Purpose. To compare the clinical and radiological results between internal fixation using the proximal femoral nail system and bipolar hemiarthroplasty in reverse oblique intertrochanteric hip fracture in elderly patients. Materials and Methods. From January 2005 to July 2012, we reviewed 53 patients who had been treated surgically for reverse oblique intertrochanteric fracture and been followed up on for a minimum of 2 years. The patients, all over 70 years old, were divided into two groups for retrospective evaluation: one group was treated with open reduction and internal fixation using the proximal femoral nail system (31 cases), and the other group was treated with bipolar hemiarthroplasty (22 cases). Results. Early ambulation postoperatively and less pain at postoperative three months were significantly superior in the bipolar hemiarthroplasty group. However, by 24 months postoperatively, the open reduction and internal fixation group had higher Harris scores and correspondingly less pain than the bipolar hemiarthroplasty group. There were no significant differences in union rate, duration of hospitalization or lateral wall fracture healing between the two groups. Four patients in the open reduction and internal fixation group underwent reoperation. Conclusions. In the treatment of intertrochanteric fracture of the reverse oblique type, if the patient's health and bone quality are good, open reduction and internal fixation is considered to be the better choice. However, in cases of severe communition of fracture and poor bone quality along with high risk of early reduction failure, bipolar hemiarthroplasty is an alternative offering advantages in terms of early ambulation, less pain at early stages, and lower risk of reoperation

Literature suggests in senile IT fracture group with osteoporosis and comminution, the rates of complications are very high. Documented figures show 16% deaths in non-operative treatment and 16% (late) non-union IT fractures in non operative treatment. The post fixation re-operation rate is 23% after two to three years. High rate implant cutout, penetration and plate cutout leads to increased morbidity and mortality again. The aim of this study is to find out the results of primary prosthetic replacement in comminuted, osteoporotic intertrochanteric fractures in elderly patients. Eight patients of the age group from 68 to 94 years (average 78.4) with four part fractures were operated primarily with bipolar hemiarthroplasty. They were operated by posterolateral approach and the hip joint was exposed through the fracture site itself. After pan release the proximal fragment was delivered and a modular locally manufactured cemented bipolar hemiarthroplasty was performed. Due care was taken to restore offset, limb length and soft tissue balancing. The patients were mobile early after two days with walker and they became independent within four weeks after operation. They were followed up from six months to 3.5 years (average 2.1 years). The functional and radiological evaluation was done. There were five females and three males. The modified Charnley score improved from average 2.3 pre-operatively to an average of 5.2 with respect to pain, mobility and function. All the patients were happy and independent. One patient developed abductor lurch, but managed to carry out independently all her activities of daily living. One patient had a dislocation. This lady was very unco-operative and never helped in the rehabilitation programme. She lost to follow-up. Radiologically, there were no signs of loosening, progressive adiolucent lines, subsidence or osteolysis at the latest follow-up. Primary prosthetic hemi-replacement in cases of osteoporotic four part fractures in elderly patients helps early restoration of function and thereby prevents complications

Purpose. We compared visible blood loss and calculated blood loss after bipolar hemiarthroplasty in femoral neck fracture, and evaluated correlation between blood loss and its risk factors. Materials and Methods: A total of 356 patients who underwent bipolar hemiarthroplasty in femoral neck fracture between 2004 and 2010 were enrolled in this study. The total blood loss was calculated using the formula reported by Mercuiali and Brecher. We analyzed several factors, including gender, age, body mass index (BMI), anesthesia method, cardiovascular and cerebrovascular disease, preoperative anemia, American Society of Anesthesiologists (ASA) score, use of cement, and use of antithrombotic agents. Results: Total calculated blood loss (1,408±72 ml) differed significantly from visible blood loss(980±102 ml). In addition, calculated blood loss differed between risk factors (1,526±369 ml in cardiovascular disease, 1,588±279 ml in general anesthesia, 1,645±920 ml in obesity, and 1,605±439 ml in use of antithrombotic agents). Conclusion: Total calculated blood loss was much greater than visible blood loss. Patients with risk factors such as cardiovascular disease, obesity, use of antithrombotic agents, and general anesthesia should be treated with care in order to reduce blood loss

