Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening Price Duty Free

Snow is a leader on the house teeth whitening market. The exclusive whitening formula is actually commended for having the ability to eliminate also the hardest blemishes without creating sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 satisfied customersSuperior outcomes without causing sensitivityHelps get rid of difficult coffee and also red wine stains30-days refund guaranteeSnow brings in pearly whites bleaching beneficial without office gos to, awkward strips, or chaotic use.

The Snowfall procedure is actually an LED-activated pearly whites whitening system that targets all sort of discolorations. This consists of those triggered by red or white wine, herbal tea, coffee, as well as cigarette. The patent-pending light-accelerated modern technology causes no adverse effects, as the insights are actually not damaging. It is actually FDA-approved, enamel-safe, as well as doesn’t generate level of sensitivity. You do not need to have any sort of dentist check outs or prescriptions to perform the treatment coming from the comfort of your own house.

Kit Snow Teeth Whitening  Price Duty FreeKit Snow Teeth Whitening Price Duty Free

Snow likewise rejects to examine on animals. There are pair of sets to pick coming from. The components of each ought to last for over 90 uses. Let’s break down what they include and how to decide on the greatest one for you. This package is Snowfall’s best-known item, with the help of which they gained their recognition.

The All-in-One kKt coming from Snow has: a wired LED mouth piece,3 whitening wands,1 extra-strength whitening wand, anda cover quick guide. The mouth piece works along with the Snowfall application, thus you can handle exactly how strongly you want to lighten your teeth. Kit Snow Teeth Whitening Price Duty Free. It features a cord that permits you attach to USB, iPhones, and also other smart devices.

Kit Snow Teeth Whitening Price Duty Free

It might be noticeable, yet the most significant difference in between the 2 kits is the cordless functionality. Over three thousand were devoted on r & d, creating brand-new capabilities possible. The contents of The Wireless Charging Home Teeth Whitening Package feature: a cordless LED mouthpiece, a docking terminal,3 whitening wands,1 optimal toughness whitening wand,1 making less sensitive lotion, lip therapy, USB cable, andan instructions.

The last component enables the procedure to be actually changed to your demands. It programs automatically, thus all you possess to carry out is actually trigger it on the app. The mouth piece is actually water resistant. This indicates you can securely utilize it in the shower. What is actually even more, it cleans itself while billing. There is additionally a red-light therapy possibility for your gum tissues.

According to research, it helps: deal with micro-organisms, reduce pearly white sensitiveness, strengthen blood stream flow in the periodontals, protect against declining gum tissue lines, boost bone tissue quality, andminimize post-whitening inflammation. The docking station includes an unnoticeable style, patients often contrast the way it looks to a bluetooth sound speaker. Besides disinfecting as well as billing the mouth piece, it additionally functions as a penholder and also traveling instance for your product sticks.

Results are actually ensured to be actually noticeable after 7 days of make use of. The kits are actually very easy to use right out of package, so practically anybody may lighten their pearly whites with Snowfall items. Here is a basic outline: Safe forThose along with crowns, bridges, and veneersTeeth with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they transport their items worldwide, therefore your area won’t limit you.

Kit Snow Teeth Whitening Price Duty Free

It is suggested that you brush and also dental floss your teeth before doing the therapy. Dental health aids eliminate any food items debris and pollutants (Kit Snow Teeth Whitening Price Duty Free). This enables also coverage of the product. You want all surfaces of your teeth to become brightened!Moreover, cavity enducing plaque and micro-organisms, which often receive caught between the cream and also the pearly whites, create it more probable for you to experience dental caries or other dental problems.

This action is actually not needed to have if your teeth doesn’t usually react to temperature or pleasant or even tough meals. It not merely decreases sensitiveness however likewise boosts the pearly white polish. The formula is actually additionally packed along with minerals as well as vitamins. If you choose to utilize the numbing serum, perform this 15 minutes prior to the whitening treatment and after that rinse out.

Usage either the frequent or extra-strength whitening lotion, relying on the end results you really want. Spin the wand to obtain the product out. You could need to perform this up to 30 times when you first use it. The brush tip will definitely aid you administer the serum. Visualize you are actually painting a white picket fence (Kit Snow Teeth Whitening Price Duty Free).

