Dermatological composition

Abstract

Dermatological methods of cosmetic, therapeutic, prophylactic, and/or diagnostic treatment by topically applying compositions comprising a multiplicity of particles, at least one of the particles comprising porous and/or polycrystalline silicon. Included are methods and compositions for sun protection applications. The use of porous silicon, polycrystalline silicon, and porous silicon oxide mirrors is disclosed.

1 .- 13 . (canceled) 
     
     
         14 . A method of protecting the skin or a human or animal from UV radiation comprising the step of topically applying a dermatological composition comprising a plurality of particles comprising polycrystalline silicon. 
     
     
         15 . A method according to  claim 14  wherein the polycrystalline silicon has a particle size in a range of 0.01 to 250 μm. 
     
     
         16 . A method according to  claim 14  wherein the composition comprises a dermatologically acceptable carrier. 
     
     
         17 . A method according to  claim 14  wherein the polycrystalline silicon is resorbable. 
     
     
         18 . A method according to  claim 14  wherein the composition comprises a plurality of mirrors made from a plurality of layers of polycrystalline silicon, each mirror comprising a plurality of layers, each layer comprising polycrystalline silicon. 
     
     
         19 . A method according to  claim 18  wherein the composition comprises a plurality of groups of mirrors, each group reflecting radiation over a wavelength range that differs from that of the other groups. 
     
     
         20 . A method according to  claim 14  wherein the composition further comprises at least one beneficial substance. 
     
     
         21 . A method according to  claim 20  wherein the at least one beneficial substance is selected from the group consisting of a biological material, a genetic material, a radioactive material, an antibacterial and a luminescent material. 
     
     
         22 . A method according to  claim 14  wherein the polycrystalline silicon is present in the form of polycrystalline silicon oxide. 
     
     
         23 . A dermatological composition comprising a multiplicity of particles, each particle comprising polycrystalline silicon. 
     
     
         24 . A dermatological composition according to  claim 23  wherein the polycrystalline silicon has a particle size in a range of 0.01 to 250 μm. 
     
     
         25 . A dermatological composition according to  claim 23  wherein the composition comprises a dermatologically acceptable carrier. 
     
     
         26 . A dermatological composition according to  claim 23  wherein the polycrystalline silicon is resorbable. 
     
     
         27 . A dermatological composition according to  claim 23  wherein the composition comprises a plurality of mirrors made from a plurality of layers of polycrystalline silicon, each mirror comprising a plurality of layers, each layer comprising polycrystalline silicon. 
     
     
         28 . A dermatological composition according to  claim 23  wherein the composition comprises a plurality of groups of mirrors, each group reflecting radiation over a wavelength range that differs from that of the other groups. 
     
     
         29 . A dermatological composition according to  claim 23  wherein the composition further comprises at least one beneficial substance. 
     
     
         30 . A dermatological composition according to  claim 29  wherein the at least one beneficial substance is selected from the group consisting of a biological material, a genetic material, a radioactive material, an antibacterial and a luminescent material. 
     
     
         31 . A dermatological composition according to  claim 23  wherein the polycrystalline silicon is present in the form of polycrystalline silicon oxide.