Figure 3From: The suitability of an uncemented hydroxyapatite coated (HAC) hip hemiarthroplasty stem for intra-capsular femoral neck fractures in osteoporotic elderly patients: the Metaphyseal-Diaphyseal index, a solution to preventing intra-operative periprosthetic fractureHow to calculate the MDI Score. A: Illustration of the MDI score calculation. B: Intra-operative fracture (VB2), and C: subsequent revision, due to use of JRI HAC LOL Uncemented stem in sub-optimal bone MDI = 11.5. (MDI < 21, cemented stems recommended).Back to article page