Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking 2022

Snow is a leader on the residence pearly whites whitening market. The proprietary whitening formula is commended for having the capacity to eliminate even the hardest spots without causing sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 happy customersSuperior results without resulting in sensitivityHelps get rid of challenging coffee and also red or white wine stains30-days refund guaranteeSnow makes teeth bleaching handy without office sees, unpleasant strips, or chaotic use.

The Snowfall procedure is actually an LED-activated teeth whitening body that targets all kinds of spots. This features those created by white wine, herbal tea, coffee, and cigarette. The patent-pending light-accelerated modern technology causes no negative effects, as the insights are actually not damaging. It is actually FDA-approved, enamel-safe, and does not generate sensitiveness. You do not require any kind of dental professional check outs or prescribeds to accomplish the therapy coming from the convenience of your very own residence.

Snow Teeth Whitening Coupon Stacking  2022Snow Teeth Whitening Coupon Stacking 2022

Snow also refuses to assess on pets. There are two packages to pick from. The contents of each need to last for over 90 treatments. Permit’s malfunction what they consist of and also how to choose the most effective one for you. This set is actually Snow’s best-known product, with the help of which they got their appeal.

The All-in-One kKt from Snowfall consists of: a wired LED mouth piece,3 whitening wands,1 extra-strength whitening wand, anda shade overview. The mouthpiece works along with the Snow app, so you may manage how deeply you desire to lighten your pearly whites. Snow Teeth Whitening Coupon Stacking 2022. It possesses a wire that lets you connect to USB, apples iphone, and also other cell phones.

Snow Teeth Whitening Coupon Stacking 2022

It might be actually noticeable, however the most significant variation in between the 2 packages is the wireless function. Over 3 million were actually devoted on r & d, creating new capabilities achievable. The materials of The Wireless Charging At-home Pearly Whites Whitening Kit consist of: a cordless LED mouthpiece, a docking terminal,3 whitening sticks,1 maximum stamina whitening wand,1 anesthetizing product, lip treatment, USB cable, andan instructions.

The final feature enables the treatment to become adapted to your needs. It courses instantly, therefore all you need to do is trigger it on the app. The mouthpiece is actually water-proof. This implies you can safely utilize it in the downpour. What’s additional, it sanitizes on its own while demanding. There is also a red-light procedure possibility for your periodontals.

According to analysis, it assists: do away with microorganisms, minimize tooth sensitivity, enhance blood flow in the gums, avoid declining periodontal lines, boost bone thickness, andminimize post-whitening inflammation. The docking terminal includes a low-profile style, clients typically contrast the technique it aims to a bluetooth audio speaker. Besides disinfecting and billing the mouthpiece, it likewise increases as a penholder as well as trip case for your cream wands.

Effects are actually guaranteed to be visible after 7 days of utilization. The sets are effortless to utilize correct away from package, thus almost any individual may whiten their teeth along with Snow items. Below is actually a basic overview: Safe forThose along with crowns, bridges, as well as veneersTeeth with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they ship their products worldwide, so your location won’t restrict you.

Snow Teeth Whitening Coupon Stacking 2022

It is actually suggested that you brush and also use floss your pearly whites prior to doing the therapy. Oral health aids eliminate any sort of food fragments and contaminations (Snow Teeth Whitening Coupon Stacking 2022). This allows also coverage of the product. You prefer all surface areas of your teeth to be brightened!Moreover, cavity enducing plaque and bacteria, which sometimes receive entraped in between the serum as well as the pearly whites, make it even more likely for you to experience dental caries or various other oral problems.

This step is actually certainly not needed to have if your dentition does not generally respond to temperature level or pleasant or challenging foods items. It certainly not simply lowers sensitivity yet also reinforces the tooth polish. The formula is actually also full of minerals as well as vitamins. If you make a decision to use the anesthetizing cream, do this 15 moments before the whitening treatment as well as then rinse out.

Usage either the routine or extra-strength whitening serum, depending upon the end results you desire. Twist the wand to receive the item out. You could must perform this approximately 30 opportunities when you initially use it. The comb pointer will definitely aid you apply the product. Imagine you are painting a white picket fencing (Snow Teeth Whitening Coupon Stacking 2022).

