Purpose of the study is to investigate the outcome of the patients with Perthes disease who have had a surgical dislocation of their hip for the treatment of resultant symptoms from the disease process. Retrospective review of consecutive patients treated with surgical dislocation of the hip for Perthes disease. Review of clinical case notes and radiological imaging. Patient outcome was assessed at follow-up. Between 2010 and 2015, 31 cases of surgical hip dislocation were performed for Perthes disease at our institution by 2 senior surgeons. Age range at time of surgery was 12–33. Male:female ratio was 13:18; right:left ratio was 15:17. Age at the time of Perthes diagnosis was between 3 and 13 years, with 3 diagnosed retrospectively. Mean follow-up was 18months. All patients had an EUA and arthrogram while 61.3%(19/31) had previous surgery for Perthes. 71%(22/31) required a labral repair, 6.5%(2/31) had a peri-acetabular osteotomy at the time of surgery and 3.2%(1/31) required a proximal femoral valgus osteotomy. 22.5%(7/31) required microfracture (femoral head or acetabulum): all of whom had evidence of contained area of degenerative changes on preoperative MRI. 64.5%(20/31) had the trochanteric screws removed. Complications included 1 greater trochanter non-union, 1 pain secondary to suture anchor impinging on psoas tendon, 1 AVN leading to early THR 12 months post-op. Another 2 had further deterioration of degenerative changes and pain leading to THR 18 and 24 months post-op. All 3(9.7%) had microfracture at the time of the dislocation for established degenerative change and also required custom made prostheses. Surgical hip dislocation is an option in treating Perthes patient with resultant symptoms such as impingement. Improved outcome is seen in patients who are younger with a congruent hip joint in contrast to those with established degenerative change evident on MRI / intraoperatively and have an arrow shaped femoral head

Aims

Developmental dysplasia of the hip (DDH) can be managed effectively with non-surgical interventions when diagnosed early. However, the likelihood of surgical intervention increases with a late presentation. Therefore, an effective screening programme is essential to prevent late diagnosis and reduce surgical morbidity in the population.

Surgical dislocation of the hip joint using the technique developed by Rheinhold Ganz, is a relatively new method for surgical exposure of the hip. A review of 8 cases that underwent surgical dislocation of the hip joint was undertaken, to assess the short term outcome, complications associated with the procedure and to identify some of the indications for this technique. This is a retrospective analysis of surgical dislocation in two centers undertaken by the same surgeon with a maximum follow up period of one year. Surgical dislocation of the hip allows access to the hip joint with some associated morbidity due to the surgical exposure but there were no cases of avascular necrosis in the short term follow up. We were able to define specific pathological conditions affecting the hip where there is significant improvement following treatment using this method of exposure of the hip joint. Good exposure of the hip joint is obtained via surgical dislocation so allowing good access for surgical intervention. There is an associated morbidity with the technique but this method of hip exposure allows an alternative to hip arthroscopy and allows easier access to the joint for the treatment of intra articular pathology

Introduction

Orthopaedic rehabilitation of adolescences and young adults with high dislocation of the femur is rather challenging. The role of palliative salvage procedures is controversial enough in the cohort of patients.

The aim of this study was to evaluate the results of total hip arthropiasty in osteoarthritis secondary to congenital hip disease. During the period 1986 to 1999, we performed 48 hip replacements with congenital hip disease. According to classification of Chanophylakidis there were 18 dysplastic hips without dislocation, 17 hips with low dislocation and 12 hips with high dislocation The mean age of the patients was 49 years (range from 31 to 64) Depended on the pathology of each case, different types of prostheses or combinations of them were used. The acetabular cup was placed in the anatomic position and in the majority of cases a component of 22 aim was used. In 28 cases the bottom of the acetabulum was fractured and protruded in order to fit the cup (acetabuloplasty). In these cases copious amounts of auto- and aiiografts were used and the cup was fixed with PMMA, Special femoral stems for CDH were used and in the majority of cases they were fixed with PMMA. In 17 cases with good acetabular bone stock and good femoral canal a standard prosthesis was used without PMMA. In 31 cases the hip was approached after osteotomy of the grater trochader and in 17 cases an anterolateral approach was used. Intra-operatively there were many problems and difficulties but we had no true complications. Early postoperative complications presented in eight patients and had to do with 2 haematomas, 3 DVT, 1 mild PE and 2 superficial infections. There was no case of deep infection, neurovascular damage, dislocation or fracture. The late results after a mean of 6, £ years were very satisfaaory. There was improvement of the HIP SCORE from 38 to 83 and subjective satisfaction of nearly all the patients. The late complications were limited and they concerned three migrations of the acetabular cup, one aseptic loosening of the femora) stem and one extensive osteoiysis the proximal femur. All the above cases were revised successfully

