Longitudinal changes in the ANB angle and Wits appraisal: clinical implications

Area of Science:

• Dentistry
• Orthodontics
• Craniofacial Growth

Background:

• Assessing the anteroposterior apical base relationship is crucial in orthodontics.
• The ANB angle and Wits appraisal are commonly used cephalometric indicators.
• Understanding their developmental changes and correlation is important for diagnostic accuracy.

Purpose of the Study:

• To evaluate changes in the ANB angle and Wits appraisal from childhood to adulthood.
• To compare these changes between male and female subjects.
• To determine the correlation between the ANB angle and Wits appraisal during growth.

Main Methods:

• Longitudinal cephalometric analysis of 35 subjects (20 male, 15 female) aged 5 to 25 years.
• Subjects had clinically acceptable occlusions and no prior orthodontic treatment.
• Descriptive statistics and analysis of variance were employed.

Main Results:

• No significant sex-based differences were found in the changes of ANB or Wits.
• The ANB angle demonstrated significant age-related changes.
• The Wits appraisal showed no significant age-related changes, indicating a stable relationship between points A and B.

Conclusions:

• The ANB angle and Wits appraisal are significantly correlated, albeit with low r-values.
• Discrepancies between ANB angle measurements and clinical judgment can arise.
• Utilizing both ANB angle and Wits appraisal enhances the accuracy of anteroposterior apical base diagnosis.