vendredi 22 avril 2011

All about Dynamic Views for Readers - Blogger Help

All about Dynamic Views for Readers - Blogger Help

dimanche 17 avril 2011

Am I really whitening? Tooth Dehydration and Laser Tooth Whitenin


Tooth dehydration is a common side effect with all teeth bleaching treatments. Once dehydrated, the teeth can look whiter. When rehydration happens (usually a few days), the dehydrated teeth relapse to a darker color. Knowing that teeth dehydrate during bleaching, one may wonder what the actual effects are of quick in-office laser teeth whitening. Could it be that there is no actual bleaching happening and that the teeth are just being dehydrated?

To better understand how a light source can dehydrate teeth its theory must be explained. When undergoing a laser teeth whitening procedure, the light hits the tooth at a very high intensity. The bleach on the surface of the tooth boils off into the air, which is the path of least resistance. Some bleach will infuse into the teeth and allow for some actual bleaching. As the light illuminates the tooth, darker colored parts of the tooth absorb the light rather than reflect it. This absorbed light is converted into heat energy. Areas of the tooth like the pulp chamber and dentin are the darkest so they heat up the most. This causes the tooth to heat up from the inside. As the tooth builds this uncontrollable internal heat, fluids in the pulp and dentin expand. This expansion pushes water out of the tooth through the protein matrix surrounding the enamel rods. 

Teeth are porous, so for the same reason they will allow bleach penetration, they will allow fluids out of the tooth. This dehydration as well as the overheating of the tooth is what causes the extreme pain that often is reported following light assisted bleaching procedures. This whole phenomenon is what makes using a light to bleach teeth ambiguous. The idea is to move bleach into the teeth for bleaching to occur. With the lights, all the "teeth fluids" could be moving out of the teeth. So bleach may have to go against the flow to get into the teeth. This could make for a very inefficient technique, as the bleach is always fighting against the current. The final result of this may be that the teeth lose water or dehydrate and appear whiter for a temporary time, usually around 72 hours. After that they began to recover and absorb water from the saliva, much like a sponge, and in so doing they turn dark again. 

The “Rod’s Deep Bleach” method acknowledges this theory as fact and in so doing, the method employs techniques to keep fluids in the teeth. TheMetaTray product also does this. 

The Controversy: Are bleaching lights necessary in professional laser teeth whitening treatments


There seems to be a bit of disagreement within the dental community regarding the effectiveness of laser beams or other sources of light in tooth bleaching. Some dentists believe that tooth bleaching is more effective with the use of lasers and other sources of light, while others are of the opinion that the effect of tooth bleaching remains the same, with or without the use of lasers or lights.

The makers of light-activated tooth bleaching products promptly claim that the use of light makes bleaching all the more effective. While different manufacturers give different reasons behind the effectiveness of light-activated tooth bleaching products, the general logic behind them is that the laser or light "activation" acts as a catalyst and triggers a quick degradation of the peroxide whitener. The laser or light aids the bleaching process by quickly converting the peroxide into the reactive oxygen free radicals. The effect speeds up the bleaching process and also makes it more intense, giving better whitening results.

Bleaching lights can cost a few thousand dollars, making the setup of such a system quite expensive for the dentist. Until recently, there was a general acceptance within the dental community that the lights or lasers were essential for tooth bleaching. It was only when a few dentists realized there were no clinical studies to prove this that the controversy began.

Many recent studies by prominent dentists have shown that bleaching compounds contained in tooth whitening products seem to work well and give good results even without the use of lasers or lights. The use of lasers or lights had no effect on the results. The study was done by using the "split arch" method, wherein the teeth on one side were treated using just the whitener, while the teeth on the other side were treated using the whitener as well as an activating light source. The study stated that the results were the same in both cases. The teeth on both sides were equally whitened in the initial comparisons as well as the evaluations that were made after one year of treatment. With a conclusion like this one might wonder if the lights are merely a marketing gimmick. 