Evidence has emerged that femoroacetabular impingement (FAI) may instigate early osteoarthritis of the hip and that symptomatic patients can be successfully treated by addressing the underlying pathomorphology. There is also an increasing body of evidence to support FAI as one major cause of hip and groin pain, decreased mobility and reduced performance in athletes. This study therefore aimed to investigate if professional athletes with FAI can resume to their sports after a surgical dislocation of the hip and continue their professional career up to a mid-term follow-up. We identified fifteen professional athletes (21 hips, all cam-type or mixed-type FAI, mean alpha-angles of 68°) who underwent a surgical hip dislocation for FAI treatment. Surgery was performed by the senior author in all cases. The patients were evaluated by postal survey at a mean of 47 months (range, 9–79) postoperatively. The evaluation inquired about the type and level of sports, subjective ratings, and clinical outcomes (Hip Outcome Score [HOS], SF-12, UCLA activity scale, FAI sports scale [FSS], VAS pain). At follow-up, 14 of the 15 patients (93%) were still professionally sports active. Twelve athletes maintained their levels and two were active in minor leagues. Eleven patients (75%) were satisfied with their hip surgery and their sports ability. Mean activity levels were 7.5 according to the self-developed FSS and 9.7 according to the UCLA scale, respectively. Mean scores of the HOS ADL and Sport subscales were 92.6 and 85.2, respectively. Mean scores of the SF-12 PCS and MCS were 50.7 and 56.1, respectively. Pain levels during sports were rated to be 2.0 according to the VAS. In conclusion, this study highlighted that professional athletes suffering from FAI can successfully return to professional sports after a surgical dislocation of the hip. All athletes except one (93%) could continue their professional career up to the follow-up four years after surgery. Clinical outcomes in terms of subjective ratings and scores were encouraging, nevertheless, longer-term follow-up has to show if results deteriorate with time considering the exhaustive joint use related to a professional sports career

Introduction: Cases of developmental dislocation of the hip occur after walking age because of late or missed diagnosis and failed conservative or operative treatment. Up to now there is no consensus on the treatment of DDH after walking age. The purpose of this retrospective study was to evaluate the results of operative treatment in DDH after walking age in our patient population and to describe the treatment strategies and operative techniques used. Material and Methods: Forty-two patients presenting 54 cases of DDH after walking age were operated on in our clinic between 1985 and 1997. There were 34 female and 8 male patients, with an average age at the time of operation of 47 months (range: 14 – 151 months). The parameters studied were the type of DDH according to Ts, the preoperative AC- angle, the postoperative AC- and CE- angles as well as the radiological outcome using the Severin classification. Results: Based on the Ts classification we found 18 cases of type II, 22 cases of type III and 14 cases of type IV dislocations. Each hip had an average of 1.4 operations. The average preoperative AC- angle was 38.2 degrees (range: 22–50) whereas the average AC- angle in the last radiographic follow up was 22.2 degrees (range:5–10). The statistical analysis showed that the AC angle at the last follow up was significantly (p< 0,001) smaller than in the preoperative radiographs. The classification according to Severin showed class I in 28 cases, class II in 15 cases, class III in 8 cases and class V in 3 cases. Conclusion: Although our study presents the results after a mid-term follow up the radiological results favor our clinical experience that a single stage combined procedure consisting of open reduction, pelvic osteotomy as well as a corrective osteotomy within the proximal femur with subsequent shortening should be recommended

