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  • #31
    Originally posted by deepmar View Post
    Tried the same thing but only did one box and got no results.

    I do crest whitening strips all the time, and they work great for me! Also, I use the Listerine pre-wash whitening, I love both of those products!
    www.sexynutrition.com

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    • #32
      The white strips seem to work on some of my patients but not others.

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      • #33
        I found the exact same shit they use in office on ebay from a 3rd party dist for a FRACTION of the cost. In office for the light treated perdoxides can run $300-500 or more. I bought 2 tubes of the same gel and a custom small light for $30. It works!

        Crazy your paying all that to be a "dentist" do it and insurance wont cover it? Hell NAW!

        http://www.perfectlywhite.com but i got them from ebay.

        35% Carbamide Peroxide gel is stronger than ANYTHING you will find OTC in the USA products. Only in office uses that normally. Those OTC strips 90% are low dosed and crap anyways.

        I know a guy who is an actor. He uses the GO SMILE
        system. It works because his teeth are perfectly white. And he has to keep them that way for work: print ads and movies. Its OTC.
        "You told Harpo to beat me" - Color Purple

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        • #34
          Just remember everyone is different and it may work on you and may not that is why we carry so many different brands with different active ingridents.

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          • #35
            The place where I tan sells "Hollywood Smile". It comes with 5 applications and a thingy to keep your lips peeled back so the UV rays of the bed help whiten. $20. I've used 3 of the applications so far and can see a big difference.
            hardcoregymregistry.com * prettybuff.com * myspace.com/sallyagin

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            • #36
              gel for trays

              If you want a very good product, the brand is under dental hygienics.. It a whitening gel that starts at 10% up to 21%.. Its a very good product and you can get thru your dentist for about 30 dollars.. Let me know if you want more info on it... take care..

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              • #37
                Originally posted by KelliJo14 View Post
                I do crest whitening strips all the time, and they work great for me! Also, I use the Listerine pre-wash whitening, I love both of those products!
                Well give the pre wash a try it sounds like a good idea.

                Originally posted by jlgiller View Post
                The white strips seem to work on some of my patients but not others.
                probably why it didnt' work for me.

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                • #38
                  Originally posted by jlgiller View Post
                  Where have you gotten your information?
                  There are countless other publications... here's one on 35%, which seems popular on this forum.

                  Dental Materials, Volume 23, Issue 7, Pages 900-904
                  Thirty-five percent carbamide peroxide application causes in vitro demineralization of enamel

                  Neslihan Efeoglua, David J. Woodb and Candan Efeogluc

                  aDepartment of Fixed & Removable Prosthodontics, Level 6 Worsley Building, Leeds Dental Institute, University of Leeds, Clarendon Way, Leeds LS2 9LU, UK

                  bDepartment of Oral Biology, Leeds Dental Institute, University of Leeds, Clarendon Way, Leeds LS2 9LU, UK

                  cDepartment of Oral & Maxillofacial Surgery, Leeds Dental Institute, University of Leeds, Clarendon Way, Leeds LS2 9LU, UK

                  Abstract

                  Objectives

                  The objective of this in vitro study was to investigate whether a high concentration in-office bleaching agent affected the mineral content of enamel and dentin.

                  Methods

                  A commercially available 35% carbamide peroxide bleaching agent was applied for 2 h to sectioned teeth (n = 11). Specimens were then immersed in artificial saliva at 37 C for a further 24 h to simulate the oral environment. Tomographic images of these sections were obtained (micro-CT 80, Scanco, Switzerland) prior to and post-bleach application. Eight three-dimensional regions of interest (ROI), starting from the enamel surface extending to the dentinoenamel junction, were selected for each section. The hydroxyapatite equivalent mineral concentrations (g/cm3) of the ROIs were calculated. Any changes in mineral content as a consequence of the bleaching procedure were calculated in relation to each ROI.

                  Results

                  There was a significant reduction in the mineral content of enamel specimens post-bleach application extending to a depth of 250 μm (paired t-test, p < 0.05); this reduction in mineral content was greatest in the ROI's closest to the tooth surface. There was, however, no significant difference in the mineral content of dentin as a consequence of bleaching.

                  Significance

                  This in vitro study has shown that significant demineralization of enamel occurred following bleaching with 35% carbamide peroxide. The concept that in-office bleaching is a non-destructive cosmetic procedure should be reconsidered.

                  Keywords: Carbamide peroxide; Bleaching; Enamel; Dentin; Micro-computerized tomography; Demineralization; Power bleaching; In-office bleaching; In vitro

                  Copyright 2006 Academy of Dental Materials Published by Elsevier Ltd.

