Libertas® HA Uncemented Stem

Biological Fixation. Mechanical Stability. Engineered for Long-Term Performance.

The Libertas® HA Stem is designed to deliver immediate mechanical stability followed by durable biological integration. Built on a titanium alloy platform and enhanced with plasma-sprayed hydroxyapatite, this stem is engineered to optimize cancellous bone compression while supporting long-term fixation.

It is a fixation strategy built around bone response.

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Why Hydroxyapatite (HA)

Hydroxyapatite is chemically similar to the mineral component of human bone. When applied to a titanium substrate, it provides a biologically active surface that encourages rapid bone ongrowth.

The Libertas HA Stem utilizes Hydroxyapatite coating, creating a surface designed to accelerate biological fixation while maintaining strong mechanical adhesion to the implant.

Coating specifications include:
  • Surface roughness: Rt > 30 μm
  • Coating thickness: 150 ± 40 μm
  • Adhesion strength: ≥ 15 MPa
  • Crystallinity: ≥ 60%
Design Features That Support Fixation

The HA coating works in combination with deliberate stem geometry to support mechanical stability at the time of implantation.

  • Trapezoidal cross section designed for initial stability
  • Rectangular distal geometry designed for rotational stability
  • Vertical grooves to enhance axial and rotational fixation
  • Step design to maximize compression loading in cancellous bone
  • Lateral shoulder designed for ease of insertion
  • Tapered neck to increase range of motion
Implant Options

The Libertas HA Stem is available in:

3 Offset Options to facilitate restoration of hip biomechanics

33 stem sizes to accommodate a wide range of femoral anatomies

Collared and collarless configurations

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