Purpose To analyse the outcome of twenty children (24 hips), C.P. patients with established dislocation of the hips submitted to surgical reduction. Methodology Betwen 1998 to 2002, a retrospective review of twenty children, (24 hips) with spastic or mixed quadriplegic cerebral palsy with established hip dislocation was undertaken,. Patients were operated by the same technique: – open reduction and capsulorraphy (anterior approach) plus proximal femoral VDRO with shortening of the femur and psoas tenotomy (lateral approach). Follow-up was 4.6 years (2–6 y). Age average 9.4 years, (range 4y 8m to 13y 6m). There were 12 boys and 8 girls. All patients were mentally retarded and nonambulatory. All patients were clinically evaluated, pre and postoperatively, and pelvic AP X-rays were taken in a standard supine position, in order to determine the percentage of uncover-age of the femoral head (Reimer’s method) and the acetabular index. Results The results were generally good with a postop migration percentage of 21,1% (1 hip subluxated) and a better acetabular index. As complications we had 1 fracture, 3 pressure sores and 1 epiphysiodesis. As clinical evaluation we had difficulty in wheelchair seating in 4 patients and pain in 2 patients. Conclusion Concentric stable reduction of the dislocated femoral head is quite possible with an agressive surgical technique. An easy reposition of the femoral head without any abnormal tension is possible through a generous shortening of the femur, usually without need of an extra bone procedure in the acetabulum. As these patients are always bone immature is possible to extend this surgical procedure into the adolescents

Objectives. There are several reports clarifying successful results following open reduction using Ludloff’s medial approach for congenital (CDH) or developmental dislocation of the hip (DDH). This study aimed to reveal the long-term post-operative course until the period of hip-joint maturity after the conventional surgical treatments. Methods. A long-term follow-up beyond the age of hip-joint maturity was performed for 115 hips in 103 patients who underwent open reduction using Ludloff’s medial approach in our hospital. The mean age at surgery was 8.5 months (2 to 26) and the mean follow-up was 20.3 years (15 to 28). The radiological condition at full growth of the hip joint was evaluated by Severin’s classification. Results. All 115 hips successfully attained reduction after surgery; however, 74 hips (64.3%) required corrective surgery at a mean age of 2.6 years (one to six). According to Severin’s classification, 69 hips (60.0%) were classified as group I or II, which were considered to represent acceptable results. A total of 39 hips (33.9%) were group III and the remaining seven hips (6.1%) group IV. As to re-operation, 20 of 21 patients who underwent surgical reduction after 12 months of age required additional corrective surgeries during the growth period as the hip joint tended to subluxate gradually. Conclusion. Open reduction using Ludloff’s medial approach accomplished successful joint reduction for persistent CDH or DDH, but this surgical treatment was only appropriate before the ambulating stage. Cite this article: Bone Joint Res 2014;3:1–6

Open reduction for developmental dislocation of the hip (DDH) is invasive and sometimes results in femoral head deformity while open reduction has been the first choice in case non-operative reduction is failed in. We treated 3 patients with 3 affected hips using minimum invasive arthroscopic reduction method. Pre-operative MRIs represented these 3 hips had obstruction of interposed thick limbus. The average age of patients treated by this method was 23 months. This method consists of arthrogram, arthroscopic limboplasty, and arthroscopic reduction. This series of maneuvers was able to lead unreducable hips to the reduction position. Post-operative MRIs represented that the interposed thick limbus had been removed to the outside of acetabulum and the limbus covered the reduced femoral head. There were no signs of residual subluxation of the hips in radiographic examination. This new minimum invasive arthroscopic reduction method have a possibility to take the place of the invasive open reduction in the treatment of DDHs with obstruction of interposed thick limbus

