At what percentage of adjacent root development is extraction considered for a supernumerary tooth?

Prepare for the American Board of Pediatric Dentistry Oral Boards. Utilize flashcards and multiple-choice questions with hints and explanations to ace your exam!

Extraction timing is guided by how developed the adjacent permanent tooth’s root is. When the adjacent root is about halfway to two-thirds formed, removing the supernumerary tooth gives enough space and allows the permanent tooth to erupt with less risk to its developing root and surrounding structures. This window tends to balance eruption potential with minimizing complications, making it the preferred threshold.

If the root formation is more advanced (near three-quarters to near completion), eruption can be less predictable and the removal of the supernumerary might pose a higher risk to the developing tooth or require more orthodontic help to achieve proper eruption. If root development is in the very early stage (0-25%), eruption guidance from removal is less reliable because the pathway and timing are still highly variable.