Abstract
Introduction: Rapid maxillary expansion (RME) is the therapy of choice to correct skeletal transverse dimension in children and adolescents, associating orthopedic and dental effects. In an attempt to prevent the undesirable dentoalveolar effects and optimize the potential of skeletal expansion in individuals in advanced stages of skeletal maturation, the miniscrew-assisted rapid palatal expander (MARPE) was proposed by Lee et al. in 2010. Objective: This paper presents a systematized protocol for selection of miniscrews indicated for MARPE, by the evaluation of cone-beam computed tomographies (CBCT). Variables related with the bone and soft tissue thicknesses at the palatal regions of interest, as well as in relation to the fixation rings of miniscrews of the palatal expander are analyzed and discussed to provide better performance in the clinical practice.
Highlights
Rapid maxillary expansion (RME) is the therapy of choice to correct skeletal transverse dimension in children and adolescents, associating orthopedic and dental effects
Besides posterior crossbites, the presence of crowding, alterations in dental axial inclinations, wide buccal corridors and some Class II and Class III sagittal malocclusions[2] may have the transverse maxillary deficiency as underlying etiologic factor, which is often not diagnosed in the daily clinical practice, indicating that the actual prevalence is possibly higher than currently reported rates.[3]
The following step comprises selection of the coronal sections that were predetermined on the dental casts, as indicated in Figure 2 sequence, following the identification of reference lines transverse to the midpalatal suture, passing through the fixation rings of miniscrews mesial and distal to the expanding screw
Summary
Rapid maxillary expansion (RME) is the therapy of choice to correct skeletal transverse dimension in children and adolescents, associating orthopedic and dental effects. In an attempt to prevent the undesirable dentoalveolar effects and optimize the potential of skeletal expansion in individuals in advanced stages of skeletal maturation, the miniscrew-assisted rapid palatal expander (MARPE) was proposed by Lee et al in 2010
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