[Vertical changes in the lateral teleroentgenographic image after functional orthodontic therapy]

Area of Science:

• Orthodontics
• Craniofacial Growth
• Biotechnology

Background:

• Distal occlusion is a common orthodontic concern.
• Functional appliances are used to correct malocclusions.
• Understanding their effects on vertical facial growth is crucial.

Purpose of the Study:

• To investigate the vertical changes in the craniofacial complex following treatment with Andresen and Häupl appliances.
• To analyze the impact of functional appliance therapy on vertical proportions and facial heights.

Main Methods:

• Lateral cephalometric X-rays of patients treated for distal occlusion were analyzed.
• Vertical changes in alveolar processes, facial heights, and specific anatomical landmarks were measured.

Main Results:

• Increased vertical growth observed in the alveolar processes of the upper incisors and lower molars.
• Anterior facial height increased relative to posterior facial height, causing a non-significant bite opening.
• Active vertical growth occurred in the nasomaxillary complex, more pronounced anteriorly.
• No significant additional vertical growth was noted in the mandibular rami or condyles.

Conclusions:

• Functional appliance therapy influences vertical craniofacial proportions, primarily through alveolar and nasomaxillary complex changes.
• The effect on the nasomaxillary complex is complex, involving relative inhibition of development.
• Mandibular growth influence is minimal, with significant vertical changes concentrated in mandibular molars and anterior facial heights.