Background. BHA is popular surgery for femoral neck fractures expecially elderly patients. However, clinical results are variable that factors affecting results are questionable. Therefore we investigated radiologic fators, dysplastic hip whether influences results of BHA. Methods. Between 2004 and 2009, 200 patients undergoing bipolar hemiarthroplasty for femoral neck fracture were divided two groups; a lateral center edge (LCE) angle of < 16 degree or > 16 degree on anteroposterior radiographs. All surgical procedures were performed by a single surgeon. Dermogrpahic data, the harris hip score, WOMAC index, Koval activity level, and complication were recorded. The minimum follow up interval was 4 years (mean, 7.8 years). Result. Late postoperative complications such as periprosthetic joint infection, acetabular erosion, and subluxation of bioplar head were commonly observed in a group <16 degree of center edge angle. Clinical score was significantly lower in dysplastic group. Revision rate was higher in dysplastic group compared with group LCE angle of above the 16 degree. Conclusion. These results suggest that the dysplastic nature might be affected result of bipolar hemiarthroplasty in femroal neck fracture especially elderly patients

Introduction. In the case of bipolar hemiarthroplasty, surgeons are often faced with only migration of outer head and severe osteolysis in acetabulum without loosening of femoral component. There has been much debate regarding the merits of removing or retaining stable femoral components in such cases. The purpose of this study was to determine whether revision of an isolated acetabular component without the removal of a well-fixed femoral component [Fig. 1] could be successfully performed. Materials and methods. Thirty-four hips of 33 patients who were followed up for a minimum of 1 year were examined. There were 29 women and 4 men. The average time from primary operation to revision surgery was 12.5 years (range, 0.0 to 17.9 years), and the average follow-up time after revision was 5 years (range, 1.1 to 15.2 years). The average age of the patients at the time of the index revision was sixty-four years (range, thirty-two to seventy-eight years). The reason for acetabular revision was migration of outer head in twenty-eight hips, disassembly of bipolar cup in four hips and recurrent dislocation in two hips. Of the thirty-four femoral components, twenty-seven were cementless and seven were cemented. In nine hips, we performed bone grafting to osteolysis of the proximal femur around the stem. Acetabular components were revised to an acetabular reinforcement ring with a cemented cup in 26 hips, to cementless acetabular components in 8 hips, and to cemented cup in 1 hip. Results. The average Japan Orthopaedic Association hip score improved from 50.7 to 86.1 points after revision surgery. One femoral component (3%) was revised because of periprosthetic fracture, three years after the index acetabular revision and eighteen years after the initial bipolar hemiarthroplasty. Radiographic evaluation of the thirty-three femoral components that were not revised demonstrated no evidence of loosening or subsidence. There were no dislocation or deep infection. Thirty-three (97%) of the acetabular components were judged to be stable at the final follow-up. A nonprogressive radiolucent line of less than 2 mm was observed in one case. Conclusion. We recommend that isolated acetabular revision be considered in cases of failed bipolar hemiarthroplasty with a well-fixed femoral component

Purpose. To perform comparative analysis between the results of internal fixation using proximal femoral nail system and bipolar hemiarthroplasty in pantrochanteric hip fracture in elderly patients. Materials and Methods. From January 2006 to February 2012, we reviewed 43 patients, who were treated surgically for pantrochanterichip fractures, with a minimum of 2 years follow up. The patient's age was older than 70 year old. The patients were divided into three groups and evaluated, retrospectively. The fracture reduction were regarded as satisfactory in S-OR-IF group(17 cases) and unsatisfactory in US-OR-IF group(9 cases) and the other group was treated with bipolar hemiarthroplasty (BHA group, 17 cases.). Results. At 24 months post-operation, S-OR-IF group had higher Harris scores, less pain, and better walking ability than S-OR-IF and BHA group. Six patients in the internal fixation group (one with S-OR-IF and five with US-OR-IF) had got reoperation. Conclusion. For pantrochanteric fractures of old-aged patient over 70 years old, bipolar hemiarthroplasty has few of severe complications which needs reoperation, and has good results of early ambulation. However, satisfactory reduction and internal fixation makes better clinical results in long term follow-up

