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Table 2 Retrieval analysis and radiographic evaluation for each bearing group

From: Mid-term progressive loosening of hydroxyapatite-coated femoral stems paired with a metal-on-metal bearing

Bearing group Goldberg corrosion score (0–3 scale) HA coating removal (0–3 scale) Mean thickness of radiolucent lines at latest follow-up
Proximal Distal Proximal (Gruen zones 1 and 7) Distal (Gruen zones 3, 4, and 5)
MoM 2.1 (0.8)* 2.6 (0.5) 2.1 (0.9) 2.9 (1.7) 0.4 (1.3)
CoC 0.8 (0.9) 1.4 (0.8) 1.7 (0.9) 1.7 (1.6) 0
MoP 0.4 (0.9) 1.0 (1.0) 0.8 (0.9) 1.5 (1.7) 0.6 (1.5)
  1. *Statistical significance (p = 0.001)