2022 KAO APOC Seoul CREATING A NEW ERA In Orthodontics October 28-30, 2022 ¡¤ COEX, Seoul, Korea

Ko Hwang Award

Long-term stability of patients with transverse discrepancy by orthodontic treatment only
Seong-Min Bae (¹è¼º¹Î)

Lecture Description
Problems in the transverse dimension can be challenging to manage, especially in adult patients. Several etiologic factors that cause adult transverse discrepancies are true excess or deficient maxillary or mandibular transverse growth, ectopic tooth eruption, soft tissue imbalance (example: prolonged digit sucking), asymmetric mandibular growth,etc.

Considering factors when formulating a diagnosis and treatment plan for adult patients with transverse discrepancies are magnitude of transverse discrepancy, facial symmetry or asymmetry with lateral CR-CO shift, whether the transverse discrepancy is absolute or relative transverse discrepancy due to AP discrepancy, magnitude of buccal corridors and magnitude of transverse dental compensations

Treatment options for adult transverse discrepancies are multiple maxillary osteotomy, SARPE, MARPE and dental expansion.

Dental expansion includes translating maxillary posterior teeth buccally with fixed appliance with or without Quadhelix or TPA is available in thick periodontal biotype patients for expansion of transverse maxillary first molar about 3~5mm.

Recently, as skeletal lateral expansion using orthodontic microscrews has been popularized, I have found that the curve of Wilson is removed or, in severe cases, reversed due to unnecessary skeletal expansion and often over-application. In addition, excessive maxillary expansion and compensatory mandibular excessive dental arch expansion are taking place.

In addition, there was a question as to whether the old principle of orthodontic treatment to prevent orthodontic relapse, “maintenance of lower intermolar width”, is still effective.

Therefore, I would like to share the experience of long-term observation of treatment cases using dental expansion and molar distalization using MIA (Micro-Implant Anchorage) in cases with transverse discrepancy with or without dental crowding.