Long-Term Evaluation of Class¥± Treatment in Adolescents with Hyperdivergent Growth Pattern
Lecture Description
Treatment of skeletal hyperdivergent Class II malocclusion is challenging for clinicians, especially in growing patients. Although vertical and sagittal skeletal relationships of Class II subjects tend to improve with growth, prediction of facial growth is more difficult in patients with hyperdivergent skeletal patterns due to higher probability of unfavorable growth. Traditional treatment approaches include use of high-pull headgear and/or functional appliances for orthopedic effects, such as inhibition of maxillary forward-downward growth and enhancement of mandibular forward growth, along with dental effects. However, the optimal timing of treatment according to the vertical skeletal pattern remains controversial. There is limited evidence on long-term skeletal effects of conventional appliances followed by fixed orthodontic treatment with or without extractions in adolescents. Moreover, treatment effects of conventional approaches heavily depend on patients’ compliance, and often require prolonged use of appliances to control vertical growth during fixed treatment and retention as well. Mini-implants, non-compliant appliances, are also a possible treatment option in growing patients by controlling vertical eruptions of molars, though only few studies have reported treatment results and long-term stability.
Therefore, the purpose of this presentation is to examine long-term effects of conventional Class II treatment in adolescents with the hyperdivergent growth pattern, and to compare post-treatment changes between patients with different treatment responses through statistical analysis of a pilot study. Furthermore, I would like to discuss the effectiveness of mini-implants by reviewing the clinical cases.
October 28-30, 2022 ¡¤ COEX, Seoul, Korea