1 acquired union of osteotomy and bone ingrowth. S-ROM modular stem, which gives sufficient rotational stability at both proximal and distal parts of the osteotomy, is useful for total hip arthroplasty combined with corrective femoral transverse osteotomy.     

应用S-ROM全髋关节置换术治疗Crowe Ⅳ型髋臼发育不良

目的总结采用粗隆下截骨和生物固定型带股骨柄模块的人工关节假体治疗CroweⅣ型髋臼发育不良伴骨关节炎的效果及经验。方法回顾从2004年2月到2009年4月对12例21髋CroweⅣ型髋臼发育不良伴骨关节炎患者治疗的详细过程及疗效,记录所有的并发症。全部采用粗隆下截骨和S-ROM生物固定型人工关节假体置换术进行治疗。髋臼杯假体均植入真臼位置,7例13髋采用自体股骨头于髋臼外上方作结构性植骨,均作了粗隆下缩短截骨术,平均截骨长度为39.4 mm(35~50 mm)。结果平均随访30.8个月(6~62个月)。髋关节Harris评分明显改善(t=24.862,P0.01),从术前的平均(38.2±6.4)分(28~48分)到术后平均(82.1±8.6)分(62~94分)。术后肢体均得到不同程度的延长(t=12.099,P0.01),平均(33.5±12.7)mm(11~65 mm)。术前所有患者均有明显跛行,术后4例有轻度跛行,2例仍需扶双拐行走。19髋股骨截骨处愈合良好,2髋截骨处延迟愈合。在最后一次回访时显示髋臼假体和股骨柄假体位置均良好,无松动、下沉、断钉、骨溶解及异位骨化出现。髋关节中心平均下移了73.0 mm(46~105 mm)。结论利用S-ROM带股骨柄模块的生物固定型人工关节假体的高度适配性,加上在真臼位置加深髋臼,适当植骨,以及精确的粗隆下截骨,是治疗CroweⅣ型髋臼发育不良伴骨关节炎的良好选择。     

髋关节发育不良人工全髋关节置换术中髋臼中心重建

目的探讨髋关节发育不良(developmental dysplasia of hip,DDH)的人工全髋关节置换(total hiparthroplasty,THA)术中髋臼中心重建方法及疗效。方法 2004年1月-2010年1月,对29例(32髋)DDH患者行THA。男6例(6髋),女23例(26髋);年龄45～67岁,平均50.6岁。左侧22髋,右侧10髋。DDH按照Crowe分型标准:Ⅰ型12髋,Ⅱ型20髋。患者双下肢不等长,相差1.9～4.4 cm。髋关节Harris评分为(50.7±8.6)分。结果术后患者切口均Ⅰ期愈合;1例1髋发生髋关节后脱位。29例均获随访,随访时间2年～4年6个月,平均2.3年。术后下肢延长0.5～5.8 cm,平均2.5 cm。术后1年髋关节Harris评分为(87.7±5.9)分,与术前比较差异有统计学意义(t=21.77,P=0.00)。X线片检查示,术后1例1髋髋臼杯假体松动,1例1髋髋臼杯假体外移且外展角过大;其余患者随访期间无髋臼杯及股骨假体松动和下沉。术后1年髋臼中心水平位置、髋臼中心与泪滴连线垂直距离、髋臼垂直外展角、股骨偏心距均较术前显著改善,差异均有统计学意义(P<0.05)。结论对DDH行THA时重建髋臼中心能有效延长患者肢体,提高关节功能,降低关节置换失败率。     

