Libra® Stems

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

Category:

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.

Instruments

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

Indications

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

  • Primary or secondary osteoarthritis.
  • Advanced joint destruction resulting from rheumatoid or post-traumatic arthritis.
  • Fracture or avascular necrosis.
  • Following previous surgery, including hip arthroplasty.
  • Libra® implants are mainly indicated in the case of primary or secondary osteoarthritis, displaced subcapital and transcervical fracture and Paprosky type I to IIB bone defects.

Contraindications of the Libra® stem range are as follows:

  • Acute or chronic local or systemic infection (cardiopathy, decompensated diabetes, continuous haemodialysis, reduced immune response, etc.).
  • Severe muscular, neurological or vascular deficiencies affecting the extremity concerned.
  • Bone destruction or loss, or poor bone quality likely to affect implant stability, severe osteoporosis, major deformity of the joint to be replaced, local bone tumours.
  • All related conditions which could compromise the function or implanting of the prosthesis.
  • Systemic or metabolic disorders,
  • Mental incapacity of patients to understand the surgeon’s instructions,
  • Drug addiction, alcohol, tobacco or medicine abuse,
  • Local bone tumours,
  • Obesity, excess weight, high level of physical activity, intense exercise, after a fall.

Surgical technique