Long-Term Results of Cementless Total Hip Arthroplasty With Subtrochanteric Shortening Osteotomy in Crowe Type IV Developmental Dysplasia

Background

When surgeons reconstruct hips with a high dislocation related to severe developmental dysplasia of the hip (DDH) in total hip arthroplasty (THA), archiving long-term stable implant fixation and improving patient function and satisfaction remain challenging. The purpose of this study was to evaluate the 10-year outcomes of transverse subtrochanteric shortening osteotomy in cementless, modular THA in Crowe type IV-Hartofilakidis type III DDH.

全髋关节置换术治疗Crowe Ⅳ型髋关节发育不良患者及围手术期并发症分析

目的:探讨人工全髋关节置换术治疗Crowe Ⅳ型成人髋关节发育不良的疗效及围手术期并发症。方法:2000年3月至2010年3月,对19例(23髋)Crowe Ⅳ型成人髋关节发育不良患者进行人工全髋关节置换术,其中男5例,女14例;年龄41～72岁,平均61.3岁。髋臼侧采用小臼杯结合髋臼内陷技术安置臼杯假体,股骨侧采用粗隆下短缩截骨放置股骨假体。采用Harris评分评价术后髋关节功能。结果:所有患者获随访,时间1～8年,平均4.2年,术后X线片显示髋臼假体均位于真臼内,无髋臼假体松动。股骨侧截骨处均骨性愈合。Harris评分由术前平均(34.0±6.9)分提高至末次随访的(85.0±7.5)分。发生围手术期并发症11例,包括股骨劈裂骨折3例,神经并发症3例,截骨延迟愈合2例,术后脱位3例。结论:采用小臼杯、假体内陷技术、股骨短缩截骨对Crowe Ⅳ型DDH患者行全髋关节置换可以重建关节功能,恢复下肢长度,早期疗效满意,但并发症发生率高。后期疗效有待进一步观察。     

A Reduction Technique of Arthroplasty Without Subtrochanteric Femoral Shortening Osteotomy for the Treatment of Developmental High Dislocation of Hip: A Case Series of 28 Hips

In total hip arthroplasty for the treatment of developmental dysplasia of the hip (DDH) with high hip dislocation, it can be technically challenging to locate the true acetabulum and restore limb length without subtrochantric femoral shortening osteotomy. We explored and described total hip arthroplasty without subtrochanteric femoral shortening osteotomy in 28 hips with Crowe type III and IV dislocation by intravenous injection of rocuronium at 0.9 mg/kg 1 minute before reduction and hip reduction combined with continuous strong traction of the affected limb with patients in a position with hip and knee flexion. All patients did not show dislocation, prosthesis loosening, and other severe complications. It is thus a safe and feasible reduction technique for arthroplasty of Crowe type III or IV dislocation of DDH.     

Cemented Total Hip Arthroplasty With Transverse Subtrochanteric Shortening Osteotomy for Crowe Group IV Dislocated Hip

A consecutive series of 19 cemented total hip arthroplasties with transverse subtrochanteric shortening osteotomy was performed for Crowe group IV hip, with a mean follow-up of 38 (6-96) months. The osteotomy sites were covered with onlay grafts of the excised fragments. The conditions of the osteotomy sites were classified into 3 types according to the presence of a remaining gap and cement interposition within it. Three cases had a noticeable gap, and 2 of them showed cement interposition. All osteotomy sites became united involving the onlay grafts, with an average time to union of 4.9 (3-8) months. Our findings suggest that cemented total hip arthroplasty with subtrochanteric transverse osteotomy provides satisfactory short-term results without major complications for Crowe group IV hip.     

Treatment of high hip dislocation with a cementless stem combined with a shortening osteotomy

Introduction

The purpose of this study was to review the clinical and radiographic outcomes and report the major complications in a group of hips with Crowe type IV developmental dysplasia that underwent reconstruction with a cementless total hip arthroplasty and a transverse subtrochanteric shortening osteotomy fixed with locking compression plate and screws.

