Table 1.

Patient selection.

Patients with uncemented cups in Sweden operated between 1994 and 2000	5707
Patients were operated in the region of Stockholm	812
Patients excluded according to the exclusion criteria: posttraumatic arthrosis, deceased, waiting for, or under investigation for, revision surgery.
The five most common cups were selected	395
Patients chose not to participate	185
Patients that failed to attend	3
263 cups in 206 patients. Only one hip/patient was evaluated
206 patients were included in this study