New formula to objectively evaluate skeletal maturation using lateral cephalometric radiographs

Area of Science:

• Dentistry
• Orthodontics
• Radiology

Background:

• Objective skeletal maturation assessment is crucial for orthodontic treatment planning.
• Cervical vertebral maturation is a reliable indicator of skeletal development.
• Existing methods may lack precision or require additional imaging.

Purpose of the Study:

• To develop and validate new regression formulas for assessing cervical vertebral bone age in Brazilian children and adolescents.
• To objectively evaluate skeletal maturation using lateral cephalometric radiographs.
• To compare the accuracy of the new formulas with the Tanner-Whitehouse (TW3) method.

Main Methods:

• Development of regression formulas based on C3 and C4 cervical vertebral measurements from lateral cephalometric radiographs.
• Validation of formulas using a separate sample, comparing cervical vertebral bone age with hand-wrist bone age (TW3 method).
• Statistical analysis (ANOVA) to compare chronological age, bone age, and cervical vertebral bone age.

Main Results:

• No statistically significant differences were found between cervical vertebral bone age, bone age, and chronological age for both genders.
• Accelerated growth in C3 and C4 cervical vertebrae observed in females (10-13 years).
• Accelerated growth in C3 cervical vertebrae observed in males (12-15 years), with no significant C4 increase.

Conclusions:

• The developed regression formulas provide an objective and reliable method for assessing skeletal maturation using cephalometric radiographs.
• Cervical vertebral bone age assessment is a viable alternative for evaluating skeletal maturity in orthodontic diagnostics.
• The formulas are applicable to the Brazilian population studied.