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Home Biotechnologies Endoprosthesis With Sapphire Head For The Treatment Of The Diseases And Damages Of The Hip Joint

Endoprosthesis With Sapphire Head For The Treatment Of The Diseases And Damages Of The Hip Joint

Description

Different artificial joints with metal, ceramic, metal-polymer and ceramic polymer trybological pairs which correspond to the natural biomechanical joint "head-acetabulum" are widely used for the hip joint arthroplasty at present time. Along with positive qualities of modern ceramic, polymer and metal con-structions, they have some disadvantages, such as: insufficient biological inactivity and superfluous abrasion of the components. These factors lead to short life of the implant. Moreover, accumulation of toxic and carcinogenic substances in the soft tissue due to abrasion of the implant causes serious complications in up to 30%-40% cases. We developed endoprosthesis with sapphire head for treat-ment of diseases and damages of the hip join.

Innovative Aspect and Main Advantages

Endoprosthesis consists of a metal stem, sapphire head and lowmolecular polyethylene intermediate layer. Sapphire heads manufactured from pure material storage-oxide, which was synthesized in the temperature >2000° C.

Sapphire head has the following characteristics and advan-tages:

  • does not resolve and its qualities do notchange during the patient's life; has high level of biological compatibility;
  • has constant effect of the friction (f = 0,05-0,10) with defined crystallography of the contacted sapphire trybilogical situations;
  • has high durability;
  • may bear 50kN;
  • may be polished to high degree of the purity (higher then in metal and ceramic analogs).

In comparison with metal heads, allergic reactions are excluded. In comparison with corundum ceramic heads, single-crystal head is more durable because the sapphire is homogeneous and does not have bloc's borders, that results in high wearproofness of material.

Areas of Application

Orthopedy and traumatology.


Fig. 1 General veiw of the hip joint endoprosthesis with sapphire head


Fig. 2 X-ray photograph of the patient before opera-tion (a)
and after operation (b)

Stage of Development

Endoprosthesis with sapphire head is developed. Prototype samples are made and studied in experiments. Animal trials of the samples and clinical approbation in 10 patients are done.

Contact Details

Dr. Volodimir Filipenko
Sytenko Institute of Spine and Joint pathology, Ukrainian Academy of Medical Sciences, Director: Nicolay Korzh
Address: 80, st. Pushkinskaya, Kharkov, 61024, Ukraine
Tel. (8-057) 704-14-78
Fax (8-057) 700-11-27
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Dr. Leonid Lytvynov
Institute for Single Crystals
Tel: (380) 57-341-01-47
Fax: (380)57-340-86-19
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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