无柄人工髋关节置换术的初步临床应用

目的 评价无柄人工髋关节置换术的早期随访结果,探讨其临床应用的安全性及可行性.方法 2002年2月至2007年3月,对51例56髋施行无柄人工髋关节置换术.男31例34髋,女20例22髋;年龄25～87岁,平均56.2岁.术前髋关节Harris评分平均(72.4±8.4)分.新鲜股骨颈骨折6例6髋,股骨颈骨折继发股骨头坏死4例4髋,股骨头缺血性坏死(FicatⅢ-Ⅳ期)34例37髋,强直性脊柱炎髋关节强直2例3髋,类风湿髋关节炎2例3髋,髋关节结核3例3髋.全髋关节置换50髋,半髋关节置换6髋.以Harris评分评价术后疗效,用Amstutz分区方法对X线片进行分区评价,观察假体位置及并发症情况.结果 全部病例随访2～7年,平均4.8年.髋关节Harris评分平均(92.8+3.2)分,其中优44髋、良7髋、可4髋、差1例,优良率91%.术后第2,3天发生关节脱位2例,经手法复位成功;术后40天发生感染1例,行关节腔病灶清除及持续关节腔冲洗后治愈;术后半年髋区疼痛1例,行有柄全髋关节翻修.随访期间X线片未见关节松动、脱位及螺钉松动、断裂等情况.结论 无柄人工髋关节置换术可保留股骨颈,创伤小、出血少易于于翻修,适合高龄体弱及年轻患者.早期疗效可靠,远期疗效有待进一步观察.     

Long-Term Outcomes of Total Hip Arthroplasty With Transverse Subtrochanteric Shortening Osteotomy and Modular Stem in Crowe IV Developmental Dysplasia

BackgroundThe reconstruction of high dislocation related to developmental dysplasia of the hip (DDH) remains challenging for joint surgeons. The aim of this study is to evaluate the rate of union, the revision rate, functional scores, and complications in patients with Crowe IV DDH treated with total hip arthroplasty, transverse subtrochanteric shortening osteotomy, and modular stem in an average 10-year follow-up.MethodsTwenty-eight patients (33 hips) with Crowe IV DDH who were operated on between 2008 and 2013 were followed. All patients underwent uncemented total hip arthroplasty with transverse subtrochanteric shortening osteotomy and anatomical acetabular cup implantation. The mean age was 36.6 years, and the mean follow-up period was 121 months. Clinical and radiological outcomes were evaluated.ResultsThe mean Harris Hip Score significantly improved from 47.0 preoperatively to 89.6 postoperatively. The mean limb length discrepancy was significantly reduced from 3.8 to 0.8 cm. The mean osteotomy union time was 6.8 months. At the mean follow-up of 121 months, there were 3 cases of postoperative dislocation, 2 cases of intraoperative fracture, and 1 case of posterior tibial venous thrombosis. No revision occurred, and no signs of component loosening or migration were observed at the last follow-up.ConclusionCrowe IV DDH patients treated with transverse subtrochanteric shortening osteotomy, modular stem, and anatomic acetabular component insertion can have satisfactory and reliable 10-year clinical outcomes.     

Use of a cementless modular implant for arthroplasty in developmental dysplasia of the hip: Early results

Total hip arthroplasty for osteoarthritis secondary to developmental dysplasia of the hip (DDH) is technically difficult due to the abnormal anatomy involved. Surgery may be facilitated by using a modular femoral prosthesis, which allows intra-operative variations in neck length and version to accommodate final acetabular position. The aim of this study was to assess our early results with the S-ROM hip (DePuy), a cementless modular femoral implant, for arthroplasty in patients with DDH. We performed 22 total hip replacements on 20 patients over a three and a half year period. Ten patients had had previous osteotomies performed, including two of whom had Ganz peri-acetabular osteotomies performed in our centre. Follow-up ranged from 6 to 44 (mean 19.6) months. Harris hip scores improved from an average of 42 points pre-operatively to 90 points post-operatively. No radiographic evidence of osteolysis was seen around the femoral implant. Two patients required revision of their acetabular components. Both had satisfactory outcomes. Our early results with the S-ROM femoral prosthesis correlate well with those from other studies involving arthroplasty for DDH. This implant is extremely versatile and easy to use in this complex patient population.     

