European journal of paediatric dentistry · 2026
Interceptive maxillary expansion in children in the early mixed dentition with maxillary anterior crowding.
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Östlund E, Comaglio I, Rosa M, Bazargani F
Аннотация
AIM: The objective of this study was to assess whether maxillary expansion in the early mixed dentition in cases exhibiting anterior crowding leads to the spontaneous correction of anterior crowding.
METHODS: Thirty-seven patients were included in this retrospective cohort study. The included patients had anterior crowding of ≥ 4 mm between the upper deciduous canines or Little's index of ≥ 3 mm. All patients were treated in the early mixed dentition with RME. Pre- and post-treatment study casts were analyzed. The PAR score was assessed.
CONCLUSION: Treatment limited to RME in the early mixed dentition significantly reduced crowding in the maxillary arch. The weighted PAR exhibited a significant decrease of 21.6%; however, this does not constitute an "improvement" according to the PAR, which mandates a minimum reduction of 30 percent.
METHODS: Thirty-seven patients were included in this retrospective cohort study. The included patients had anterior crowding of ≥ 4 mm between the upper deciduous canines or Little's index of ≥ 3 mm. All patients were treated in the early mixed dentition with RME. Pre- and post-treatment study casts were analyzed. The PAR score was assessed.
CONCLUSION: Treatment limited to RME in the early mixed dentition significantly reduced crowding in the maxillary arch. The weighted PAR exhibited a significant decrease of 21.6%; however, this does not constitute an "improvement" according to the PAR, which mandates a minimum reduction of 30 percent.