Total hip arthroplasty using a three-dimensional porous titanium acetabular cup: an examination of micromotion using subject-specific finite element analysis

Table 3 Modified DeLee and Charnley skeletal fixation score for the acetabulum

	Fixation grade	Radiolucency by zone	Hips (n)
Bone ingrowth, stable	IA	None	47
	IB	One zone	21
	IC	Two zone	4
Fibrous ingrowth, stable	II	Complete RLL < 2 mm all zones	1
Fibrous fixation, unstable	III	Progressive RLL Zone 3, complete RLL	0
		≥2 mm all zones, or socket migration

ISSN: 1471-2474