Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished Price

Snowfall is actually an innovator on the residence pearly whites whitening market. The exclusive whitening formula is actually commended for being actually capable to get rid of even the toughest discolorations without triggering level of sensitivity. SHORTCUTSProfessional-quality teeth whitening at homeOver 500,000 satisfied customersSuperior results without inducing sensitivityHelps remove challenging coffee and also a glass of wine stains30-days refund guaranteeSnow creates teeth lightening handy with no workplace visits, unpleasant strips, or messy use.

The Snowfall treatment is actually an LED-activated pearly whites whitening system that targets all kinds of spots. This consists of those caused through red wine, herbal tea, coffee, and also tobacco. The patent-pending light-accelerated modern technology leads to no negative effects, as the insights are certainly not harmful. It is actually FDA-approved, enamel-safe, and also doesn’t induce level of sensitivity. You do not need to have any kind of dentist sees or even prescribeds to perform the treatment coming from the comfort of your own residence.

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

Snow also refuses to check on pets. There are two kits to decide on. The components of each ought to last for over 90 treatments. Allow’s malfunction what they contain as well as exactly how to decide on the most ideal one for you. This kit is actually Snowfall’s best-known product, many thanks to which they gained their recognition.

The All-in-One kKt coming from Snow consists of: a wired LED mouthpiece,3 whitening wands,1 extra-strength whitening stick, anda shade quick guide. The mouthpiece works with the Snow application, so you can easily regulate exactly how deeply you wish to bleach your teeth. Snow Teeth Whitening Kit Refurbished Price. It happens along with a wire that allows you connect to USB, apples iphone, and various other cell phones.

Snow Teeth Whitening Kit Refurbished Price

It may be actually evident, yet the most significant difference in between the 2 packages is the cordless function. Over 3 thousand were actually spent on analysis and also progression, bring in brand-new capabilities achievable. The materials of The Wireless Charging Home Teeth Whitening Kit include: a cordless LED mouthpiece, a docking terminal,3 whitening sticks,1 maximum toughness whitening stick,1 anesthetizing cream, lip therapy, USB cable television, andan instructions.

The final feature allows the therapy to become readjusted to your necessities. It plans immediately, therefore all of you must do is actually activate it on the app. The mouthpiece is water-proof. This indicates you may carefully utilize it in the shower. What’s more, it sanitizes itself while charging. There is actually additionally a red-light treatment choice for your gum tissues.

According to research, it helps: remove microorganisms, decrease pearly white level of sensitivity, enhance blood stream flow in the gums, protect against declining gum lines, boost bone tissue quality, andminimize post-whitening inflammation. The docking station features a hidden style, patients usually review the way it appears to a bluetooth speaker. Besides sterilizing and billing the mouthpiece, it likewise doubles as a penholder as well as trip instance for your cream wands.

Results are actually assured to be actually visible after 7 days of usage. The packages are user-friendly correct away from the carton, thus practically anyone can lighten their teeth with Snowfall products. Right here is actually a basic outline: Safe forThose along with dental crowns, links, and also veneersTeeth along with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they transport their items worldwide, thus your area will not restrict you.

Snow Teeth Whitening Kit Refurbished Price

It is highly recommended that you clean as well as floss your pearly whites prior to carrying out the procedure. Dental hygiene aids clear away any sort of meals particles and pollutants (Snow Teeth Whitening Kit Refurbished Price). This permits also coverage of the product. You want all surfaces of your pearly whites to become brightened!Moreover, oral plaque buildup and micro-organisms, which occasionally acquire trapped between the product as well as the pearly whites, produce it a lot more likely for you to experience pearly white decay or even various other oral issues.

This action is actually certainly not needed if your dentition does not normally react to temperature or even delightful or even hard foods items. It not only lessens level of sensitivity however likewise enhances the pearly white polish. The formula is actually additionally filled along with minerals and also vitamins. If you determine to use the anesthetizing serum, do this 15 moments prior to the whitening treatment and then rinse out.

