Journal of Jilin University(Medicine Edition) ›› 2026, Vol. 52 ›› Issue (1): 236-245.doi: 10.13481/j.1671-587X.20260125

• Clinical medicine • Previous Articles     Next Articles

Grade Ⅲ open bite complicated with tongue hypertrophy treated by mandibular incisor extraction:A case report and literature review

Lei TIAN,Yuyan LIU,Yuqing WANG,Zhiyu ZHANG,Xiumei SUN()   

  1. Department of Orthodontics,Stomatology Hospital,Jilin University,Changchun 130021,China
  • Received:2025-04-08 Accepted:2025-05-06 Online:2026-01-28 Published:2026-02-24
  • Contact: Xiumei SUN E-mail:xmsun@jlu.edu.cn

Abstract:

Open bite malocclusion, as a clinically common type of malocclusion, presents complex treatment processes and a high relapse rate, making it one of the challenges in orthodontic treatment. The author of this article reported the diagnosis and treatment process of a teenage patient with a grade Ⅲ open bite to provide reference for the clinicians in managing such conditions. The patient, a 13-year-old male, sought treatment for “misaligned teeth and inability to bite with front teeth” to improve occlusal function and facial appearance. The clinical manifestations included a grade Ⅲ anterior open bite, grade Ⅲ maxillary crowding, and macroglossia. The diagnosis was Angle Class Ⅱ malocclusion and Mao’s ClassⅣ2+Ⅰ1+Ⅴ malocclusion. A satisfactory treatment outcome was achieved through maxillary single-jaw extraction combined with the use of a lingual arch. After treatment, the patient’s open bite was significantly improved, with well-aligned upper and lower teeth and an intercuspal occlusion relationship. In the treatment of open bite malocclusion, it is essential to correct bad habits as early as possible, leveraging the patient’s growth potential, the wedge effect of posterior teeth, and the pendulum effect of anterior teeth to correct the open bite.

Key words: Mandibular incisor extraction, Open bite, Tongue hypertrophy, Tongue thrust habit, Orthodontic treatment, Case report

CLC Number: 

  • R783.5