Opalescence15% - Gel Syringes Teeth Whitening Refill Kit - Low Sensivity (4 Packs / 8 Syringes) - Carbamide Peroxide - Cool Mint- Made in The USA by Ultradent - Tooth Whitening 5195-4

Edit/Edit - It took me almost a month of almost nightly whitening to get to my desired shade, so in total of 6 syringes of 10% carbamide. I'm too lazy to share before/after photos. I'll stick with buying this product for all maintenance whitenings going forward. I'm going to finish off the last two tubes to see how close to optic piano-key white I can get with 8 syringes.Edit: After an initial 5 nights of whitening my teeth were pretty white, but part of this was due to the teeth being dehydrated (and thus more sensitive). When you take a break for 1-2 days the teeth yellow a bit as the teeth rehydrate. So I started on another regimen, and am now on the 5th night of the second round, with 0.33 in 1 tube out of a total of 4 syringes used over 14 calendar days. Now I want to keep going to see if I can make my teeth look like piano keys.These work very well in your clear retainers. No need to purchase a separate custom whitening tray just for this. Check out the YT videos on how much to actually apply to each tooth-- it's just a small bead needed to the front of each tooth. I don't express a whole line of gel across the arch, this would be too much product.Also be aware that this is a perishable product. When I received the package, it had a remaining shelf life of 6 months. After, the gel loses efficacy. It doesn't drop to zero after this date, but just something to note. Amazon comped me an additional 8 syringes at no charge when I asked about the short shelf life.Start with buying 2 packs / 4 tubes of 10% Opalescence carbamide. I bought 4 packs / 8 tubes and there's no way I can get through all this stuff. I used only 1.75 tubes doing upper and lower arches for 6 nights and got to a very nice white shade, and any more my teeth would start to look like piano keys. I would've had to start from a much darker yellow shade in order to actually use up 4 tubes and go through two whole weeks of nightly whitening. And perhaps my teeth are more sensitive than others-- Definitely glad I started with 10% carbamide and not anything higher. By the 4th or 5th night I was starting to notice increased sensitivity, despite me having brushed with Sensodyne multiple times a day, every day for over a month prior. I also had braces removed a week ago, and experienced zero sensitivity during that procedure, for reference.

I wasted a lot of money on a cheaper brand you can find on here (rhymes with MyShmile) for it to only whiten my teeth by a hair. This was even with their 35% gel and over week of treatments. It probably whitened by half a shade if at all. I should have just splurged on the Opalescent to begin with, because it would have saved me a lot of time and money. I'm an idiot for not taking a before, but it actually got my teeth noticeable whiter (beyond a doubt) on day 7.One thing I love is that if you have natural vampire fangs like me, whitening them makes them look a little more sharp and pointy. That was a pleasant surprise I wasn't expecting. I think it's because the white contrasts with your skin and the shadows in your mouth.Before you buy this, please be aware that you can severely burn your mouth and gums if you aren't careful with this stuff. Your enamel is strong enough to withstand it, but your flesh isn't. If you don't have the custom trays like me, I reccomend using a cheek retractor while painting each individual tooth with the syringe. This will also help to keep saliva away from the teeth/gel as it can deactivate the peroxide somewhat and won't be as effective. If the gel makes you drool like me and you want to further protect from saliva, tuck some cotton balls under your tongue and beside your back molars to absorb the moisture. Also tuck a towel under your chin like a bib. It's a learning curve to apply without the tray, but you get used to it.

35% bleach is very high but doesn't burn. Trays somewhat hard to fit but hold the bleach well. Due to the high dose it is left in for1 hour but whitens well, without leaving in over night. Highly recommend for home bleaching.

Recently I decided to take care of my oral and dental hygiene. After visiting the dentist and having some fillings carried out I asked him whether my teeth could be whitened and how much the cost was. He replied yes and the bill was around £300! Not exactly small potatoes.Whilst I had no inclination whether the price was reasonable at the time I decided to do some research and try out certain products.I have tried the Crest strips a year or so ago and unfortunately they did very little after buying 2 weeks worth supplies and whitening every day.Upon further research it was mentioned that the active agent would be neutralized with saliva so the whitening effect wouldn't be as effective as a professional job. All it would do is froth up in your mouth and not produce noticeable results.This led me to having custom dental trays made from Ebay where they send you some putty for you to make a mould of your teeth and you send it back for them to make custom dental trays.I then ordered some Opalescence 35% from Amazon USA. EU laws unfortunately require anything over 0.1% Hydrogen Peroxide can only be carried out by dentists so I was forced to take that route.Not knowing how much I would need I just bought a 3 pack. Each pack contains 4 syringes. Also since I was going to get stung by customs which I paid for in advance during checkout I took the gamble and bought extra just in case they gave good results.In order to quantify any difference I bought a basic tooth shade guide of Ebay.I started of at a shade 9-10 (My teeth still had intrinsic tar stains from my smoking days and heavy tea stains. We Brits love tea)I finished at a shade of 2 (I only used 5 syringes to get this result. Amazing! Dazzling! Very Joey Essex lol). I decided that this was bright/white enough. Anymore then I would look like Ross from Friends.Please bear in mind monitors and taking camera pictures may distort the colours. I did not add any extra artificial effects, ISO were the same, no exposure was added but due to the difference in lighting the F stops may have been different. Pictures were taken 5 days after whitening treatment so there is no dehydration on the teeth which produce fake whiter results.I was able to use one syringe to do two treatments which I did every second day if my gums needed time to heal or my teeth were too sensitive.Prior to receiving the Opalescence I rubbed vitamin E oil onto my gums, twice a day.As long as you don't overfill the dental trays there should be minimal "spillage" onto the gums that cause chemical burn.I did find that my gums went white when spillage happened and it did cause chemical burn but it healed after a day. My pain threshold is quite high so I was able to bear it but I did give time to heal until I started treatment again.The whitening agent I could hear gently fizzing away slightly during treatment so I knew that it was doing it's magic.Common sense is just involved, if gums hurt then give it time to heal and using vitamin E which is an anti inflammatory does wonders.My whitening treatment contained 35% carbamide peroxide which is around 14% hydrogen peroxide so if it causes excessive pain then reduce the treatment time. I could only bear 30 mins at the beginning but after the second syringe I was able to withstand an hour session. The longer the whitening agent stays on your teeth the more it will be able to break down the bonds of molecules that cause stain.To combat the inevitable tooth sensitivity I used GC tooth moose which also remineralizes teeth and brushed my teeth with Biorepair plus toothpaste. Sensodyne Pronamel works equally well in repairing enamel.Things like Blue plasma lights are a placebo. They do nothing and research has proved it. You can buy a cheap one from Ebay for £3 for psychological assurance but trust me not worth wasting money on (I bought one and it did nothing).I have 6 syringes left and plenty to retouch my teeth over the year or longer to maintain brightness/whiteness.Overall I am very pleased with the outcome but would advise that anyone who wants to go down the DIY route sees a Dental professional first during their checkup and ask whether their teeth is in good condition for whitening treatment.Edit on Novermber 12th 2016.This product has a shelf life of 2 years if refrigerated. I came back to re-do my whitening after 11 months and the potency of the product has reduced greatly from when I first bought it. They were kept refrigerated as specified but don't seem to work as well as when I first received them. So buyer beware if you intend to buy in bulk and store them.