1. A dental post made of composite material comprising long fibers embedded in a resin matrix, said post being able to transmit visible radiation when lit with a dental lamp to ensure the polymerization of a product for setting said post in a tooth’s root canal, said post having a specific color determined before its insertion into the canal, wherein it contains at least one thermochromic substance able to provide said specific color when it is at ambient temperature and to make it lose its color when inserted into the canal.
2. The dental post of claim 1 wherein its thermochromic substance content is between 0.02 and 0.2% by weight of the post.
3. The dental post of claim 1 wherein its thermochromic substance content is between 0.1 and 1% by weight of the resin matrix.
4. The dental post of claim 1 wherein the thermochromic substance is such that its specific color loss occurs at a threshold temperature between 30 and 40\xb0 C.
5. The dental post of claim 4 wherein the thermochromic substance is such that said threshold temperature is approximately 31\xb0 C.
6. The dental post of claim 1 wherein the thermochromic substances are enclosed in micro-capsules.
7. The dental post of claim 6 wherein the envelopes of the micro-capsules are made of an acrylic resin.
8. The dental post of claim 1 wherein the resin matrix contains at least one Bisphenol-A-based monomer.
9. The dental post of claim 8 wherein said monomer is BisGMA resin based.
10. The dental post of claim 1 wherein said post contains radiopaque fibers.
11. The dental post of claim 10 wherein the radiopaque fibers contain a metal oxide, and notably zircon.
12. A method for forming a rod by pultrusion used to constitute, after machining, a dental post made of composite material, the method comprising:
embedding long fibers and at least one thermochromic substance enclosed in micro-capsules in a resin matrix; and
wherein the temperature at which pultrusion is performed is lower than the micro-capsules’ melting temperature.
13. The method of claim 12 wherein the temperature at which pultrusion is performed is lower than 200\xb0 C.
14. A kit comprising:
a plurality of dental posts of claim 1, and
wherein each of the plurality of posts having a specific color characteristic of a diameter of said post.
15. The kit of claim 14 wherein the diameters of said plurality of posts comprise a diameter between 0.8 and 2.3 mm.
16. The kit of claim 14 containing 4 different diameters of posts.
17. The kit of claim 14 further comprising a plurality of drills having diameters identified by a color corresponding to the posts having the same diameter.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A hair styling composition comprising:
(a) from about 0.04% to less than 1.5% active of a holding polymer;
(b) hydroxyethyl cellulose; and
(c) a carrier selected from the group consisting of methanol, ethanol, N-propanol, isopropanol, and a mixture thereof;
wherein the ratio of (a) to (b) is about 1:2.2 to about 1:0.4, and the holding polymer comprises a polymer which comprises a monomer combination of vinyl caprolactam, methacrylamidopropyl dimethylamine and vinylpyrrolidone.
2. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:0.4.
3. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:0.7.
4. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:1.
5. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:1.3.
6. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:1.6.
7. A hair styling composition according to claim 1 wherein the ratio of (a) to (b) is about 1:1.9.
8. A hair styling composition comprising:
(a) from about 0.04% to less than 1.5% active of a holding polymer;
(b) a nonionic dextran; and
(c) a carrier selected from the group consisting of methanol, ethanol, N-propanol, isopropanol, and a mixture thereof;
wherein the ratio of (a) to (b) is about 1:2.2 to about 1:0.2, and the holding polymer comprises a polymer which comprises a monomer combination of methacrylamidopropyl dimethylamine and vinylpyrrolidone.
9. A hair styling composition according to claim 8, wherein the holding polymer comprises a polymer which comprises a monomer combination of vinyl caprolactam, methacrylamidopropyl dimethylamine and vinyl pyrrolidone.
10. A hair styling composition according to claim 1 wherein the holding polymer consists essentially of a polymer which comprises a monomer combination of vinyl caprolactam, methacrylamidopropyl dimethylamine and vinyl pyrrolidone.
11. A hair styling composition according to claim 8 wherein the holding polymer consists essentially of a polymer which comprises a monomer combination of methacrylamidopropyl dimethylamine and vinyl pyrrolidone.
12. A hair styling composition according to claim 1 wherein the holding polymer is present in the composition in an amount of from about 0.04% to about 1.25% active.
13. A hair styling composition according to claim 8 wherein the holding polymer is present in the composition in an amount of from about 0.04% to about 1.25% active.