A characteristic of Class II Division 2 malocclusion is severe deep overbite and lingual inclination of the incisors. Deep overbite can be corrected by intrusion of anterior teeth, extrusion of posterior teeth, or a combination of both. Intrusion of the incisors should be the preferred treatment in nongrowing patients with anterior deep bites.
The patient is a 21-year-old female who had a skeletal Class II, hypodivergent facial pattern, Class II division 2 malocclusion, crowding dentition and traumatic 100% deep overbite. We extracted the two upper first premolars to relieve crowding, and the mandibular crowding was resolved by aligning the lower arch. Tip-Edge plus bracket were bonded on both arches. We corrected the deep overbite with an anchor bend and a reverse curve of Spee by proclining and intruding the upper and lower incisors. The posttreatment occlusion was significantly improved.
The treatment that frequently used to correct deep overbite includes invasive methods such as orthognathic surgery, or use temporary anchorage device (TAD) for adjunctive therapy. The most common noninvasive method is segmental intrusive arch, which was designed by Dr. Burstone. In our case, a continuous archwire with an anchor bend and a reverse curve of Spee that combine with cutting edge brackets can easily place an intrusive force on the incisors. Because of the cutting edge, when we place an intrusive force to the incisors, there are only point contact between the wire and the bracket without binding, and it can directly deliver an intrusive force to the incisors. This case showed successful treatment outcome with deep bite correction by the continuous wire mechanism.
Huang, Yu-Hui; Kuo, Chun-Liang; Liu, I-Hua; Yang, Chun-Hsiu; and Wang, Chung-Li
"Noninvasive Orthodontic Treatment for Class II Division 2 Adult Patient with 100% Deep Bite by Continuous Wire Mechanism,"
Taiwanese Journal of Orthodontics: Vol. 33:
4, Article 6.
https://doi.org/10.38209/2708-2636.1114 Available at: https://www.tjo.org.tw/tjo/vol33/iss4/6
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