Purpose. We evaluated the clinical and radiographic outcomes of cementless bipolar hemiarthroplasty using rectangular cross-section stem for femoral neck fracture in elderly patients more than 80 years of age with osteoporosis. Material and Methods. 76(cemented 46, cementless 30) bipolar hemiarthroplasties for femur neck fracture were performed in elderly patients more than 80 years old. The mean follow-up period was 4.3 years (2 to 7 years). The Harris hip score at last follow-up and pre-postoperative daily living activity scale according to Kitamura methods were analyzed clinically. The radiological results were assessed using stability of femoral stem and other complications were evaluated. Results: At last follow-up, there were no significant differences of Harris hip score and daily living activity between two groups. Stem loosening and instability were not observed in cementless arthroplasty. There were 18 cases of osseous fixation in radiologic study. There were 1 case of dislocation and 1 case of superficial infection in cemented arthroplasty and 1 case of deep infection in cementless arthroplasty. Conclusion. Cementless bipolar hemiarthroplasty using rectangular cross-section stem for elderly patients with a femoral neck fracture showed satisfactory short-term clinical and radiological results compared to using cement stem

Purpose. According to Bipolar Hemiarthroplasty of the Hip (BHA), several reports indicated earlier acquisition of walking ability in direct anterior approach (DAA) than posterior approach (PA), but there is still few randomized studies comparing accuracy of stem insertion in DAA and PA. Therefore, we performed a prospective study, focusing positioning of implant. Patient and Methods. We chose 29 patients for this study, diagnosed as femoral neck fracture (Garden grade III or IV) from April 2012 to April 2013, excluding obesity patients (body mass index upper than 30kg/m. 2. ), muscular patients, osteoporotic patients (Sigh grade I or II), and tumor bearing patients. Patients were enrolled in a prospective, non-blinded study and were randomly assigned by envelope method to receive either DAA or PA. Taperloc BHA system (Zimmer) was adapted for all cases. Patient condition, operation condition and radiographic findings were investigated. On CT imaging, Canal fill was calculated Stem fill was studied at lower point of lesser trochanter that was considered to be load center. Static analysis was carried out using SPSS ver21 (IBM. c. ). Continuous variables between the two groups were compared using a no matched bilateral Student's t-test. For nominal variables we used χ. 2. test. P value <0.05 was considered to be significant. (Table1). Result. There was no significant difference in the head size (DAA43.7/PA45.1mm, p=0.628), stem size (DAA10.6/PA10.8, p=0.739) and total blood loss (DAA198.3/PA146.7ml, p=0.41). Duration of operation was significantly longer in the DAA group at 85.61 min in comparison with 61.75 min in the PA group (p<0.001). One fracture of the greater trochanter during surgery was occurred in DAA group. This case needed cable fixation around greater trochanter. No symptomatic pulmonary embolism occurred, but deep vein thrombosis was detected in three patients in DAA group and in two patients in PA group. Canal fill calculated by CT imaging was no significant difference between both groups (DAA67%/PA71%, p=0.12). All patients were discharged to a rehabilitation facility. Modified Harris Hip score at the discharge assessed early clinical result. There was no significant difference between both groups (DAA45.7/PA49.1, p=0.713). To evaluate the learning effect of the operative outcome, we divide both groups into halves. We defined the first half of subgroups as early phase and the last half of subgroups as late phase. In the DAA group, significant improvement was observed in canal fill and there was a tendency of total blood loss to be lesser (Table 2). In the PA group, on the other hand, no improvement was observed for any values (Table 3). Discussion and conclusion. We performed a prospective randomized study. The strengths of this study include the standardized protocol about stem component and surgical team. There were significant difference with duration operation in this study. This facilitates accurate radiographic assessment so that we could analyze more reliable data. This study is a preliminary study and probably sample size may be inadequate. We can also ignore the effect of learning curve especially in the DAA group

Worldwide, it is expected that 6.3 million patients will sustain a hip fracture in 2050. Hemiarthroplasty is commonly practiced for displaced femoral neck fractures. The choice between unipolar (UH) or bipolar (BH) hemiarthroplasty is still controversial. The objective of this study was to assess the effect on hip function of BH compared to UH for a displaced femoral neck fracture in elderly patients. We conducted a systematic review and meta-analysis of randomized controlled trials comparing BH to UH. Data sources were Medline, Embase, Cochrane Library and Web of Science. All data was pooled in Review Manager (RevMan) version 5.3 software. Selection of the studies included, data abstraction, data synthesis, risk of biais and quality of evidence evaluation was done independently by two authors. Our primary outcome was postoperative hip function. Secondary outcomes were health-related quality of life (HRQoL), acetabular erosion and postoperative complications. 13 randomized controlled trials (n=2256) were eligible for the meta-analysis. There was no difference in hip function scores (standardized mean difference of 0.33 [−0.09–0.75, n=864, I. 2. = 87%,]). Patients with bipolar heads had higher Health-Related Quality of Life scores than patients with unipolar heads (mean difference in EQ-5D scores of 0.12 [0.04–0.19, n=550, I. 2. = 44%]). The use of BH decreased the incidence of acetabular erosion (relative risk of 0.37 [0.17–0.83, n=525, I. 2. = 0%]). There was no relative risk difference for mortality, dislocation, revision and infection. Due to the high heterogeneity between the studies included, it is still unclear whether patients undergoing BH have better hip function than patients undergoing UH. Although, health-related quality of life (HRQoL) may be improved. Future research could be conducted to determine whether a BH offers a better quality of life than UH to geriatric patients undergoing surgery. More precise assessment scores could be developed to better evaluate postoperative outcomes