The authors reviewed a group of 24 patients (26 hips) who had been managed with open reduction through an anterolateral approach from 1981 to 1985. Eight patients with an inadequate clinical (6) or roentgenographic (2) follow-up were excluded from the study. The purpose was to evaluate 18-year results of nine hips operated in pre-walking age up to 12 months and nine hips operated later. All patients were operated by the senior doctor. The goals of management are concentric reduction and its maintenance in order to provide the optimum environment for development of the hip joint. The average age of the children at the time of operation was seven months (range 3–10 months) in the first group and 32 months (range 15–60 months) in the second group. Open reduction was performed if a stable reduction could not be achieved with traction as demonstrated with arthrography. Evaluation of the first group: marginal dislocation was found in one hip (11.1%) and in the rest of cases the head was highly dislocated. A simultaneous derotational femoral osteotomy was added in the course of four reductions (44.4%) and in three of these cases a subsequent Salter osteotomy was performed. Five hips (55.6%) were reduced without additional femoral osteotomy and in three of these cases, a subsequent combination of Salter and derotational varisation osteotomy was performed. Average age at the time of the subsequent operation was 31 months (range 19–44 months). In the second group, only high dislocations were found and each procedure was accompanied with simultaneous and subsequent interventions. At the final follow-up of the first group, the clinical findings were evaluated as Severin class A in eight hips (88.9%) and class B in one hip (11.1%). Three hips (33.3%) were Severin roentgenographic class I, and six hips (66.7%) were class II. Six hips (66.7%) showed avascular necrosis classified as Ogden-Bucholz Type I (3) and Type II (3). No significant degenerative changes were found. In the second group, the results were worse – two patients had already had THAs implanted. The results are excellent or good in children operated in the pre-walking age. The results in patients operated later are worse. We consider this method to be useful for the treatment of congenital dislocation of the hip

Femoroacetabular impingement (FAI) is a pathologic condition of the hip joint that leads to hip pain and osteoarthrosis (OA), especially in the young and active patient population. It is characterized by an early pathologic contact during hip motion between osseous malformation of the femoral neck and acetabular rim. The goal of the surgical dislocation of the hip is to prevent the development of OA by correcting these malformations. We investigated the clinical and radiographic outcome, the survivorship, and factors predicting poor outcome at 5-year followup. We retrospectively evaluated 101 hips in 78 patients that underwent surgical hip dislocation at a mean age of 32 ± 8.4 (range, 15 – 52) years. The mean followup was 5.7 ± 1.0 (0.9 – 7.1) years. The series included pincer type impingement in 5 hips (5%), cam type in 9 hips (9%), and mixed type of FAI in 87 hips (87%). Pre-operatively, the patients presented with a mean Merle d’Aubigné score of 14.3 ± 3.3 (8 – 17) and a mean osteoarthrosis score according to Tönnis of 0.13 ± 0.34 (0 – 1). At followup, the clinical results were graded using the Merle d’Aubigné score and the radiographic results using the Tönnis score. Failure was defined as a conversion to a total hip arthroplasty (THA), a Merle d’Aubigné score of less than 15 or a progression of osteoarthrosis with a Tönnis score ≥2 at last followup. Demographic, clinical, radiographic, and surgical factors were tested for predictive factors for poor outcome using the Cox regression. At followup the mean Merle d’Aubigné score was 17.2 ± 1.2 (12 – 18) and the mean Tönnis score was 0.19 ± 0.47 (0 – 2). Failures (13 hips, 13%) included 6 hips (6%) with a progression of osteoarthrosis, 5 hips (5%) hips that converted to a THA, and 2 (2%) hips presenting with a Merle d’Aubigné score of less than 15. This resulted in a cumulative survivor ship at 5 years of 97.0 ± 3.3 % (95%-confidence interval, 93.6 – 100%). Factors predicting poor outcome were a preoperative Tönnis score of 1, a cartilage tear in the Arthro-MRI, and increased age or BMI at operation. Surgical hip dislocation has the potential to prevent the progression of osteoarthrosis and to decrease hip pain in patients with FAI. The optimal patient is young, with a decreased BMI and no sign of degeneration in the conventional radiograph or Arthro-MRI

Total hip arthroplasty (THA) in neglected congenital dislocation of the hip (CDH) constitutes a challenging procedure, with surgical difficulties and complications. The purpose of this study was to analyse the complications of THAs in CDH. Between June 1983 and September 2002, 418 THAs were performed in 356 patients with CDH, with a mean follow-up 108 (7–237) months. The mean age at surgery was 53.3 (24–79) years with 325 females and 31 males. 83 patients had CDH in high position. 307 arthroplasties were cementless, 39 cemented and 72 hybrids. 40 stems were custom made. The cup always was positioned at the true acetabulum. 24 shortening osteotomies of the femur, 8 corrective supracondylar and 6 trochanteric osteotomies were performed. Preoperatively the average Merle d’Aubigne-Postel hip score was 1.1 for pain, 4.8 for range of motion and 3.1 for walking ability. Postoperatively the average hip score was 5.2, 4.7 and 5.3 respectively. The average length discrepancy was 8 cm (3–12) preoperatively and 1.5 cm remained in 8 patients. Complications included 7 intraoperative fractures of the femur, 12 dislocations, 4 peroneal nerve palsies that recovered, 25 heterotopic ossifications, 7 deep vein thromboses, 3 pulmonary embolisms, early mechanical loosening in 4 cemented and 10 cementless cups and 3 infections. Complications were diminished dramatically last years due to improved surgical technique, new available implants and preoperative evaluation of the hip with CT and CAD-CAM-CAE study that allowed better surgical planning with trial stem implantation from a series of stem designs and custom made femoral components manufacturing

