Method: Evaluation by cone beam computed tomography (CTCB) in adult patients with malocclusion Class I and Class II Division 1 with anterior dentoalveolar open bite , orthodontically treated during an average period of 12 months with mini-implants. The sample consisted of 10 Brazilian adults (20 ATMs) of both genders (five males and five females), mean age 23 years and 6 months, standard deviation of 5 years and 3.5 months, asymptomatic. CTCB images were acquired at two treatment times: T1 - beginning and T2 – final of the treatment and observation period. We performed quantitative assessment of the position of the condyle in mandibular fossa in maximum intercuspation (MI).
Result: The values obtained with the quantitative evaluation of the condylar position in the glenoid fossa to the beginning of treatment showed that in MI the condyle is slightly displaced in anteroposterior and asymmetrically between the right and left sides and the superior articular space is increased compared to the other spaces joint . At the end of treatment (T2) showed that in MI the condyle tended to an anterior displacement and maintains the asymmetry between right and left sides The upper space values were close to the anterior and posterior spaces. There was no differences between the beginning and end of treatment in anteroposterior condylar position, however, there were differences (p<0.01) between the values of superior joint space from beginning to end of treatment.
Conclusion: After the intrusion of posterior teeth and open bite correction with mini-implants, the condyle was displaced vertically and joint space was regularized.