Bipolar Cup System

Bipolar Cup is an alternative to total hip arthroplasty, particularly indicated in the treatment of displaced femoral neck fractures in elderly patients.

Bipolar Monoblock Cup

The Bipolar Monoblock cups is comprised of an outer Stainless steel metal dome, an inner liner of Ultra high molecular weight polyethylene. Bipolar Monoblock cups has the following basic design features: The metal dome of Bipolar Monoblock cups is fabricated from the stainless steel 316 L. It consists of an outer metal surface of stainless steel 316L designed to articulate directly in the patient acetabulum by press fit with surface roughness Ra= 0.05 μm. It has an inner ultra-high molecular weight polyethylene (UHMWPE 1050) surface which is assembled during manufacturing. Modular femoral head will articulate in liner. Surface roughness of this articulating surface is Ra= 0.05 μm The Modular head will be assembled in bipolar cup by surgeon during implantation and intended to be used with femoral stem.

Femoral Stem System Modular femoral head

Modular head is designed to mate with 12/14 taper of femoral stem through taper-locking arrangement and to be articulated with Modular Liner.

Modular heads are manufactured from High NItrogen Stainless Steel as per ISO 5832-9.

  • Available in 5 sizes ranging from diameter (Ø) 22 & 28mm with different offsets viz.+0.0, +3.5, -3.5, +4.0, -4.0, +7.0. Surface roughness value of outer articulating surface is Ra= 0.05 μm.
  • The Bipolar Monoblock shell is available in 21 different sizes ranging from 37 to 63mm. 37 to 51mm in 1mm increment and from 53 onwards in 2mm increment.

Bi-polar & Modular Head Compatibility

Sr. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Bi-polar Cup Size 37 38 39 40 41 42 42 44 45 46 47 48 49 50 51 53 55 57 59 61 63
Modular Head 1 22 22 22 22 22 22 22 28 28 28 28 28 28 28 28 28 28 28 28 28

Cost effective system compared to a total hip replacement

  • Collarless, double tapered, polished high nitrogen stainless stell stem, designed to facilitate accurate placement of the prosthesis in the cement mantle.
  • Result are signicantly better than would be expected with conventional Hemiarthroplaty in this group of patients
  • Comparable with results of total hip replacement (THR) but without the risk of dislocation