Lead Author Affiliation

Doctor of Dental Surgery

Lead Author Program & Year

DDS Year 3

Second Author Program & Year

Graduate Orthodontics

Presentation Category

Research

Introduction/Context/Diagnosis

Micro-implant Assisted RPE (MARPE) were introduced recently to obtain greater skeletal expansion and to minimize dental effects. In the present study, we evaluated dental tipping immediately after the completion of MARPE expansion using CBCT.

Methods/Treatment Plan

Seventy one patients (mean age, 19.1 years) who had undergone MARPE and cone-beam computed tomography at initial (T1) and after expansion (T2) were included in this retrospective study. Craniofacial patients were excluded. 3D tracings and measurements were done by two judges using Invivo 6. Changes in the right and left maxillary first molar inclinations (U6 to palatal plane angle) were evaluated with paired t-tests. Pearson correlation was used to assess correlation between maxillary first molar inclination change and the following measurements: palatal thickness, age, amount of expansion, and height of jackscrew from occlusal plane.

Results/Outcome

Total expansion of 7.75 ± 2.39mm was achieved. Maxillary molars presented 3.57 ± 3.76 ° buccal tipping. Molar inclination change (buccal tipping during T1-T2) was statistically significant (p<.0001) . Palatal thickness, age, amount of expansion, and height of jackscrew from occlusal plane did not show statistically significant linear correlation with maxillary first molar inclination change.

Significance/Conclusions

MARPE appliances can be used to correct transverse maxillary deficiency in adolescent to adult patients with minimal dentoalveolar side effects.

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Assessment of Dental Tipping After Micro-Implant Assisted Expansion: CBCT Study

Micro-implant Assisted RPE (MARPE) were introduced recently to obtain greater skeletal expansion and to minimize dental effects. In the present study, we evaluated dental tipping immediately after the completion of MARPE expansion using CBCT.