Which of the following are designed to hold open space when a primary tooth has been lost prematurely?

• A. Braces
• B. Space maintainers
• C. Dental implants
• D. Retainers

Answer: (B)

Preserving the space after early loss of a primary tooth is essential to ensure the permanent successor erupts in the correct position and the arch maintains its proper length. Space maintainers are the devices designed specifically for this purpose. They can be fixed, such as band-and-loop or crown-and-loop types, or removable, and they hold the adjacent teeth in place so they don’t drift into the empty space. This prevents crowding and bite problems that can complicate future treatment.

Braces are used to move teeth and correct alignment and bite, not primarily to hold space after premature loss. Dental implants are discussed for replacing missing teeth, but in children with growing jaws they aren’t used as space maintainers and can be unsuitable until growth is complete. Retainers keep teeth in position after orthodontic treatment, rather than preserving a space left by a prematurely lost primary tooth.