The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Pattern of microimplant displacement during maxillary skeletal expander treatment: A cone-beam computed tomography study

  • Ney Paredes (Private Practice) ;
  • Ausama Gargoum (Center for Health Science, Section of Orthodontics, UCLA School of Dentistry) ;
  • Ramon Dominguez-Mompell (Department of Orthodontics, Rey Juan Carlos University) ;
  • Ozge Colak (Department of Orthodontics, State University of New York) ;
  • Joseph Bui (Center for Health Science, Section of Orthodontics, UCLA School of Dentistry) ;
  • Tam Duong (Center for Health Science, Section of Orthodontics, UCLA School of Dentistry) ;
  • Maya Giannetti (Section of Orthodontics, UCSF School of Dentistry) ;
  • Fernanda Silva (Center for Health Science, Section of Orthodontics, UCLA School of Dentistry) ;
  • Kendra Brooks (Center for Health Science, Section of Orthodontics, UCLA School of Dentistry) ;
  • Won Moon (Orthodontic and Craniofacial Development Research, Forsyth Institute)
  • Received : 2023.04.17
  • Accepted : 2023.07.17
  • Published : 2023.09.25
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Abstract

Objective: To analyze the microimplant (MI) displacement pattern on treatment with a maxillary skeletal expander (MSE) using cone-beam computed tomography (CBCT). Methods: Thirty-nine participants (12 males and 27 females; mean age, 18.2 ± 4.2 years) were treated successfully with the MSE II appliance. Their pre- and post-expansion CBCT data were superimposed. The pre- and post-expansion anterior and posterior inter-MI angles, neck and apical inter-MI distance, plate angle, palatal bone thickness at the MI positions, and suture opening at the MI positions were measured and compared. Results: The jackscrew plate was slightly bent in both anterior and posterior areas. There was no significant difference in the extent of suture opening between the anterior and posterior MIs (P > 0.05). The posterior MI to hemiplate line was greater than that anteriorly (P < 0.05). The apical distance between the posterior MIs was greater than that anteriorly (P < 0.05). The palatal thickness at the anterior MIs was significantly greater than that posteriorly (P > 0.01). Conclusions: In the coronal plane, the angulation between the anterior MIs in relation to the jackscrew plate was greater than that between the posterior MIs owing to the differential palatal bone thickness.

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References

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