Background This study aimed to explore mid-term clinical results of cementless total hip arthroplasty (THA) with modified trochanteric osteotomy in Crowe type IV developmental dysplasia of the hip (DDH). Methods Thirteen patients (13 hips) with Crowe type IV DDH who underwent THA with modified trochanteric osteotomy between May 2013 and October 2015 were retrospectively analyzed. The mean follow-up duration was 5.2 years (range, 4.9–6.1 years). Results The mean Harris Hip Score (HHS) significantly (p < 0.05) improved from 30.7 (range, 22–38) to 87.5 (range, 83–93). The mean leg length discrepancy (LLD) was 53.4 mm (range, 42.1–68.5 mm) preoperatively. The final LLD was 5.6 mm (range, 2.4–9.1 mm; p < 0.05). The mean leg length after surgery was 47.4 mm (range, 33.6–67.2 mm) and the femur shortening distance was 43.8 mm (range, 31.2–53.4 mm). The average duration of bone union for the greater trochanter (GT) was 2.5 months (range, 1.5–3.6 months). There was no infection, GT non-union, or loosening (septic or aseptic) of the stem or cup in any case. Conclusions THA with modified trochanteric osteotomy with a cementless cup is an effective treatment for Crowe type IV DDH. It can rebuild complex biomechanics and biology of hip dysplasia without increasing complications.
Background Some propitious mid- and long-term studies had been reported for MoM bearings; however, most studies have addressed specific patient groups rather than younger, active patients, who probably represent the most suitable population for investigations on wear and osteolysis. The purpose of this study to evaluate the long-term results of second-generation metal-on-metal cementless total hip arthroplasty (THA) in patients aged <50 years. Methods From December 1997 to January 2004, primary THA using a metal-on-metal bearing cementless implant was performed in 63 patients (72 hips) aged <50 years. The mean follow-up duration was 18.6 (range, 15.9–22.1) years, and the mean age at initial operation was 39 (range, 22–49) years. Clinical results, complications, survivorship, osteolysis, and aseptic loosening were evaluated. Results The mean Harris hip score and Western Ontario and McMaster Universities Arthritis Index scores were improved from 57.8 (range, 28–69) points and 73.4 (range, 63–94) points preoperatively to 91.7 (range, 80–100) points and 25.5 points (range, 17–38) points, respectively, at the last follow-up. Osteolysis lesions were found in 12 hips (acetabulum, 6 and femur, 6). The notching occurred on the femoral stem neck occurred in 12 hips. The mean serum cobalt and chromium concentrations were 2.3 (range, 0.2–10.6) μg/L and 1.7 (range, 0.4–8.1) μg/L, respectively, at a mean follow-up of 12.7 years in 32 patients (50.1%). The Kaplan-Meier survivorship curve analysis with revision for any reason as the endpoint revealed that 93.1% survived at 18.6 years’ follow-up. Conclusions Second-generation metal-on-metal cementless THA was found to produce satisfactory clinical and radiographic results with a low revision rate for osteolysis and aseptic loosening in patients aged less than 50 years.
Background Failed treatment of subtrochanteric fractures commonly leads to pain, limping, and poor function. Cementless total hip arthroplasty (THA) could be an option as a salvage procedure in such cases. This study was to evaluate the clinical and radiological results and complications of this treatment in our hospital. Method Eighteen cementless THAs for failed treatment of subtrochanteric fractures were performed at our institution between January 2001 to December 2017. There were eleven males and seven females, and the average age was 74 years (range 57.0-89.0). Eight patients were previously operated with an intramedullary nail, six patients were treated with a dynamic hip screw, two patients were treated with an angled blade plate, one patient was treated with a proximal femur locking plate, and one patient was treated with a dynamic compression plate. Results The mean follow-up was 5.2 years (range 2.2-10.8). The mean duration of the operation was 98.0 minutes (standard deviation [SD],15.4; range 70-135). The mean total blood loss was 992.2 mL (SD,171.2; range 640-1260 mL), and the amount of transfusion was 2.2 units (SD, 0.8, range 1-4). The mean Harris hip score (HHS) was 38.2 (SD, 9.3; range, 24-56) preoperatively and 85.4 (SD, 4.9; range, 79-92) at the last follow-up. Compared to the patients treated with plate-screws, those treated with an intramedullary nail had significantly shorter surgical duration, fewer blood transfusions, and less intraoperative blood loss. Kaplan-Meier survivorship with an endpoint of revision was 94.4% (95% confidence interval 72.7-99.9) at five years. Conclusion Cementless THA is one of the acceptable procedures for failed treatment of the subtrochanteric fracture with fewer complications.
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