This is why many manufacturers of tooth whitening products and dentists do not incorporate a light source as a part of the whitening process today. Some of the leading professional in-office brands that do not use an "activating" light or laser (or consider it to be optional) are:

• Ultradent Opalescence Xtra Boost
• Rembrandt Virtuoso Lightening Gel
• Niveous

Teeth Whitening at the Mall. Unsafe, but is it Illegal?




On my latest trip to the mall I couldn't believe my eyes. There it was in the middle of a busy mall, a lady performing teeth whitening on a patient while inviting others to join on the other two chairs she had available. As a curious consumer, I asked how much the teeth whitening procedure costs. She said $99 and it's guaranteed for 4 shades lighter. If you think these procedures are being done by dentists, think again.

Teeth Whitening at mall kiosks are growing in popularity due to consumer convenience and naivety, and the ability for kiosk operators to quickly find willing customers. These kiosks are generally franchise owned, so they are not administered by dental professionals. They are not dentists, RDHs or RDAs, rather workers “dressed up” in medical garments to give people a false sense they are being treated by a dental professional. Besides the fact that one would look ridiculous doing this procedure in the middle of a busy mall, it is also dangerous. The catch that makes the process legal is that operators do not place the product in the “patient’s” mouth. Instead, the “patient” inserts the bleaching product themselves.

Undergoing professional teeth whitening at a kiosk can cause irreversible damages to your teeth. The bleach generally used at these kiosks consists of high concentration hydrogen carbamide peroxide, usually 35%. This is what dental offices use. The chemicals at this high of a concentration are extremely acidic, and if not properly administered, can ruin tooth enamel.

Professional teeth whitening should always be done under the supervision of a DDS: A Dentist assesses patients, and decides on the advisability of bleaching, and prediction of outcome for each patient. Furthermore, the dentist will have knowledge of the oral anatomy, principles of patient care, and the possible dangers involved: i.e (if gums are not adequately protected or if there is gum disease).

Update 3/6/2008
Mall Teeth-Whitening Business has been Shut Down in South Carolina

A teeth-whitening business at Haywood Mall in Greenville has been ordered to shut down by state regulators who say that the operators are practicing dentistry without a license.

In issuing the order, the state regulators said that the light the business uses for teeth whitening is is so strong it is only allowed to be used by a licensed dentist.

A state dentistry official told WYFF News 4 that similar businesses are being shut down all across the country. 

Update 3/22/2008
ABC News released a video piece on this titled Teeth Whitening Kiosks at the Mall. It looks like these kiosk operators did not know what they were doing.

Update 8/11/2008
All Glamour White locations have been shut down in Oklahoma.
iSmile, located at Tulsa's Promenade Mall is still open, but have limited their staff to one employee and no longer wear white lab coats to give the appearance that they are following the law. Read more about it here.

Update 1/15/2009
Tennessee bans teeth whitening kiosks. The state now requires treatments to be performed only by licensed dentists, dental hygienists or registered dental assistants supervised by a dentist. Source

Update 3/16/2009
Alabama bans teeth whitening kiosks. Read more about it here.

Update 11/20/2009
The ADA has asked the FDA to evaluate teeth whitening product compounds for safety and classify them. Depending on the outcome of that evaluation, the whitening compounds could be available on an unrestricted, over-the-counter basis or, if determined to be at the upper end of risky, could be restricted to prescription-only availability.

"The tremendous expansion of products available directly to consumers and application of products in venues such as shopping malls, cruise ships, and salons is troubling since consumers have little or no assurance regarding the safety of product ingredients, doses or the professional qualifications of individuals employed in these non-dental settings,” the letter states." Read more about it here.

View a recent ABC video showing uninformed mall kiosks


Known Teeth Whitening Kiosk Businesses:
BleachBright
LightSpa
Da Vinci Whitening System
iSmile
iBrite
Laser Bright
iBriteExpress
WhiteSmileUSA
Whitening USA
Beacming White
WOW Smile Xpress
ShineWhite
XpresSmile
Glitzz
Beaming White
SpaWhite
Brite Impressions
Laser White Express

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Online Teeth Whitening Scams





Last Updated 11/16/2010
The word "scam" is defined as: obtaining money by means of deception - and today you can find dozens of scams online - especially surrounding the field of over-the-counter teeth whitening. TeethWhiteningReviews.com (TWR) has just concluded an investigation into this marketplace and found that companies looking to make a fast buck often invent fake personalities, reviews and testimonials to convince you their product is the real deal and worth the inflated (or unreasonably discounted) price you're paying. 

