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KMID : 0361920230530050289
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Korean Journal of Orthodontics
2023 Volume.53 No. 5 p.289 ~ p.297
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Pattern of microimplant displacement during maxillary skeletal expander treatment: A cone-beam computed tomography study
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Ney Paredes
Ausama Gargoum
Pietro G. di Summa
Ozge Colak
Joseph Bui
Tam Duong
Maya Giannetti
Yoon Jae-Hong
Kendra Brooks
Oscar J. Manrique
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Abstract
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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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KEYWORD
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Expansion, Microimplant-assisted rapid palatal expansion, Maxillary skeletal expander, Bone-anchored maxillary expander
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