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Cementless acetabular component osteolysis measured using 3-D CT scans in patients
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Periacetabular osteolytic lesions can be monitored by 3-D CT in patients with cementless acetabular components at medium- and long-term follow-up, according to this study by Australia and United Kingdom researchers.
Donald W. Howie, MBBS, PhD, FRACS, and colleagues noted the mean size progression of osteolytic lesions was 1.5 cm³ per year when measured through CT scans. They concluded that radiographs measured larger lesions, but only after they were identified through a CT scan. Lesions were tracked in 30 acetabular components from 26 patients during as much as 9-year follow-up using high-resolution CT scans with metal-artifact suppression.
“This is the first study to report on the progression of osteolysis adjacent to cementless acetabular components from medium to long-term follow-up,” the authors stated in the study. “If the initial CT scan at medium-term follow-up shows a high osteolysis rate and the patient activity score is also high, then the size of the osteolytic lesion will increase.”
Patient activity and the amount of osteolysis measured in the initial CT scan were both good predictors of overall size progression; however, the greatest progression was present in patients who had both risk factors, according to the abstract.
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