The radiographic and histological features of radiolucent areas at the cement-bone interface were correlated in 15 specimens retrieved at post-mortem from patients who had undergone cemented total hip arthroplasty, two weeks to 15 years prior to death. All but one of the components were securely fixed, as demonstrated by direct measurements of micromotion. Extensive radiolucencies were present ...

aorta, which milks edema fluid from the adjacent lung, increasing lymphatic return; this re-aerates that portion of the lung, creating a ‘kinetic border line’ [1] . A similar mechanism likely accounts for the subpleural peripheral radiolucent rim noted in our patient. Rapid respiration and subsequent rapid chest wall and diaphragmatic movement provide a similar pumping effect that leads to the ...

Radiolucent lines at the bone-cement interface beneath the tibial components were assessed in 91 consecutive Oxford meniscal knee replacements in 78 patients. Of 80 knees in which radio-opaque cement was used, a radiolucent line was observed in 77, with a radiodense line in the bone immediately adjoining. Radiolucent lines developed in the majority of patients within one year after operation. I...

BACKGROUND Radiolucent lines and sclerotic margins are often seen on knee radiographs taken a year or longer after knee replacement surgery. Histology has shown that the radiolucent zone is predominantly fibrocartilage and the sclerotic margin is lamellar bone. The reasons for their existence are not clearly understood. METHODS A three-dimensional finite element model of the medial half of th...

It is crucial to understand the distribution of embolic agents inside target liver during and after the hepatic portal vein embolization (PVE) procedure. For a long time, the problem has not been well solved due to the radiolucency of embolic agents and the resolution limitation of conventional radiography. In this study, we first reported use of fluorescent carboxyl microspheres (FCM) as radio...

BACKGROUND The radiographic criteria for identification of loose cementless acetabular components have not been well established. The purpose of this study was to compare the radiographic appearance of a hemispheric porous-coated cementless cup fixed with screws with the intraoperative findings with regard to the fixation status. METHODS The quality of the cup fixation was evaluated at fifty-...

BACKGROUND AND PURPOSE It is difficult to evaluate glenoid component periprosthetic radiolucencies in total shoulder arthroplasties (TSAs) using plain radiographs. This study was performed to evaluate whether computed tomography (CT) using a specific patient position in the CT scanner provides a better method for assessing radiolucencies in TSA. METHODS Following TSA, 11 patients were CT scan...

Anterior midtibial stress fractures are an uncommon but difficult entity for the sports medicine physician. When a transverse radiolucent line is visible in the anterior tibial cortex ("the dreaded black line"), the problem takes on the characteristics of a nonunion and rarely responds to conservative treatment. We recommend taking a more aggressive approach with the use of electrical stimulati...