Cosmetic dentistry is the corner of the profession that advertises. Whitening deals, aligner plans with before-and-after grids, finance from so much a month. None of that tells you the thing you need to know, which is whether the people behind the offer are careful. A cosmetic result lives in your mouth for years, so the practice deserves more scrutiny than the price.
The first test comes before any treatment: a genuine consultation examines you before it sells to you. Whitening on gums that bleed, or aligners on a mouth with untreated decay, is bad dentistry however good the photos, so a careful clinician checks the health of your teeth and gums first and deals with problems before cosmetics. Expect an honest conversation about what your teeth can and cannot achieve, since whitening lightens natural teeth but not crowns, veneers or fillings, which is exactly the kind of limitation a careful practice raises unprompted and a sales operation leaves for you to discover afterwards.
Expect also to hear about downsides. Sensitivity during whitening is common and usually temporary; alignment takes months and ends with retainers you must keep wearing at night if you want to keep the result. A consultation with no mention of any drawback is an advert.
Ask who will carry out and supervise the treatment, and check the name on the General Dental Council register, which is public and free to search. Tooth whitening is legally dentistry in the UK, which is why a beautician's price list is not a comparison. Ask what happens if the result disappoints or something goes wrong mid-course, and whether review appointments are included in the price or charged on top. And ask for the full cost in writing before you commit, including retainers, since a treatment plan with numbers on it is the difference between a quote and a conversation.
The advertised price is the start of the comparison, not the end of it. Two practices quoting similar figures may differ on everything above, and the ten minutes of questions cost nothing. Among the 3,025 dental practices listed on this site, listings show which offer cosmetic treatments alongside general dentistry, which matters because a practice that also does your check-ups has a stake in the health underneath the smile. Compare practices offering cosmetic work near you, then set out what you want and gather quotes so the numbers arrive in comparable form.
Book two consultations, not one. The second opinion either confirms the first, which buys peace of mind, or contradicts it, which is worth knowing before the money moves. Either way you learn more from the comparison than from any before-and-after grid.