Introduction

Total hip arthroplasty (THA) is the most common surgery performed for complications of bipolar arthroplasty. The present study evaluated the functional results and complications associated with this surgery.

The objective of this study is to compare three dimensional (3D) postoperative motion between metal and ceramic bipolar hip hemiarthroplasty for femoral neck fracture. Materials and Methods. This study was conducted with forty cases (20 cases of metal bipolar hemiarthroplasty (4 males, 16 females), 20 cases of ceramic bipolar hemiarthroplasty (2 males, 18 females)) from November 2012 to November 2014. Average age was 80.8±7.5 years for the metal bipolar group and 79.3±10.5 years for the ceramic bipolar group. We obtained motion pictures from standing position to maximum abduction in flexion by fluoroscopy then analyzed by 2D–3D image matching method. The motion range of the “Shell angle”, “Stem neck angle” and the “Stem neck and shell angle” has been compared between the metal bipolar group and the ceramic bipolar group (Fig. 1). Results. Metal bipolar showed greater variability of the Stem neck angle and Shell angle than ceramic bipolar. Six of the twenty cases reached unilateral oscillation angle of 37 degrees in metal bipolar. In other words, 30% of metal bipolar group revealed neck-shell impingement. No case reached oscillation angle of 58 degrees in ceramic bipolar group. There was no significant difference between the metal bipolar group and the ceramic bipolar group with respect to the difference of minimum and maximum angle of Stem neck angle (movement range of the stem neck) and Shell angle (movement range of the bipolar cup). On the other hand, difference of minimum and maximum angle of the Stem neck and shell angle (movement range of the inner head) was significantly greater in the metal bipolar group than the ceramic bipolar group. Movement, range of bipolar shell was significantly greater than that of inner head in both groups (Table 1). Discussion. The present study is the first report using 2D–3D image matching method in bipolar impingement. From the result of our study, bipolar shell moves greatly against the acetabular cartilage for both metal bipolar and ceramic bipolar, and the range of movement of the outer shell was significantly greater than the range of movement of the inner head. It indicates that most of the movement actually occurs between outer shell and acetabular cartilage, despite bipolar prosthesis having a double bearing function intrinsic to the design. Impingement between the shell and the stem neck was found six of twenty cases with metal bipolar group and no impingement occurred with ceramic bipolar group. The present results showed that the ceramic bipolar has the possibility to avoid the characteristic complications of the bipolar caused by the wear debris produced by impingement. In conclusion, the metal bipolar group's inner head's range of movement was greater than the ceramic bipolar group. The impingement between stem neck and shell occurred in the 30% of metal group patients. On the other hand, there were no impingement cases for the ceramic bipolar group. We expect good long term clinical result and expansion of the indication as the ceramic bipolar may reduce the typical bipolar related complication

Introduction

In comminuted intertrochanteric fractures, various operative options have been introduced. The purpose of this study was to determine whether there were differences in clinical and radiologic outcomes among bipolar hemiarthroplasty(BH), compression hip screw(CHS) and proximal femur nail antirotatory(PFNA) in treating comminuted intertrochanteric fractures(AO type, A2(21, 22, 23))

