Paprosky femur defect. Cutaway artwork of bone degradation in a type IIIA medial-lateral femur cortex defect (Paprosky classification system). This sy
Paprosky femur defect. Cutaway artwork of bone degradation in a type IIIA medial-lateral femur cortex defect (Paprosky classification system). This system is used for revision (replacement or repair) of a hip implant. The ball and socket part of the implant is at top. The rest of the implant consists of a shaft inside the femur (thigh bone). The amount of degradation in the cortical (outer) bone layer determines the amount of bone grafting needed, and whether a cementless implant can replace a cemented one. Type IIIA indicates a large bone defect extending down to the shaft (see C016/6620). Named for US surgeon Wayne G. Paprosky, the classification was developed in the 1980s and 1990s.
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Photo credit: © D & L GRAPHICS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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