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Asymmetric Orthodontic Space Closure of Unilateral Congenitally Missing Second Premolars
This case report presents successful orthodontic management of unilateral retained deciduous second molars and congenitally missing second premolars using an additional anchorage in conjunction with the segmented arch approach. A 21-year-old female patient presented as skeletal Class I malocclusion, mild crowding, straight facial profile, and orthodivergent facial pattern. The treatment plan was established to extract deciduous teeth and close the extraction space by molar protraction. A Nance appliance and lingual holding arch were used as an additional anchorage to maintain the facial profile and dental midline, with pure molar protraction performed using a segmented arch and sliding mechanics. After 1 year of molar protraction with well-controlled molar angulation and rotation, a continuous arch was performed for full mouth refinement. The total treatment duration was 34 months achieving unilateral molar protraction and bilateral Class I molar and canine relationships with satisfactory facial esthetics and functional occlusion.
Vejwarakul, Weerayuth; Wang, Yu-Chih; and Hsieh, Yuh-Jia
"Asymmetric Orthodontic Space Closure of Unilateral Congenitally Missing Second Premolars,"
Taiwanese Journal of Orthodontics: Vol. 33:
4, Article 4.
https://doi.org/10.38209/2708-2636.1112 Available at: https://www.tjo.org.tw/tjo/vol33/iss4/4
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