I'm a dentist. Sorry a bit late to this thread. There is still a lot of misinformation and misunderstanding surrounding tooth whitening procedures and regulations in the UK. This GDC ( general dental council) statement might help to clarify the position-
https://www.gdc-uk.org/docs/default-source/what-is-the-legal-position/tooth-whitening-position-statement.pdf
In short, be careful. You are messing around with your body, and whilst yes, the majority of tooth whitening is a relatively safe process, there are times when the procedure can go wrong, especially if you are using unregulated chemicals in your mouth.
Who would do that? Why would you take the risk? At least if properly prescribed by a dentist, they can supervise, and have the skills to deal with problems if something goes wrong.
In my long career, I have seen as a result of misuse of these chemicals- burnt and blistered gums and soft tissues, ulcerated, painful and necrotic. In some cases there were lasting scars.
I have seen permanent erosion/resorption of the enamel from overuse of chemicals that are too strong. The patients eventually needed more extensive crown work and in one case the teeth needed to be removed.
I've seen cases where in their naivety, a patient whitened their teeth but didn't realise the crowns and anterior fillings wouldn't whiten and ended up a costly fix to even out the colour.
I've seen patients develop permanent sensitivity, again as a result of unsupervised "treatment"
To address the PP's above who have suggested various forms of hydrogen peroxide formulas such as mouthwash on their teeth. Please don't. Unless it's a registered product it's unclear what you are attempting to do. The whiteness you might achieve is from
Dehydration of the tissues and will revert to original colour.
The custom made mouthguard are custom made for a reason. They are constructed to contain a reservoir to place the gel in safely, and a dam to stop excess product escaping into your mouth.
There are different formulae for day and nighttime whitening. The chairside "Zoom" whitening is personally a waste of my time, as I find those patients require top up trays anyway.
I trained for 5 years to become a dentist, plus I have over twenty years post graduate experience and training in this topic.
The orginal OP -"
She makes a mould and then gives you 2-3 tubes of some paste? Doesn’t seem a service in need of such expensive and long training and such a high fee - any other ways of doing this?
This is so insulting. Who is going to look after you when your teeth start to get sensitive or start to erode away? Who is going to look after you when your make your own moulds fall down or cause ulceration or occlusal trauma due to being ill fitting? Who is going to look after you when your diy chemicals start to cause pits and grooves in your enamel? Who is going to look after you when the chemicals on your teeth burn your gums?
Yes. You could be lucky and have a successful experience. But why would you mess with your body like that?
It's a bit like ordering a Covid vaccine over the internet.