Use either the frequent or extra-strength whitening lotion, relying on the results you want. Spin the wand to acquire the product out. You could must do this up to 30 opportunities when you first utilize it. The comb idea will certainly aid you administer the lotion. Envision you are actually repainting a white colored sentry fencing (Snow Teeth Whitening Kit Refurbished Price).

If you love your gums rub it off the most ideal you can. A percentage won’t injure, but the item was developed for pearly whites merely. The wireless LED unit possesses a “shake to wake up” function. Below are the general instructions for this function: Shake the moment to switch it on.

Snow Teeth Whitening Kit Refurbished Price

A third time for the gum tissue procedure. Trembling it four opportunities will put it to sleep. You can easily also download and install the app to customize your therapy. As soon as you are actually carried out, put the light back in to the holder. If you have actually the wired mouthpiece as an alternative, merely attach it as much as your phone to trigger it.

Keep 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 breather and also continue the treatment later. It is actually absolute best to administer your sessions before going to sleep. In this manner they do not obstruct eating or consuming.

The cordless kind will self-sanitize while charging. Shop your whitening sticks in the fridge after using all of them. This can easily aid all of them maintain their toughness over a longer duration. The packages feature a source for months of treatments, so it is actually a really good idea to take the most effective feasible care of your products.

The body may be actually contrasted to an expert procedure setting you back $five hundred-$ 1,000. For a considerably reduced cost you can do this from the comfort of your own house. You can order your Snowfall whitening kit right on their site, however it is actually likewise readily available on Amazon. Here is a guide of just how a lot Snow whitening products presently expense: ProductPriceAll-in-one package$ 199Wireless billing kit$ 299Extra stamina refills$ 49Add-on for delicate pearly whites$ 25Serum refill wands$ 25There are actually even repayment choices for those that do not really want to be out the cash simultaneously – Snow Teeth Whitening Kit Refurbished Price.

Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

This will definitely happen instantly as well as no costs are going to be actually sent out, so you may just appreciate your items. There is also a 30-day money-back warranty as well as a 5-year warranty on electronic devices. It’s legitimate after you activate it on the Snowfall site. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 pleased customersSuperior outcomes without triggering sensitivityHelps get rid of tough coffee and also red wine stains30-days refund assure Authority Dental approves payment from third-party companies.

After finding social media sites swamped with people raving concerning exactly how amazing the Snow Teeth Whitening system is actually, I must locate out. One that combines all the most ideal parts of pearly whites whitening as well as overlooks all the negative ones? Yeah, certain (Snow Teeth Whitening Kit Refurbished Price). If you are actually a powerful enthusiast that anything too good to be actually accurate is actually specifically that, listed below’s a pearly whites whitening unit to confirm you incorrect.

Snowfall is additionally very economical, at lower than 1/10th the cost of qualified whitening at the dentist. Likewise, Snowfall Pearly Whites Whitening performs certainly not result in level of sensitivity. You can have your ice cream and also consume it as well! Or even is actually that birthday cake? In any case, you may possess both when your pearly whites may not be befalling coming from bangs of chemical treatments that white bits frequently include.

Frankly,. The LED ignited mouthpiece accelerates the whitening from the gel on your pearly whites leading to much faster, longer enduring and also extra dependable whitening without creating level of sensitivity. The LED illumination allows you to utilize Snowfall for a shorter time period along with the exact same whitening influences contrasted to other bodies.

Snow Teeth Whitening Kit Refurbished Price

These are actually true, unsettled Snowfall customers’ reviews/before and after pearly whites whitening pictures provided to us within the final one month. These are actually true, unpaid Snow consumers’ reviews/before as well as after teeth whitening images undergone our company within the final thirty days. Awesome item !! Simply one that has actually benefited me! And no sensitiveness!! AMAZING!! Acquired this emotion very skepitcal (Snow Teeth Whitening Kit Refurbished Price).

