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Table 5 Comparison of stress shielding between cases of the presence and absence of spot welds

From: Finite element analysis of cementless femoral stems based on mid- and long-term radiological evaluation

  Presence of spot welds Absence of spot welds P value
Total number of hips 21 6  
Progression of stress shielding (ratio)a 12 (57.1 %) 1 (16.7 %) 0.086
Stress shielding ≥2nd degree (ratio)b 18 (85.7 %) 1 (16.7 %) 0.001
  1. aStress shielding progressed from ~5 years to ~10 years postoperatively
  2. bSecond-degree or greater stress shielding at ~10 years postoperatively