Cephalometric Hard and Soft Tissue Norms in Lebanese Adults

Area of Science:

• Orthodontics
• Anthropology
• Dentofacial Morphology

Background:

• Cephalometric norms are crucial for orthodontic diagnosis and treatment planning.
• Existing norms are often race and ethnicity-specific, limiting their universal applicability.
• This study addresses the need for population-specific cephalometric data.

Purpose of the Study:

• To establish cephalometric hard (HT) and soft tissue (ST) norms for Lebanese adults with balanced facial profiles and normal occlusion.
• To investigate sexual dimorphism in these cephalometric measurements within the Lebanese adult population.

Main Methods:

• Utilized pre-treatment cephalograms from 165 adult Lebanese subjects (59 males, 106 females).
• Employed Dolphin Imaging software for automated cephalometric hard and soft tissue measurements.
• Performed descriptive statistics and independent samples t-tests to analyze data and evaluate gender differences.

Main Results:

• Lebanese adults exhibited orthognathic jaw relationships and normodivergent patterns, with incisor inclinations similar to Caucasian norms.
• Soft tissue facial angles indicated straight profiles, but nasolabial angles were more obtuse than Caucasian averages.
• Males showed significantly larger linear skeletal and soft tissue measurements, including thicker lips and more protrusive lips, compared to females.

Conclusions:

• Cephalometric norms for Lebanese adults are largely comparable to Caucasian standards, with notable exceptions in retrognathic yet smaller jaws and more obtuse nasolabial angles.
• Significant gender dimorphism exists in linear skeletal and soft tissue measurements, as well as nasofrontal and Z-angles, with males exhibiting distinct characteristics.
• These findings contribute to more accurate diagnosis and personalized treatment planning in orthodontics for diverse populations.