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

Affection it !!! Best funds I have actually invested on a doubtful product. Ultimately something that definitely measures up to its own insurance claims! I have actually been using this and also will recommend, I’ve seen a variation after 4 days I like this item! I have actually merely utilized it 3 opportunities simple to use and also no sensitivity…, I also overlooked to make use of the after item for the periodontals the very first 2 opportunities! …

It carries out exactly what they said it would perform, yes to every little thing!!!! I was fairly suspicious however I’m incredibly pleased after 2 make uses of today. “The greatest teeth whitening unit for sensitive teeth” “Take teeth whitening to the upcoming level with an at-home set that measures up to a check out to your community pleasant dentist.” “2 close pals talked about how white colored my teeth cared for utilizing this set merely 2 opportunities!”.

When you get the Snow whitening body, you acquire the observing in every package: Lotion wands LED rack Shadow resource that helps you track your progression Guidelines on exactly how to utilize the systemGetting started with Snow is very easy, and also the overview will definitely stroll you via everything you need to have to know on just how to utilize the whitening system.

Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

It does not meet a few of its guarantees, but it is actually still a worthwhile investment if you are actually seeking whiter teeth, as well as is much better than most various other whitening items out there. The Snowfall is actually fairly simple to make use of. Brush your pearly whites just before you begin. Use the serum to your teeth properly, ensuring you even the score insurance coverage.

After 10-30 minutes, take out the rack and rinse your pearly whites. Regular this process over the next times and weeks. This method resembles a few other whitening products. Yet the serum and also LED lightweight visibility make it different than a lot of other bits and holders. Yet various doesn’t always mean far better.

Teeth were significantly whiter after only a handful of times of making use of. As well as with extended make use of, there was actually significant improvement. Yellow teeth, although not snowfall white colored, were actually clearly whiter. It took a little bit longer than Snow promises, however the device carries out offer end results relatively quickly.

Let’s encounter it. A number of the absolute most addictive refreshments and behaviors are not the very best for our teeths. Fortunately, if you desire white colored pearly whites, you don’t have to leave to coffee, soft drink, sugary foods, tea, white wine, and cigarette smoking since there are actually many pearly whites whitening sets to decide on (our company still highly recommend that you kick the smoking cigarettes practice for obvious main reasons). Teeth whitening is a $ 3.2 billion all over the world industry.

Snow Teeth Whitening Kit Refurbished Price

Thankfully, if you wish to spare money, there are actually numerous effective sets that you can easily use in the home. There are practically two sorts of packages: ones that bleach your pearly whites to take spots off and ones that physically remove the spots. Activated charcoal powders have ended up being pretty prominent lately.

Whitening holders as well as strips have been actually the requirement for many years as well as usually depend on carbamide or hydrogen peroxide. There is actually a third sort of pearly whites whitening product that simply blasts your teeth with LED illumination. Nevertheless, professionals questioned by the Wirecutter mention any gains from this therapy are temporary. Simply the SmileDirectClub body in our guide utilizes this modern technology, however it is actually used together with a whitening gel.

Pregnant or even nursing ladies ought to not make use of peroxide-based whitening items. It likewise isn’t suitable for kids under 14 years of ages. Snow Teeth Whitening Kit Refurbished Price. And also, you must certainly not utilize peroxide for longer than 2 weeks of everyday make use of without the direction of a dental practitioner. The FDA does certainly not recommend using any type of whitening gels with a peroxide attention of more than 18%.

You require to become careful using whitening products, as Individual News reveals. For case, if your dark teeth are as a result of to the natural thinning of pearly white polish that features aging, whitening packages will certainly not aid you. Likewise, they can certainly not whiten dental fillings, false teeths, laminates, dental crowns, or limits. Pros claim that whitening sets are secure when made use of as routed – Snow Teeth Whitening Kit Refurbished Price.

Snow Teeth Whitening Kit Refurbished Price

For that reason, regarding a week before you begin your whitening routine, utilize a toothpaste exclusively made for people along with sensitive teeth or even one that creates up polish. As well as, miss a time or more of utilization if you do experience sensitivity. The British Dental Publication has released new study that states there is insufficient scientific evidence to verify the cosmetic and also health advantages of turned on charcoal toothpastes as well as powders, as well as that they may create tooth decay.

Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished Price

Snow is a forerunner on the home teeth whitening market. The proprietary whitening formula is commended for having the capacity to erase even the most difficult spots without triggering sensitivity. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 happy customersSuperior outcomes without resulting in sensitivityHelps take out difficult coffee and red wine stains30-days refund guaranteeSnow makes teeth lightening convenient along with no office gos to, annoying strips, or even untidy application.

The Snow therapy is an LED-activated pearly whites whitening body that targets all type of blemishes. This includes those created through red or white wine, tea, coffee, as well as cigarette. The patent-pending light-accelerated innovation causes no adverse effects, as the insights are actually certainly not dangerous. It is FDA-approved, enamel-safe, as well as doesn’t induce sensitivity. You don’t need any sort of dental professional brows through or prescribeds to accomplish the treatment coming from the convenience of your very own residence.

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

Snowfall likewise refuses to examine on animals. There are actually two sets to select from. The materials of each must last for over 90 uses. Allow’s break down what they have and also how to select the greatest one for you. This kit is Snowfall’s best-known product, with the help of which they acquired their level of popularity.

The All-in-One kKt coming from Snowfall consists of: a wired LED mouth piece,3 whitening sticks,1 extra-strength whitening stick, anda shade guide. The mouthpiece is actually appropriate along with the Snow app, so you can handle how extremely you wish to bleach your teeth. Snow Teeth Whitening Kit Refurbished Price. It features a wire that allows you attach to USB, apples iphone, as well as various other cell phones.

Snow Teeth Whitening Kit Refurbished Price

It may be actually apparent, but the largest distinction between the 2 sets is the wireless functionality. Over three thousand were invested in research and development, making brand-new capabilities feasible. The contents of The Wireless Charging At-home Teeth Whitening Set consist of: a cordless LED mouth piece, a docking terminal,3 whitening sticks,1 maximum strength whitening stick,1 anesthetizing product, lip therapy, USB cable television, andan user’s manual.

The last feature makes it possible for the therapy to become changed to your necessities. It systems automatically, therefore all of you possess to perform is actually trigger it on the application. The mouth piece is water resistant. This implies you can carefully use it in the shower. What’s even more, it cleans itself while demanding. There is also a red-light treatment choice for your periodontals.

Depending on to analysis, it assists: deal with micro-organisms, minimize tooth sensitiveness, boost blood flow in the periodontals, avoid receding gum lines, rise bone quality, andminimize post-whitening swelling. The docking station includes a hidden style, clients typically review the technique it hopes to a bluetooth audio speaker. Besides sterilizing and also demanding the mouth piece, it additionally increases as a penholder and also travel scenario for your cream wands.

Results are guaranteed to be visible after 7 days of utilization. The sets are easy to utilize ideal out of package, therefore almost anybody can lighten their pearly whites along with Snow items. Below is actually an overall guide: Safe forThose with crowns, bridges, and veneersTeeth with fillingsPregnant womenBreastfeeding momsSensitive dentitionAdditionally, they transport their items worldwide, thus your place will not limit you.

Snow Teeth Whitening Kit Refurbished Price

It is recommended that you comb as well as use floss your teeth just before carrying out the treatment. Oral health assists get rid of any type of food clutter and pollutants (Snow Teeth Whitening Kit Refurbished Price). This permits even protection of the item. You yearn for all surface areas of your teeth to be actually brightened!Moreover, plaque and microorganisms, which occasionally get trapped between the product and also the teeth, make it much more most likely for you to experience pearly white degeneration or other dental problems.

This step is not required if your dentition does not normally react to temperature level or even sweet or even hard foods. It certainly not merely minimizes level of sensitivity yet likewise reinforces the tooth polish. The formula is actually in addition full of minerals and vitamins. If you make a decision to use the making less sensitive cream, do this 15 mins just before the whitening treatment and after that rinse out.

Make use of either the frequent or extra-strength whitening product, depending on the outcomes you yearn for. Spin the wand to receive the product out. You could need to perform this around 30 opportunities when you first use it. The brush pointer will definitely aid you administer the product. Imagine you are coating a white sentry fence (Snow Teeth Whitening Kit Refurbished Price).