If you obtain it on your periodontals rub it off the best you can. A tiny quantity will not hurt, however the product was actually designed for pearly whites merely. The cordless LED gadget possesses a “shake to wake” functionality. Listed here are the overall guidelines for this function: Shake when to transform it on.

Kit Snow Teeth Whitening Price Duty Free

A 3rd opportunity for the gum procedure. Shaking it 4 times will put it to sleep. You can easily likewise download and install the app to tailor your procedure. The moment you are actually carried out, put the illumination back right into the owner. If you have the wired mouthpiece instead, just attach it as much as your phone to trigger it.

Maintain it in for 9 to 30 mins per day, 21-30 days straight. If you happen to experience some sensitiveness, take a 1 to 3-day breather and also proceed the treatment later on. It’s ideal to administer your treatments just before going to mattress. By doing this they don’t disrupt eating or drinking.

The cordless kind is going to self-sanitize while billing. Outlet your whitening wands in the fridge after utilizing all of them. This may aid them keep their durability over a longer duration. The kits feature a source for months of applications, so it’s an excellent suggestion to take the greatest feasible care of your products.

The unit could be reviewed to a specialist procedure setting you back $five hundred-$ 1,000. For a considerably lower price you can possibly do this from the convenience of your personal home. You can get your Snow whitening package directly on their website, but it is actually also on call on Amazon. Listed here is an outline of just how much Snowfall whitening products presently price: ProductPriceAll-in-one set$ 199Wireless billing set$ 299Extra stamina refills$ 49Add-on for delicate pearly whites$ 25Serum refill sticks$ 25There are also remittance alternatives for those who do not wish to be out the loan simultaneously – Kit Snow Teeth Whitening Price Duty Free.

Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening  Price Duty FreeKit Snow Teeth Whitening Price Duty Free

This will definitely take place instantly and no bills will definitely be actually delivered, so you can merely appreciate your items. There is actually likewise a 30-day money-back assurance and also a 5-year service warranty on electronic devices. It’s legitimate after you trigger it on the Snow internet site. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 satisfied customersSuperior end results without resulting in sensitivityHelps get rid of challenging coffee and also a glass of wine stains30-days funds back promise Authorization Dental approves payment from third-party companies.

After seeing social networking sites flooded along with folks going crazy concerning just how remarkable the Snow Teeth Whitening unit is actually, I must figure out. One that combines all the most effective items of teeth whitening and also excludes all the negative ones? Yeah, certain (Kit Snow Teeth Whitening Price Duty Free). If you are actually a strong follower that anything too good to be accurate is exactly that, right here is actually a teeth whitening system to prove you incorrect.

Snow is actually additionally tremendously budget-friendly, at lower than 1/10th the cost of qualified whitening at the dentist. Likewise, Snowfall Pearly Whites Whitening performs not lead to level of sensitivity. You may have your ice lotion as well as consume it as well! Or is actually that covered? In any case, you can easily have each when your pearly whites may not be befalling coming from bangs of chemical treatments that white strips usually consist of.

Seriously,. The LED lighted mouth piece accelerates the whitening coming from the gel on your teeth leading to faster, longer long-term as well as much more reliable whitening without resulting in sensitiveness. The LED lighting permits you to utilize Snow for a much shorter time frame with the same whitening affects reviewed to other systems.

Kit Snow Teeth Whitening Price Duty Free

These are actually real, unsettled Snowfall consumers’ reviews/before as well as after teeth whitening images sent to our company within the final 30 times. These are actually true, unsettled Snow clients’ reviews/before and after teeth whitening images submitted to our team within the final 30 times. Fantastic product !! Only one that has actually worked for me! And also no level of sensitivity!! AMAZING!! Purchase this emotion quite skepitcal (Kit Snow Teeth Whitening Price Duty Free).

