Libra® Stems

The Libra® range of implant is composed by self locking stems dedicated to primary total hip arthroplasty or revision surgery.  The stems have a 11/13 (4°) taper.


Characteristics and materials

Characteristics :

  • Standard or lateralised, collared or collarless version.
  • Cemented or cementless versions, with or without support.
  • CCD angle of 130°.
  • A 11/13 (4°) taper which needs to be combined with SERF “SI” or “SD” heads with the same 11/13 taper.

Materials :

  • Cementless stems: titanium alloy and HAP
  • Cemented stems: fully polished high-nitrogen stainless steel.
  • Femoral heads: “SI” made from stainless steel or “SD” made from Biolox® delta ceramic.


  • An unique instrumentation
  • A wide choice of broach handles for the different approaches : posterior, posterolateral, anterior and anterolateral.


The Libra® stem range is indicated in the following cases:

  • Primary or secondary arthrosis
  • Fractures of the proximal femur
  • Revision of a previous surgery, including hip arthroplasty
  • For revision of surgery other than hip arthroplasty, the implantation of the femoral stem must not interfere with the equipment that is not removed, if applicable
  • For hip arthroplasty revision surgery, the implanted femoral stem must be compatible with the equipment that has not been removed if applicable
  • Only for a cementless femoral stem implantation, these indications are appropriate according to the following classifications: type 1, 2A and 2B of the Paprosky classification.

Contraindications of the Libra® stem range are as follows:

  • Localized or systemic acute or chronic infection
  • Skeletal immaturity
  • Pregnant or nursing women
  • Known allergy to one of the prosthesis components
  • Severe muscular, neurological, or vascular deficiency affecting the concerned limb
  • Bone degradation or bone loss, or poor bone quality likely to affect the stability of the implant
  • Local bone tumors
  • Obesity.

Surgical technique