In the unregulated, international world of Internet business, it is very easy for illicit marketers to start a private label teeth whitening business - without having to prove they've met any standards for safety or effectiveness. There are numerous manufacturers in China and elsewhere selling OEM whitening products at prices substantially less than their American or European counterparts. These products are not FDA-certified and are largely untested for efficacy. Would you really trust a whitening product that was made in the same country that created toxic toothpasteand melamine milk?

The Phony Review Website


One of the most common tricks used to build credibility for useless products is the fake review website. Scamsters create their own websites devoted to reviews of whitening products - and publish phony reviews, tests and claims - under the guise of objective Internet journalism. Some of the false testominoal/blog sties will even check your location via IP address, then plug your city in the testimonial (i.e. Cathy from Your City, Your State).

At one point, TWR was contacted by the makers of Vibrant White to remove their "scam" status on our website. The makers of Vibrant White were placed on our watch list because we found them to sponsor a website showcasing Vibrant White reviews. When we asked them to provide proof they had no affiliation with http://www.top-teeth-whitening-reviews[dot]com, they responded,

"Vibrant White does not have any affiliation with Top-Teeth-Whitening-Reviews.com. We were contacted several months ago by them and they had explained their review site to us, we shipped them several free pens to try in their experiment."

Subsequent investigation by TWR revealed that both the product and the review website were hosted on the same server and IP address, proving that both sites were under the management of the same company.

To date, TWR has found the following review and testimonial sites to be sponsored, created or published by manufacturers of undocumented whitening products:






- top-teeth-whitening-reviews.com

- teeth-whitening-reviews.com

- whiteningreview.com

- bestwhiteners.com

- best-teeth-whitening.com

- best-teeth-whitening.info

- best-teeth-whitening-guide.com

- whitener-reviews.com

- whiteningteethsolution.com

- teethwhiteningreview.com

- teethwhiteningdigest.com

- teethwhiteningreviews.net

- teethwhiteningreviewsguide.com

- teethwhiteningwarning.com

- teethwhiteningreviewed.com

- teethwhitening-expert.com

- theteethwhiteningreview.com

- TeethWhiteningFromHome.com

- Whitening-Review.info

- the-teeth-whitening-review.com

- TeethWhitenReview2009.com

- TopTeethWhiteners2009.com

- newteethwhitening2010.com

- theteethwhitenerreview.com

- teethwhiteningsteps.com

- teethwhiteningcritics.com

- teethwhiteningthatworks.com

- teeth-whiteners-compared.com

- teethwhitening-reviews.info

- teeth-whitening-truth.com

- teethtruthsquad.com

- whitener-reviews.com

- TopConsumerReviews.com

- consumersgazette.com

- thewhiteningcenter.com

- adultteethwhitening.com

- heatherswhiteteeth.com

- blog.jennyswhiteteeth.com
- sarahswhiteteeth.com

- sarahscleanteeth.com

- brendaswhiteteeth.com

- tanyasteeth.com

- cathysteethtrick.com

- amandasteeth.com

- beckyswhiteteeth.com

- elliesteeth.com

- suzysteeth.com

- blog.christineswhiteteeth.com

- how-to-whiten-teeth.com

- laurasteeth.com

- lorrainesteeth.com

- rockmyteeth.com

- lisaswhitesmile.com

- my-white-teeth.com

- amysteeth.com

- amysbrightsmile.com

- amandasteeth.com

- rachelteethwhitening.com

- rachelsteethblog.com

- janasteeth.com

- kellyswhiteteeth.com

- kaylaswhiteteeth.com

- karenswhiteteeth.com

- myteeth.org

- ws6alert.com

- news11daily.com

- healthreportweekly.com

- news28online.com

- news11-online.com

- dailyobserveronline.com

- usa-daily-herald.com

- consumer-weekly.com

- usachroniclestoday.com

- thedailychronicle.net

- homewhiteningcare.org


Last Minute Update


Watch your credit card statements! If you have purchased whitening products from an unknown source, be aware that TWR is also receiving reports of unauthorized charges from third-party partners of phony whitening manufacturers. 