Kit Snow Teeth Whitening  Price Duty FreeKit Snow Teeth Whitening Price Duty Free

Passion it !!! Finest loan I have invested in a doubtful product. Ultimately one thing that really meets its own claims! I have actually been actually using this as well as would certainly highly recommend, I’ve viewed a variation after 4 times I enjoy this item! I have merely used it 3 times user-friendly and also no level of sensitivity…, I also neglected to utilize the after product for the periodontals the very first 2 times! …

It does precisely what they stated it will do, yes to everything!!!! I was actually pretty hesitant but I am actually extremely amazed after 2 usages today. “The greatest teeth whitening body for delicate teeth” “Take pearly whites whitening to the next confess an at-home package that matches a check out to your area pleasant dental practitioner.” “Pair of buddies talked about just how white my teeth appeared after using this package only 2 times!”.

When you purchase the Snow whitening unit, you obtain the adhering to in every set: Product sticks LED tray Shadow guide that assists you track your progress Directions on how to use the systemGetting began with Snowfall is effortless, and also the guide will walk you by means of whatever you need to know on exactly how to utilize the whitening system.

Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening  Price Duty FreeKit Snow Teeth Whitening Price Duty Free

It doesn’t measure up to several of its commitments, however it’s still an advantageous financial investment if you’re searching for whiter pearly whites, and also is better than many various other whitening products on the market. The Snowfall is actually reasonably uncomplicated to utilize. Comb your pearly whites prior to you begin. Apply the cream to your teeth very carefully, seeing to it you even the score insurance coverage.

After 10-30 moments, remove the rack and also rinse your pearly whites. Regular this method over the next days and weeks. This procedure corresponds to a few other whitening items. Yet the lotion and LED lightweight direct exposure produce it various than the majority of various other strips and racks. Yet various does not consistently suggest far better.

Pearly white were actually significantly whiter after simply a few times of use. And also along with extended make use of, there was actually impressive progress. Yellow pearly whites, although not powder snow white, were actually significantly whiter. It took a little bit longer than Snowfall guarantees, yet the body performs offer results reasonably swiftly.

Allow’s experience it. A few of the very most addicting beverages and behaviors are not the greatest for our brilliantly whites. Fortunately, if you wish white colored pearly whites, you do not have to bid farewell to coffee, soft drink, sweets, tea, red or white wine, and cigarette smoking considering that there are a lot of teeth whitening kits to select from (we still highly recommend that you kick the cigarette smoking routine for noticeable causes). Teeth whitening is a $ 3.2 billion around the world market.

Kit Snow Teeth Whitening Price Duty Free

Luckily, if you wish to conserve money, there are numerous effective packages that you can make use of in the home. There are essentially two sorts of sets: ones that bleach your teeth to take blemishes off and also ones that actually scuff off the discolorations. Turned on charcoal particles have actually ended up being quite popular recently.

Whitening holders as well as strips have actually been the requirement for decades as well as typically rely upon carbamide or hydrogen peroxide. There is actually a 3rd form of teeth whitening product that simply blasts your teeth with LED light. Having said that, pros talked to by the Wirecutter claim any kind of gains from this therapy are actually transient. Merely the SmileDirectClub device in our manual uses this technology, however it is actually used combined with a whitening gel.

Expecting or even nursing girls ought to certainly not utilize peroxide-based whitening products. It likewise isn’t suitable for youngsters under 14 years of ages. Kit Snow Teeth Whitening Price Duty Free. And also, you need to certainly not use peroxide for longer than pair of weeks of daily usage without the oversight of a dental practitioner. The FDA performs not highly recommend utilizing any type of whitening gels with a peroxide focus of greater than 18%.

You need to be actually cautious utilizing whitening products, as Buyer News explains. For example, if your discolored teeth are actually due to the natural thinning of pearly white polish that happens with getting older, whitening packages will certainly not assist you. Additionally, they may not bleach dental fillings, dentures, veneers, dental crowns, or limits. Specialists claim that whitening sets are secure when made use of as driven – Kit Snow Teeth Whitening Price Duty Free.

Kit Snow Teeth Whitening Price Duty Free

For that reason, about a week before you begin your whitening program, use a tooth paste specifically made for people with delicate teeth or even one that creates up polish. And, skip a day or more of making use of if you perform experience sensitiveness. The British Dental Journal has launched brand new investigation that claims there wants scientific proof to show the cosmetic and also health and wellness advantages of turned on charcoal toothpastes and grains, and also they may result in tooth decay.

Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening Price Duty Free

Snow is actually an innovator on the property teeth whitening market. The exclusive whitening formula is actually commended for being actually capable to remove even the most difficult blemishes without causing sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 satisfied customersSuperior outcomes without leading to sensitivityHelps clear away challenging coffee and also wine stains30-days loan back guaranteeSnow makes teeth bleaching practical without any office visits, annoying strips, or even messy treatment.

The Snow therapy is an LED-activated pearly whites whitening device that targets all kinds of discolorations. This includes those brought on by red or white wine, herbal tea, coffee, and also tobacco. The patent-pending light-accelerated technology causes no side effects, as the insights are actually not hazardous. It is FDA-approved, enamel-safe, and also doesn’t cause sensitivity. You don’t need any sort of dentist sees or even prescriptions to carry out the treatment coming from the comfort of your personal residence.

Kit Snow Teeth Whitening Price Duty FreeKit Snow Teeth Whitening Price Duty Free

Snow also rejects to check on animals. There are 2 kits to decide on. The components of each need to last for over 90 treatments. Let’s break what they consist of and also how to pick the most effective one for you. This set is Snow’s best-known item, because of which they got their attraction.

The All-in-One kKt from Snow includes: a wired LED mouthpiece,3 whitening wands,1 extra-strength whitening wand, anda cover resource. The mouthpiece is actually suitable with the Snow app, thus you can easily handle how deeply you desire to bleach your teeth. Kit Snow Teeth Whitening Price Duty Free. It features a cord that lets you link to USB, apples iphone, and also other mobile phones.

Kit Snow Teeth Whitening Price Duty Free

It might be evident, but the greatest difference in between both sets is the cordless functionality. Over three thousand were actually invested on r & d, creating new capabilities possible. The components of The Wireless Charging Home Teeth Whitening Package include: a cordless LED mouth piece, a docking station,3 whitening sticks,1 maximum stamina whitening wand,1 numbing product, lip therapy, USB cable television, andan user’s manual.

The last feature enables the therapy to become readjusted to your needs. It plans instantly, therefore all you need to do is activate it on the app. The mouth piece is actually water resistant. This indicates you can properly utilize it in the downpour. What’s additional, it cleans on its own while charging. There is actually likewise a red-light procedure possibility for your gums.

Depending on to research study, it aids: eliminate microorganisms, reduce tooth sensitivity, enhance blood stream flow in the gums, stop declining gum tissue lines, rise bone thickness, andminimize post-whitening inflammation. The docking station includes an inconspicuous concept, clients frequently match up the method it wants to a bluetooth audio speaker. Besides cleaning and also charging the mouth piece, it likewise functions as a penholder and travel instance for your serum sticks.

Impacts are actually ensured to become noticeable after 7 days of making use of. The packages are actually simple to use best out of the package, thus basically anyone can whiten their pearly whites along with Snow items. Listed here is a general review: Safe forThose along with crowns, links, as well as veneersTeeth along with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they deliver their products worldwide, so your location won’t limit you.

Kit Snow Teeth Whitening Price Duty Free

It is actually suggested that you comb and also use floss your pearly whites prior to carrying out the procedure. Oral hygiene aids get rid of any kind of food items clutter as well as contaminations (Kit Snow Teeth Whitening Price Duty Free). This permits even insurance coverage of the item. You prefer all surfaces of your pearly whites to be actually brightened!Moreover, plaque and also micro-organisms, which in some cases acquire entraped between the product and the pearly whites, produce it very likely for you to experience dental caries or even other oral issues.

This action is actually certainly not needed to have if your teeth does not commonly respond to temperature level or even pleasant or even difficult meals. It certainly not merely lowers sensitiveness yet additionally strengthens the pearly white enamel. The formula is additionally loaded with minerals as well as vitamins. If you make a decision to utilize the anesthetizing lotion, perform this 15 moments before the whitening treatment and after that rinse out.

Use either the normal or even extra-strength whitening serum, relying on the end results you wish. Twist the stick to receive the item out. You may must perform this as much as 30 opportunities when you initially use it. The comb idea are going to help you use the cream. Visualize you are painting a white colored picket fence (Kit Snow Teeth Whitening Price Duty Free).

