Composition for Treatment of Teeth and Method of Use

The present invention relates generally to oral hygiene and more specifically to the area of cosmetic oral hygiene. In even greater particularity the present invention relates to bleaching the teeth and to protecting the adjacent gingival tissues while doing so. Still more particularly the present invention may be described as a mucoprotectant gel used with hydrogen peroxide to bleach the teeth and protect the mucous membranes.

The cosmetic whitening of the teeth has been a prevalent concern of the modern consumer. Traditionally abrasives and bleaches have been used to effectuate the desired whitening. One of the agents used by dentists for in-office cosmetic bleaching has been hydrogen peroxide. While hydrogen peroxide is a very safe chemical in dilute quantities it is very caustic and will cause severe tissue damage at higher concentrations. Thus, its use has heretofore been limited to controlled use in the dentist's office. Recently, dentists have attempted to bleach teeth using a vacuformed mouthpiece which fits over the teeth and adjacent tissue with a dilute hydrogen peroxide gel (11/2% hydrogen peroxide). the technique is laudable, the continued exposure of the mucous membranes of the mouth to hydrogen peroxide oft en seems to result in oral irritation which necessitates discontinuation of the treatment. Therefore a need exists for a means for protecting the gum tissues while permitting hydrogen peroxide to contact the teeth.

It is an object of the present invention to provide an effective means to protect the gums from the caustic action of relatively concentrated hydrogen peroxide without deterring the effectiveness of the hydrogen peroxide bleaching agent for the teeth.

Yet another object of the invention is to provide a means for the patient to safely bleach his teeth at home yet under the dentist's supervision.

Still another object of the invention is to provide a means for bleaching of vital and non-vital teeth as well as bonded surfaces using a mouthpiece.

A further object of the invention is to provide a fluoride treatment to the teeth which may also be bleached.

These and other objects and advantages of my invention are advantageously accomplished using a vacuformed mouthpiece and a concentrated hydrogen peroxide oxidizer and a gelatinous mucoprotectant which forms a hydrophobic coating on the mucous membranes of the mouth to prevent the hydrogen peroxide from attacking these surfaces, yet which does not form such a protective coating on the teeth. My gelatinous mucoprotectant comprises sodium stearate USP, a gelling agent, glycerine, and water with the amount of water or glycerin included varying in an inverse relationship. The sodium stearate USP combines with the hydrogen peroxide to form stearic and palmitic acids which are readily deposited on the mucous membranes to form a protective barrier.

The appended drawings are illustrative of the use of my compound and form a portion of this disclosure, wherein:

FIG. 1 is a perspective view of a vacuformed mouth guard and a dispenser container for my combined composition;

FIG. 2 is a sectional view of the mouth guard in situ about the teeth with my composition in contact therewith; and

FIG. 3 is a pictorial representation of my composition in its storage containers.

As noted hereinabove hydrogen peroxide is an effective whitener of teeth and bonded dental material, yet it is caustic to the adjacent tissues. Therefore, to enable the long-term use of hydrogen peroxide in a loosely supervised, at home, treatment regime requires the use of a mucoprotectant, i.e. a protective coating on the mucous membranes, which will prevent damage to the gum tissues. In my composition, the ingredient which appears to function as the mucoprotectant is sodium stearate USP.

Sodium stearate USP is actually a mixture of sodium stearate (oxtadeconoic acid, sodium salt) and sodium palmitate (hexodecanoic acid, sodium salt) wherein the sodium stearate content is at least 40% by weight. Both sodium stearate and sodium palmitate are water soluble and aqueous solutions of these salts are alkaline. Alcoholic solutions are neutral due to hydrolysis. Stearic acid and palmitic acid, in contrast, are not water soluble.

In my composition I use sodium stearate USP in a gelatinous carrier including water, glycerine, and a gelling agent. Thus a gelatinous mucoprotectant is formed which contains by weight: about 39% glycerine; about 55% water; about 1% sodium stearate USP; and about 5% gelling agent or binder. Additionally, I may use a small amount of fluoride such as sodium fluoride USP. The binder material is a cellulose type binder and although many may be suitable, the binders which have been experimentally verified are listed in tables 1 and 2.

The gelatinous mucoprotectant made in accordance with the above formula can be a stand-alone treatment for the teeth if the fluoride is included, however the fluoride does not enhance whitening the teeth. The whitening agent is an aqueous solution of hydrogen peroxide having an hydrogen peroxide concentration of between about 10% to 35% by weight. Separately the aqueous hydrogen peroxide solution and the gelatinous mucoprotectant can be stored in containers 11 and 12 of FIG. 3 for an indeterminate amount of time. Note, that hydrogen peroxide in this concentration cannot be introduced directly into the oral cavity without deleterious results.

Rather, the aqueous hydrogen peroxide solutions and the gelatinous mucoprotectant are combined in a dispensing container 13, shown in FIG. 1, at a ratio of about 1 part aqueous hydrogen peroxide solution to from about 2 to 5 or more parts gelatinous mucoprotectant. It may be seen that the hydrogen peroxide content will thus vary from about 2% by weight to about 15% by weight of the combination, with the concentration to be used to be selected by the dentist for each patient.

Although the exact modality is not clearly understood, when the combination in dispenser 13 is placed in a mouthpiece 14 and inserted in the mouth about the teeth 16 and adjacent gums 17, as shown in FIG. 2, a protective coating having an affinity for the mucous membranes underlying the membranes attaches to these membranes but does not attach to the teeth. This coating has a hydrophobic characteristic in that it does not permit the hydrogen peroxide to reach the gum tissue, thus no caustic effects of the hydrogen peroxide occur on these gingival tissues. It is believed that the addition of the acidic hydrogen peroxide to the gelatinous mucoprotectant form stearic acid and palmitic acid in situ. In this state they are readily deposited on the mucous membranes to block the hydrogen peroxide.

In actual practice, the dentist maintains a quantity of gelatinous mucoprotectant and aqueous hydrogen peroxide solution in bulk as in containers 11 and 12. When a patient desires a whitening treatment, the dentist mixes the mucoprotectant and hydrogen peroxide in the desired ratio in dispensing container 13 and makes a vacuformed mold 14 of the patient's teeth. When the mucoprotectant and the hydrogen peroxide are mixed, the resulting slurry 18 has a shelf-life of about three days, thus the patient is instructed to place the slurry in the mouthpiece 14 and position it over the teeth. The mouthpiece 14 with the slurry 18 may normally be retained in the mouth for as little as twenty minutes or as long as several hours without adverse effects.

It is also noteworthy to mention that hydrogen peroxide bleaching oftentimes increase the porosity of the tooth thus making the tooth somewhat more sensitive. This may be remedied to some extent by including fluoride in the gelatinous mucoprotectant as shown in the above tables so that the fluoride aids in remineralization of the tooth as the tooth is bleached. The mucoprotectant with the fluoride additive may also be used in the absence of the hydrogen peroxide solution as a fluoride treatment for the teeth. Thus, beneficial results may be obtained using my mucoprotectant gel with either a hydrogen peroxide bleaching solution or a fluoride remineralization solution. Of course, it may also be desirable to add a flavoring in small percentages, however such additives would not constitute a part of this invention.

While I have shown my invention in various forms, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various changes and modifications without departing from the spirit thereof.