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POLARSTEM

Cementless Stem System

POLARSTEM Cementless hip stem

Product Information

Designed to match femoral anatomy

The triple taper, self-locking POLARSTEM design with reinforced proximal body allows for excellent proximal stability.  The shortened stem length and narrow distal top allows for ease of implantation, especially in small intramedullary canals like Dorr Type A femurs.

Implant features and instrument options

POLARSTEM offers several design features that assist with muscle sparing approaches:

• Thick proximal area to help reduce the risk of subsidence

• Shorter stem length than other fully HA coated stems

• Thin distal area with a narrow tip, making it easier to implant through a smaller incision

• Broaches with compaction teeth anterior/posterior and bone cutting teeth medial/lateral that allow for an optimal fit between the stem and cortical bone

• 180 microns of Ti-plasma spray plus 50 microns of HA

Product portfolio

• Standard and lateral versions available in both *collared and collarless options

• The *collared stems provide secondary stability

• Valgus stem available to provide a reduced offset option and address valgus femur types instrument set

• Simple and user friendly instrumentation for all surgical approaches

• Offset of the lateral stems is increased by 3.5 mm compared to the standard stem to better reconstruct the hip biomechanics

• The valgus stem provides a reduced offset option to address difficult valgus, abnormalities

*Collared Stems are only available in the United States. 

References

1. Australian Orthopaedic Association National Joint Replacement Registry Annual report. Adelaide: AOA; 2014

2.Parikh, P. Hill, V. Pawar and J. Sprague, “Long-tern simulator wear performance of an advanced bearing technology for THA,” Orthop Res Soc, San Antonio, TX, Jan 26-29, 2013, 1028

3.Cite: Lutes, W. “POLARSTEM Collarless – My Experience.” A presentation at the POLARSTEM Users Group Meeting, Las Vegas, NV. 2015.

4.http://www.smith-nephew.com/education/resources/video/2014/january/polarstem-design-rationale-and-mid-term-clinical-results/

5.http://www.smith-nephew.com/education/resources/video/2014/january/polarstem-with-verilast-the-perfect-combination/

 

Indications

The POLARSTEM Standard and Lateral Femoral Stems with Ti/HA are indicated for:

  • 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

 

The POLARSTEM Standard and Lateral Femoral Stem with Ti/HA is intended for single use only and is to be implanted without bone cement.

 

Resources

POLARSTEM Resources

Design Rationale

Surgical Technique

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This information is intended for health care professionals in the United States only.

Caution: US Federal law restricts the sale of these devices to or on the order of a physician.