[The distal active concept applied to the mixed dentition: a comparative study].

Area of Science:

• Orthodontics
• Craniofacial Development
• Pediatric Dentistry

Background:

• Class II malocclusion is a common dental issue.
• Early intervention in orthodontics can significantly impact treatment outcomes.
• Mandibular growth potential varies with developmental stages.

Purpose of the Study:

• To evaluate the effectiveness of Distal Active Concept (DAC) therapy in promoting mandibular growth.
• To compare the efficacy of DAC therapy during mixed dentition versus permanent dentition stages.
• To determine the optimal timing for DAC therapy in patients with Class II malocclusion.

Main Methods:

• A cohort of 30 nine-year-old patients with mixed dentition received DAC therapy for six months.
• A cohort of 34 twelve-year-old patients with permanent dentition received DAC therapy for 24 months.
• Mandibular growth was measured and compared between the two groups.

Main Results:

• DAC therapy in mixed dentition yielded an average mandibular growth of 7.6 mm.
• DAC therapy in permanent dentition resulted in an average mandibular growth of 3.9 mm.
• The difference in mandibular growth between the two groups was statistically significant.

Conclusions:

• Distal Active Concept (DAC) therapy is significantly more effective in promoting mandibular growth during the mixed dentition period.
• Early orthodontic treatment during the prepubertal phase, specifically at age 9, offers superior results for Class II malocclusion.
• DAC therapy presents a viable alternative to traditional activator treatments for early-stage Class II malocclusion management.