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                  • #39
                    Here's another...

                    SADJ. 2008 Jun;63(5):282-4, 286.Links
                    Effect of four different opalescence tooth-whitening products on enamel microhardness.

                    Majeed A, Grobler SR, Moola MH, Rossouw RJ, van Kotze TJ.
                    Oral and Dental Research Institute, Faculty of Dentistry, University of the Western Cape, Tygerberg, South Africa.

                    OBJECTIVES: The purpose was to evaluate the effect of various Opalescence tooth-whitening products on enamel. METHODS AND MATERIALS: Enamel blocks were exposed to Opalescence PF 10% Carbamide Peroxide (n = 10), Opalescence PF 20% Carbamide Peroxide (n = 10), Opalescence Trswhite Supreme 10% Hydrogen Peroxide (n = 10) and Opalescence Quick PF 45% Carbamide Peroxide (n = 10) according to the manufacturer's instructions. The control group was enamel blocks (n = 10) kept in artificial saliva. The values were obtained before exposure and after the 14-days treatment period. Enamel blocks were kept in saliva between treatments. Indent marks on enamel blocks were examined using the scanning electron microscope for treatment effects. RESULTS: All four different Opalescence products damaged enamel. The most damage was done when treated for a long period (112 hours). SEM images also showed damage to enamel by all 4 products. Opalescence with 10% and with 20% Carbamide Peroxide showed the highest damage, which also differed significantly (p < 0.05) from the saliva control group (p < 0.05; Tukey-Kramer Multiple comparison test). CONCLUSION: All 4 Opalescence products damaged enamel. Higher damage was done by the 10% carbamide peroxide and 20% carbamide peroxide products because of the much longer exposure period (112 hours in comparison to 7 hours).

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                    • #40
                      Here's a publication that will be published in March 2009:

                      Journal of Dentistry
                      Volume 37, Issue 3, March 2009, Pages 185-190

                      Effect of home bleaching systems on enamel nanohardness and elastic modulus

                      Shereen S. Azera , Camilo Machadoa, Eliana Sanchezb and Robert Rashida

                      aDivision of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH, USA

                      bDivision of Primary Care, The Ohio State University College of Dentistry, Columbus, OH, USA

                      Objectives

                      The purpose of this study was to evaluate the nanohardness and elastic modulus of human enamel after treatment with tray and strip bleaching systems.

                      Methods

                      Fifty-five human enamel samples were exposed to five different bleaching agents. Nanoindentations were made before and after bleaching treatments following the manufacturer's directions using a Nanoindenter XP (MTS Systems Corporation, Oak Ridge, TN, USA). Nanohardness and elastic modulus measurements were obtained and the results were statistically analyzed using a repeated measures analysis of variance with a post-hoc Tukey–Kramer multiple comparison test.

                      Results

                      Nanohardness and elastic modulus measurements showed decrease of mean values for each group except the control which remained the same. There were significant differences due to time (before and after treatment) and material effects in nanohardness (P < 0.0001) and elastic modulus (P = 0.0241). Measurements after treatment showed significant decrease in nanohardness between all groups and the control group. There was a significant difference in hardness between CP and TO after treatment. Additionally, there were significant differences in elastic modulus between the control group when compared to OB and TO after treatment. While there were significant changes in the elastic modulus due to treatment for both CP and TO, there were no significant differences between any of the groups after treatment.

                      Conclusions

                      Nanohardness and elastic modulus of human enamel were significantly decreased after the application of home-bleaching systems.

                      Keywords: Tooth bleaching; Tooth whitening; Enamel nanohardness; Enamel elastic modulus; Bleaching trays; Whitening strips

                      Copyright 2006 Academy of Dental Materials Published by Elsevier Ltd.
                      I was going to post the entire publication (PDF), but the attachment function doesn't support PDFs.

                      This is from the fulltext:

                      Within the limitations of this study it was concluded that the
                      nanohardness and elastic modulus of human enamel were
                      significantly decreased after the application of over the
                      counter home-bleaching systems as well as professionally
                      supervised home bleaching agents.
                      Last edited by sherwin; February 8th, 2009, 09:41 AM.

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                      • #41
                        Teeth Whitening Sy

                        Tooth whitening can be a very effective way of lightening the natural colour of your teeth without removing any of the tooth surface. It cannot make a complete colour change, but it may lighten the existing shade. ‘Laser whitening', it is not a laser that is used. Gel is painted onto teeth and then a light is shone onto the gel to speed up the whitening reaction.
                        .

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