Space Maintenance

When your child needs one

Not every early tooth loss needs one. It depends on:

• Which tooth was lost. Back teeth hold space that matters structurally. Front baby teeth mostly don't — losing an upper front tooth early is usually a cosmetic and speech question, not a space one.
• How old your child is, and how far the permanent tooth is from erupting. If the adult tooth is arriving in a couple of months, there's often nothing to maintain.
• How crowded things already are. A child with generous spacing has more margin than one who's tight to begin with.

We'll look at an x-ray to see exactly where the permanent tooth is sitting before recommending anything.

The Four Most Common Space Maintainers

Which one your child gets depends on where the gap is, how many teeth are missing, and which permanent teeth have arrived.

Band and loop

For a single missing back tooth, on one side.

• This is the one we place most often. A thin metal band is cemented around the tooth on one side of the gap, and a smooth wire loop extends across the empty space to rest gently against the tooth on the other side.
• The loop acts as a physical blocker. Nothing can drift into the space because the wire is already occupying it.
• It's simple, small, and children adapt to it quickly. One thing to know: it holds the space but doesn't replace the tooth for chewing — there's no false tooth on it.

Distal shoe

For a second baby molar lost before the six-year molar has come in.

• This is the specialized one, and it solves a specific problem: if that back baby molar is gone and the first permanent molar hasn't erupted yet, there's no tooth behind the gap to anchor against. A band and loop has nothing to rest on.
• The distal shoe has a small blade that extends beneath the gum line, into the tissue where the permanent molar is developing. As that molar erupts, it comes up against the blade and gets guided into the correct position rather than drifting forward.
• It's the only appliance that can steer a tooth that hasn't emerged yet. We take an x-ray to position the blade precisely.
• Because part of it sits under the gum, we review your child's medical history carefully first — it isn't the right choice for children with certain heart conditions or compromised immune systems. Once the permanent molar has erupted, we typically replace it with a band and loop.

Lower lingual holding arch (LLHA)

For missing teeth on both sides of the lower jaw.

• Bands are placed on the lower back molars on each side, connected by a wire that runs along the inside of the lower teeth — the tongue side — and rests lightly behind the lower front teeth.
• That wire braces both sides against each other. The back molars can't drift forward because the arch holds them, and the overall length of the dental arch is preserved.
• It's one appliance doing the work of two, which is why we use it when your child has lost baby molars on both sides below. It's usually placed once the lower permanent front teeth have come in, since the wire needs those teeth to rest against.

Nance appliance

For missing teeth on both sides of the upper jaw.

• The upper-arch counterpart. Bands go on the upper back molars, joined by a wire that crosses the roof of the mouth to a small acrylic button sitting against the palate just behind the front teeth.
• That button is the anchor. It braces against the palate so the upper molars can't slide forward into the empty spaces.
• One thing worth knowing: because the button rests directly on the palate, the tissue underneath it needs good cleaning. Food can collect there and irritate the gum if hygiene slips. It's manageable — it just needs attention, and we'll show your child exactly how.