If you get it on your periodontals wipe it off the most effective you can. A percentage will not harm, however the product was created for teeth simply. The wireless LED device possesses a “shake to wake” functionality. Here are actually the basic guidelines for this function: Shake as soon as to turn it on.

Snow Teeth Whitening Coupon Stacking 2022

A third time for the gum tissue procedure. Shaking it four opportunities will put it to sleep. You may likewise download and install the application to customize your procedure. When you are carried out, place the light back right into the owner. If you have actually the wired mouth piece instead, merely connect it approximately your phone to activate it.

Maintain it in for 9 to half an hour on a daily basis, 21-30 times in a row. If you happen to experience some sensitiveness, take a 1 to 3-day breather and carry on the treatment eventually. It’s best to conduct your sessions prior to going to bedroom. By doing this they do not obstruct eating or alcohol consumption.

The cordless kind is going to self-sanitize while charging. Store your whitening wands in the refrigerator after using them. This may assist them maintain their strength over a longer duration. The sets include a supply for months of treatments, so it is actually a good idea to take the greatest possible care of your items.

The system may be compared to a specialist procedure setting you back $five hundred-$ 1,000. For a much lower cost you can possibly do this from the comfort of your very own property. You can easily purchase your Snowfall whitening kit right on their web site, but it is actually additionally on call on Amazon. Here is an overview of just how a lot Snowfall whitening items currently cost: ProductPriceAll-in-one package$ 199Wireless billing package$ 299Extra durability refills$ 49Add-on for vulnerable teeth$ 25Serum refill sticks$ 25There are even payment choices for those who do not would like to be out the cash at one time – Snow Teeth Whitening Coupon Stacking 2022.

Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking  2022Snow Teeth Whitening Coupon Stacking 2022

This will definitely happen automatically and no costs will certainly be actually delivered, so you can merely enjoy your products. There is also a 30-day money-back assurance as well as a 5-year service warranty on electronics. It stands after you activate it on the Snow web site. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 delighted customersSuperior end results without triggering sensitivityHelps take out hard coffee as well as red or white wine stains30-days cash back assure Authorization Dental takes payment from 3rd party firms.

After finding social networks flooded with folks raving regarding exactly how excellent the Snowfall Pearly white Whitening body is actually, I possessed to discover out. One that blends all the most ideal items of pearly whites whitening as well as omits all the negative ones? Yeah, certain (Snow Teeth Whitening Coupon Stacking 2022). If you are a sturdy believer that just about anything too excellent to be actually real is actually specifically that, right here is actually a pearly whites whitening device to show you wrong.

Snowfall is actually also incredibly budget-friendly, at much less than 1/10th the rate of professional whitening at the dental professional. Also, Snow Pearly Whites Whitening does not cause level of sensitivity. You may have your ice lotion and eat it as well! Or even is that cake? In any case, you can easily have both when your pearly whites may not be befalling from blasts of chemical treatments that white colored bits often have.

Truthfully,. The LED ignited mouth piece speeds up the whitening from the gel on your pearly whites causing faster, a lot longer long-term and more effective whitening without inducing sensitiveness. The LED light allows you to utilize Snow for a briefer period of time with the same whitening impacts reviewed to other bodies.

Snow Teeth Whitening Coupon Stacking 2022

These are real, unsettled Snowfall customers’ reviews/before as well as after teeth whitening images accepted us within the final 1 month. These are real, unsettled Snowfall consumers’ reviews/before and also after pearly whites whitening photographes sent to our team within the last 1 month. Awesome product !! Just one that has actually operated for me! And also no sensitiveness!! AMAZING!! Procured this sensation really skepitcal (Snow Teeth Whitening Coupon Stacking 2022).