Method

Fifteen consecutive patients (21 hips) who had coxarthrosis secondary to Crowe Group IV developmental dysplasia of the hip were treated with a cementless prosthesis and a transverse subtrochanteric osteotomy fixed with locking compression plates at a mean age of 41. The mean follow-up period was 5?years. The acetabular cup was placed in the position of the anatomical hip center in every patient. Subtrochanteric femoral shortening osteotomy was fixed with plates and screws in all patients.

Results

The mean Harris hip score improved from 36.2?±?9.8 points to 90.8?±?2.5 points. Trendelenburg sign was positive in seven hips and two patients complained about continuing anterior thigh pain at the final follow-up. There was no infection. No cases of nonunion were encountered. Two patients had dislocation on early postoperative period (15th and 20th postoperative day). Of these patients, femoral head was changed to 28?mm with stem revision in one patient, and one had acetabular component revision with use of constrained acetabular liner. There was one permanent sciatic nerve palsy. One patient had implant related pain during lying laterally. Plate and screws were removed at postoperative 16th month.

Conclusion

Cementless total hip arthroplasty combined with subtrochanteric osteotomy for the treatment of patients with Crowe Group IV developmental dysplasia of the hip is an effective technique to reduce the hip to its original acetabular location and restore the rotational deformities. Plate and screw fixation is a viable option for a secure and stable fixation of femoral stem after subtrochanteric osteotomy.     

Crowe Ⅳ型髋关节发育不良的全髋关节置换术

目的 探讨全髋关节置换术治疗成人Crowe Ⅳ型髋关节发育不良(developmental dyspla-sia of the hip,DDH)的方法并评价其疗效.方法 1997年10月至2009年1月,应用全髋关节置换术治疗Crowe Ⅳ型DDH患者15例20髋,其中5例双侧、10例单侧.18髋采用Secur-Fit股骨假体,2髋采用Corail股骨假体.转子下斜行截骨6髋,髋臼底磨穿5髋,均行股骨头植骨.结果 15例中早期死亡1例(双髋),失访2例(2髋),余12例16髋获得平均44.2个月(5～92个月)随访.术后发生出血性休克1例,脂肪栓塞1例,术后脱位2例,股骨上端骨裂2例.转子下斜行截骨6髋中,1髋失随访,2髋分别于术后18和23个月随访时仍可见骨折线,下肢行走无异常,其余3髋骨愈合.髋臼底植骨5髋,除1髋失访外,其余均获得愈合.术后X线片显示髋臼假体均位于真臼内,完全骨性覆盖,无髋臼假体松动.术后双下肢长度差平均1.1 cm(0～2.2 cm).末次随访Harris评分由术前平均(24.7±5.7)分(15～32分)提高至末次随访(85.6±5.6)分(80～94分),差异有统计学意义.结论 对Crowe Ⅳ型DDH患者行全髋关节置换术时,良好的真臼暴露、加深髋臼、股骨短缩、斜行截骨及使用Secur-Fit假体能提高全髋关节置换术的治疗效果.     

Total Hip Arthroplasty With Subtrochanteric Shortening Osteotomy in Patients With High Hip Dislocation Secondary to Childhood Septic Arthritis: A Matched Comparative Study With Crowe IV Developmental Dysplasia

BackgroundTotal hip arthroplasty (THA) with subtrochanteric shortening osteotomy (SSO) is performed to manage hips with high dislocations. We compared outcomes of THA with SSO in patients with high hip dislocation resulting from childhood septic arthritis and Crowe IV developmental dysplasia of the hip (DDH).MethodsWe reviewed 60 THAs with SSO performed between May 1996 and December 2013. Thirty-one cases were classified as sequelae of childhood infection and 29 as DDH. Twenty-five hips were selected for each group after the propensity score was matched with preoperative demographics and leg length discrepancy (LLD). Clinical scores, complication and reoperation rates, radiographic results, and survivorships were compared. The mean duration of follow-up was 12.3 (range 5-22) years.ResultsThe average correction in LLD was 2.5 cm for childhood infection and 3.6 cm for DDH (P = .002). The infection group received more transfusions (mean 3.3 vs 2.0 units, P = .002), required more time for union of osteotomy site (mean 6.8 vs 5.2 months, P = .042), and reported lower Harris Hip Score (mean 85.1 vs 91.3, P = .017). Reoperations were performed in 11 (44%) previously infected hips and 3 (12%) DDHs (P = .012). Kaplan-Meier survivorship with an endpoint of revision for any reason was lower in the infection group (83.6%) than in the DDH group (100%) at 10 years (log rank, P = .040).ConclusionTHA with SSO in high hip dislocation secondary to childhood septic arthritis demonstrated less favorable clinical outcomes with increased risks of complication, compared with those performed in Crowe IV DDH with similar degree of chronic dislocation.     