Recent NICE guidelines have suggested abandoning the Thompson hemiarthroplasty (TH) in favour of a ‘proven prosthesis’ such as the Exeter Trauma Stem (ETS). This is controversial because of significant cost implications and limited research assessing outcomes of the ETS. The aim of this study was to assess the treatment of intracapsular neck of femur fractures with the TH. Between 2002 and 2006 (minimum 5 year follow-up), 431 cemented TH's were performed. Death rate at 1 year and 5 years were 26.0% and 67.7% respectively. Dislocation (1.4%) and infection (0.2%) rates were low and revision rate was 1.2%. Comparison was made to Bipolar hemiarthroplasties over the same period (total 194). These had lower rates of dislocation (0.5%) and infection (0.5%) with a significantly higher (3.6%) revision rate. We feel that the TH remains the current gold standard treatment for intracapsular fractures, in appropriate patients, due to low complication and revision rates. Modern implants may provide better function or longevity, but there is no evidence in the literature to support abandoning the TH. Surgeons should assess patients and decide on its use, despite NICE guidelines, as it remains a cost effective treatment method, particularly for older, less mobile and cognitively impaired patients

Undisplaced or minimal displaced medial neck femoral fractures are treated with canulated screws either in young or in elderly patients with good functional capacity, without severe comorbidity and cognitive impairment. We also perform this procedure in patients with very low daily activities and affected by severe comorbidity, with the aim to reduce pain. We reserve total hip replacement in middle-advanced age, with good level of functional activity and adequate bone-stock. We use bipolar hemiarthroplasty in patients that need early mobilization for the presence of comorbidities that could worsen. We prefer cemented bipolar hemiarthroplasty, as it gives an optimal primary stability, without press-fit. We prefer to utilize bipolar hemiarthroplasty with memory shape stem F.G.L. (Fig.1) in high risk patients (ASA classification). In fact the use of cement prolongs duration of surgery and is associated with higher perioperative mortality from cardiopulmonary complications. This stem in its metaphyseal region has 10 tabs, made of a Nitinol alloy (Ni-Ti). The feature of this alloy is to enlarge when brought to a certain temperature. When F.G.L. stem is mantained at 4° - 7° C the Nitinol (r) tabs are in the “restrained” configuration. Just at the time of surgery procedure, the stem is taken out of the refrigerator and inserted into the femoral diaphysis. At corporeal temperature, the Nitinol tabs enlarge, compressing the metaphyseal cancellous femoral region and give an immediate primary stability. We report clinical and radiological results of 15 patients (mean follow-up: 8 months) that underwent surgical procedure of bipolar hemiarthroplasty with F.G.L. stem in our department from March 2008 to December 2009. We had no perioperative complications and the results overlapped those of patients that underwent standard cemented bipolar hemiarthroplasty. The advantage of the use of F.G.L. stem is that it allows an immediate primary stability without searching an extreme press-fit. The disadvantage is the higher cost respect a standard cemented bipolar hemiarthroplasty. Therefore its use should be limited to those patients in which the surgery time must be contained for severe comorbidity, or in patients in which specific cardio-pulmonary complaints make dangerous the use of cement

Purpose. To observe the follow-up results of standard cemented bipolar hemiarthroplasty with double loop and tension band wiring technique for treatment of unstable intertrochanteric hip fractures in elderly patients with osteoporosis. Materials and Methods. From May 2000 to May 2006, 86 cemented bipolar hemiarthroplasties were performed in elderly patients who had unstable intertrochanteric fractures. The mean age at the time of surgery was 82 years old. The average follow-up period were 5.3 years. We evaluated post-operative results after operation by clinical and radiographic methods. Results. Clinically, the final follow-up of Harrsi hip score was noted 79.2. The mean time needed for full weight bearing following surgery was 4.2 weeks and 82.5% of patients regained their preoperative ambulatory level. All patients achieved union in lesser trochanter fracuture, but great trochanter displacement were observed in 4 cases. There was one case of acetabular erosion. Post-operative superficial infections were found in 2 cases. 1 case with stem subsidence(<5 mm) showed satisfactory results without further subsidence in follow-ups. Conclusion. If we properly apply indications in technique with cemented bipolar hemiarthroplasty in the treatment of unstable intertrochanteric hip fracture in elderly, we will achieve systematic postoperative rehabilitation, pain control and handy nursing which is its one of merits

Purpose. To evaluate outcome after cementless bipolar hemiarthroplasties using a standard(tapered, rectangular) stem for the treatment of above type A2 fractures in elderly patients. Material and methods. We reviewed the records of 37 patients who underwent bipolar hemiarthroplasty between February 2006 and Feburuary 2010 in our hospital who were followed for more than two years after surgery. The mean patient age was 73.5 years old (range 64∼88 years old). 16 patients were men, and 21 patients were women. We evaluated the results by analyzing operation time, amount of bleeding, recovery of walking ability, complications and radiologic findings. Result. The mean operation time was 75.3 minutes. The average total amount of bleeding was of 755.5 cc. At the last follow-up, 23 patients (62%) had recovered walking ability. Complications included a deep infection in one case, 1 cases of acetabular erosion, 2 cases of greater trochanter non-union. There were no revisions due to prosthesis loosening or another reason. Conclusion. Cementless bipolar hemiarthroplasty using a tapered, rectangular stem can be an alternative treatment for type A2 intertrochanteric fractures in elderly patients so as to achieve earlier mobilisation

