Radio-opaque dental prosthetic member
View Patent ↗The invention relates to a prefabricated radio-opaque dental prosthetic member made of a composite material that comprises fibers embedded in a resin, said resin containing at least one radio-opaque component, characterized in that the radio-opaque component consists of nanoparticles having a size lower than 50 nm in order to transmit a portion or the totality of the wavelengths ranging from 400 to 600 nm of an incident radiation.
1. A prefabricated radio-opaque dental prosthetic member, comprising:
a composite material that comprises fibres embedded in a resin, said resin containing at least one radio-opaque component consisting of barium sulphate nanoparticles having a size between 25 and 32 nm and accounting for between 5 and 30% of the prosthetic member, in order to transmit a portion or the totality of the wavelengths ranging from 400 to 600 nm of an incident radiation.
2. A prefabricated radio-opaque dental prosthetic member, comprising:
a composite material that comprises fibres embedded in a resin, said resin containing at least one radio-opaque component consisting of nanoparticles of ytterbium fluoride (YbF 3 ) having a size lower than 50 nm in order to transmit a portion or a totality of the wavelengths ranging from 400 to 600 nm of an incident radiation.
3. A prefabricated radio-opaque dental prosthetic member, comprising:
a composite material that comprises fibres embedded in a resin, said resin containing at least one radio-opaque component consisting of nanoparticles of ytterbium fluoride (YbF 3 ) having a size lower than 35 nm, and accounting for between 3 and 20% by weight of the prosthetic member.
4. The prosthetic member according to claim 1 , wherein the radio-opaque component undergoes a surface treatment consisting of a grafting of an organic or organometallic molecule having at least one chemical group suitable for reacting with a surface of the nanoparticle, and at least one chemical group capable of polymerizing with the resin, the two chemical groups being separated by a molecular chain.
5. The prosthetic member according to claim 4 , wherein the molecule grafted on the nanoparticle is selected from the group consisting of
6. The prosthetic member according to claim 4 , wherein the chemical group suitable for reacting with the surface of the nanoparticle is a complexing function of surface cations of the nanoparticle selected from the group consisting of thiol, phosphine, phosphonate and carboxylate moieties.
7. The prosthetic member according to claim 4 , wherein the molecular chain separating the two chemical groups is selected from the group consisting of a linear or branched C 1 -C 10 alkyl group, an aromatic group and a combination of these groups optionally interrupted by one or more heteroatoms selected from O, N, S or P.
8. The prosthetic member according to claim 4 , wherein the chemical groups capable of polymerizing with the resin are selected from the group consisting of epoxy, methacrylate and acrylate.
9. The prosthetic member according to claim 4 , wherein the grafted molecule is a polymerizable silane.
10. The prosthetic member according to claim 1 , wherein the prosthetic member is a dental or intradental post.
11. The prosthetic member according to claim 3 , wherein the nanoparticles of ytterbium fluoride (YbF 3 ) have a size between 25 and 35 nm.
12. The prosthetic member according to claim 3 , wherein the nanoparticles of ytterbium fluoride (YbF 3 ) have a size of about 30 nm.
13. The prosthetic member according to claim 2 , wherein the radio-opaque component undergoes a surface treatment consisting of a grafting of an organic or organometallic molecule having at least one chemical group suitable for reacting with a surface of the nanoparticle, and at least one chemical group capable of polymerizing with the resin, the two chemical groups being separated by a molecular chain.
14. The prosthetic member according to claim 13 , wherein the molecule grafted on the nanoparticle is selected from the group consisting of
15. The prosthetic member according to claim 13 , wherein the chemical group suitable for reacting with the surface of the nanoparticle is a complexing function of surface cations of the nanoparticle selected from the group consisting of thiol, phosphine, phosphonate and carboxylate moieties.
16. The prosthetic member according to claim 13 , wherein the molecular chain separating the two chemical groups is selected from the group consisting of a linear or branched C 1 -C 10 alkyl group, an aromatic group and a combination of these groups optionally interrupted by one or more heteroatoms selected from O, N, S or P.
17. The prosthetic member according to claim 3 , wherein the radio-opaque component undergoes a surface treatment consisting of a grafting of an organic or organometallic molecule having at least one chemical group suitable for reacting with a surface of the nanoparticle, and at least one chemical group capable of polymerizing with the resin, the two chemical groups being separated by a molecular chain.
18. The prosthetic member according to claim 17 , wherein the molecule grafted on the nanoparticle is selected from the group consisting of
19. The prosthetic member according to claim 17 , wherein the chemical group suitable for reacting with the surface of the nanoparticle is a complexing function of surface cations of the nanoparticle selected from the group consisting of thiol, phosphine, phosphonate and carboxylate moieties.
20. The prosthetic member according to claim 17 , wherein the molecular chain separating the two chemical groups is selected from the group consisting of a linear or branched C 1 -C 10 alkyl group, an aromatic group and a combination of these groups optionally interrupted by one or more heteroatoms selected from O, N, S or P.