If you love your gums clean it off the very best you can. A little quantity will not harm, however the item was actually made for pearly whites merely. The cordless LED device possesses a “shake to wake up” function. Here are actually the general guidelines for this attribute: Shake when to transform it on.

Kit Snow Teeth Whitening Price Duty Free

A third opportunity for the gum therapy. Trembling it four times are going to place it to rest. You may additionally download and install the application to customize your procedure. The moment you are actually carried out, put the light back right into the owner. If you have the wired mouthpiece instead, just connect it approximately your phone to activate it.

Keep it in for 9 to thirty minutes on a daily basis, 21-30 days in a row. If you happen to experience some level of sensitivity, take a 1 to 3-day breather and also proceed the therapy later. It is actually finest to administer your treatments prior to going to bed. In this manner they don’t hinder consuming or consuming.

The wireless kind will self-sanitize while charging. Store your whitening sticks in the refrigerator after using all of them. This may aid them keep their strength over a longer time frame. The sets include a supply for months of requests, so it’s a great idea to take the most ideal feasible care of your products.

The system can easily be actually matched up to a professional procedure setting you back $five hundred-$ 1,000. For a considerably lower rate you can possibly do this coming from the convenience of your very own house. You can easily order your Snowfall whitening package directly on their site, however it is actually likewise readily available on Amazon. Right here is an outline of just how much Snow whitening items presently cost: ProductPriceAll-in-one package$ 199Wireless charging kit$ 299Extra strength refills$ 49Add-on for vulnerable teeth$ 25Serum refill sticks$ 25There are actually even payment possibilities for those who do not would like to be out the cash all at as soon as – Kit Snow Teeth Whitening Price Duty Free.

Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening Price Duty FreeKit Snow Teeth Whitening Price Duty Free

This will definitely happen automatically and no bills will definitely be actually sent out, so you can only appreciate your items. There is also a 30-day money-back guarantee and a 5-year manufacturer’s warranty on electronics. It holds after you trigger it on the Snowfall web site. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 happy customersSuperior outcomes without causing sensitivityHelps eliminate difficult coffee and also white wine stains30-days cash back promise Authorization Dental approves compensation from third-party companies.

After observing social networking sites swamped along with folks going crazy concerning exactly how fantastic the Snowfall Pearly white Whitening unit is, I needed to determine. One that combines all the greatest items of teeth whitening and also neglects all the negative ones? Yeah, certain (Kit Snow Teeth Whitening Price Duty Free). If you are a powerful follower that anything also excellent to become accurate is actually exactly that, listed here is actually a teeth whitening body to confirm you inappropriate.

Snow is also incredibly inexpensive, at less than 1/10th the price of qualified whitening at the dental professional. Also, Snow Teeth Whitening does certainly not lead to sensitiveness. You can easily have your ice lotion and eat it also! Or even is actually that pie? In any case, you can easily possess both when your pearly whites aren’t befalling coming from bursts of chemical therapies that white strips typically contain.

Honestly,. The LED lighted mouth piece increases the whitening coming from the gel on your pearly whites resulting in quicker, longer long-term and even more efficient whitening without triggering sensitivity. The LED lighting enables you to utilize Snowfall for a shorter time period along with the very same whitening impacts reviewed to other bodies.

Kit Snow Teeth Whitening Price Duty Free

These are actual, unpaid Snow customers’ reviews/before and also after teeth whitening photos undergone our team within the final 1 month. These are true, unsettled Snow customers’ reviews/before as well as after teeth whitening images undergone our team within the last 1 month. Spectacular product !! A single that has actually worked with me! And no sensitiveness!! AMAZING!! Purchase this feeling incredibly skepitcal (Kit Snow Teeth Whitening Price Duty Free).