Snow Teeth Whitening Coupon Stacking  2022Snow Teeth Whitening Coupon Stacking 2022

Affection it !!! Ideal cash I have actually invested on a doubtful product. Finally something that truly measures up to its cases! I have actually been utilizing this and also would certainly recommend, I’ve observed a variation after 4 days I love this item! I have actually simply utilized it 3 times easy to make use of and no level of sensitivity…, I even forgot to make use of the after product for the periodontals the initial 2 opportunities! …

It performs exactly what they stated it would certainly perform, yes to whatever!!!! I was rather doubtful however I’m extremely impressed after 2 usages today. “The very best pearly whites whitening system for sensitive teeth” “Take pearly whites whitening to the upcoming confess an at-home kit that measures up to a visit to your area friendly dental professional.” “2 buddies commented on just how white my pearly whites appeared after using this package simply 2 times!”.

When you order the Snowfall whitening body, you get the observing in every set: Product sticks LED holder Shadow resource that assists you track your progression Directions on just how to utilize the systemGetting began along with Snowfall is effortless, as well as the overview will walk you via whatever you need to know on how to use the whitening body.

Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking  2022Snow Teeth Whitening Coupon Stacking 2022

It does not live up to several of its own pledges, yet it is actually still a beneficial expenditure if you’re seeking whiter pearly whites, as well as is much better than the majority of various other whitening items on the market. The Snow is pretty uncomplicated to use. Comb your teeth just before you start. Administer the cream to your teeth meticulously, being sure you obtain also insurance coverage.

After 10-30 moments, eliminate the rack and rinse your pearly whites. Loyal this procedure over the following times as well as weeks. This procedure resembles some various other whitening products. However the serum as well as LED lightweight direct exposure make it different than a lot of other bits and holders. But different does not consistently suggest far better.

Teeth were visibly whiter after just a couple of times of making use of. And also with expanded usage, there was actually dramatic progression. Yellow teeth, although not snow white colored, were actually noticeably whiter. It took a bit longer than Snow assures, but the unit performs provide results relatively promptly.

Let’s face it. A few of one of the most addicting drinks and also practices are actually certainly not the very best for our teeths. The good news is, if you wish white pearly whites, you do not possess to leave to coffee, soda, sweets, tea, red wine, and cigarette smoking given that there are a lot of pearly whites whitening sets to decide on (our experts still suggest that you stop the cigarette smoking practice for noticeable reasons). Teeth whitening is actually a $ 3.2 billion around the world industry.

Snow Teeth Whitening Coupon Stacking 2022

Thankfully, if you wish to save funds, there are several helpful sets that you can easily use in the house. There are essentially two kinds of kits: ones that bleach your teeth to take blemishes off as well as ones that literally remove the blemishes. Triggered charcoal particles have actually come to be very prominent recently.

Whitening racks and also bits have been actually the specification for many years as well as typically depend on carbamide or hydrogen peroxide. There is a 3rd kind of teeth whitening item that just blasts your pearly whites with LED light. Having said that, experts interviewed due to the Wirecutter state any type of gains coming from this therapy are temporary. Merely the SmileDirectClub unit in our overview utilizes this innovation, however it is actually used together with a whitening gel.

Expecting or even nursing ladies need to not use peroxide-based whitening items. It additionally isn’t appropriate for kids under 14 years aged. Snow Teeth Whitening Coupon Stacking 2022. And also, you need to not use peroxide for longer than two weeks of day-to-day make use of without the oversight of a dental professional. The FDA performs not recommend making use of any type of whitening gels along with a peroxide attention of greater than 18%.

You need to be actually careful using whitening products, as Individual News describes. For example, if your discolored pearly whites result from the all-natural decreasing of tooth polish that possesses getting older, whitening packages will certainly certainly not help you. Also, they may certainly not lighten dental fillings, false teeths, veneers, crowns, or even caps. Professionals claim that whitening kits are risk-free when utilized as routed – Snow Teeth Whitening Coupon Stacking 2022.

Snow Teeth Whitening Coupon Stacking 2022

Consequently, regarding a week prior to you start your whitening regimen, use a toothpaste particularly created for individuals along with delicate teeth or one that accumulates enamel. And also, avoid a time or two of utilization if you perform experience sensitivity. The English Dental Journal has actually released brand-new analysis that claims there is actually insufficient medical documentation to prove the cosmetic as well as health perks of triggered charcoal toothpastes as well as powders, as well as that they may create tooth decay.

Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking 2022

Snow is a leader on the home teeth whitening market. The exclusive whitening formula is actually praised for managing to eliminate even the hardest spots without triggering sensitiveness. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 happy customersSuperior end results without causing sensitivityHelps clear away tough coffee as well as red or white wine stains30-days cash back guaranteeSnow brings in teeth lightening practical with no workplace gos to, uneasy bits, or messy treatment.

The Snow therapy is actually an LED-activated teeth whitening device that targets all sort of spots. This includes those induced by white wine, herbal tea, coffee, and also tobacco. The patent-pending light-accelerated innovation triggers no side effects, as the wavelengths are not hazardous. It is FDA-approved, enamel-safe, and doesn’t generate sensitiveness. You do not require any dental professional gos to or even prescribeds to carry out the treatment coming from the convenience of your very own house.

Snow Teeth Whitening Coupon Stacking 2022Snow Teeth Whitening Coupon Stacking 2022

Snowfall additionally rejects to check on creatures. There are two kits to decide on. The contents of each ought to last for over 90 requests. Permit’s malfunction what they consist of and also how to decide on the most effective one for you. This package is Snow’s best-known product, because of which they acquired their attraction.

The All-in-One kKt from Snowfall contains: a wired LED mouthpiece,3 whitening wands,1 extra-strength whitening stick, anda shade guide. The mouth piece is actually suitable with the Snowfall app, thus you may handle just how strongly you intend to whiten your teeth. Snow Teeth Whitening Coupon Stacking 2022. It features a wire that lets you link to USB, iPhones, as well as other mobile phones.

Snow Teeth Whitening Coupon Stacking 2022

It may be obvious, yet the greatest variation in between both sets is actually the cordless function. Over three million were invested on r & d, bring in brand new functions feasible. The materials of The Wireless Charging At-home Pearly Whites Whitening Set consist of: a wireless LED mouthpiece, a docking station,3 whitening wands,1 maximum stamina whitening stick,1 desensitizing cream, lip treatment, USB cord, andan guideline guide.

The final attribute permits the treatment to be actually adapted to your needs. It programs instantly, thus all you must do is actually activate it on the app. The mouthpiece is actually water-resistant. This indicates you may securely utilize it in the shower. What is actually additional, it sanitizes itself while billing. There is additionally a red-light treatment choice for your gum tissues.

According to research, it helps: do away with germs, lower tooth sensitivity, improve blood circulation in the gum tissues, avoid receding periodontal lines, rise bone thickness, andminimize post-whitening inflammation. The docking terminal includes a low-profile style, people typically match up the method it aims to a bluetooth audio speaker. Besides disinfecting and also billing the mouthpiece, it likewise increases as a penholder and also traveling instance for your lotion wands.

Results are actually ensured to become visible after 7 days of utilization. The sets are actually user-friendly correct away from the container, so practically any individual may whiten their teeth along with Snow items. Listed below is actually a standard overview: Safe forThose with crowns, links, and also veneersTeeth along with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they ship their items worldwide, so your place will not confine you.

Snow Teeth Whitening Coupon Stacking 2022

It is recommended that you comb and floss your teeth just before carrying out the therapy. Oral cleanliness helps get rid of any type of food items fragments and pollutants (Snow Teeth Whitening Coupon Stacking 2022). This permits even coverage of the product. You yearn for all surfaces of your pearly whites to be brightened!Moreover, plaque and also bacteria, which sometimes get entraped in between the serum as well as the teeth, make it most likely for you to experience dental cavity or various other oral concerns.

This action is not needed to have if your dentition does not normally react to temp or sweet or even difficult foods. It not merely reduces level of sensitivity however additionally enhances the tooth enamel. The formula is in addition full of minerals and vitamins. If you make a decision to make use of the making less sensitive cream, do this 15 moments prior to the whitening session and afterwards rinse.

Make use of either the routine or even extra-strength whitening cream, relying on the end results you want. Twist the wand to receive the item out. You may must perform this around 30 opportunities when you initially utilize it. The comb suggestion will definitely aid you administer the serum. Visualize you are repainting a white colored picket fencing (Snow Teeth Whitening Coupon Stacking 2022).