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.     

Treatment of Crowe Type-IV Hip Dysplasia Using Cementless Total Hip Arthroplasty and Double Chevron Subtrochanteric Shortening Osteotomy: A 5- to 10-Year Follow-Up Study

Background

The purpose of this study was to evaluate the functional and radiographic results of patients with Crowe type-IV hip dysplasia treated by cementless total hip arthroplasty and double chevron subtrochanteric osteotomy.

股骨转子下截骨在CroweⅣ型髋关节发育不良全髋关节置换中的应用

目的 探讨股骨转子下横行短缩截骨在Crowe Ⅳ型髋关节发育不良全髋关节置换中的作用.方法 2001年2月至2007年2月对12例Crowe Ⅳ型髋关节发育不良患者行股骨转子下横行短缩截骨的全髋关节置换.男3例,女9例;年龄45～65岁,平均54岁.左髋5例,右髋6例,双髋1例.术前患肢短缩1.8～5.0cm,平均3.5 cm.4例中度跛行,8例重度跛行.于术后3、6、12个月,以后每年随访一次.摄X线片观察截骨愈合、假体下沉及松动情况.观察患者跛行情况,髋关节功能评价采用Harris评分.结果 全部患者随访2～7年,平均3.0年.截骨长度1.5～4.2 cm,平均2.2 cm.无坐骨神经损伤.截骨均愈合,愈合时间3～15个月,平均5.3个月.末次随访时3例轻度跛行,4例中度跛行,无重度跛行患者.髋关节Harris评分从术前平均36分(30～60分)提高到末次随访平均83分(75～95分).2髋分别于术后5年和7年发生股骨假体下沉,下沉高度分别为3 mm和6 mm.无假体松动及术后感染.结论 对Crowe Ⅳ型髋关节发育不良患者实施全髋关节置换术时行转子下横行短缩截骨,为真臼的暴露、臼杯的准确安装、增加股骨假体柄直径、矫正股骨假体柄前倾角创造了条件,可避免神经损伤.     

Comparison of Trochanteric Slide and Subtrochanteric Shortening Osteotomy in the Treatment of Severe Hip Dysplasia: Mid-Term Clinical Outcomes of Cementless Total Hip Arthroplasty

BackgroundThe aim of this study is to compare clinical results of Crowe type III-IV developmental dysplasia of the hip (DDH) patients who underwent total hip arthroplasty with either trochanteric slide osteotomy (TSO) or subtrochanteric shortening osteotomy (SSO).MethodsThe patients who underwent cementless total hip arthroplasty with femoral shortening osteotomy due to Crowe type III/IV DDH between 2004 and 2014 and completed at least 5 years of follow-up were retrospectively analyzed. The patients were grouped according to the type of shortening osteotomy as either TSO or SSO. Preoperative and postoperative clinical evaluation included Harris Hip Score, Visual Analogue Scale pain, leg length discrepancy, and the presence of Trendelenburg sign. The clinical outcome measures and complication rates were compared in terms of osteotomy type.ResultsThe TSO group consisted of 34 patients (43 hips) and the SSO group consisted of 40 patients (51 hips). The SSO group (96.1%) had a slightly higher 5-year survival of the implant compared to TSO (93%) without statistical significance (P = .18). No significant difference was detected between the groups in terms of clinical outcomes. Complication rates did not significantly differ between the groups except for the lack of bony union which was significantly higher in TSO (P = .006) but this difference did not transform into clinical significance since 5 of 6 patients who did not have a bony union in the TSO group were symptom-free with a fibrous union.ConclusionTSO and SSO provide similar clinical outcomes at mid-term follow-up in the management of Crowe III-IV DDH by cementless total hip arthroplasty. Both techniques can be used safely depending on the surgeon’s preference.Level of EvidenceLevel III, Therapeutic, Case-control study.     

