Invisalign or fixed braces? How to decide
If you have been thinking about straightening your teeth, you have probably narrowed it down to two options: clear aligners or traditional fixed braces. Both work. They just work differently, and the right choice depends on your teeth, your routine and what you are trying to achieve.
Here is a plain explanation of how they compare.
How each one works
Fixed braces use brackets bonded to the teeth and a wire that is adjusted at each visit. They stay on for the whole of treatment.
Invisalign® clear aligners are a series of removable, transparent trays, each worn for a set period before you move to the next in the series. Small tooth-coloured attachments are usually bonded to some teeth to help specific movements, and these are removed at the end.
The practical differences
Appearance. Aligners are far less noticeable than metal brackets, which is the main reason most adults ask about them.
Eating. Aligners come out to eat, so there are no food restrictions. Fixed braces rule out hard and sticky foods for the duration.
Cleaning. Brushing and flossing is easier with aligners because you remove them. Fixed braces need more effort and more attention around the brackets.
Discipline. This is the one people underestimate. Aligners only work while they are in your mouth, and they need to be worn for around 20 to 22 hours a day. Fixed braces work whether you remember them or not. If you know you would leave them out, that matters.
Appointments. Both need regular reviews. Neither is a fit-and-forget treatment.
Which cases suit which
Clear aligners handle a wide range of cases, including crowding, spacing and many bite problems. Some cases — particularly complex bite corrections, significant jaw discrepancies, or teeth needing large positional changes — may be better treated with fixed appliances, or may need a referral.
Nobody can tell you which applies to you from a photograph or an online quiz. It needs a clinical examination, and usually X-rays and a scan. That assessment is the point of a consultation, and it is where you should get a straight answer about whether a treatment is realistic for your case.
Retainers apply either way
Whichever route you take, teeth have a natural tendency to move back towards their original position. Retainers are needed after treatment, indefinitely, to hold the result. Any provider who does not raise retention with you before you start is not giving you the full picture. We include removable retainers with Invisalign treatment here.
What about cost?
Clear aligner treatment and fixed brace treatment are broadly comparable in private practice, and the figure depends on the complexity of the case rather than the brand on the box. Our current fees, including Invisalign treatment, are published in full on our fees page .
Payment plans are available through our finance partner .
Common questions
Does it hurt?
You can expect some tightness or tenderness for a day or two after changing to a new aligner or after a brace adjustment. Most people describe it as pressure rather than pain, and it settles.
Will it affect my speech?
Aligners can cause a slight lisp at first. It usually settles within a week or two as you adjust.
How long does treatment take?
It varies considerably with the complexity of the case and how consistently aligners are worn. You will be given an estimate for your own case after assessment, and it is an estimate rather than a guarantee.
Can I whiten my teeth as well?
Often yes, usually after alignment is complete. We cover this in our separate article on tooth whitening .
Talk it through
We provide Invisalign clear aligner treatment at our practice on Bridge Street in the centre of Leighton Buzzard, and we see patients from Linslade, Heath and Reach, Dunstable, Wing and the surrounding villages.
If you would like to know which option suits your teeth, book a consultation and we will assess it properly and set out the realistic options, including doing nothing.
Book a consultation
We will assess your teeth properly and tell you what is realistic — including if treatment is not the right answer.
This article is general information and is not a diagnosis or a recommendation for treatment. No two cases are the same, and suitability for any treatment can only be established following a clinical examination. Results vary between individuals and cannot be guaranteed.
Written and reviewed by the clinical team at Bridge Street Dental Practice, 17a Bridge Street, Leighton Buzzard, LU7 1AH. Telephone 01525 376675. Our clinicians are registered with the General Dental Council and the practice is registered with the Care Quality Commission.
Last reviewed: 18 August 2026
