Figure 1From: 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/(C/(B1+B2)). Yeung's CBR score can also be worked: C/(B1+B2+C).Back to article page