INTRODUCTION. THA as primary treatment for displaced femoral neck fractures in elderly still remains a prominent concern. Overall dislocation rate after total hip arthroplasty (THA) is reported form 1∼5%. But, it is quiet different in situation of femur neck fracture in elderly. The THA is associated with higher rates of dislocation (8%∼11%) in eldery compared to hemiarthroplasty even though THA showed better clinical and functional scores. Recently resurgence about THA using DMC comes after improvement of manufacturing technology. The aim of this prospective multicenter study is to assess the rates of dislocation and re-operation for displaced femoral neck fractures in elderly with THA with Dual Mobility Cup (DMC) and to review systematically comparison of previous reports. Up to our knowledge, this is first report from asian conutry about the clinical outcomes THA using DMC for displaced femur neck fracture in elderly. METHODS. Prospective consecutive groups of patients treated for displaced femoral neck fractures by three surgeons at each three center were included. 131 hips underwent THA with DMC for acute displaced femoral neck fracture in patients aged older than 70 years. Data regarding rates of dislocation and re-operation were obtained by review of medical records. Additionally From 2009 which the US FDA first approved the DMC, the authors searched reports regarding to THA using DMC for displaced femur neck fracture in elderly using the MEDLINE including cases series and comparative studies with bipolar hemiarthroplasty and THA. Therefore, current report was compared with previous reports. RESULTS. The reports about THA using DMC for displaced femur neck fracture in elderly were limited. Most of them comes from European countries. Comparative study with THA from Sweden reported the dislocation rate of THA using DMC with average aged 75-year is 0%. In Denmark study, the bipolar hemiarthroplasty showed 14% of dislocation rate for femur neck fracture in patient aged 75 years but, THA using DMC is 4.6%. Two cases series from French reported about 1–4% in patients aged 80 years. In our multicenter study, dislocation occurred in 6/131 hips (4.6%) treated with total hip arthroplasty using DMC for displaced femur neck fracture over 70 years older patients. Reoperations including periprosthetic fracture and fixation failure of cup were required in 1/43 (2.3%) hips treated with total hip arthroplasty using DM cup. These result is comparable to European reports. DISCUSSION AND CONCLUSION. Our findings indicate that THA with DMC can not guarantee to prevent the dislocation for high risk elderly patients, but the overall rate of dislocation can be comparable to those of bipolar hemiarthroplasty and reduced compared to conventional total hip arthroplasty. This result might be a valuable messages for burden of the medical cost by dislocation after arthroplasty especially for older patient. Therefore, adding advnatages of THA compared with hemiarthroplasty, the THA with DMC can be a wise option for displaced femoral neck fracture in eldely. But, the randomized controlled study still is needed to clarify to confirm this findings

