Leave-on oral care compositions

1. An oral care composition comprising:

a) from about 30% to about 85%, by weight of the composition, of total water content;

b) from about 0.01% to about 10%, by weight of the composition, of a hyaluronic acid or a salt thereof; and

c) from about 0.5% to about 20%, by weight of the composition, of a gum-strengthening polyol, wherein the gum-strengthening polyol comprises trehalose;

wherein the oral care composition is substantially free of abrasives; and

wherein the oral care composition is a leave-on composition.

2. The oral care composition according to claim 1 , wherein the gum-strengthening polyol further comprises rafiose, stachyose, verbascose, isomalt, maltitol, lactitol, maltotriitol, maltotetraitol, polyglycitol, or combinations thereof.

3. The oral care composition according to claim 2 , wherein the gum-strengthening polyol further comprises isomalt.

4. The oral care composition according to claim 1 , further comprising from about 0.1% to about 10%, by weight of the composition, of a polyacrylic acid.

5. The oral care composition according to claim 1 , wherein the hyaluronic acid has a weight average molecular weight of from about 900,000 Daltons to about 5,000,000 Daltons.

6. The oral care composition according to claim 1 , further comprising an additional polymer selected from the group consisting of xanthan gum, carrageenan, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, hydroxymethyl cellulose, polyvinyl pyrrolidine, co-polymers of maleic anhydride with methyl vinyl ether having a weight average molecular weight of about 30,000 Daltons to about 1,000,000 Daltons, and combinations thereof.

7. The oral care composition according to claim 1 , wherein the total water content is from about 40% to about 80%, by weight of the composition.

8. The oral care composition according to claim 1 , further comprising a humectant selected from the group consisting of glycerin, sorbitol, xylitol, erythritol, butylene glycol, polyethylene glycol, propylene glycol, and combinations thereof.

9. The oral care composition according to claim 1 , wherein the oral care composition is substantially free of ethanol.

10. The oral care composition according to claim 1 , further comprising a vitamin selected from the group consisting of Vitamin C, Vitamin E, Vitamin B5, and combinations thereof.

11. A method of improving Gum Health of a subject, the method comprising the steps of applying the oral care composition of claim 1 onto intraoral tissue of the subject, and leaving the oral care composition on the intraoral tissue for a duration of time of from about 1 minute to about 1000 minutes; and optionally wherein the applying step is conducted as the last step of an oral hygiene regimen.

12. The method of claim 11 , wherein the oral care composition is applied onto the intraoral tissue of the subject with an applicator comprising a handle and a head to spread the oral care composition onto the intraoral tissue of the subject.

13. A method of improving Gum Health of a subject, the method comprising the steps of:

(a) brushing teeth of the subject with an antibacterial toothpaste; and

(b) subsequently, applying the oral care composition of claim 1 onto intraoral tissue of the subject, and leaving the oral care composition on the intraoral tissue for a duration of time of at least about 2 minutes.

14. The method of claim 13 , wherein the oral care composition is applied onto the intraoral tissue of the subject with an applicator comprising a handle and a head to spread the oral care composition onto the intraoral tissue of the subject.

15. A kit comprising a toothpaste and the oral care composition according to claim 1 .

16. A kit comprising the oral care composition according to claim 1 and a delivery carrier, wherein the delivery carrier comprises strip, film of material, dental tray, aligner, sponge material, applicator, or mixtures thereof.

17. The oral care composition according to claim 1 , wherein the gum-strengthening polyol is present in the amount of about 0.5% to about 18%, by weight of the composition.

18. The oral care composition according to claim 1 , wherein the hyaluronic acid is present in the amount of from about 0.1% to about 5.0%, by weight of the composition.

19. The oral care composition according to claim 6 , wherein the additional polymer is present in the amount of from about 0.1% to about 10%, by weight of the composition.

20. The oral care composition according to claim 8 , wherein the humectant is present in the amount of from about 1% to about 50%, by weight of the composition.