Three-dimensional interpretation of intercanine width change in children: a 9-year longitudinal study

Area of Science:

• Orthodontics and Dental Development
• Craniofacial Growth Analysis
• Biometric Measurement Techniques

Background:

• The stability of intercanine width is a long-standing topic in dental research.
• Understanding longitudinal changes is crucial for orthodontic treatment planning.
• Previous studies often lacked detailed 3D analysis of these dimensions.

Purpose of the Study:

• To longitudinally track intercanine width changes in children aged 6 to 14.
• To analyze related 3D dental arch parameters over time.
• To evaluate the clinical significance of observed changes using advanced imaging.

Main Methods:

• Annual 3D laser scanning of dental casts from 66 children (6-14 years).
• Measurement of intercanine width, intercanine triangle area, and canine-occlusal plane angles.
• Longitudinal data analysis using mixed-effects models for statistical significance.

Main Results:

• Slight decreases in intercanine width were observed in both sexes and arches.
• Changes were small relative to initial values and individual variability.
• While some angles showed trends, intercanine width remained clinically stable.

Conclusions:

• Intercanine width demonstrates considerable stability in untreated individuals post-dental development.
• Significant individual variations exist, but overall arch dimension is predictable.
• 3D analysis confirms relative immutability of intercanine width in this age group.