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Correction of Supernumerary Tooth-Associated Anterior Crossbite in Mixed Dentition Using a 2 × 4 Appliance
Prasanna Chandraseharan1, Bavani Sinnumu Naidu2, Thaarani Vijayakumar3
1Department of Paediatric Dentistry, Hospital Teluk Intan, Teluk Intan, Perak, Malaysia.
Case Reports in Dentistry
|August 9, 2026
Summary
A supernumerary tooth caused an anterior crossbite in a child, leading to gum recession. Early extraction of the extra tooth and orthodontic treatment with a 2x4 appliance successfully corrected the bite and improved stability.
Area of Science:
- Dentistry
- Orthodontics
- Paediatric Dentistry
Background:
- Anterior crossbite is a common malocclusion in children during mixed dentition.
- Supernumerary teeth are a potential cause of anterior crossbite.
- Early intervention is crucial to prevent complex orthodontic issues.
Purpose of the Study:
- To describe the management of anterior crossbite caused by a supernumerary tooth in a paediatric patient.
- To highlight the effectiveness of early interceptive orthodontic treatment.
Main Methods:
- A case report of a 10-year-old child with anterior crossbite (Teeth 21, 31) and gingival recession.
- Diagnosis of an associated supernumerary tooth.
- Interceptive treatment involving extraction of the supernumerary tooth and 2x4 appliance therapy.
Main Results:
- Successful correction of the anterior crossbite.
- Restoration of adequate overjet and stability at 6-month follow-up.
- Demonstrated efficacy of the 2x4 appliance in managing anterior crossbite.
Conclusions:
- Extraction of a supernumerary tooth is effective in managing associated anterior crossbite.
- The 2x4 appliance is a viable option for anterior crossbite correction, especially in non-compliant patients.
- Early interceptive management prevents the need for more complex orthodontic treatments.