Cementless Total Hip Arthroplasty With Modified Oblique Femoral Shortening Osteotomy in Crowe Type IV Congenital Hip Dislocation

Midterm results of cementless total hip arthroplasty in patients with Crowe type IV congenital dislocation of the hip were evaluated. A modified oblique subtrochanteric shortening osteotomy was used in all patients. A cylindrical femoral stem was used in all patients to stabilize the osteotomy. Mean follow-up was 82 months in 20 hips of 16 patients. Mean Merle D'Aubigné pain score increased from 2.52 to 5.65 points, function score improved from 4.0 to 5.3 points, and mobility score improved from 3.95 to 5.35. Mean greater trochanter height relative to the estimated hip center was 6.8 ± 2.0 cm preoperatively and − 1 ± 0.2 cm postoperatively. Complications were dislocations in 3 patients, which were successfully managed without redislocation and fracture of greater trochanter in 3 patients, which healed uneventfully in 2 but with residual Trendelenburg gait in one. Total hip arthroplasty with modified oblique subtrochanteric shortening osteotomy is an effective technique for the treatment for Crowe type IV hip dislocation.     

股骨转子下叠加缩短截骨在CroweⅣ型成人髋脱位全髋置换术的应用

目的总结CroweⅣ型成人髋脱位采用股骨转子下叠加缩短截骨行全髋置换术的方法与疗效。方法2000年1月至2003年12月，收治8例（11髋）CroweⅣ型成人髋脱位患者，男3例，女5例；年龄40-57岁，平均48岁；单髋5例，双髋3例；先天性发育不良7例，陈旧性髋关节结核1例。假体臼杯为金属杯＋聚乙烯内衬设计，其中Duraloc（Depuy，Warsaw，USA）8髋，Pressfit SⅡ（LINK，Ger-many）3髋。股骨柄假体采用AML（Depuy，Warsaw，USA）4髋，Summit（Depuy，Warsaw，USA）4髋，Ribbed（LINK，Germany）3髋。假体均采用生物学固定。手术均采用股骨转子下叠加缩短截骨，并附加断端“V”形截骨，其中6髋因最小号股骨柄假体置 入困难，而附加股骨劈开成形术。结果无一例发生感染、脱位等并发症，无一例行臀大肌或臀中、小肌等短肌松解。转子下平均缩短截骨长度为4．5cm（4～6cm），无一例因截骨过短，导致股骨头假体复位困难或坐骨神经牵伸伤；也无一例因截骨过长，导致股骨头假体松弛性脱位。术后X线片示臼杯均位于真臼区，股骨柄假体的初始固定均优良，截骨断端在3～6个月后均骨性愈合。测量显示患肢平均延长3cm（2．5～3．5cm）。随访3～7年，髋关节Harris评分从术前的25～32分改善至1年后的90～98分。无一髋假体显示有X线松动和邻近骨溶解。结论股骨转子下叠加缩短截骨术可用于CroweⅣ型成人髋脱位的全髋置换术治疗。     

Total Hip Arthroplasty With the Wagner Cone Femoral Stem in Patients With Crowe IV Developmental Dysplasia of the Hip: A Retrospective Study

BackgroundThe aim of this study is to assess treatment of Crowe type IV hip dysplasia with the Wagner cone femoral stem combined with transverse subtrochanteric shortening osteotomy and augmenting the osteotomy site using the intercalary segment as a strut autograft.MethodsOne hundred twenty-seven hips of 91 patients diagnosed with Crowe type IV hip dysplasia and treated with total hip arthroplasty using the Wagner cone stem combined with transverse subtrochanteric shortening osteotomy were retrospectively evaluated by clinical and radiographic outcomes as well as complications.ResultsThe mean follow-up was 8.4 years. The Harris Hip Score and the Western Ontario and McMaster University Osteoarthritis Index scores were significantly improved postoperatively (P = .000). Intraoperative femoral cracks were observed in 70 hips (55.1%) and all femurs healed smoothly. Femoral cracks did not have a significant effect on clinical outcomes, except for heterotopic ossifications (P = .032). The probability of 10-year survivorship of the components free of revision for any reasons as end point was 94.5%; when only the femoral components were considered the survivorship was of 96.9%.ConclusionTransverse subtrochanteric shortening and augmenting the osteotomy site using the intercalary segment of bone resected from the shortened femur with the Wagner cone stem is an effective and reliable technique in the management of total hip arthroplasty in Crowe type IV hip dysplasia. Stable and firm placing of the femoral component which leads to an increased frequency of intraoperative femoral cracks does not have an unfavorable effect on clinical and radiological outcomes.     