The effects of NF-I on the hip have been underreported in literature. The bony changes in the hip can be mild to severe and are often present, but not diagnosed. Dislocation of the hip has been described but protrusio acetabulum is underdiagnosed and has only been reported from one institute. This is the first case where an open biopsy has been taken from the hip joint by surgical dislocation with preservation of the blood supply to the femoral head. Gross and microscopic pathology in the neurofibromatosis of the hip has been described for the first time in our report. A 16-year-old girl presented with history of pain, limp and stiffness in the right hip for several years. Radiographs, CT scan showed severe protrusio acetabulum. Histological analysis from the tissue taken from the hip was a neurofibroma. There was very minimal hyaline cartilage in the acetabulum at operation. Therefore the floor of the acetabulum was grafted with the autologous cancellous bone chips obtained from her greater trochanter. The aim of this was to lateralize the hip center to a normal position. At six months follow up she was doing well. Her range of movements had increased by 20%

Introduction: 1986 we started with ultrasound screening for congenital dislocation of the hip (CDH) in all newborn children from our hospital. In 1995 an regime was investigated we developed out of our expieriences of the previous years and started a prospective study. Material and methods: In the period 1995 to 2006 we did ultrasound screening in newborn babies within the first week of life. There were 14744 ultrasound checkups in 7372 children. Following the classification of Graf we had 7213 children with stage Ia,Ib or IIa. In 159 children (2,15%) we saw a ultrasound measurement stage IIc or worse (D,IIIa/b; IV a/b) which was an indication for treatment with the Pavlik bandage. Over all we treated 203 dysplastic hips with our regime. By dedecting a congenital dislocated hip we applyed the Pavlik harness immediately after diagnosis in 110 degrees of flection an 45 degrees of abduction. The fist controll reviewing the compliance of the parents and the setting of the bandage was 10 to 14 days after starting treatment. Every 10 to 14 days we did bandage checks combined with ultrasound controlls. We stopped treatment with the pavlik harness when the ultrasound showed a mature, well developed picture of both hips compared to Graf stage Ia/b. Results: We treated 159 newborn with 203 dislocated hips. There were 131 (82.4%) female an 28 (17.6)% male patients. 100 right (49.5%) and in 103 left (50.5%) hips. The distribution following Graf classification were 150 for typ IIc (73.9%), 18 for type D (8.9%), 31 for type IIIa/b (15.3%) and 4 type IVa/b (1.9%). Summerizing there were 150 hips, stage IIc (73,9%), to be at risk to develope an luxation, but 53 (26,1%) hips were already luxated at the moment of birth. The average treatment time over all was 53 days (7,6 (3–26) weeks). Subdividing the groups the treatment period for stage IIc was in mean 7.6 weeks, for stage D 7.1 weeks, for stage III a/b 9.5 weeks and for stage IV a/b 9 week. We had a lost to follow up in 4 (1,81%) patients (3 times compliance problems with the parents at stage II a in both sides). Once we had to treat with a so called Fettweiss-cast after one week of therapy because the baby was to small for the bandage but in the other cases there was no need für additional methodes of treatment. At no time we ever had a degradation of the disease. Furthermore we had no necrosis of the femoral head in our study population. Conclusion: The treatment with the Pavlik bandage of the CDH in every stage in newborn was possible and showed good result in 203 hips. To establish a standardised therapy you have to do an area-wide ultrasound screening as well as an consistently follow up of your therapy

