Table 2.

Radiographic findings (N = 290)

Radiographic characteristic	Actis (n = 144)	Corail (n = 146)	P value
Subsidence ≥ 2 mm	1	1	–
Radiolucent lines ≥ 2 mm	0	0	–
Pedestal formation (1-year)	6 (4.2)a	9 (6.1)	0.442
Spot weld formation
8-week   1-year	55 (38.2) 130 (90.3)	92 (63.0) 142 (97.3)	< 0.001 0.014
Cortical hypertrophy
8-week   1-year	4 (2.8) 21 (14.6)	4 (2.7) 9 (6.2)	0.984 0.019
Calcar rounding
8-week   1-year	9 (6.3) 67 (46.5)	6 (4.1) 69 (47.3)	0.411 0.901
Calcar atrophy
8-week   1-year	12 (8.3) 13 (9.0)	3 (2.1) 1 (0.7)	0.016 0.001
Stress shielding
8-week   1-year	2 (1.4) 11 (7.6)	5 (3.4) 20 (13.7)	0.259 0.095

^aData are expressed as number (percent)