Uncemented Femoral Stems for Revision Surgery pp 107-110 | Cite as
Degree of Osteoporosis and Its Impact on the Radiographic Results (Bone Stock and Secondary Stability)
Abstract
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Secondary bone stock. With a qualitative assessment, a significant correlation was found between the degree of osteoporosis and secondary bone stock (p < 0.0001). In numerical assessment, the average progression of the bone stock varies significantly depending on the stage of osteoporosis (p < 0.0001): increase of +2.1 points in the absence of osteoporosis (16.2 vs 18.3 points) and reduction of – 4.7 points in the presence of osteoporosis stage 4 (13.3 vs 8.6 points). An osteoporosis can induce bone changes and to be at the origin of severe alterations of the bone stock.
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Secondary stability. In qualitative assessment, there is no significant correlation between the degree of osteoporosis and secondary stability (weighted score) (p = 0.3). In numerical assessment, the results obtained in function of the degree of osteoporosis show a signification difference depending on the stage of osteoporosis (p < 0.0001). So, patients classified as osteoporosis stage 3 (average) had the weakest arithmetic mean; in contrast, osteoporosis stage 4 (poor) has no negative impact on osseointegration.
These results underline the benefits of a numerical evaluation that shows more significant differences which are sometimes difficult to detect in a qualitative assessment.