Conclusion


An effective whitening product can make a dramatic difference in your smile. And not all online whitening sites are scams, but it can be very difficult to know because of the suspicious marketing tactics that many of these companies use. To ensure you are getting a quality product, stick with over-the-counter brand names you recognize or visit your dentist (not mall kiosks) for professional in-office or take-home teeth whitening.

Online Brands To Avoid
BriteWhite (Extreme BriteWhite)
Dentech Whitening
Dazzle White
Dazzle White Now
Dazzle Smile
EverBright Smiles
Cleanwhites
Celebrity Sexy Teeth
Celebrity Sexy White
Celebrity Smile
Ivory White
Lucent Whites
Luminous Brites
Movie Star Look
OrthoWhite
Premium White
True Color Whitener
NutraBrite
Vibrant White
Whitening Now
Easy White
Alta White
Teeth Whitening Pro
Whitening Brites
Ivory Brites
DentaWhite (Denta Whtie)
RemBright
Brite Teeth Pro (Bright Teeth Pro)
Shimmering White
Super Smile White
White Blast
ZaaZoom White
BellaBrite
Ivory Smiles
Max White Teeth
Smart White
Bridal Beauty White
South Beach Smile
AllDayBright (All Day Bright)
ezBrightPRO
True White
Pure White Smile
UltraWhite Smile
Ultra Whites
BrightWhites
SuperStar Smile
Dramatic Smiles
Smile Radiance
Vivid White Smile
Malibu Bright
Illumibrite
TeethID
InstaWhite
Gleamify
EZBright
TeethBrilliant
Smile4You (Smile 4 You)

TWR lists its most recent findings in the reviews section of this site. It will be frequently updated as we receive reports from contributors.

Additional Information
The Better Business Bureau posted a warning about online teeth whitening scams after we published this article. Read the full article here

What Shade Are Your Teeth? Teeth Whitening Shades Explained



If you've been thinking about whitening your teeth with a dentist, some of the first things he or she will want to do are: determine the existing color of your teeth, whether or not you're a candidate for whitening and how white your teeth may be bleached. All of this, of course, depends on being able to describe the color of your teeth as they appear now.

Years ago, there was no standard way for dentists to describe the color of a patient's teeth - let alone communicate it to patients or porcelain manufacturers to ensure a match and a normal-looking smile. But with the growing popularity of cosmetic dentistry, the business of "shade management" is alive and well - and finding ever more sophisticated ways of identifying and communicating tooth color.

Hue, Chroma, and Value


While today's dental schools (and manufacturers of shade management systems) are now discussing tooth coloration and its identification in much more detail, the basics have been taught for years. Known as the Munsell method, all tooth colors are based on three criteria: hue, chroma and value.

Hue - is the underlying color of existing teeth compared to color groupings of brown, yellow, grey and reddish-grey.

Chroma - is the intensity of the underlying color

Value - is the black/white value of a tooth's appearance, or how bright it appears to be.

Dr. Shane Vania of Boise, Idaho states, "When I evaluate somebody's teeth for whitening, I first look at the hue and that tells me whether or not the whitening will have a good effect."

So, if you can whiten your teeth, how white will they be? Results are subject to their existing undertone. According to the American Dental Association, people who have a yellow undertone have higher degrees of whitening success than people with a brownish undertone. For people with gray undertones, however, there's some disappointing news. These teeth are generally the least responsive when it comes to bleaching. 