If you receive it on your gum tissues rub it off the most ideal you can. A tiny volume won’t injure, however the product was made for pearly whites merely. The wireless LED unit has a “shake to wake” feature. Listed below are actually the general directions for this feature: Shake the moment to switch it on.

Snow Teeth Whitening Coupon Stacking 2022

A 3rd opportunity for the gum tissue procedure. Shaking it 4 opportunities will certainly put it to sleep. You can easily also download and install the app to tailor your therapy. Once you are done, position the lighting back in to the holder. If you have actually the wired mouthpiece as an alternative, simply connect it as much as your phone to trigger it.

Maintain it in for 9 to thirty minutes daily, 21-30 days in a row. If you happen to experience some sensitivity, take a 1 to 3-day break and also carry on the procedure eventually. It’s absolute best to perform your treatments before going to bed. In this manner they don’t disrupt eating or even consuming.

The cordless kind is going to self-sanitize while demanding. Shop your whitening sticks in the fridge after utilizing them. This can aid all of them keep their strength over a longer time frame. The sets consist of a source for months of requests, so it is actually a really good tip to take the greatest achievable treatment of your products.

The device may be compared to a specialist therapy costing $500-$ 1,000. For a much lower price you may do this coming from the convenience of your personal home. You may get your Snowfall whitening set right on their website, however it’s likewise available on Amazon. Listed below is actually a summary of the amount of Snowfall whitening items presently cost: ProductPriceAll-in-one package$ 199Wireless billing kit$ 299Extra strength refills$ 49Add-on for delicate teeth$ 25Serum refill sticks$ 25There are actually even repayment alternatives for those that don’t wish to be out the cash at one time – Snow Teeth Whitening Coupon Stacking 2022.

Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking 2022Snow Teeth Whitening Coupon Stacking 2022

This are going to occur automatically and also no costs will certainly be actually delivered, so you can easily simply appreciate your products. There is actually additionally a 30-day money-back promise as well as a 5-year guarantee on electronics. It holds after you trigger it on the Snow website. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 happy customersSuperior end results without causing sensitivityHelps eliminate difficult coffee and red or white wine stains30-days loan back promise Authorization Dental approves compensation from third-party companies.

After viewing social networking sites flooded along with people raving about how amazing the Snowfall Teeth Whitening unit is, I possessed to determine. One that mixes all the greatest parts of teeth whitening and also excludes all the negative ones? Yeah, sure (Snow Teeth Whitening Coupon Stacking 2022). If you are actually a strong follower that anything as well excellent to be correct is exactly that, listed here is actually a pearly whites whitening body to verify you wrong.

Snow is additionally tremendously economical, at lower than 1/10th the rate of professional whitening at the dental practitioner. Additionally, Snowfall Pearly Whites Whitening does not create level of sensitivity. You can have your ice lotion and also eat it also! Or is that birthday cake? Either means, you can possess each when your teeth aren’t befalling coming from blasts of chemical treatments that white bits usually contain.

Truthfully,. The LED ignited mouth piece accelerates the whitening coming from the gel on your pearly whites causing quicker, much longer enduring and extra dependable whitening without leading to sensitiveness. The LED lighting enables you to make use of Snow for a briefer time frame with the very same whitening affects contrasted to various other bodies.

Snow Teeth Whitening Coupon Stacking 2022

These are genuine, unsettled Snowfall customers’ reviews/before as well as after teeth whitening photos accepted us within the final thirty days. These are genuine, unpaid Snowfall consumers’ reviews/before and after pearly whites whitening pictures undergone our company within the final thirty days. Incredible item !! A single that has functioned for me! And also no level of sensitivity!! AMAZING!! Bought this emotion really skepitcal (Snow Teeth Whitening Coupon Stacking 2022).

Snow Teeth Whitening Coupon Stacking 2022Snow Teeth Whitening Coupon Stacking 2022

Affection it !!! Greatest loan I have actually invested in an undecided product. Ultimately one thing that truly resides up to its own cases! I have been using this and would certainly advise, I’ve found a distinction after 4 times I love this product! I have actually merely utilized it 3 times easy to use and also no sensitiveness…, I also failed to remember to utilize the after product for the gums the very first 2 times! …

It does specifically what they stated it would certainly perform, yes to everything!!!! I was actually pretty doubtful but I am actually quite impressed after 2 make uses of today. “The best teeth whitening system for delicate pearly whites” “Take teeth whitening to the next degree with an at-home set that equals a see to your community friendly dental expert.” “Two buddies talked about how white colored my teeth cared for using this kit merely pair of opportunities!”.

