Invisalign and Braces

HOW FIXED BRACES WORK

Small brackets are bonded to the front of each tooth and connected by a wire. The wire is shaped to a planned curve and, as it tries to return to that shape, it carries the teeth with it. The wire is changed or adjusted periodically as treatment progresses.

Metal braces are the standard and the most widely used. They are the most efficient at complex movements and generally the least expensive option.

Ceramic braces work identically but use tooth-coloured or clear brackets, so they are considerably less noticeable. They are slightly bulkier and more prone to breakage than metal, and the elastic ties can pick up stain between appointments.

Lingual braces are fitted to the inside surface of the teeth, so they are not visible at all from the front. They are custom-made, more technically demanding, and most people find the adjustment period — particularly for the tongue and speech — longer than with conventional braces.

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HOW CLEAR ALIGNERS WORK

Clear aligners are a series of thin, transparent, custom-made trays. Each one is shaped slightly differently from the last, and wearing them in sequence moves the teeth in small increments towards the planned result.

Invisalign is the best-known brand; there are several others, and they work on the same principle.

Each aligner is typically worn for one to two weeks before moving to the next, and the whole series is planned digitally from a scan of your teeth before treatment begins — which means you can usually see a simulation of the intended result at the outset.

Small tooth-coloured attachments are often bonded to some teeth. These give the aligner something to grip, so that it can perform movements it could not manage on a smooth tooth surface. They are removed at the end of treatment.

The critical point about aligners is wear time. They are usually prescribed for 20 to 22 hours a day, removed only for eating, drinking anything other than water, and cleaning. Treatment progresses only while they are in. This is the single biggest factor in whether aligner treatment finishes on plan, and it is entirely in the patient's hands.

 

WHAT EACH ONE DOES WELL

Fixed braces have the wider range. Because the bracket is bonded directly to the tooth, the orthodontist has precise three-dimensional control, including over movements that are difficult to achieve any other way — rotating a round tooth, moving a root rather than just the crown, closing large spaces, correcting significant bite discrepancies, and bringing down teeth that have not come through. They also work regardless of patient cooperation, because they cannot be taken out.

Clear aligners handle a great many cases very well, particularly mild to moderate crowding and spacing, relapse after previous orthodontic treatment, and alignment of the front teeth. Their range has widened considerably as the technology has developed, but there remain cases where fixed braces are the more predictable choice, and an orthodontist should tell you honestly which category yours falls into.

 

LIVING WITH EACH

With fixed braces you cannot take them out, which is both the advantage and the drawback. Cleaning takes longer and needs more care, because plaque accumulates readily around brackets. Certain foods are restricted — hard, sticky and chewy items that can break a bracket or bend a wire. Appointments are needed every few weeks for adjustments, and an occasional emergency visit for a broken bracket or a poking wire.

With aligners you remove them to eat, so there are no food restrictions and cleaning your teeth is unchanged. They are considerably less visible. In exchange, discipline is required: they must go back in immediately after every meal, and anything other than water must be drunk with them out. Appointments are usually less frequent, and many providers use remote monitoring between visits.

Both cause some discomfort when treatment begins and at each change — a dull ache and tenderness on biting for a day or two. Fixed braces can also rub the inside of the lips and cheeks in the first weeks, which wax relieves.

 

HOW LONG TREATMENT TAKES

It depends on what has to be moved, not on which appliance is used. Minor alignment may take a few months; comprehensive treatment involving the bite usually takes considerably longer.

A reliable estimate can only be given after a full assessment, including X-rays. Any estimate given from a photograph, before anyone has looked at the roots and the bone, is a guess.

 

RETAINERS — THE PART THAT IS NOT OPTIONAL

Teeth do not stay where they are put. The fibres around them and the ongoing changes of normal life both tend to pull them back, and relapse after orthodontic treatment is common where retainers are not worn.

Retainers come in two forms, and many patients have both:

Fixed retainers are a thin wire bonded behind the front teeth, permanently in place and invisible. They need checking periodically and cleaning around carefully.

Removable retainers are clear trays or plates, worn at night.

Retention is lifelong, not a few months. Wearing a retainer at night indefinitely is the normal expectation, and this is worth knowing before starting treatment rather than afterwards.

 

BEFORE ANY ORTHODONTIC TREATMENT

Teeth should be moved in a healthy mouth. Active decay and gum disease are treated first, because moving teeth in a mouth with untreated gum disease can accelerate bone loss.

Where gum disease has already caused bone loss, orthodontic treatment may still be possible but needs careful planning and close monitoring.

Some cases also need extractions to create space, and some need to be treated in combination with jaw surgery where the underlying problem is skeletal rather than dental.

 

QUESTIONS PATIENTS ASK

Am I too old for braces? No. Teeth can be moved at any age provided the gums and bone are healthy. A significant proportion of orthodontic patients are adults.

 

Are aligners as effective as braces? For many cases yes. For complex movements and significant bite correction, fixed braces remain more predictable. The honest answer depends on your case.

 

Does it hurt? There is aching and tenderness for a day or two at the start and after each adjustment or aligner change. Most people find ordinary painkillers sufficient and the discomfort reduces as treatment goes on.

 

Will braces damage my teeth? Not in themselves. The risks are decalcification — white marks where plaque has sat around a bracket — and gum inflammation, both of which are consequences of cleaning rather than of the appliance. Minor root shortening can occur and is usually of no consequence.

 

Can I whiten my teeth during treatment? Whitening is normally done after orthodontic treatment rather than during, so that the colour is even once brackets or attachments are removed.

 

What if I lose an aligner? Contact your orthodontist. Usually you go back to the previous aligner or move on to the next, depending on where you are in the sequence.

 

Can I have aligners if I have crowns or implants? Often yes, with planning. Implants do not move, which affects how the case is planned, and attachments bond less reliably to ceramic than to enamel.

 

How often are appointments needed? Fixed braces usually every few weeks; aligners typically less often. Both require in-person review, whatever remote monitoring is used alongside.

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