NOVAE® Acetabular Cups

The Novae® range is based on the Dual Mobility concept invented in 1975 by Professor Gilles BOUSQUET (Saint-Etienne University Hospital) and Mr André RAMBERT, founder of SERF.

Dual Mobility is the combination of two principles in orthopaedics:

  • Sir Charnley’s low friction concept: use of thick polyethylene with a small 22.2 mm head to reduce wear.
  • The McKee-Farrar concept: use of a large head to reduce the risk of prosthesis dislocation and instability.

The Dual Mobility design is made of two bearing surfaces :

  • Small articulation (or first mobility): articulation of the prosthesis head in the insert.
  • Large articulation (or second mobility): articulation of the insert in the cup.

 

Category:

Characteristics and materials

The Novae® cup range includes 5 implants:

  • Novae® SunFit TH is intended for cementless fixation due to its equatorial press-fit and dual coating.
  • Novae® Evolution TH has two pegs secured with fixing screws (one for the Novae® E TH) to complete bone anchoring.
  • Novae® Coptos TH has two pegs secured with fixing screws (4 screws for the Coptos TH) to complete bone anchoring.
  • Novae® Stick must be cemented to the bone and may be combined with the Novae® K E cross plate.
  • Novae® K E cross plate.

Novae® implants are made from the materials listed below:

  • Cementless cup: Stainless steel + dual coating made of titanium spray and HA.
  • Cemented cup and fixing screw: Stainless steel.
  • Pins: Alumina-coated stainless steel
  • Novae® K E cross plate: Stainless steel and PMMA
  • CI E liner: UHMWPE

Instruments

  • One instrumentation set common for all Novae® acetabular cups. 
  • Additional set for pegs and screw preparation for Novae® Evolution TH and Coptos TH.
  • Specific instrumentation for the Novae® K E cross plate.

Indications

Novae® cups are particularly indicated for patients with a high risk of dislocation and for patients over 65 years.

Indications of the Novae® cup range differ according to the implant:

Novae® Sunfit TH:

  • Coxarthrosis, femoral neck fracture, recurrent dislocation, osteonecrosis, dysplasia, patients at risk of instability (neurology, tumour, removal, desarthrodesis, cognitive disorders, etc.).
  • Surgical removal if bone reconstruction allows, Paprosky type 1 to 2C bone defects.

Novae® E TH:

  • Coxarthrosis, femoral neck fracture, recurrent dislocation, osteonecrosis, dysplasia, patients at risk of instability (neurology, tumour, removal, desarthrodesis, cognitive disorders, etc.).
  • In cases requiring one or more additional anchors.
  • Surgical removal, Paprosky type 1 to 2C bone defects.

Coptos TH:

  • Coxarthrosis, femoral neck fracture, recurrent dislocation, patients at risk of instability (neurology, tumour, removal, desarthrodesis, cognitive disorders, etc.).
  • In cases requiring one or more additional anchors.
  • Surgical removal, Paprosky type 2A to 2C and 3B bone defects.

Novae® Stick:

  • Coxarthrosis, femoral neck fracture, recurrent dislocation, patients at risk of instability (neurology, tumour, removal, desarthrodesis, cognitive disorders, etc.) where primary stability may be compromised. This cup is particularly indicated for prorotic bone.
  • This cemented metal cup is used alone when other coated cup solutions are not appropriate.
  • The Novae® Stick cup can be used for rehabilitation after major acetabular destruction by cementing the cup into a fixed frame. In rehabilitation situations using a K E cross plate, ensure that the parts match in terms of size and cement thickness, etc.

Novae® K E:

  • For use with the Novae® Stick cemented acetabular cup.
  • Major bone destruction, revision arthroplasty.
  • Acetabular reconstructions, for use with the Novae® Stick cemented acetabular cup, Paprosky type 3A and 3B bone defects.

Contraindications of the Novae® cup 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.
  • Drug addiction, alcohol, tobacco or medicine abuse.
  • Mental incapacity of patients to understand the surgeon’s instructions.
  • Systemic or metabolic disorders.
  • Local bone tumours.
  • Obesity, excess weight, high level of physical activity, intense exercise, after a fall.

Surgical technique