Radiolucency adjacent to the tibial component in total knee arthroplasty
| Autor: | Hakon Kofoed, Anette Holm Kourakis, Benni Rossen, Allan Lundberg-Jensen |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
musculoskeletal diseases
Male medicine.medical_specialty Radiography medicine.medical_treatment Radiodensity Total knee arthroplasty Prosthesis Radiologic sign Predictive Value of Tests Medicine Humans Orthopedics and Sports Medicine Tibia Femoral component Aged Orthodontics Aged 80 and over business.industry Middle Aged musculoskeletal system Prosthesis Failure Orthopedic surgery Surgery Female Radiology business Knee Prosthesis |
| Zdroj: | Orthopedics. 25(1) |
| ISSN: | 0147-7447 |
| Popis: | This study determined the accuracy of standard radiographs in observing radiolucency adjacent to the tibial component in total knee arthroplasty. A model of the proximal tibia was used. Plastic sleeves of different heights were glued under the tibial tray to imitate radiolucency. By tilting the x-ray tube 1° at a time, an investigation was performed to determine how many degrees it would take to cover the heights of the different plastic sleeves. In a clinical study of patients at standard follow-up, 21 knees were examined using standard radiographs. Radiographs using image intensification were then taken of the same knees to obtain radiographs with views parallel to the plane of the tibial tray. The results of the study on the phantom showed that a 1 ° deviation of the x-ray beam from the optimal position would obscure a 0.5-mm "radiolucency." This was true for radiolucencies of 2, 3, 4, and 5 mm. This was confirmed in the clinical study where ≤4 mm of radiolucency was obscured on standard radiographs. Therefore, standard radiographs cannot be used to determine radiolucency. The 2-mm radiolucency normally associated with loosening is not clinically valid. |
| Databáze: | OpenAIRE |
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