Enlargement of the frontal sinus

Area of Science:

• Craniofacial development
• Human growth and development
• Osteology

Background:

• The frontal sinus, a paranasal sinus, develops within the frontal bone.
• Understanding its growth patterns is crucial for assessing craniofacial morphology and development.

Purpose of the Study:

• To longitudinally analyze the enlargement patterns of the frontal sinus in males and females.
• To determine the timing of frontal sinus appearance, peak growth, and cessation of enlargement.

Main Methods:

• Longitudinal cephalometric study of 96 subjects (49 males, 47 females).
• Initial cephalograms taken between 2-11 years of age, with follow-ups at approximately yearly intervals until age 24+.
• Standardized measurement of the maximum vertical height of the frontal sinus.

Main Results:

• Median age of frontal sinus appearance: 3.25 years (boys) and 4.58 years (girls).
• Average adult sinus size: 32.60 mm (males) and 26.60 mm (females).
• Median age of growth cessation: 15.68 years (boys) and 13.72 years (girls).

Conclusions:

• Frontal sinus enlargement, primarily an osteoclastic process, closely follows bone length growth trends.
• Growth cessation occurs earlier in females than in males.
• Enlargement was still ongoing in only six subjects by the final cephalogram.