Assessed facial normality after Twin Block therapy

Area of Science:

• Orthodontics
• Craniofacial analysis
• Aesthetic perception

Background:

• Class II division 1 malocclusion presents aesthetic challenges.
• Understanding perception of facial normality is crucial for treatment outcomes.
• Twin Block therapy is a common orthodontic intervention.

Purpose of the Study:

• To compare orthodontist and layperson perception of facial normality in Class II division 1 malocclusion.
• To assess facial changes after Twin Block therapy.
• To correlate facial changes with clinical measurements.

Main Methods:

• Animated laser scans of 16 adolescent patients before and after Twin Block therapy.
• Visual analogue scale (VAS) assessment by 34 orthodontists and 35 laypeople.
• Analysis of soft tissue dimensions and overjet using 'Mark and Measure' and 'Orientated' techniques.

Main Results:

• No significant difference in initial facial normality perception between orthodontists and laypeople.
• Twin Block therapy significantly improved facial normality scores for both groups.
• A majority (87%) perceived overall aesthetic improvement post-therapy.
• Increased soft tissue lower face height correlated with layperson perception; overjet reduction correlated with orthodontist perception.

Conclusions:

• Orthodontists and laypeople share similar baseline perceptions of facial normality in Class II division 1 malocclusion.
• Twin Block therapy effectively enhances facial aesthetics, as perceived by both professionals and the public.
• Specific cephalometric changes, like increased lower face height and reduced overjet, are key indicators of improved facial normality.