Space maintainer is cemented to the existing tooth that is behind the missing tooth with an arm extending out touching the tooth in front of the empty space. This arm is there to keep that empty space open to allow the adult tooth underneath to erupts when ready. The space maintainer is ready to be remove once the adult tooth erupts and touches the bars.
After placement of the space maintainer, it is very important that your child does not eat anything hard on it or play with it, as this can cause it to fall off. If it does fall off, it is imperative that you save the space maintainer so we can re-cement it back into place.