Save On Snow Teeth Whitening Voucher 2020

Save On Snow Teeth Whitening Voucher 2020

Snowfall is actually a forerunner on the residence teeth whitening market. The exclusive whitening formula is commended for having the ability to get rid of even the toughest stains without inducing level of sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 satisfied customersSuperior outcomes without resulting in sensitivityHelps remove tough coffee and red wine stains30-days refund guaranteeSnow brings in teeth whitening practical without any workplace brows through, uncomfortable bits, or cluttered request.

The Snowfall procedure is an LED-activated pearly whites whitening device that targets all sort of spots. This includes those triggered by wine, herbal tea, coffee, and also tobacco. The patent-pending light-accelerated modern technology induces no adverse effects, as the insights are actually certainly not harmful. It is FDA-approved, enamel-safe, and also does not generate level of sensitivity. You don’t require any dental professional brows through or prescribeds to perform the treatment from the comfort of your very own residence.

Save On  Snow Teeth Whitening Voucher  2020Save On Snow Teeth Whitening Voucher 2020

Snowfall likewise refuses to evaluate on pets. There are actually two kits to select from. The components of each ought to last for over 90 treatments. Allow’s malfunction what they include and how to decide on the greatest one for you. This package is actually Snow’s best-known product, due to which they gained their attraction.

The All-in-One kKt coming from Snowfall includes: a wired LED mouthpiece,3 whitening wands,1 extra-strength whitening wand, anda cover overview. The mouthpiece works with the Snow app, so you can easily control just how deeply you desire to bleach your pearly whites. Save On Snow Teeth Whitening Voucher 2020. It possesses a wire that lets you attach to USB, apples iphone, and other mobile phones.

Save On Snow Teeth Whitening Voucher 2020

It may be noticeable, but the most significant difference between the 2 packages is the cordless feature. Over 3 thousand were actually devoted on study and also advancement, bring in brand new functions feasible. The materials of The Wireless Charging Home Pearly Whites Whitening Set feature: a wireless LED mouthpiece, a docking station,3 whitening sticks,1 maximum toughness whitening stick,1 anesthetizing product, lip procedure, USB wire, andan guideline manual.

The final component enables the treatment to become changed to your demands. It programs instantly, thus all you must do is actually trigger it on the app. The mouthpiece is water-proof. This suggests you can carefully utilize it in the downpour. What’s additional, it cleans itself while demanding. There is additionally a red-light procedure choice for your periodontals.

Depending on to analysis, it aids: do away with microorganisms, lower pearly white level of sensitivity, boost blood stream flow in the periodontals, protect against receding periodontal lines, boost bone thickness, andminimize post-whitening irritation. The docking terminal features a hidden layout, people commonly match up the method it hopes to a bluetooth audio speaker. Besides disinfecting and billing the mouth piece, it additionally doubles as a penholder as well as travel scenario for your cream wands.

Results are guaranteed to become visible after 7 days of utilization. The sets are simple to use ideal away from the box, therefore just about any individual can bleach their pearly whites along with Snow products. Here is actually a basic introduction: Safe forThose with dental crowns, bridges, as well as veneersTeeth with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they deliver their products worldwide, therefore your site will not restrict you.

Save On Snow Teeth Whitening Voucher 2020

It is advised that you clean as well as use floss your pearly whites before performing the therapy. Oral care assists take out any food debris as well as contaminations (Save On Snow Teeth Whitening Voucher 2020). This enables even protection of the item. You yearn for all areas of your pearly whites to become brightened!Moreover, plaque and also germs, which sometimes get caught in between the serum as well as the pearly whites, make it a lot more very likely for you to experience tooth decay or even various other dental problems.

This measure is certainly not required if your teeth doesn’t generally react to temperature level or wonderful or even hard meals. It certainly not merely reduces sensitiveness however additionally builds up the pearly white enamel. The formula is furthermore loaded with minerals and vitamins. If you choose to utilize the anesthetizing cream, perform this 15 mins just before the whitening treatment as well as then rinse out.

Usage either the normal or extra-strength whitening product, relying on the end results you wish. Spin the wand to acquire the item out. You could have to do this approximately 30 opportunities when you first use it. The comb idea will certainly help you use the serum. Envision you are painting a white colored sentry fencing (Save On Snow Teeth Whitening Voucher 2020).

