The day the braces come off is the best of the whole journey. It is also the day when the part of the result that lasts over time is decided.
Why teeth drift back
It is not a flaw in the treatment: it is biology. Around the roots there are elastic fibres that were stretched during movement and that slowly tend to reorganise. Bone needs months to stabilise in its new configuration. In the meantime, if nothing holds the teeth, they tend to move back towards their previous position.
Add to this a fact that applies to everyone, even those who never wore braces: teeth shift slowly throughout life.
What the evidence says
The Cochrane review on retention procedures confirms that some form of retention is needed to maintain the position achieved. On comparisons between different protocols the evidence is less clear-cut: no single scheme proves superior for everyone, which is why the choice must be calibrated to the case.
The two main types
- Fixed retainer — a thin wire bonded to the inner surface of the front teeth. It is invisible, requires no cooperation and works permanently. In exchange it demands more care with hygiene: tartar builds up easily under the wire, and floss with a threader or an interdental brush is needed.
- Removable retainer — a clear tray worn according to the prescribed schedule, usually at night. It does not complicate hygiene, but it works exactly as much as you wear it.
They are often used together: fixed on the lower front teeth, removable on the upper arch.
For how long
This is the real question. The honest answer is: far longer than most people expect. After a more intensive initial phase you generally move to reduced night-time wear, maintained over time. It is not a punishment: it is a very low price for not having to do it all again.
What to do (and not do)
- Wear your retainer according to the schedule we give you, not «by feel».
- If the tray no longer fits or is hard to seat, do not force it: call us. It means something has moved, and the sooner we act the simpler it is.
- If the fixed wire debonds even at a single point, book an appointment: a partially detached wire can move teeth instead of holding them.
- At periodic check-ups remember to have the retainer checked too, not just decay and hygiene.
Sources
- Cochrane — Retention procedures for stabilising tooth position after orthodontic braces — the need for retention and comparison between protocols.
- Italian Ministry of Health — Dental health — periodic check-ups after treatment.