Auditory prosthesis for middle-ear and related coating method

1. An auditory prosthesis for middle-ear comprising a portion configured to contact a tympanic membrane,

wherein said portion comprises a substrate-provided with a coating,

wherein said coating is

integrally fixed to said substrate and is

adapted to contact, at least partially, a tympanic membrane;

characterized in that

the coating is made of biocompatible silicone and in that the coating is silanized,

wherein said biocompatible silicone is a Polydimethylsiloxane (PDMS).

2. The auditory prosthesis according to claim 1 , wherein a thickness of said coating ranges from 50 μm to 1000 μm, or from 100 μm to 500 μm.

3. The auditory prosthesis according to claim 1 , wherein the coating has a thickness ranging from 20 μm to 50 μm.

4. The auditory prosthesis according to claim 3 , wherein said thickness ranges from 25 μm to 40 μm.

5. The auditory prosthesis according to claim 1 , wherein said coating is porous, having a plurality of pores.

6. The auditory prosthesis according to claim 5 , wherein each pore of said plurality of pores has a diameter ranging from 20 μm to 800 μm.

7. The auditory prosthesis according to claim 5 , wherein each pore of said plurality of pores has a diameter ranging from 10 μm to 100 μm.

8. The auditory prosthesis according to claim 7 , wherein said diameter ranges from 10 μm to 50 μm.

9. The auditory prosthesis according to claim 5 , wherein a pore density of said plurality of pores ranges from 0.1 to 0.5, said pore density being the ratio between the volume of the plurality of pores and the total volume of the coating.

10. The auditory prosthesis according to claim 1 , wherein said coating comprises two layers, of which

a first layer is compact and in direct contact with said substrate, and

a second layer is porous,

wherein said second layer is:

superimposed on the first layer,

adapted to contact the tympanic membrane, and

has a plurality of pores.