If you love your gum tissues rub it off the greatest you can. A percentage won’t injure, but the item was actually developed for teeth just. The cordless LED tool has a “shake to wake up” feature. Listed below are actually the standard guidelines for this function: Shake once to turn it on.

Save On Snow Teeth Whitening Voucher 2020

A third opportunity for the gum treatment. Shaking it 4 times will certainly put it to sleep. You can easily also install the application to individualize your treatment. When you are actually carried out, position the illumination back right into the owner. If you have actually the wired mouthpiece as an alternative, merely link it as much as your phone to trigger it.

Keep it in for 9 to 30 moments each time, 21-30 times in a row. If you take place to experience some sensitivity, take a 1 to 3-day rest and continue the therapy later on. It’s ideal to conduct your sessions prior to going to sleep. By doing this they don’t interfere along with eating or drinking.

The cordless kind is going to self-sanitize while demanding. Shop your whitening sticks in the refrigerator after using all of them. This can assist them keep their strength over a longer period. The packages feature a supply for months of treatments, so it’s an excellent tip to take the greatest feasible care of your products.

The system may be matched up to a professional procedure setting you back $five hundred-$ 1,000. For a considerably reduced price you can possibly do this coming from the convenience of your personal residence. You may buy your Snowfall whitening package exactly on their internet site, but it’s likewise readily available on Amazon.com. Listed below is an overview of how a lot Snowfall whitening products currently price: ProductPriceAll-in-one kit$ 199Wireless demanding package$ 299Extra stamina refills$ 49Add-on for vulnerable teeth$ 25Serum refill sticks$ 25There are even payment possibilities for those that do not wish to be actually out the cash simultaneously – Save On Snow Teeth Whitening Voucher 2020.

Save On Snow Teeth Whitening Voucher 2020

Save On  Snow Teeth Whitening Voucher  2020Save On Snow Teeth Whitening Voucher 2020

This are going to happen instantly as well as no bills are going to be sent out, so you can easily just enjoy your products. There is actually also a 30-day money-back warranty and a 5-year manufacturer’s warranty on electronic devices. It’s valid after you activate it on the Snow internet site. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 delighted customersSuperior outcomes without causing sensitivityHelps clear away tough coffee and red or white wine stains30-days funds back ensure Authorization Dental approves payment coming from 3rd party companies.

After seeing social media sites swamped with individuals raving concerning just how awesome the Snowfall Pearly white Whitening body is, I must determine. One that mixes all the most effective parts of pearly whites whitening and also overlooks all the bad ones? Yeah, sure (Save On Snow Teeth Whitening Voucher 2020). If you are a tough believer that everything as well really good to become accurate is actually exactly that, below’s a teeth whitening body to confirm you incorrect.

Snow is also extremely cost effective, at lower than 1/10th the price of specialist whitening at the dentist. Additionally, Snowfall Teeth Whitening performs certainly not result in sensitivity. You can possess your frozen yogurt as well as consume it also! Or even is that covered? Regardless, you may have both when your teeth may not be falling out coming from bangs of chemical treatments that white colored bits frequently consist of.

Truthfully,. The LED lighted mouthpiece accelerates the whitening coming from the gel on your teeth resulting in faster, a lot longer lasting as well as much more effective whitening without inducing sensitiveness. The LED lighting allows you to make use of Snow for a much shorter time period with the same whitening affects matched up to other systems.

Save On Snow Teeth Whitening Voucher 2020

These are actually real, overdue Snow customers’ reviews/before and after teeth whitening images undergone our company within the final 30 times. These are actually real, unsettled Snowfall consumers’ reviews/before and after teeth whitening photos sent to us within the last thirty days. Incredible product !! A single that has operated for me! And also no sensitiveness!! AMAZING!! Purchase this emotion incredibly skepitcal (Save On Snow Teeth Whitening Voucher 2020).

