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Upper and lower arch changes after Mixed Palatal Expansion protocol.

V Grassia1, F d'Apuzzo1, D DiStasio1

  • 1Multidisciplinary Department of Medical-Surgical and Dental Specialties, Second University of Naples, Naples, Italy.

European Journal of Paediatric Dentistry
|December 18, 2014
PubMed
Summary
This summary is machine-generated.

Mixed Palatal Expansion (MPE) significantly improved upper and lower arch dimensions in growing patients with crossbite and crowding. This orthodontic treatment offers effective dental arch development compared to no treatment.

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Area of Science:

  • Orthodontics
  • Dentofacial Orthopedics
  • Pediatric Dentistry

Background:

  • Posterior crossbite and mild-to-moderate crowding are common in growing patients.
  • Early intervention with Mixed Palatal Expansion (MPE) aims to correct transverse discrepancies.
  • Assessing dental changes is crucial for treatment efficacy.

Purpose of the Study:

  • To evaluate dental arch changes following Mixed Palatal Expansion (MPE) treatment.
  • To compare outcomes in growing patients with posterior crossbite and crowding against an untreated control group.
  • To analyze upper and lower dental arch modifications using dental cast analysis.

Main Methods:

  • A Hyrax-type device was used for MPE in 24 growing patients.
  • An untreated matched control group was used for comparison.
  • Dental casts were analyzed at two time points (T0 and T1) measuring arch widths and depths.

Main Results:

  • Significant increases in upper arch widths (intermolar, interpremolar-2nd, interpremolar-1st, intercanine) were observed post-MPE.
  • Significant increases in lower arch widths (intermolar, interpremolar-1st, intercanine) were noted in the MPE group compared to controls.
  • MPE treatment demonstrated considerable transverse dental changes in both arches.

Conclusions:

  • Mixed Palatal Expansion (MPE) leads to significant transverse changes in both upper and lower dental arches.
  • The study confirms the effectiveness of MPE in addressing arch dimension discrepancies in growing individuals.
  • MPE is a viable treatment for improving arch form in patients with crossbite and crowding.