While it’s true that baby teeth are destined to fall out and be replaced by their adult counterparts, when they fall out too early, their absence can cause trouble down the line. Fortunately, space maintainers can keep your child’s teeth from shifting, so their smiles can continue to grow and develop as they should.
Baby teeth do two jobs. They let your child chew and speak, and they hold the position that the permanent tooth underneath will eventually take. When a baby tooth is lost long before its replacement is due — to decay, to an extraction, or to a knock on the playground — the teeth on either side start drifting into the empty space. By the time the permanent tooth arrives, its path can be gone.
A space maintainer is a small appliance that holds that gap open until the permanent tooth is ready. It does nothing clever and it does not move teeth; it simply stops the space from closing, which is often the difference between a straightforward eruption and years of orthodontic correction.
Timing decides it. A baby molar lost at five, with the permanent tooth years away, usually needs a maintainer. A tooth lost at ten, with its replacement already on the way, generally does not. The decision comes from an x-ray showing how far the permanent tooth has developed and how much space is at stake — not from a rule of thumb. Front baby teeth lost early are a different case again: they matter less for space than parents expect, and a maintainer is not always warranted.
Most are fixed, cemented to a neighbouring tooth so there is nothing for your child to remember or lose. A band-and-loop holds a single gap; other designs handle several missing teeth or hold a full arch. Removable versions exist but rely on a child actually wearing them. Your pediatric dentist and Dr. Tiffany Lu, our board-certified orthodontist, choose the design for the teeth involved and how long it needs to stay in — and because both work in this office, that is one conversation at one visit rather than a referral across town.
Fitting is straightforward: measurements are taken, the appliance is made, and it is cemented at a short visit. The first few days feel odd and your child's tongue will find it constantly — that settles. The real work is care. Brush around it thoroughly, since plaque collects where metal meets tooth, and skip sticky candy, gum, taffy and ice, which are what loosens appliances. If it feels loose, a wire is bent or something is poking, call us and we will see your child rather than have them wait — a maintainer that is not in place is not maintaining anything.
Until the permanent tooth is on its way, which can be months or a few years. We check it at every set of cleanings and exams, watch the erupting tooth on x-ray, and remove the appliance at the right moment — leaving it too long can get in the way of the very tooth it was protecting. If crowding still shows up as the arch develops, interceptive orthodontics is the next step, and the same team is already holding your child's history.
The first baby teeth start to fall out around the age of 6, and the last baby teeth fall out around the ages of 12-14.
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Neighbouring teeth drift into an empty space within months. A maintainer keeps the gap open so the permanent tooth erupts where it should.
Preventing a space from closing is far simpler than reopening it with braces once the arch has crowded.
Most maintainers are cemented in place — nothing for your child to take out, lose or forget to wear.
We check how far the permanent tooth has developed and how much space is at risk, and tell you plainly if a maintainer is not needed.
Measurements are taken, the maintainer is made for your child's teeth, and it is cemented at a short follow-up visit.
We check it at every routine visit and take it out when the permanent tooth is on its way — leaving it in too long causes its own problems.
It depends on which tooth was lost and how long until its replacement is due. An x-ray showing the permanent tooth's development answers it — a molar lost at five usually needs the space held, one lost at ten often does not. We will tell you when a maintainer is unnecessary rather than fit one by default.
Fitting is quick and comfortable. The first few days feel strange and your child's tongue will keep finding it, but that settles within about a week. If anything pokes, feels loose or is causing sore spots, call us rather than wait for the next visit.
Sticky and hard things: taffy, gum, caramels, ice and hard candy are what pull appliances loose. Everything else is fine. Brushing around it thoroughly matters too, because plaque collects where the metal meets the tooth.
Until the permanent tooth is coming through — anywhere from a few months to a few years. We monitor it and the erupting tooth at routine visits and remove it at the right time, since leaving it too long can obstruct the tooth it was protecting.
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