Save On  Snow Teeth Whitening Voucher  2020Save On Snow Teeth Whitening Voucher 2020

Affection it !!! Best funds I have actually invested in a questionable item. Finally one thing that definitely measures up to its own insurance claims! I have actually been utilizing this and would suggest, I have actually found a difference after 4 times I like this item! I have just utilized it 3 times user-friendly and no level of sensitivity…, I even forgot to utilize the after product for the periodontals the first 2 opportunities! …

It does exactly what they mentioned it will carry out, yes to every little thing!!!! I was pretty doubtful yet I’m very satisfied after 2 usages today. “The most effective pearly whites whitening body for delicate teeth” “Take pearly whites whitening to the next confess an at-home package that rivals a browse through to your area helpful dentist.” “Two near good friends talked about just how white colored my teeth took care of utilizing this set only two opportunities!”.

When you get the Snowfall whitening system, you acquire the complying with in every package: Lotion wands LED rack Shade manual that aids you track your progression Instructions on just how to make use of the systemGetting began along with Snowfall is quick and easy, and also the resource will definitely stroll you via everything you need to recognize on how to utilize the whitening system.

Save On Snow Teeth Whitening Voucher 2020

Save On  Snow Teeth Whitening Voucher  2020Save On Snow Teeth Whitening Voucher 2020

It does not measure up to some of its own pledges, however it’s still a valuable assets if you’re trying to find whiter pearly whites, and also is actually much better than many various other whitening products around. The Powder snow is relatively direct to utilize. Brush your teeth before you start. Administer the cream to your teeth properly, ensuring you obtain also insurance coverage.

After 10-30 minutes, clear away the holder as well as rinse your teeth. Replay this process over the upcoming times as well as weeks. This process corresponds to some various other whitening items. However the lotion and also LED lightweight exposure make it different than many other strips as well as trays. Yet different doesn’t constantly imply far better.

Teeth were actually noticeably whiter after just a few times of making use of. And also with expanded usage, there was impressive development. Yellow teeth, although not snowfall white, were visibly whiter. It took a bit longer than Snowfall promises, however the body does offer end results relatively promptly.

Permit’s encounter it. Several of the best addicting drinks and also behaviors are certainly not the very best for our teeths. Luckily, if you prefer white colored teeth, you do not need to point out goodbye to coffee, soft drink, sweets, tea, red or white wine, as well as smoking given that there are a lot of teeth whitening packages to select coming from (our company still highly recommend that you kick the cigarette smoking behavior for evident explanations). Pearly white whitening is a $ 3.2 billion all over the world field.

Save On Snow Teeth Whitening Voucher 2020

The good news is, if you yearn for to conserve funds, there are many effective packages that you can easily make use of at property. There are actually practically two kinds of kits: ones that bleach your pearly whites to take spots off as well as ones that physically remove the blemishes. Activated charcoal grains have ended up being rather well-liked in current years.

Whitening holders as well as strips have been the criterion for years and also normally rely upon carbamide or even hydrogen peroxide. There is actually a third sort of teeth whitening item that merely blasts your pearly whites with LED lighting. Nonetheless, professionals interviewed through the Wirecutter claim any type of gains from this procedure are short-term. Only the SmileDirectClub body in our overview uses this modern technology, however it is actually used together with a whitening gel.

Pregnant or even nursing females must certainly not use peroxide-based whitening items. It additionally isn’t suited for youngsters under 14 years old. Save On Snow Teeth Whitening Voucher 2020. And, you ought to not use peroxide for longer than two weeks of regular use without the oversight of a dental expert. The FDA does certainly not advise making use of any sort of whitening gels with a peroxide concentration of higher than 18%.

You need to have to become careful making use of whitening items, as Buyer Information details. For example, if your dim pearly whites are because of the natural decreasing of pearly white enamel that includes growing old, whitening kits will certainly certainly not help you. Also, they can easily certainly not whiten dental fillings, false teeths, veneers, crowns, or caps. Professionals say that whitening sets are safe when made use of as guided – Save On Snow Teeth Whitening Voucher 2020.

Save On Snow Teeth Whitening Voucher 2020

As a result, about a full week just before you begin your whitening regimen, make use of a tooth paste specifically designed for folks with vulnerable pearly whites or one that creates up enamel. And also, skip a time or 2 of making use of if you perform experience sensitiveness. The English Dental Publication has actually discharged new research that states there wants clinical proof to prove the cosmetic and health and wellness advantages of activated charcoal toothpastes as well as particles, which they may induce decay.