[Background]. Bipolar hemiarthroplasty (following BHA) have historically had poor results in patients with idiopathic osteonecrosis of femoral head (OFNH). However, most recent report have shown excellent results with new generation BHA designs that incorporate advances in bearing technology. These optimal outcomes with bipolar hemiarthroplasty will be more attractive procedure for young patients who need bone stock for future total arthroplasty. The purpose of the current study was to evaluate the clinical and radiographic finding of this procedure for the treatment of OFNH at our institution after 7-to 21years follow-up. [Subjects and Methods]. We retrospectively reviewed a consecutive series of 29 patients (40 hips) who underwent primary bipolar hemiarthroplasty for ION (36 hips with stage III and 4 hips with stage IV) with a cementless femoral component between 1992 and 2006. Osteonecrosis was associated with corticosteroid use (23 patients), alcohol (16 patients), idiopathic (one patients). The mean follow-up duration was approximately 12 (range 7 to 21) years. Patients were evaluated according to the Japan Orthopaedic Association (JOA) hip score. We evaluate osteolysis and bone response of acetabulum or femur, and migration distance of outer head were calculated at the latest follow-up. Kaplan-Meier survivorship rate was investigated to examine implant failure rate. [Results]. The average the Japan Orthopedic Association (JOA) hip score significantly improved from 53.9±16.0 points (preoperative) to 89.6±8.0 points (final follow-up). At the time of the final follow-up, one patients (one hips) had undergone revision to total hip arthroplasty because of groin pain without mechanical failure and migration. The rate of implant survival, with revision because of any reason as the end point, was 100% for femoral components and 97.5% for bipolar head components at a average 12 years (139.9±51.1 months) respectively. A complication that include dislocation and disassembly was not occurred in this study group. Radiographically, all cases is acquired bone ingrowth fixation. Stress shielding of femoral-component was observed 13 cases (32.5%). No femoral-component loosening and osteolysis of femur and acetabular was occurred at final follow-up. Bipolar head shift greater than 2mm is 3cases (7.5%) at final follow-up point, but progressive outer head migration was not occurred (0 %). [Discussion]. Survivorship determined in our study was more favorable than that of previous studies. The our long-term postoperative clinical results of up to Stage3 without the acetabular cartilage surface damage showed more superior to those previously reported for BHA. Recently, larger oscillation angle, proximal porous coating, highly cross-linked PE liner, improved these BHA design concept. Thus, the current BHA can be one of reliable procedure. Based on our results, The BHA for stage III ION, with appropriate surgical indications, may be a good option

Introduction. In recent years, there has been an increase in hip joint replacement surgery using short bone-preserving femoral stem. However, there are very limited data on postoperative periprosthetic fractures after cementless fixation of these stem although the periprosthetic fracture is becoming a major concern following hip replacement surgery. The purpose of this study is to determine incidence of postoperative periprosthetic femoral fractures following hip arthroplasty using bone preserving short stem in a large multi-center series. Materials & Methods. We retrospectively reviewed 897 patients (1089 hips) who underwent primary total hip arthroplasty (THA) or bipolar hemiarthroplasty (BHA) during the same interval (2011–2016) in which any other cementless, short bone-preserving femoral stem was used at 7 institutions. During the study, 1008 THAs were performed and 81 BHAs were performed using 4 different short femoral prostheses. Average age was 57.4 years (range, 18 – 97 years) with male ratio of 49.7% (541/1089). Postoperative mean follow-up period was 1.9 years (range, 0.2 – 7.9 years). Results. Overall incidence of postoperative periprosthetic femoral fractures was 1.1% (12/1089). The mean age of these 12 patients were 71.2 year (range, 43 – 86 years). Seven patients were female and other 5 were male. Time interval between primary arthroplasty and fracture were mean 1.1 years (range, 0.1 – 4.8 years). Injury mechanism is a slip in 10 fractures and fall from 1m or less in 2. Three fractures occurred after BHA while 9 occurred after THA. Four fractures were in type AG and other 8 were in type B1 according to Vancouver classification. Of the 4 with AG type, 2 underwent open reduction and internal fixation and 2 took conservative management. Of the 8 with B1 type, 6 underwent open reduction and internal fixation and 2 took conservative management. Conclusion. The prevalence of postoperative periprosthetic femoral fractures was 1.1% in a multicenter retrospective analysis of 1089 hips. Our findings suggest that postoperative periprosthetic fracture can occur after hip replacement surgery using short bone-preserving stem although the incidence is relatively low

There have been numerous reports regarding “pseudotumor” associated with hip arthroplasty. We present two reports in which main etiology in the pseudotumor formation was titanium (Ti), but not cobalt-chromium (Co-Cr). We should keep in mind that Ti analysis is essential in some cases. (Case 1) A 68-year-old male presented to our institution because of right hip pain and lower extremity swelling four years after a bipolar hemiarthroplasty. MRI predicted a cystic pseudotumor. However, revision surgical findings showed no apparent cause of ARMD previously described in the literatures. Postoperative analysis showed that the metal debris mainly originated from the Ti alloy itself. (Case reports in Orthopedics, vol.2014, Article ID 209461, 4 pages). (Case 2) A 77-year-old female presented to our institution because of right hip pain and swelling six years after a total hip arthroplasty using a cable trochanteric reattchment. Plain radiographs demonstrated evidences of severe osteolysis and multiple fragments of the broken cable. However, MRI predicted a psudotumor(See Figure 1). Postoperative analysis clarified that main etiology in the pseudotumor formation was the stem mede of Ti, but not the cable made of Co-Cr