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Dual Mobility Hip System

Product Information

POLARCUP Product Information

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.

POLARCUP 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 for optimal fixation.

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

For more detailed information, contact your local sales representative or call Customer Service at 0845 056 8333.

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

Design and Technology

POLARCUP Design and 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 dislocations 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 over 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.


POLARCUP Indications

  • Advanced degeneration of the hip joint as a result of degenerative, post-traumatic or rheumatoid arthritis 
  • Fracture or avascular necrosis of the femoral head 
  • Failure of previous hip surgery: joint reconstruction, internal fixation, arthrodesis, hemiarthroplasty, surface replacement arthroplasty or total hip replacement 
  • All forms of osteoarthritis 
  • Patients with hips at risk of dislocation 
  • Femoral neck fracture or proximal fracture to hip joint

The POLARCUP Dual Mobility System is intended for single use only and depending on its version is to be implanted either with or without bone cement.

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Smith & Nephew is providing information in this site for general educational use only, and does not intend for this to be construed as medical advice or used as a substitute for the advice of your physician. For questions or concerns about a previous or upcoming surgery, Smith & Nephew recommends that you contact your healthcare professional.