Kit Snow Teeth Whitening Price Duty FreeKit Snow Teeth Whitening Price Duty Free

Affection it !!! Greatest funds I have actually invested on a doubtful product. Lastly one thing that actually measures up to its cases! I have been utilizing this as well as will recommend, I have actually seen a distinction after 4 days I love this product! I have actually just utilized it 3 times simple to use as well as no sensitivity…, I even failed to remember to make use of the after product for the gum tissues the 1st 2 times! …

It carries out precisely what they said it would carry out, yes to whatever!!!! I was actually fairly unconvinced however I’m incredibly impressed after 2 uses today. “The very best teeth whitening body for sensitive pearly whites” “Take teeth whitening to the next confess an at-home set that measures up to a check out to your area helpful dentist.” “2 buddies talked about how white my teeth took care of utilizing this kit just pair of times!”.

When you order the Snow whitening device, you obtain the observing in every kit: Lotion sticks LED rack Shadow manual that assists you track your progression Directions on exactly how to use the systemGetting started with Snowfall is actually easy, and also the overview will walk you through whatever you need to have to recognize on just how to utilize the whitening body.

Kit Snow Teeth Whitening Price Duty Free

Kit Snow Teeth Whitening Price Duty FreeKit Snow Teeth Whitening Price Duty Free

It doesn’t reside up to a number of its assurances, yet it’s still a rewarding expenditure if you are actually appearing for whiter teeth, and is actually far better than a lot of other whitening products around. The Snowfall is actually fairly simple to utilize. Comb your pearly whites before you begin. Use the lotion to your teeth very carefully, being sure you get back at coverage.

After 10-30 mins, eliminate the rack and also rinse off your teeth. Replay this procedure over the upcoming days and weeks. This process resembles some other whitening products. Yet the product and LED light exposure produce it different than most various other bits as well as holders. Yet different does not always suggest much better.

Pearly white were visibly whiter after a few times of utilization. And also with extended use, there was remarkable improvement. Yellow pearly whites, although not snowfall white, were actually significantly whiter. It took a bit longer than Snowfall vows, but the system performs deliver results rather quickly.

Permit’s face it. Some of the most habit forming beverages and also routines are actually not the greatest for our pearly whites. Luckily, if you really want white colored pearly whites, you do not possess to leave to coffee, soft drink, sugary foods, tea, red or white wine, and also cigarette smoking considering that there are actually many teeth whitening kits to pick from (our experts still advise that you kick the smoking cigarettes habit for apparent reasons). Pearly white whitening is actually a $ 3.2 billion all over the world market.

Kit Snow Teeth Whitening Price Duty Free

Thankfully, if you intend to spare money, there are many effective packages that you may use in your home. There are basically two sorts of packages: ones that bleach your pearly whites to take spots off and also ones that actually scrape off the blemishes. Triggered charcoal powders have become quite popular in current years.

Whitening racks and also bits have been the requirement for decades and usually rely on carbamide or hydrogen peroxide. There is a third form of teeth whitening item that simply blasts your pearly whites along with LED lighting. Nonetheless, experts questioned due to the Wirecutter claim any increases coming from this therapy are actually short-term. Only the SmileDirectClub device in our overview uses this modern technology, yet it is utilized along with a whitening gel.

Pregnant or even nursing women ought to not use peroxide-based whitening products. It also isn’t suited for little ones under 14 years aged. Kit Snow Teeth Whitening Price Duty Free. As well as, you should certainly not utilize peroxide for longer than two weeks of day-to-day use without the supervision of a dental expert. The FDA performs certainly not encourage using any type of whitening gels along with a peroxide attention of more than 18%.

You need to become careful using whitening items, as Individual Information reveals. For example, if your discolored teeth are as a result of to the organic thinning of tooth polish that happens along with aging, whitening sets are going to certainly not help you. Also, they can easily not whiten fillings, false teeths, laminates, crowns, or hats. Specialists mention that whitening kits are actually risk-free when made use of as pointed – Kit Snow Teeth Whitening Price Duty Free.

Kit Snow Teeth Whitening Price Duty Free

As a result, regarding a full week prior to you begin your whitening routine, use a toothpaste specifically developed for folks with sensitive teeth or even one that accumulates polish. And, miss a time or 2 of make use of if you perform experience sensitiveness. The English Dental Journal has actually launched new research study that points out there wants clinical documentation to show the cosmetic and health benefits of triggered charcoal toothpastes and particles, and also they might trigger tooth decay.