Magnetic resonance imaging (MRI) versus single photon emission computed tomography (SPECT/CT) in painful total hip arthroplasty: a comparative multi-institutional analysis.

Objective: To investigate the value of MRI in comparison to single photon emission computed tomography (SPECT)/CT in patients with painful hip arthroplasties.

Methods: A prospective, multi-institutional study was performed. Therefore, 35 consecutive patients (21 female, 14 male, mean age 61.

Maintenance of bone mineral density after implantation of a femoral neck hip prosthesis.

Background: Stress shielding of the proximal femur has been observed in a number of conventional cementless implants used in total hip arthroplasty. Short femoral-neck implants are claiming less interference with the biomechanics of the proximal femur. The goal of this study was to investigate the changes of bone-mineral density in the proximal femur and the clinical outcome after implantation of a short femoral-neck prosthesis.

Reliability of the Crowe und Hartofilakidis classifications used in the assessment of the adult dysplastic hip.

Objective: To assess the inter-observer and intra-observer reliability of two commonly used radiographic classification systems in the evaluation of hip dysplasia in skeletally mature adults.

Design: Three observers with different levels of training independently classified 62 dysplastic hips on 51 standard anteriorposterior pelvis radiographs according to the criteria defined by Crowe and by Hartofilakidis. To assess intra-observer reliability, the same radiographs were reviewed 3 months later by the same observers.

Assessment of femoral component migration in total hip arthroplasty: digital measurements compared to RSA.

The aim of this study was to determine the accuracy of the software system "Düsseldorf Migration Analysis - Femoral Component Analysis" (DMA-FCA) in measuring stem migration in total hip arthroplasty (THA) on digitised anteroposterior radiographs of the pelvis. Bony and implant landmarks on two consecutive radiographs were used for measurements of subsidence and varus-valgus tilt. The accuracy of the method was determined by reference to radiostereometric measurements (RSA).

Complications after total knee arthroplasty: a comprehensive report.

In most reports of complications following TKA, the method of assessment and report of complications is not defined specifically. It is thus unclear whether certain complications did not occur or were simply not assessed at all. A detailed list of possible complications following TKA was developed, and the occurence of complications in 567 primary TKAs was followed up meticulously according to this list for one year postoperatively.

Robotic total knee arthroplasty: the accuracy of CT-based component placement.

Background: Accurate alignment of the components in total knee arthroplasty is important. By use of postoperative CT controls, we studied the ability of a robotic effector to accurately place and align total knee arthroplasty (TKA) components according to a purely CT-based preoperative plan.

Patients And Methods: Robotic TKA was performed in 13 patients (6 men) with primary gonarthrosis.

Repetitive low-energy shock wave treatment for chronic lateral epicondylitis in tennis players.

Background: There is conflicting evidence regarding extracorporeal shock wave treatment for chronic tennis elbow.

Hypothesis: Treatment with repetitive low-energy extracorporeal shock wave treatment is superior to repetitive placebo extra-corporeal shock wave treatment.

Methods: Seventy-eight patients enrolled in a placebo-controlled trial.

The internal calcar septum and its contact with the virtual stem in THR: a computer tomographic evaluation.

The internal calcar septum is a ridge of cortical bone protruding from the inner cortical wall of the proximal femur into the medullary canal. It extends from the lesser trochanter into the femoral neck and narrows the femoral cavity in its dorsal third. This region is essential for THR stability, but the degree of contact between the septum and standard THR implants has never been studied.

Cementless total hip replacement with subtrochanteric femoral shortening for severe developmental dysplasia of the hip.

Introduction: Total joint replacement in patients suffering from developmental dysplasia of the hip poses specific technical difficulties due to insufficient bone stock at the site of the original and secondary acetabulum and a narrow, cranially displaced proximal femur.

Materials And Methods: Twelve hips with severe congenital dislocation (4 Crowe type II, 5 type III, 3 type IV) were treated with cementless, porous structured total hip replacement. The cup was implanted at the anatomic height, a femoral segment was resected below the minor trochanter to reduce the femoral component in all cases.

Shock wave application for chronic plantar fasciitis in running athletes. A prospective, randomized, placebo-controlled trial.

Background: Recent articles have reported success with repeated low-energy shock wave application for treatment of chronic plantar fasciitis in runners.

Hypothesis: Shock wave treatment for chronic plantar fasciitis is safe and effective.

Study Design: Prospective, randomized, placebo-controlled trial.