Background. Hip Hemiarthroplasty is one of the commonest orthopaedic operation done in UK with recent NHFD data from 2017 report showing that 43% of the 77000 patients who presented to hospital had hemiarthroplasty. Literature suggests dislocation rate of 0.8% – 6.1% for Hip Hemiarthroplasty. Dislocation of hemiarthroplasty may lead to significant morbidity and mortality. Aim. To investigate if acetabular dysplasia has a significant association with hemiarthroplasty dislocation. Methodology. Retrospective multicentre review. Review of radiographs of patients receiving a hip hemiarthroplasty for a hip fracture measuring Acetabular index (sharp angle) and Lateral Centre edge angle(CEA). A large acetabular index and lower value for the center-edge angle suggest acetabular dysplasia. Measurements were made for 20 patients with dislocation and 20 patients without dislocation. Statistical assessment of the results with unpaired t test was performed. Results. Mean acetabular angle for those with dislocation was 42.65 degrees versus 37.8 for those without dislocation giving a p value of 0.000861. Mean Center-edge angle of those with dislocation was 26.1 degrees versus 37 for those without dislocation giving a p value of 0.000019. Conclusion. This study showed that the hemiarthroplasty dislocation group had higher acetabular index and Lower Center-edge angle compared to the hemiarthroplasty group without dislocation clearly demonstrating that acetabular dysplasia is implicated in the aetiology of hip hemiarthroplasty dislocation. Hence careful review of the pre-op X-rays for dysplastic features would benefit in making a sound management plan

Congenital Dislocation of the Hip (CDH) has been routinely screened for at birth using clinical tests since the early 60’s. In Edinburgh Macnicol (. 1. ) assessed the screening programme between 1962 to 1986. It particularly focussed on the change in incidence of late diagnosis when screening was undertaken by experienced staff in comparison to junior staff. The treatment of Orthopaedic conditions in children within the Edinburgh area was combined at the Royal Hospital for Sick Children in 1995. Therefore this paper aims to reassess the screening programme for CDH between 1995–1999 and compare it with the previously achieved results in the same population. From 1 Jan 1995 to 31 Dec 1999 there were 34,597 live births at Edinburgh’s Maternity hospitals. An orthopaedic clinical assistant examined all infants within the first 24 hours with considerable experience in this field. In addition to the Ortolani and Barlow tests, skeletal and skin fold asymmetry, limitation of abduction and loss of the physiological flexion deformity present in the normal neonate were observed. FH, delivery and circumstances of the pregnancy were noted. Hips found to be clinically unstable were referred on to the CDH clinic where further assessment and ultrasound were performed in order to decide upon the further management of each child. In 1995 there were 7179 live births, 2.93 of which were harnessed (incidence per 1000 births), 1.11 late diagnosis, (incidence per 1000 births) and 1.39 were operated upon (incidence per 1000 births). In 1996 there were 7144 live births, 3.64 of which were harnessed (incidence per 1000 births), 1.40 late diagnosis, (incidence per 1000 births) and 1.82 were operated upon (incidence per 1000 births). In 1997 there were 7065 live births, 2.12 of which were harnessed (incidence per 1000 births), 0.57 late diagnosis, (incidence per 1000 births) and 0.71 were operated upon (incidence per 1000 births). In 1998 there were 6763 live births, 4.14 of which were harnessed (incidence per 1000 births), 0.59 late diagnosis, (incidence per 1000 births) and 0.30 were operated upon (incidence per 1000 births). In 1999 there were 6446 live births, 6.12 of which were harnessed (incidence per 1000 births), 0.78 late diagnosis, (incidence per 1000 births) and 0.62 were operated upon (incidence per 1000 births). Overall there were 34597 live births, 3.76 of which were harnessed (incidence pre 1000 births), 0.89 late diagnosis, (incidence per 1000 births) and 0.98 were operated upon (incidence per 1000 births). The incidence of late diagnosis of CDH in Midlothian has increased from 0.5 per 1000 as reported by Macnicol between 1962–1986 to 0.89 per 1000 over the last 5 years. These results are clearly disappointing. Although Catford et al (. 2. ) has proposed that the incidence of CDH has been increasing this does not explain the size of the increase in late diagnosis seen. Further investigation is required in order to reduce this late presentation rate to that previously achieved