If you get it on your gum tissues rub it off the finest you can. A percentage will not harm, however the item was made for pearly whites just. The wireless LED tool possesses a “shake to wake up” function. Here are actually the overall guidelines for this feature: Shake the moment to switch it on.

Snow Teeth Whitening Kit Refurbished Price

A third time for the periodontal procedure. Trembling it 4 times will place it to sleep. You may likewise download and install the app to individualize your therapy. As soon as you are actually performed, put the light back into the owner. If you have the wired mouthpiece rather, simply connect it around your phone to activate it.

Keep it in for 9 to thirty minutes daily, 21-30 times straight. If you happen to experience some sensitiveness, take a 1 to 3-day break as well as continue the therapy eventually. It’s ideal to administer your treatments just before going to sleep. Through this they don’t hinder consuming or even alcohol consumption.

The cordless kind will definitely self-sanitize while asking for. Store your whitening sticks in the refrigerator after using them. This can easily help all of them keep their strength over a longer time frame. The kits consist of a supply for months of treatments, so it’s a really good suggestion to take the very best possible care of your items.

The body could be matched up to a professional procedure costing $500-$ 1,000. For a considerably lower price you can possibly do this from the convenience of your personal house. You can easily purchase your Snow whitening set precisely their web site, but it’s also available on Amazon.com. Here is an outline of how a lot Snowfall whitening items presently expense: ProductPriceAll-in-one package$ 199Wireless asking for kit$ 299Extra durability refills$ 49Add-on for sensitive pearly whites$ 25Serum refill wands$ 25There are actually even settlement options for those who don’t intend to be actually out the money all at as soon as – Snow Teeth Whitening Kit Refurbished Price.

Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

This will definitely happen immediately and also no expenses are going to be delivered, so you can merely appreciate your products. There is likewise a 30-day money-back promise as well as a 5-year guarantee on electronic devices. It stands after you trigger it on the Snow web site. SHORTCUTSProfessional-quality pearly whites whitening at homeOver 500,000 pleased customersSuperior outcomes without triggering sensitivityHelps eliminate difficult coffee and white wine stains30-days refund promise Authority Dental approves payment from third-party business.

After observing social media flooded along with people raving concerning exactly how awesome the Snow Pearly white Whitening body is, I needed to determine. One that combines all the most effective items of pearly whites whitening and excludes all the poor ones? Yeah, sure (Snow Teeth Whitening Kit Refurbished Price). If you are actually a tough enthusiast that anything as well really good to become accurate is specifically that, here is actually a pearly whites whitening system to show you wrong.

Snowfall is additionally incredibly affordable, at less than 1/10th the cost of specialist whitening at the dental expert. Additionally, Snow Teeth Whitening carries out certainly not induce sensitiveness. You may have your gelato as well as consume it as well! Or is that covered? In any case, you may possess both when your teeth aren’t befalling from bursts of chemical therapies that white colored strips often contain.

Seriously,. The LED ignited mouthpiece increases the whitening from the gel on your pearly whites causing faster, much longer long-term and a lot more effective whitening without leading to sensitiveness. The LED light enables you to use Snow for a briefer time period with the very same whitening has an effect on matched up to other devices.

Snow Teeth Whitening Kit Refurbished Price

These are actually true, unpaid Snowfall clients’ reviews/before and also after teeth whitening photos accepted our company within the final 1 month. These are true, unpaid Snowfall customers’ reviews/before as well as after pearly whites whitening images undergone our company within the last thirty day. Amazing item !! Just one that has helped me! And no sensitiveness!! AMAZING!! Purchase this sensation really skepitcal (Snow Teeth Whitening Kit Refurbished Price).

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

Passion it !!! Best money I have actually invested in an iffy item. Eventually something that definitely lives up to its cases! I have been utilizing this and will suggest, I have actually seen a variation after 4 times I adore this item! I have merely used it 3 opportunities simple to use and no sensitivity…, I even neglected to use the after product for the gum tissues the initial 2 times! …

It does specifically what they said it would carry out, yes to whatever!!!! I was actually fairly suspicious yet I’m very satisfied after 2 uses today. “The greatest pearly whites whitening system for sensitive pearly whites” “Take teeth whitening to the following confess an at-home set that rivals a browse through to your community pleasant dentist.” “2 friends talked about how white my pearly whites cared for using this package simply two opportunities!”.

