Age-dependent effects of transverse maxillary deficiency treated by microimplant-assisted rapid palatal expansion: A prospective cone-beam computed tomography study

Objective The aim of this study was to evaluate skeletal and dentoalveolar changes before and after skeletal anchorage-assisted rapid palatal expansion in young adults by cone beam computed tomography. Materials and Methods This pilot study included ten patients with a mean age of 21.5 years with maxillary transverse deficiency treated with the skeletal expander. Three dimensional evaluation of the changes before and after expansion was evaluated with Cone Beam CT. Statistical analysis was performed using paired t-test. Results Skeletal expander produced an increase in maxillary transverse dimension at the skeletal, alveolar, and dental level. The maximum expansion was at the level of dentition, and the least amount of expansion was at the level of the frontonasal suture. There was also evidence of sutural divergence and buccal tipping. Conclusion The maxillary skeletal expander is an effective method for correction of maxillary transverse deficiency without surgery in adults.

Download Full-text

Comparative dimensional tomographic study of the mandibular condyle of individuals with transverse maxillary deficiency

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v15i4.8650028 ◽

2017 ◽

Vol 15 (4) ◽

pp. 242

Author(s):

Andréa Guedes Barreto Gonçales ◽

Victor Tieghi Neto ◽

Eduardo Sanches Gonçales ◽

Ana Lúcia Álvares Capelozza

Keyword(s):

Computed Tomography ◽

Statistical Analysis ◽

Mandibular Condyle ◽

Cone Beam ◽

Maxillary Expansion ◽

Palatal Expansion ◽

Rapid Palatal Expansion ◽

Maxillary Deficiency ◽

Posterior Anterior ◽

Paired T Test

Transverse maxillary deficiency is characterized by posterior uni or bilateral crossbite, crowded and rotated teeth, as well as high palate. Its treatment in adult individuals is surgically assisted rapid palatal expansion. The aim of this study was to verify the occurrence of dimensional alterations in the mandibular condyles of patients with TMD submitted to surgically assisted maxillary expansion. Measurements of the mandibular condyles using the DISTANCE tool in cone beam computed tomography iCat software were performed. The values obtained were submitted to statistical analysis by the paired t-test and the results showed statistically significant dimensional reduction in the axial posterior-anterior lateral (-0.74mm), axial posterior-anterior lateral left (-0.90mm) and coronal medium right (-1.24mm) dimensions. The coronal inferior (1.13mm), coronal inferior left (1.78mm) and coronal superior-inferior right (0.76mm) measurements showed statistically significant dimensional increase. The results allowed us to conclude that dimensional alterations occurred in the mandibular condyles in individuals with maxillary transversal deficiency that underwent surgically assisted rapid palatal expansion (SAPE), which can be understood by remodeling, since they are characterized by dimensional increase or reduction, depending on the location where the measurement was performed.

Download Full-text