Maxillary transverse expansion in adults: Rationale, appliance design, and treatment outcomes

Kee Joon Lee, Sung Hwan Choi, Tae Hyun Choi, Kyung Keun Shi, Byeong Tak Keum

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Balanced transverse relationship between maxillary and mandibular dentition is a prerequisite for establishment of normal occlusion regardless of patient's age. In particular, considering the high prevalence among adults, maxillary transverse deficiency does not appear to be diagnosed or treated properly possibly due to the lack of diagnostic measures and treatment modality. A center-of-resistance perspective of the transverse dimension may be helpful for the clinicians to understand the pattern and severity of discrepancy. In terms of treatment, non-surgical expansion of the maxillary basal bone may be facilitated based on the understanding on the complexity of the circummaxillary structure and the stress distribution pattern. According to our experimental outcomes and clinical trials, a combined tooth-and-bone-borne maxillary expander, i.e., miniscrew-assisted rapid palatal expander (MARPE), has been introduced. The rationale of appliance design and clinical outcomes including the stability of the maxillary expansion are to be explained in the present article. Under proper manipulation of the expander, non-extraction and/or non-surgical camouflage of various skeletal discrepancies can be encouraged. Radical transverse correction in surgical cases may also reduce the need for extraction or additional surgery. Overall, it can be concluded that the non-surgical palatal expansion in young adults can be a useful modality exhibiting high success rate of suture separation and clinically acceptable stability following expansion.

Original languageEnglish
Pages (from-to)52-65
Number of pages14
JournalSeminars in Orthodontics
Issue number1
Publication statusPublished - 2018 Mar

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2017R1D1A1B03035435).

Publisher Copyright:
© 2018 Elsevier Inc.

All Science Journal Classification (ASJC) codes

  • Orthodontics


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