When you get the Snow whitening unit, you get the following in every package: Lotion wands LED holder Umbra quick guide that helps you track your improvement Instructions on just how to use the systemGetting started with Snowfall is actually simple, and also the overview will certainly walk you by means of everything you require to recognize on just how to use the whitening body.

Snow Teeth Whitening Kit Refurbished Price

Snow Teeth Whitening Kit Refurbished PriceSnow Teeth Whitening Kit Refurbished Price

It does not stay up to a number of its own guarantees, however it is actually still a beneficial investment if you are actually trying to find whiter teeth, and also is far better than a lot of other whitening products around. The Snowfall is actually relatively straightforward to make use of. Comb your pearly whites before you start. Apply the lotion to your pearly whites meticulously, seeing to it you get back at coverage.

After 10-30 minutes, clear away the holder and also rinse your pearly whites. Replay this procedure over the following days and also weeks. This process corresponds to some other whitening items. But the lotion as well as LED lightweight visibility produce it different than many various other bits as well as trays. Yet different does not constantly imply much better.

Pearly white were visibly whiter after just a couple of days of make use of. And also along with stretched usage, there was impressive progress. Yellow pearly whites, although certainly not snowfall white, were actually visibly whiter. It took a little bit longer than Snowfall vows, however the system does provide results reasonably quickly.

Let’s experience it. Some of the very most addicting refreshments as well as behaviors are actually not the greatest for our pearly whites. The good news is, if you want white teeth, you do not must mention bye-bye to coffee, soda, desserts, herbal tea, a glass of wine, as well as smoking because there are a lot of teeth whitening sets to pick from (our experts still encourage that you stop the cigarette smoking routine for obvious explanations). Teeth whitening is actually a $ 3.2 billion globally field.

Snow Teeth Whitening Kit Refurbished Price

Thankfully, if you would like to spare loan, there are actually a number of successful packages that you can easily make use of in the home. There are essentially 2 sorts of packages: ones that bleach your pearly whites to take discolorations off as well as ones that physically remove the stains. Switched on charcoal particles have actually come to be rather popular in recent times.

Whitening holders and also strips have actually been the standard for years and also commonly depend on carbamide or hydrogen peroxide. There is a third kind of teeth whitening product that simply blasts your teeth with LED lighting. Having said that, specialists spoken with due to the Wirecutter claim any kind of increases from this procedure are actually short-lived. Merely the SmileDirectClub system in our overview uses this innovation, but it is actually used combined with a whitening gel.

Expecting or even nursing women need to not utilize peroxide-based whitening items. It also isn’t appropriate for children under 14 years of ages. Snow Teeth Whitening Kit Refurbished Price. As well as, you need to certainly not utilize peroxide for longer than pair of weeks of everyday use without the direction of a dentist. The FDA performs certainly not suggest utilizing any kind of whitening gels along with a peroxide attention of higher than 18%.

You need to have to be actually mindful utilizing whitening products, as Consumer News reveals. For example, if your dim teeth are because of the organic thinning of tooth enamel that comes with getting older, whitening kits will certainly not assist you. Also, they can not whiten dental fillings, false teeths, laminates, crowns, or even hats. Pros claim that whitening packages are secure when utilized as routed – Snow Teeth Whitening Kit Refurbished Price.

Snow Teeth Whitening Kit Refurbished Price

As a result, about a week before you start your whitening routine, utilize a toothpaste particularly designed for people along with vulnerable pearly whites or even one that creates up enamel. And also, skip a time or even two of making use of if you do experience sensitivity. The British Dental Diary has discharged brand-new analysis that claims there is actually insufficient scientific evidence to prove the cosmetic and health benefits of activated charcoal tooth pastes and also particles, and also they might trigger tooth decay.