Children may need space maintainers' treatment if they lose a tooth early or have a baby (primary) tooth extracted due to dental decay. A Dental Space Maintainer is an appliance that is custom-made by a dentist or orthodontist in acrylic or metal material. It can be either removable or cemented in a child's mouth. Its purpose is to keep the space open to allow the permanent tooth to erupt and come into place. Baby teeth are important to the development of the teeth, jaw bones and muscles and help to guide permanent teeth into position when the baby teeth are lost. If a space is not maintained, then teeth can shift into the open space and orthodontic treatment may be required. Not every child who loses a baby tooth early or to dental decay requires a space maintainer, however, a professional consultation with your dentist or orthodontist should be conducted to determine if using a space maintainer is needed. A Teeth Space Maintainer is made of stainless steel and/or plastic. It can be removable. Some space maintainers are cemented onto the teeth on either side of the space in the child's mouth. This is called a fixed space maintainer. A removable space maintainer looks like a retainer. It uses artificial teeth or plastic blocks to fill in the space or spaces that need to stay open. This type of space maintainer often is used when the space is obvious to other people. Removable space maintainers work well in older children who can reliably follow directions about caring for this appliance.