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Baby teeth (dentists call them primary or deciduous teeth) aren't just for chewing. |
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Each one also acts as a guide for the permanent tooth that replaces it. |
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If a primary tooth is lost too early, the permanent tooth loses its guide and can drift or erupt incorrectly
into the mouth. |
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Neighboring teeth also can move or tilt into the space, so the permanent tooth can't come in. |
Primary teeth can be lost too early for several reasons:
- They can be knocked out in a fall or other accident.
- Extensive decay can require that a primary tooth be extracted.
- Primary teeth can be missing at birth.
- Some diseases or conditions can contribute to early tooth loss.
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If your child loses a primary tooth before the permanent tooth is ready to come in, or if the permanent tooth
is missing, your dentist may decide to use a space maintainer. |
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The maintainer keeps the space open until the permanent tooth comes in. |
| Types of Space Maintainers |
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A space maintainer is made of stainless steel and/or plastic. |
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It can be removable, or your dentist can cement it in your child's mouth (called a fixed
space maintainer). |
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A removable space maintainer looks like a retainer. |
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It uses artificial teeth or acrylic blocks to fill in the space or spaces that need to be maintained. |
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This type of space maintainer often is used when the space is obvious to other people. |
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Removable space maintainers work well in older children who can reliably follow directions about caring for
this appliance. |
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There are several kinds of fixed space maintainers. |
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A band-and-loop maintainer is made of stainless steel wire. |
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The maintainer is held in place by an orthodontic-type band around an adjacent tooth or a crown on
the tooth. |
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A wire loop attached to the band or crown extends into the space and touches the tooth on the other side
of the space to hold both teeth in place. |
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A lower lingual holding arch is used when back teeth are lost on both sides of the lower jaw. |
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"Lingual" refers to the inside or tongue side of the teeth. |
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This type of space maintainer uses bands wrapped around a tooth on either side of the mouth behind the missing
teeth. |
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A wire connected to the bands runs along the inside of the bottom teeth. |
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A lower lingual holding arch is more stable than two separate band-and-loop space maintainers. |
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Another type of fixed space maintainer called a distal shoe appliance is inserted under the gums. |
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It's used when the tooth in front of an unerupted 6-year molar is lost.
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Because the 6-year molar (also called the first permanent molar) has not come in yet, there is no tooth to
hold a band-and-loop space maintainer in place. |
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With a distal shoe appliance, the end of the metal arm is inserted under the gums and keeps the space
from closing.
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Distal shoe appliances must be monitored frequently because the incoming tooth can easily become blocked
by the wire. |
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The appliance may require adjustment to allow the tooth to come in properly. |
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As a result, most dentists will try to keep the primary tooth in the mouth until the permanent tooth
underneath is ready to come in. |
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Children missing several teeth can use a A partial denture instead of a space maintainer. |
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For example, children with a congenital disease called ectodermal dysplasia often are missing multiple
primary teeth, and there are no permanent teeth to replace them.
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A child with this condition will use a removable denture into adulthood. |
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After that, the child can receive dental implants or continue to use a partial denture. |
| Are Space Maintainers Always Necessary |
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Not every tooth that is lost too early requires a space maintainer. |
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If one of the four upper front teeth is lost early, the space will be maintained on its own until the
permanent tooth comes in. |
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If you do not take your child to the dentist regularly — at least every six months — a space maintainer
can cause problems, especially if your child does not brush well. |
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The gum tissue in the space can grow over the wire arm, increasing the risk of infection. |
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If that happens, your child's dentist may have to remove the gum tissue surgically. |
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If the permanent tooth is about to erupt, your child's dentist may decide not to place a space maintainer
unless space is a critical issue for orthodontic reasons. |
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Some children may not be able to cooperate during the process of making the space maintainer. |
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Others may be at risk of injury if the space maintainer comes loose or breaks. |
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These include children with diseases that affect how they breathe or swallow, and children who are
very young. |
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However, the ability to cooperate with the dentist is more important than a child's age. |
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Young children can get space maintainers if they are able to cooperate during the process. |
Making the Space Maintainer |
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Each space maintainer is custom-made by a dentist or orthodontist. |
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For a fixed space maintainer, a metal band is placed around one of the teeth next to the space, and
impressions are made. |
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The band is removed and sent to a dental laboratory with the impressions. |
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The lab creates the space maintainer and sends it back to your child's dentist, who cements it in place
at a second office visit. |
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Sometimes, a space maintainer can be made in the office in a single visit without impressions. |
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To make a removable space maintainer, impressions are made and sent to a lab, which makes the appliance. |
| Caring for Your Space Maintainer |
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The space maintainer may feel unusual at first, but after a few days, your child probably will forget
about it. |
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A removable space maintainer with replacement teeth can affect speech until your child gets used to it. |
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It's important for your child to brush regularly to keep the gum tissue healthy. |
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If your child has a fixed space maintainer, he or she needs to avoid chewy candy and gum, which can loosen
the band or get caught in the wire arm. |
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If the space maintainer becomes dislodged, there is a risk of swallowing or aspiration (inhaling the object
into the lung). |
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Finally, your child shouldn't push on the space maintainer with his or her tongue or fingers because
that could bend or loosen it. |
Follow-Up |
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Your child's dentist will follow the progress of the incoming permanent tooth by taking
X-rays regularly. |
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When the tooth is ready to erupt, the space maintainer is removed. |
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If there is no permanent tooth, the space maintainer will be used until your child's growth is completed
(age 16 to 18), and then a bridge, implant or removable partial can be placed in the space.
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