Optimizing Acetabular Component Bone Ingrowth: The Wedge-Fit Bone Preparation Method

Table 2

Failures and complications.

Failure Type	Group 1	Group 2	P value
# Cases	1496	1565	- -
(1) Revisions
(a) Failure of Acetabular Ingrowth (<2 years)	7 (0.5%)	1 (<0.1%)	0.0271
(b) Adverse Wear	3 (0.2%)	0 (0.0%)	0.0735
(c) Late Acetabular Loosening (>2 years)	2 (0.1%)	0 (0.0%)	0.1443
(d) Acetabular Component Shift	1 (<0.1%)	1 (<0.1%)	0.9681
(2) Unrevised Cup shift	16 (1.1%)	7 (0.4%)	0.0424
(3a) Unexplained pain (>2 years, latest F/U)	31 (2.2%)	21 (2.6%)	0.1031
(3b) Unexplained pain (2-4 years, peak pain)	39 (2.6%)	20 (1.3%)	0.0061