A 9-year-old with a peg lateral incisor and mild incisor crowding: which interceptive option could prevent future space issues?

• A. Root canal treatment on the peg lateral.
• B. Extraction of the peg lateral.
• C. Removable space maintainer in early mixed dentition.
• D. Composite bonding to improve eruption path and space maintainers or removable appliances; refer to orthodontist.

Answer: (D)

Interceptive management that modifies eruption path while preserving space is the approach that best prevents future crowding in a 9-year-old with a peg lateral. Bonding up the peg lateral to create a more normal tooth contour helps guide the eruption of the adjacent teeth and can reduce tipping or misalignment as the permanent incisors and canines come in. Pairing this with a space-maintaining appliance keeps the arch length and tooth positions stable during the mixed-dentition phase, so there’s room for eruption without compromising alignment.

Root canal treatment on the peg lateral wouldn’t address space or eruption concerns. Extracting the peg lateral is a more drastic move that can create new aesthetic and spacing issues, especially when crowding is mild. Relying on a space maintainer alone without addressing eruption path misses a key factor in prevention. By combining composite bonding to influence eruption with space maintenance or removable appliances and involving an orthodontist, you get a coordinated plan that preserves space and guides proper eruption.