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。     

Minimum 10-Year Results of Cementless Ceramic-On-Ceramic Total Hip Arthroplasty Performed With Transverse Subtrochanteric Osteotomy in Crowe Type IV Hips

BackgroundTotal hip arthroplasty (THA) performed for developmental dysplasia of the hip is a technically difficult procedure with a high complication rate, especially in the presence of completely dislocated hips. This study aimed to evaluate at least 10 years of follow-up results of cementless, ceramic-on-ceramic (CoC) THA performed with transverse subtrochanteric osteotomy in Crowe type IV hips.MethodsWe retrospectively reviewed 50 patients’ 67 hips that underwent CoC, cementless THA with transverse subtrochanteric osteotomy between 2008 and 2011. Clinical and radiological data of the hips were examined. Clinical results were evaluated using the Harris Hip Score and the Western Ontario and McMaster Universities Osteoarthritis Index.ResultsThe mean Harris Hip Score improved from 22.9 ± 9.9 preoperatively to 94.1 ± 8.1 at the final follow-up (P < 0.001). The median Western Ontario and McMaster Universities Osteoarthritis Index score improved from 72 (interquartile range: 17) preoperatively to 2 (interquartile range: 17) postoperatively (P < 0.001). The preoperative mean leg length discrepancy was improved from 4.9 ± 1 cm to 1.5 ± 1 cm in unilateral cases at the last follow-up (P < 0.001). Revision surgery was required because of nonunion in two patients, prosthetic infection in one patient, and aseptic femoral loosening in the other patient. The overall ten-year survival rate was 94% for femoral stems and 98.5% for acetabular components as per Kaplan-Meier survival analysis.ConclusionTransverse subtrochanteric shortening osteotomy combined with using cementless acetabular and femoral components with a CoC bearing surface promises successful clinical results and high prosthesis survival in the treatment of Crowe IV hips at long-term follow-up.     

Total Hip Arthroplasty for Crowe Type IV Hip Dysplasia: Surgical Techniques and Postoperative Complications

Total hip arthroplasty (THA) of Crowe type IV developmental dysplasia of the hip (DDH) is challenging. Although traditional (lateral, posterolateral, and posterior) THA approaches have been used with great anatomic success, they damage periarticular muscles, which are already quite weak in type IV DDH. The recently developed direct anterior approach (DAA) can provide an inter‐nerve and inter‐muscle approach for THA of type IV dysplasia hips. However, femur exposure with the DAA could be difficult during surgery and it is hard to apply femoral shortening osteotomy. THA techniques used for type IV DDH include anatomic hip center techniques (true acetabular reconstruction) and high hip center techniques, wherein an acetabulum is reconstructed above the original one. Although anatomic construction of the hip center is considered “the gold standard” treatment, it is impossible if the anatomical acetabular is too small and shallow. Procedures used to support type IV DDH reduction with anatomic hip center techniques include greater trochanter osteotomy, lesser trochanter osteotomy, and subtrochanteric osteotomy. However, these techniques have yet to be standardized, and it is unclear which is best for type IV DDH. One‐state and two‐state non‐osteotomy reduction techniques have also been introduced to treat type IV DDH. Potential complications of THA performed in patients with type IV DDH include leg length discrepancy (LLD), peri‐operative femur fracture, nonunion of the osteotomy site, and nerve injury. It is worth noting that nowadays an increasing number of Crowe type IV DDH patients are more sensitive to postoperative LLD.     

