Observational Study
Copyright ©The Author(s) 2018.
World J Orthop. Oct 18, 2018; 9(10): 210-219
Published online Oct 18, 2018. doi: 10.5312/wjo.v9.i10.210
Table 1 Periprosthetic bone density changes within the Gruen zones (G1-14) detected in standardized a.p. and axial X-rays
a.p.Axial
G1: 1 × bony atrophy > 2 mmG8: 1 × bony atrophy > 2 mm
G2: 1 × bony atrophy > 2 mmG9: No abnormality
G3: 3 × bony hypertrophy < 2 mm 16 × RL1G10: 36 × RL1
G4: 47 × RLG11: 21 × RL1
G5: 1 × bony hypertrophy < 2 mm 54 × RL1G12: 31 × RL1
G6: No abnormalityG13: No abnormality
G7: No abnormalityG14: 1 × bony atrophy > 2 mm