Table 5.

Radiographic analysis of the unrevised hips

Component	Definitive loosening		Probable loosening		Possible loosening
	Number of hips	Time until loosening (years)*	Number of hips	Time until loosening (years)*	Number of hips	Time until loosening (years)*
Acetabular†	2	18.3 (18.2–18.3)	2	16.2 (13.9–18.4)	15	15.9 (9.0–23.0)
Femoral‡	6	18.9 (15.9–22.6)	1	23.2	11	17.9 (14.0–22.8)

* Values are expressed as averages, with ranges in parentheses; ^†according to the criteria of Hodgkinson et al. [9]; ^‡according to the criteria of Harris et al. [8].