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BI-Articular Head Modular

BI-Articular Head Modular

Category: Permedica Orthopedics

INTENDED PURPOSE:


The Modular Bi-Articular Head is intended to be used for the prosthetic replacement of the femoral head in hemi-arthroplasty applications, in combination with a femoral stem and an articular head. It is indicated in partial hip replacement procedures where the acetabular cartilage is not involved in arthrosis disease and therefore an hemi-arthroplasty has been chosen (usually in cases of femoral head fractures).


MATERIALS:

                    METAL SHELL: PM734 highly nitrogenized Stainless Steel forged alloy- ISO5832/9.

                    INSERT: Ultra High Molecular Weight Polyethylene, without calcium stearate- ISO5834/1/2.

STERILIZATION:

                    Method: Ethylene Oxyde (EtO) or irradiation (Beta/Gamma rays - minimum dose 25 kGy) or Vaporized Hydrogen Peroxide (VH2O2).

                    Validity: 5 years (Beta sterilized products)- 10 years (EtO/Gamma/VH2O2 sterilized products).

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Product Information



Permedica Modular Bi-Articular Heads consists in an external shell made of stainless steel alloy and a UHMWPE inner core. The articulation distributed upon a double surface (Articular head and bi-articular Cup) reduces friction against the acetabular cartilage. Positive eccentricity provides for automatic valgus positioning of the cup, reducing the risk of dislocation and improving the stress distribution over the acetabular cartilage.



BI-Articular Head

Modular

22 diameters

39 to 60 mm

28mm socket
Metal shell and polyethylene core are supplied in two separated packaging.
The liner is provided with a special ring which allows retention of the articular head once inserted into the metal shell.
Modular cups are available in a range of sizes from 39 to 60mm, with millimetric increments, with inner socket matching 28 mm articular heads.





                                     







BI-Articular Head Modular