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Dual Mobility System



Dual-mobility cups were designed to reduce risk of dislocation during full ROM. Dislocation is the leading cause of revision after total hip arthroplasty (THA). The dual-mobility technology was developed, featuring a mobile polyethylene liner locked onto a femoral head and articulating in a metallic acetabular shell. The POLARCUP hip system was designed to address the challenges of treating patients - in both primary and revision cases - who are susceptible to dislocation and need greater stability.

Features and Benefits
The dual mobility design results in higher intra-prosthetic stability to address the treatment of patients with a high risk of dislocation (especially for elderly patients) or patients with recurrent dislocation.

Shell and Liner Features
Titanium plasma coating 250 μm 15 to 20% porosity 

Pole obliquity oriented in direction of the load resultant for optimal force allocation.

6° skirt under ½ sphere equator to avoid dislocation

Anti-rotation fins allowing good Peripheral diffusion of constraints 

Equatorial teeth (0.35 mm) Allow a very good primary stability

Self-centering for an equal force transmission

Strongest retention insert on the market
170 to 200 Kg is necessary to press the femoral 
head into the PE-liner

Smoothed entry chamfer parallel to stem neck.

External rim rounded to avoid conflict with soft tissues. 
Minimum thickness: 6.5 mm for 28/47

Shell Options
Titanium-Plasma coated

Stainless steel uncoated (For use with cement only) 

Insert Options
XLPE Mobile Insert

cPE Mobile Insert

Bearing Options
OXINIUM◊ Biolox delta Cobalt Chrome



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Design & Technology

Professor Bousquet and the Medical School of Saint Etienne in France created the DUAL MOBILITY CONCEPT in 1976 to address the problems of hip locations in Total Hip Arthroplasty (THA). The concept was an insert locked on a femoral ball head that moves freely in a thin metallic shell. This Dual Mobility principle combines the advantages of low friction and the use of a big femoral head.

The dual mobility concept had a low dislocation rate, both for primary hip replacement and revision situations including repetitive dislocations.
The POLARCUP has 10 years of clinical history in Europe and in other markets outside the U.S. The POLARCUP System allows surgeons to implant a smaller, constrained femoral component within a larger, anatomically sized polyethylene head.


Neck Preserving Hip Stem

Orthopaedic Data Evaluation Panel (ODEP) Rating Chart

OPDEP ratings

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