Background: Deformity of the femoral head after open reduction for developmental dislocation of the hip (DDH) influences the outcome of pelvic osteotomy as a final correction for residual dysplasia to prevent secondary osteoarthritis. The purpose of this study was to review long-term outcomes after open reduction using a medial approach for DDH. The correlation between age at the time of operation and femoral head deformity at skeletal maturity was specifically evaluated. Methods: Forty-two hips in 40 patients with more than 10 years of follow-up were assessed radiologically. The mean age at the time of surgery was 14.3 (range, 6–31) months, and the postoperative follow-up period ranged from 10 to 27 (mean, 15.8) years. The round and enlargement indices of the femoral head were measured on follow-up radiographs to evaluate deformity and enlargement of the femoral head at skeletal maturity. Results: Severin classification was I and II in 16 hips; III, IV, and V in 23; and II at the final follow-up in the 3 hips treated by osteotomy less than 10 years after open reduction. Mean round index at follow-up was 58.3 ± 8.3 (range, 47–79); it showed correlation with age at the time of operation (r = 0.68, p < 0.001). Mean enlargement index at follow-up was 113.4 ± 11.8 (range, 93–137) and showed no correlation with age at the time of operation (r = 0.009, p = 0.96). Conclusions: At more than 10 years’ follow-up, the occurrence of deformity of the femoral head correlated with increased age at the time of operation. Indications for use of a medial approach in the correction of DDH in older patients must take into account the risk of subsequent femoral head deformity at skeletal maturity

We report our early Boston experience with the technique of Ganz, et al., for surgical dislocation of the hip, which provides a safe, powerful approach to certain major intraarticular hip problems. Materials and Methods: Forty-seven hips with various mechanical disorders have been treated using the Ganz technique of trochanteric flip osteotomy and anterior dislocation (JBJS 83-B: 1119-1124, 2001). Diagnoses include slipped epiphysis 14, Perthes 12, aspherical head/ anterior offset 12, dysplasia 14, multiple exostoses 2, other 3.Seven patients had simultaneous femoral oste-otomies; four had subcapital osteotomies for epiphys-iolysis. All patients had pain and limitation of motion preoperatively, and more than fifty percent had severe deformity and/or some arthrosis. Follow-up was six months to five years. Ages at surgery were eight to forty-eight years (mean twenty years). Results: The variety of pathologies render objective analysis difficult, though all patients reported greatly reduced pain and increased motion post operatively. Only five patients were totally pain free and had objectively totally normal hips. No patient felt unimproved. No patient had radiographic signs of osteonecrosis. Conclusion: Paralleling the Bernese experience of more than eight hundred cases, we find the Bernese technique of surgical dislocation to be a safe, effective tool for treating intra-articular hip pathology, increasing treatment possibilities for hip joint preservation. We anticipate greatly expanding its use in the future

Introduction and Objective. Dislocation of a hip hemiarthroplasty is a significant complication with a high mortality rate in elderly patients. Previous studies have shown a higher risk of dislocation in patients with neuromuscular conditions. In this study, we reviewed our larger cohort of patients to identify if there is a link between neuromuscular disorders and dislocation of hip hemiarthroplasty in patients with neuromuscular conditions. Materials and Methods. We have retrospectively analysed a single-centre data that was collected over 34 years for patients with intracapsular neck of femur fracture who underwent hip hemiarthroplasty. The study population was composed of four groups: patients with no neuromuscular disorders, patients with Parkinson's disease, patients with previous stroke, and patients with mental impairment. Results. A total of 3827 patients were included in the analysis. 3371 patients had no neuromuscular condition (Group I) with a dislocation rate of 1.1%. 219 patients had Parkinsonism (Group II) with a dislocation rate of 3.2%, 104 patients had a previous stroke with weakness on the fracture side with a dislocation rate of 1.0% (Group III), and 984 patients had severe mental impairment with a dislocation rate of 1.8% (Group IV). The increased dislocation rate for those with Parkinson's disease was statistically significant (p=0.02) while none of the other neuromuscular conditions were statistically significant. Conclusions. Our study has shown an increased risk of dislocation of hemiarthroplasty in patients with Parkinson's disease in comparison to other groups. No increase was apparent for patients with mental impairment or weakness from a previous stroke