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Table 1 Location and incidence of spot welds

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

Gruen’s zone   Group C (n = 16) Group S (n = 19)
zone I proximal 0.00 % (0) 5.26 % (1)
distal 18.8 % (3) 5.26 % (1)
zone II proximal 62.5 % (10) 10.5 % (2)
distal 0.00 % (0) 42.1 % (8)
zone III proximal 6.25 % (1) 21.1 % (4)
distal 0.00 % (0) 5.26 % (1)
zone IV   0.00 % (0) 0.00 % (0)
zone V proximal 6.25 % (1) 26.3 % (5)
distal 6.25 % (1) 10.5 % (2)
zone VI proximal 43.8 % (7) 26.3 % (5)
distal 0.00 % (0) 73.7 % (14)
zone VII proximal 0.00 % (0) 0.00 % (0)
distal 12.5 % (2) 0.00 % (0)