Table 3.

Distribution of implanted cups, according to fixation and type of liner

Cup	Relative value	n. implants
Cemented all polyethylene	1.00	563
135 Contemporary Howmedica (Mahwah, New Jersey, USA)
149 Muller Cremascoli (Milano, Italy),
130 Muller Sulzer (Geneve, Switzerland),
54 Exeter Howmedica,
other types with less than 50 implants each.
Press fit, polyethylene liner	3.73	1938
375 Duraloc De Puy (Warsaw, Indiana, USA)
343 Fitek Sulzer,
336 Duofit PSF Samo (Bologna, Italy),
250 ABG Howmedica,
123 Vitalock Talon Howmedica,
105 PCA Howmedica,
other types with less than 100 implants each.
Press fit, ceramic or metal liner	4.94	2249
1548 AnCA Fit Cremascoli,
276 Duofit PSF Samo,
144 Fitek Sulzer,
133 Standard Cup Protek
other types with less than 100 implants each
Total		4750