The decision of whether to have an extraction or non-extraction treatment plan is a controversial issue for an orthodontist. Many orthodontic techniques can help to resolve the crowding dentition by using the non-extraction treatment plan. This case report describes the correction of Class III molar malocclusion with the application of two mini-screws. The line of action of the force from the temporary anchorage devices pass through the center of resistance in the mandible, therefore the movement of the lower arch can be controlled without lingual tipping or intrusion of the mandibular incisors. At the end of the treatment, Class I molar and canine relationships were achieved with satisfactory outcome.
Chang, Tao-Wei; Luk, Hoi-Shing; Tai, Wen-Ken; Chou, Chih-Chen; and Kao, Chia-Tze
"Strategies of Non-extraction Treatment for Class lll Malocclusion,"
Taiwanese Journal of Orthodontics: Vol. 34:
2, Article 3.
https://doi.org/10.38209/2708-2636.1122 Available at: https://www.tjo.org.tw/tjo/vol34/iss2/3
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