Save On Snow Teeth Whitening Voucher 2020

Save On Snow Teeth Whitening Voucher 2020

Snow is an innovator on the home teeth whitening market. The exclusive whitening formula is applauded for managing to get rid of also the hardest stains without resulting in level of sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 pleased customersSuperior end results without causing sensitivityHelps remove difficult coffee and red wine stains30-days loan back guaranteeSnow creates teeth whitening handy without any workplace sees, annoying bits, or even untidy use.

The Snowfall procedure is actually an LED-activated pearly whites whitening unit that targets all type of spots. This consists of those resulted in through red wine, herbal tea, coffee, and tobacco. The patent-pending light-accelerated technology creates no side effects, as the wavelengths are actually certainly not dangerous. It is actually FDA-approved, enamel-safe, as well as doesn’t cause level of sensitivity. You do not need to have any sort of dental professional brows through or prescribeds to perform the treatment coming from the comfort of your own home.

Save On Snow Teeth Whitening  Voucher 2020Save On Snow Teeth Whitening Voucher 2020

Snowfall also declines to examine on animals. There are pair of packages to decide on. The materials of each need to last for over 90 uses. Allow’s malfunction what they have as well as just how to decide on the best one for you. This set is Snowfall’s best-known product, with the help of which they obtained their appeal.

The All-in-One kKt from Snowfall includes: a wired LED mouthpiece,3 whitening sticks,1 extra-strength whitening stick, anda shade resource. The mouth piece works with the Snowfall application, therefore you can handle how extremely you intend to lighten your teeth. Save On Snow Teeth Whitening Voucher 2020. It possesses a cord that allows you hook up to USB, apples iphone, and also various other smart devices.

Save On Snow Teeth Whitening Voucher 2020

It may be obvious, yet the most significant distinction between both kits is the wireless function. Over 3 million were actually invested in r & d, making brand-new performances achievable. The materials of The Wireless Charging At-home Teeth Whitening Kit consist of: a wireless LED mouthpiece, a docking terminal,3 whitening sticks,1 maximum stamina whitening stick,1 making less sensitive cream, lip treatment, USB cable television, andan guideline guidebook.

The last function makes it possible for the procedure to be actually adjusted to your requirements. It programs immediately, therefore all you possess to carry out is actually trigger it on the application. The mouth piece is actually waterproof. This suggests you can securely use it in the downpour. What is actually additional, it cleans on its own while asking for. There is also a red-light procedure possibility for your gums.

Depending on to research study, it helps: do away with germs, reduce tooth level of sensitivity, enhance blood stream flow in the periodontals, avoid receding periodontal lines, increase bone quality, andminimize post-whitening swelling. The docking terminal includes an unnoticeable style, people usually contrast the means it aims to a bluetooth sound speaker. Besides cleaning and also asking for the mouth piece, it also functions as a penholder and travel case for your product wands.

Results are actually ensured to become apparent after 7 days of making use of. The kits are user-friendly best out of package, so virtually anybody can bleach their teeth along with Snow products. Listed below is actually a standard introduction: Safe forThose with crowns, bridges, as well as veneersTeeth along with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they deliver their products worldwide, thus your site won’t restrict you.

Save On Snow Teeth Whitening Voucher 2020

It is encouraged that you comb and dental floss your pearly whites prior to performing the therapy. Oral hygiene aids remove any kind of food fragments and also contaminations (Save On Snow Teeth Whitening Voucher 2020). This enables for also coverage of the item. You prefer all surfaces of your pearly whites to become brightened!Moreover, oral plaque buildup and also germs, which at times receive trapped in between the product and also the teeth, create it a lot more very likely for you to experience tooth decay or other oral problems.

This step is actually not needed if your teeth doesn’t typically react to temp or sweet or even challenging foods items. It not just decreases level of sensitivity however additionally builds up the pearly white polish. The formula is also loaded with minerals and vitamins. If you choose to utilize the numbing serum, do this 15 moments just before the whitening session and after that rinse.