A Master Plan


But how white is white for your particular teeth? To determine the coloration of your teeth, your dentist will most likely utilize a shade management system. Today's shade management systems are based on either visual observation or digital matching criteria, an up-and-coming technology, especially in the areas of veneers and restorations. Shade management systems are critical because they let your dentist communicate the color of your teeth to staff members and refer to it when selecting whitening options for you. With a shade management system, your dentist can also show you the color of your teeth now - and your expected whitening results.

If your dentist is using a visual observation system, chances are he's relying on a "shade guide". A shade guide features differently shaded ceramic reproductions of individual teeth, grouped together and labeled for referral and categorization.

The most commonly used shade guides are made by Vita and are available in three basic styles: Vita Basic or Classic Shade Guides, the Vitapan 3-D Master® Shade Guide and the Extended Shade Guide for use when determining optimal shades for whitening.

The Vita Classic Shade Guide is really two guides - one guide is used to determine hue and chroma (in that order), while a separate guide is used to determine value. With The Vita Classic Shade Guide, the shade tabs or teeth reproductions are shown in groups of similar hues within the holder. The A shades are brown, B shades are yellow, C shades are grey and the D shades reddish-grey. A tooth's chroma (or color intensity) is then identified with a number from 1-4. To determine the value (or brightness) of a tooth, a value shade guide is needed. 

The Vitapan 3-D Master® Shade Guide system consists of 11 sets of fired porcelain tooth-shaped samples. The 11 sets consist of 26 shade tabs ranging from lightest to darkest value, from lowest to highest intensity and from yellow to red. Samples are arranged in groups of two or three that form five sets (numbered 1 through 5). Each set represents a single value, 1 being the lightest tooth color and 5 the darkest. 

Chroma and hue are represented within each value set. Using this guide, the value, or lightness, of the tooth color is the first selection made by the dentist. The chroma, or color saturation, is identified next by determining which of the hues in the group matches the tooth color. The hue is identified by selecting the color samples to the right or left of the M (median) hue (right indicates R and left indicates L tones in the tooth color).

The Vita Bleachguide 3D-Master® offers dentist a look at 15 bleached shades of teeth to help determine precise targets for whitening procedures, including a superior way to determine a patient's exact results based on hue, value and chroma. To distinquish the Bleachguide from the other Vita guides, bleached shades are described with a three-number ID code to establish their numerical classification, as in: 010, B020, B030, B040 etc.

While Vita is only one of many manufacturers of shade guides, they are generally considered to be the leader in this technology. Vita is now also developing products and systems to assist with digital color matching - considered to be the future of cosmetic dentistry.

The Digital Revolution


Despite a controversy involving its effectiveness, digital technology is being pursued by both manufacturers and dentists who are looking for even more precise ways to determine a tooth's existing color - and its potential for bleaching and other cosmetic procedures.

With digital technology, a hand-held "digital shade-taking device" is held up to the tooth, and by using artificial vision technology, a scanning unit measures, maps and communicates the essential parameters of the tooth color to a computing source. Digital Shading allows for a constant and accurate feed of light source on the tooth at all times. In return, the outcome is a standard color because the light source is being generated directly from the shade-taking device. There is the same light illumination at all times, allowing equipment makers to standardize the color for a much better interpretation. Once the picture of the tooth is taken, it is saved, uploaded and printed out. A colorimeter, the software inside of the scanner, determines the color. The entire process from start to finish is done in less than one minute. Not only does this method make identifying shades objective and consistent, it allows for a digital record of shades.

Getting the Right Match


  • If you know you're seeking a whitening consultation, dress in neutral colors. Strong colors can reflect on to the surface of your teeth - making a match more difficult.

  • Don't wear heavy facial make-up or lipstick - again, this can confuse the dentist's perception.

  • Clean your teeth well the day of your appointment.

  • Ask your dentist to perform the match at the beginning of your session so he or she can avoid eye fatigue

  • Make sure the walls of your exam room are a neutral color and that the dentist looks at your teeth at eye level to assure the best results.

  • If you are unsure about how white you should go or how it might look, try out our teeth whitening simulator for the iPhone.