Total hip arthroplasty (S-ROM stem) and subtrochanteric osteotomy for Crowe type IV developmental dysplasia of the hip

Background:

Developmental dysplasia of the hip (DDH) in adults with severe pain and disability is best treated by total hip arthroplasty (THA). The purpose of this study was to retrospectively evaluate the outcomes of subtrochanteric shortening osteotomy combined with THA using S-ROM stem for those severe patients with a special focus on the effect of two shapes in the subtrochanteric osteotomy ends: Oblique and transverse.

Materials and Methods:

Twenty one cases with mean age of 43.6 years who met inclusion criteria and were operated between February 2007 and February 2012 were included in the study. Those cases had been divided into two groups (oblique vs. transverse) and all records between the two groups were analyzed.

Results:

The Harris hip score significantly improved from 30.6 (range 18–59) preoperatively to 91.2 (range 87–98) postoperatively by the latest followup. Complications including one deep venous thrombosis, one intraoperative fracture of femur and two dislocations occurred while they were addressed properly afterward. The oblique group showed significant advantages in operative time, union time and additional fixation in comparison with the transverse group.

Conclusions:

In the primary THA for the treatment of irreducible DDH, subtrochanteric oblique osteotomy combined with the freely-rotatable S-ROM stem provided favorable short term outcomes by affording both morphological and functional advantages.     

Hybrid total hip arthroplasty using specifically-designed stems for patients with developmental dysplasia of the hip. A minimum five-year follow-up study

A 4-U hybrid total hip arthroplasty (THA) system was specifically designed for patients with developmental dysplasia of the hip (DDH). Straight stem with an appropriate offset and various size variations are advantages. We followed 128 hips in 124 patients, 13 men and 111 women, for a mean of 6.5 years (range, 5.0–7.5 years). Two acetabular and femoral components in two patients had been revised for infection, one acetabular component had been revised for recurrent dislocation, and one femoral component had been revised for periprosthetic femoral fracture. None of the acetabular or femoral components were revised for loosening or were found to be loose at follow-up. The Harris hip score increased from a preoperative average of 42 points to 88 points at the most recent follow-up. Primary THA using the 4-U system had a good mid-term result in patients with DDH. This system could be applied for all patients including those with the narrowest and deformed femurs.     

国产表面多孔解剖型全髋关节置换术的远期随访结果

目的 评估国产表面多孔解剖型全髋关节置换术的远期疗效.方法 1990年1月至1998年4月接受国产表面多孔解剖型全髋关节置换术的95例患者经电话核实、预约及直接去患者家中随访,同时在当地医院拍摄标准髋关节正侧位X线片.随访指标:依据Harris评分评价临床疗效,应用Gruen和DeLee & Chamley分区法对股骨柄和髋臼杯的正侧位X线影像进行分析.结果 50例失随访,16例死亡.29例(37髋)得到随访,随访时间11～17年,平均13.8年.随访时4例4髋已得到翻修,其余患者随访时Harris评分6～98分,平均70.3分;其中优7例10髋,良4例6髋,中5例7髋,差9例10髋,优良率48.5%.6髋(18.2%)需行翻修,主要原因为假体无菌性松动及移位.按照Harris评分标准,患者术髋无疼痛或轻度疼痛18例,中度以上疼痛6例(偶服比阿司匹林强的镇痛剂),病废1例(因疼痛被迫卧床,卧床也有剧痛).X线片显示股骨柄下沉9髋,平均下沉9.3mm;股骨柄周围出现透光带12髋;股骨柄周围骨溶解10髋;髋臼假体侧出现透光带13髋;假体多孔表面层有不同程度脱落2髋.结论 20世纪90年代应用的国产表面多孔解剖型全髋关节置换术可有效改善患者功能,但其远期疗效还有待进一步提高.假体无菌性松动是其最主要的远期并发症.