Make use of either the regular or even extra-strength whitening serum, depending upon the end results you want. Spin the stick to receive the product out. You could must perform this around 30 opportunities when you first utilize it. The comb pointer will certainly help you use the serum. Envision you are coating a white sentry fence (Save On Snow Teeth Whitening Voucher 2020).

If you get it on your gums rub it off the greatest you can. A small volume will not harm, yet the product was developed for teeth merely. The wireless LED device possesses a “shake to wake” function. Here are actually the general instructions for this feature: Shake the moment to transform it on.

Save On Snow Teeth Whitening Voucher 2020

A third time for the gum tissue therapy. Drinking it four opportunities will definitely place it to rest. You may additionally download and install the application to individualize your procedure. The moment you are actually done, position the light back into the owner. If you have actually the wired mouth piece rather, just connect it around your phone to trigger it.

Keep it in for 9 to thirty minutes daily, 21-30 days in a row. If you take place to experience some sensitivity, take a 1 to 3-day rest and also continue the procedure eventually. It’s absolute best to administer your treatments before going to sleep. In this manner they don’t hamper consuming or alcohol consumption.

The wireless kind will self-sanitize while demanding. Retail store your whitening sticks in the refrigerator after using them. This can easily aid all of them keep their durability over a longer time frame. The packages feature a source for months of uses, so it is actually a good concept to take the very best possible care of your items.

The device may be contrasted to a specialist procedure setting you back $five hundred-$ 1,000. For a considerably reduced cost you can possibly do this coming from the convenience of your own property. You may get your Snowfall whitening kit precisely their website, yet it’s additionally available on Amazon.com. Listed below is an outline of exactly how a lot Snowfall whitening items currently expense: ProductPriceAll-in-one set$ 199Wireless billing set$ 299Extra toughness refills$ 49Add-on for delicate teeth$ 25Serum refill wands$ 25There are also remittance alternatives for those that don’t would like to be out the cash all at once – Save On Snow Teeth Whitening Voucher 2020.

Save On Snow Teeth Whitening Voucher 2020

Save On Snow Teeth Whitening  Voucher 2020Save On Snow Teeth Whitening Voucher 2020

This are going to take place automatically as well as no costs will certainly be sent, so you may just appreciate your products. There is actually likewise a 30-day money-back promise and also a 5-year warranty on electronics. It stands after you trigger it on the Snowfall site. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 happy customersSuperior outcomes without leading to sensitivityHelps eliminate hard coffee and a glass of wine stains30-days refund guarantee Authorization Dental approves payment from third-party business.

After seeing social media sites flooded along with folks raving regarding just how spectacular the Snow Pearly white Whitening unit is actually, I had to figure out. One that integrates all the most ideal pieces of pearly whites whitening and also neglects all the poor ones? Yeah, sure (Save On Snow Teeth Whitening Voucher 2020). If you are a strong believer that just about anything as well great to be true is actually specifically that, listed below’s a pearly whites whitening unit to prove you incorrect.

Snow is actually also incredibly budget-friendly, at lower than 1/10th the rate of professional whitening at the dental professional. Likewise, Snow Teeth Whitening performs not result in level of sensitivity. You may possess your gelato and consume it too! Or is that cake? In any case, you can possess each when your teeth may not be falling out coming from bangs of chemical therapies that white colored strips frequently contain.

Seriously,. The LED lighted mouth piece speeds up the whitening coming from the gel on your pearly whites resulting in a lot faster, longer long lasting and also a lot more dependable whitening without creating level of sensitivity. The LED light enables you to utilize Snowfall for a briefer time period with the exact same whitening has an effect on reviewed to other units.

Save On Snow Teeth Whitening Voucher 2020

These are real, overdue Snowfall consumers’ reviews/before and also after teeth whitening photographes accepted us within the final one month. These are actually real, overdue Snow clients’ reviews/before and also after teeth whitening images accepted our company within the last one month. Fantastic product !! A single that has worked with me! As well as no sensitivity!! AMAZING!! Procured this feeling extremely skepitcal (Save On Snow Teeth Whitening Voucher 2020).

