Alexandra M. Claus

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BACKGROUND Radiographs are the standard clinical tool used to monitor patients with pelvic osteolysis after total hip arthroplasty; however, previous reports have questioned the value and accuracy of this method. With use of a cadaveric model, we investigated the accuracy of radiographs in determining the location and size of periacetabular osteolysis. (More)
Since the introduction of cementless total hip arthroplasty in the early 1980s, concern has shifted from component loosening toward polyethylene wear and osteolysis. The current review of 223 consecutive unselected Anatomic Medullary Locking femoral and acetabular components extends the followup on a series of patients previously reported on at 5 and 10(More)
In this study, we compared the accuracy of radiography, computed tomography, and magnetic resonance imaging in assessing periacetabular osteolytic lesions. Using a previously published cadaver model, we created 87 lesions in pelves implanted with total hip replacement components. The sensitivity for detecting lesions was 51.7% for radiography, 74.7% for(More)
BACKGROUND The development of osteolysis, a commonly reported complication after total hip arthroplasty without cement, is perceived to be related to the amount of polyethylene particles generated from the bearing surfaces. Although the literature has suggested that the prevalence of osteolysis increases with increasing rates of polyethylene wear, this(More)
The current authors summarize insights gained from their experience studying uncemented porous-coated femoral and acetabular hip replacement components retrieved at autopsy. For femoral components, autopsy studies showed that osseointegration occurs over an average 35% of the porous surface with the most predictable ingrowth occurring near the termination(More)
To assess the accuracy of a computer-assisted computed tomography image analysis program in determining the location and volume of periacetabular osteolysis, we designed an osteolysis model by implanting bilateral total hip replacements in human pelvic cadavers and creating osteolytic lesions of varying sizes. The volumes of 48 defects were measured(More)
In this retrospective study, we analyzed the formation of osteolysis with 2 cementless cups to evaluate if surface holes in metal shells influence the radiographic pattern of osteolysis. At a minimum of 10 years' follow-up, serial radiographs of 112 hips with Arthropor cups (having multiple shell holes) and 126 hips with Anatomic Medullary Locking (AML)(More)
Polyethylene wear and pelvic osteolysis are the most common late complications associated with stable cementless total hip implants. This manuscript describes the diagnostic strategies and treatment algorithm used at the senior author's (C.A.E) institution for patients with wear and pelvic osteolysis. This evolving management strategy is based on our(More)
Pathologic fractures of the greater trochanter associated with trochanteric osteolysis are a late complication of total hip arthroplasty that have been described only in case reports. In this study of 208 consecutive total hip arthroplasties with mean 12.2-year radiographic follow-up, we reviewed the incidence, presentation, treatment, and outcome of such(More)
The Ein Bild Röntgen Analyse system is used to radiographically measure femoral head penetration in total hip replacement components. Because determining the accuracy of any wear analysis system is more precise and comparable under in vitro conditions, we used a femoral head migration simulator to assess the accuracy of Ein Bild Röntgen Analyse and(More)