When you get the Snowfall whitening body, you acquire the complying with in every package: Cream sticks LED tray Shadow resource that aids you track your progression Guidelines on how to make use of the systemGetting began along with Snowfall is quick and easy, as well as the guide is going to walk you by means of every little thing you require to recognize on just how to utilize the whitening system.

Snow Teeth Whitening Coupon Stacking 2022

Snow Teeth Whitening Coupon Stacking 2022Snow Teeth Whitening Coupon Stacking 2022

It doesn’t measure up to a number of its own commitments, but it’s still a rewarding expenditure if you’re looking for whiter teeth, and also is actually better than a lot of other whitening products on the market. The Snow is actually pretty straightforward to make use of. Comb your pearly whites just before you begin. Use the cream to your pearly whites carefully, helping make sure you get back at insurance coverage.

After 10-30 mins, take out the rack and also rinse your pearly whites. Regular this process over the next times and full weeks. This method corresponds to some other whitening items. However the lotion as well as LED lightweight visibility make it different than the majority of other strips and also trays. But various doesn’t constantly mean much better.

Pearly white were noticeably whiter after just a couple of times of use. And with extended usage, there was significant progression. Yellow pearly whites, although certainly not snowfall white, were actually significantly whiter. It took a little longer than Snow assures, but the unit performs give results reasonably rapidly.

Allow’s encounter it. A number of one of the most addicting beverages as well as behaviors are actually certainly not the greatest for our teeths. Thankfully, if you yearn for white colored pearly whites, you don’t must leave to coffee, soft drink, desserts, herbal tea, wine, and smoking cigarettes considering that there are lots of pearly whites whitening kits to choose coming from (our experts still recommend that you kick the smoking cigarettes habit for apparent explanations). Teeth whitening is a $ 3.2 billion globally field.

Snow Teeth Whitening Coupon Stacking 2022

Fortunately, if you wish to spare loan, there are many efficient packages that you may use in the house. There are actually essentially two sorts of sets: ones that bleach your pearly whites to take spots off as well as ones that literally scrape off the discolorations. Activated charcoal grains have become rather prominent in recent times.

Whitening trays and also bits have been actually the requirement for years and typically count on carbamide or even hydrogen peroxide. There is actually a 3rd kind of teeth whitening product that simply blasts your teeth with LED lighting. Having said that, pros talked to due to the Wirecutter say any gains coming from this treatment are actually short-lived. Simply the SmileDirectClub device in our resource uses this technology, yet it is actually utilized along with a whitening gel.

Pregnant or nursing females must certainly not use peroxide-based whitening products. It also isn’t suitable for children under 14 years old. Snow Teeth Whitening Coupon Stacking 2022. As well as, you should not use peroxide for longer than pair of full weeks of everyday make use of without the supervision of a dental expert. The FDA carries out certainly not recommend utilizing any whitening gels along with a peroxide attention of more than 18%.

You require to be actually careful utilizing whitening items, as Consumer News details. As an example, if your discolored pearly whites are because of the organic thinning of pearly white enamel that comes with aging, whitening kits are going to certainly not aid you. Likewise, they can easily not lighten fillings, dentures, veneers, crowns, or limits. Experts mention that whitening kits are actually secure when made use of as directed – Snow Teeth Whitening Coupon Stacking 2022.

Snow Teeth Whitening Coupon Stacking 2022

As a result, regarding a full week prior to you begin your whitening routine, make use of a tooth paste primarily made for people with sensitive teeth or one that creates up polish. And also, miss a time or two of making use of if you do experience sensitivity. The British Dental Journal has actually released brand-new investigation that says there wants scientific proof to verify the cosmetic as well as wellness benefits of switched on charcoal toothpastes and also grains, and also they may induce tooth decay.