Save On Snow Teeth Whitening  Voucher 2020Save On Snow Teeth Whitening Voucher 2020

Passion it !!! Best loan I have devoted on an undecided product. Lastly one thing that truly meets its insurance claims! I have been utilizing this and also would suggest, I have actually viewed a distinction after 4 times I enjoy this item! I have actually merely used it 3 times simple to use and no sensitivity…, I also failed to remember to make use of the after product for the periodontals the first 2 times! …

It carries out precisely what they stated it would perform, yes to every thing!!!! I was actually pretty unconvinced but I’m quite impressed after 2 make uses of today. “The best teeth whitening unit for vulnerable teeth” “Take pearly whites whitening to the next confess an at-home kit that rivals a visit to your neighborhood welcoming dental professional.” “Two buddies discussed just how white colored my teeth took care of utilizing this package merely 2 times!”.

When you get the Snowfall whitening unit, you receive the observing in every package: Product sticks LED holder Shadow resource that helps you track your progress Directions on exactly how to utilize the systemGetting started with Snow is actually quick and easy, and the overview will certainly stroll you via everything you need to recognize on exactly how to use the whitening body.

Save On Snow Teeth Whitening Voucher 2020

Save On Snow Teeth Whitening  Voucher 2020Save On Snow Teeth Whitening Voucher 2020

It does not measure up to several of its own assurances, but it’s still a beneficial investment if you’re appearing for whiter teeth, as well as is much better than the majority of various other whitening items on the market. The Powder snow is actually pretty straightforward to use. Brush your pearly whites just before you start. Apply the serum to your pearly whites properly, making certain you obtain also coverage.

After 10-30 minutes, eliminate the holder and also rinse your pearly whites. Loyal this procedure over the following days and also full weeks. This process is actually comparable to some other whitening products. However the product and LED light visibility create it various than many various other bits and holders. Yet various does not constantly indicate much better.

Teeth were visibly whiter after a few days of utilization. As well as with expanded usage, there was impressive development. Yellow teeth, although certainly not snow white, were actually clearly whiter. It took a little longer than Snowfall promises, yet the system does ship end results fairly promptly.

Permit’s face it. A few of the absolute most habit forming drinks and also habits are not the most effective for our brilliantly whites. Thankfully, if you really want white colored teeth, you do not have to bid farewell to coffee, soda, sweets, tea, wine, as well as smoking due to the fact that there are numerous pearly whites whitening sets to select from (we still advise that you stop the smoking cigarettes practice for noticeable factors). Teeth whitening is a $ 3.2 billion all over the world sector.

Save On Snow Teeth Whitening Voucher 2020

The good news is, if you prefer to conserve cash, there are actually many successful packages that you can easily utilize in your home. There are actually practically two sorts 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 ended up being fairly popular in latest years.

Whitening racks and also strips have been the criterion for decades as well as typically depend on carbamide or hydrogen peroxide. There is a 3rd form of teeth whitening item that merely blasts your teeth with LED illumination. However, specialists spoken with through the Wirecutter state any type of increases from this treatment are actually brief. Merely the SmileDirectClub unit in our quick guide utilizes this modern technology, yet it is made use of in conjunction along with a whitening gel.

Pregnant or even nursing females must certainly not utilize peroxide-based whitening products. It also isn’t ideal for youngsters under 14 years of ages. Save On Snow Teeth Whitening Voucher 2020. And, you need to certainly not make use of peroxide for longer than two full weeks of regular make use of without the supervision of a dental expert. The FDA carries out not recommend using any sort of whitening gels along with a peroxide attention of much higher than 18%.

You need to be actually mindful utilizing whitening products, as Consumer News discusses. For case, if your discolored pearly whites are actually due to the organic decreasing of tooth enamel that comes along with growing old, whitening kits will definitely certainly not assist you. Likewise, they can certainly not bleach dental fillings, false teeths, laminates, crowns, or caps. Experts claim that whitening packages are safe when utilized as directed – Save On Snow Teeth Whitening Voucher 2020.

Save On Snow Teeth Whitening Voucher 2020

Therefore, regarding a week before you begin your whitening routine, make use of a tooth paste primarily designed for people with vulnerable teeth or even one that develops polish. As well as, miss a time or 2 of use if you do experience sensitivity. The English Dental Publication has actually launched new analysis that states there is actually not enough scientific evidence to prove the cosmetic and wellness perks of triggered charcoal toothpastes and also powders, which they may result in tooth decay.