Subtrochanteric femoral shortening osteotomy in total hip arthroplasty for high-riding developmental dislocation of the hip

A surgical technique, which uses a transverse osteotomy, for subtrochanteric femoral shortening and derotation in total hip arthroplasty for high-riding developmental dislocation of the hip is described. Anteversion is set by rotating the osteotomy fragments, and torsional stability is augmented with allograft struts and cables when indicated. Eight patients with 9 total hip arthroplasties were followed for an average of 43 months (range, 24–84 months). Good to excellent results were obtained in 87% of patients (7 of 8). Eight of 9 osteotomies (89%) demonstrated radiographic evidence of healing at an average of 5 months. One patient had an asymptomatic nonunion of the osteotomy site but still had a good overall clinical result. Another patient suffered fatigue failure of a distally ingrown porous device, which necessitated revision total hip arthroplasty 18 months after surgery. Subtrochanteric osteotomy in total hip arthroplasty for developmental dislocation of the hip allows for acetabular exposure and diaphyseal shortening while facilitating femoral derotation. Furthermore, proximal femoral bone stock is maintained and some of the potential complications of greater trochanteric osteotomy may be avoided.     

非股骨短缩截骨全髋关节置换术治疗Crowe Ⅳ型髋关节发育不良

目的探讨Crowe Ⅳ型髋关节发育不良(DDH)伴骨性关节炎患者采用非股骨短缩截骨技术的全髋关节置换术(THA)及其临床疗效。方法自2004年12月至2007年9月间收治的10例11髋Crowe Ⅳ型DDH并发髋关节骨性关节炎患者,年龄20～44岁(平均34.6岁),术前Harris评分(45.2±7.8)分,肢体短缩(3.9～6.1)cm(平均5.1cm)。所有患者均采用后外侧入路,利用自体患侧截除股骨头于真臼位置植骨重建髋臼,通过松解髋周软组织和保留适当股骨距,同时配合良好麻醉肌松最终复位髋关节。术后早期患者采取屈髋屈膝位松弛坐骨神经和股神经,仅行下肢肌肉静力收缩训练,随后在不引起下肢感觉及运动异常的情况下逐渐减少屈髋及屈膝的角度,2周后不限制其活动。术后早期患者采取屈髋屈膝位松弛坐骨神经和股神经,随后逐渐减少屈髋及屈膝的角度。观察术中出血量、术后引流量、肢体延长长度和术后并发症和早期功能恢复情况,比较手术前、后的Harris评分并行影像学评估。结果随访时间8～28个月(平均17.1个月)。所有患者术中出血量(579±157)ml,术后引流量(261±75)ml。术后X线显示假体未见位置不良,髋臼假体均位...     

Subtrochanteric shortening with overlapping femoral resection in total hip arthroplasty for Crowe type IV adult dislocation of the hip

Objective: To summarize the surgical technique and clinical outcomes of subtrochanteric shortening with overlapping femoral resection in primary total hip arthroplasty (THA) for Crowe type IV adult dislocation of the hip (ADH). Methods: From January 2000 to December 2005, 12 patients with ADH (15 hips) were treated with primary cementless hip arthroplasty using the method of subtrochanteric shortening with overlapping femoral resection. There were three male and nine female patients (nine unilateral and three bilateral hips) with an average age of 56 years (range, 41–75). Subtrochanteric shortening with overlapping femoral resection and ‘V’ shaped derotational osteotomy were performed in all cases without soft tissue cutting release. Proximal femoral shaft splitting was performed as an adjunct in 10 hips. Results: The mean follow‐up time was 6 years (range, 3–8). There were no infections, nonunion, malunion, dislocation or nerve injury of traction. Postoperative X‐ray films showed that the acetabular cups were placed in anatomical position with 95% coverage of the acetabulum. Furthermore, initial stability of the femoral stem fixation was satisfactory and all osteotomies healed in 10–15 weeks. The Harris hip score had improved from 25–32 to 88–98 at one year after surgery (P < 0.01). All acetabular and femoral components were judged to be osteointegrated and well‐fixed during follow‐up. No components have needed revision. Conclusions: Subtrochanteric shortening osteotomy is a safe and predictable method for restoring the anatomic hip center in Crowe type IV ADH. The clinical outcomes of treating Crowe type IV ADH with THA were satisfactory.