[Orthodontics, stability, recurrence]

Area of Science:

• Orthodontics
• Biomechanical analysis
• Dental medicine

Background:

• The stability of orthopedic treatments is a significant concern in orthodontics.
• Existing studies often yield divergent conclusions due to methodological inconsistencies and lack of reproducibility.
• Comparing results across different studies is challenging.

Purpose of the Study:

• To introduce a structural analysis method for distinguishing skeletal and dental effects in activator treatments.
• To investigate the relationship between treatment response and relapse in patients treated with activator appliances.

Main Methods:

• Utilized a structural analysis approach, as described by Lautou, Dunglas, and Vermelin.
• Analyzed clinical cases treated with activator appliances.
• Differentiated between skeletal and dento-alveolar changes.

Main Results:

• The proposed structural analysis aids in distinguishing skeletal from dental effects.
• Relapse in activator appliance treatments was observed to be associated with inadequate orthopedic response.
• Strong dento-alveolar compensations were identified as a contributing factor to relapse.

Conclusions:

• A reproducible structural analysis method can improve the assessment of orthopedic treatment stability.
• Treatment outcomes with activator appliances are influenced by the interplay between skeletal and dento-alveolar responses.
• Understanding these factors is crucial for minimizing relapse and optimizing treatment stability.