Comparative assessment of sagittal skeletal discrepancy: a cephalometric study

Area of Science:

• Orthodontics
• Cephalometric analysis
• Dental diagnostics

Background:

• Sagittal apical base relationship is crucial for orthodontic diagnosis.
• Accurate assessment of skeletal discrepancies guides treatment planning.

Purpose of the Study:

• To compare the Beta angle, ANB angle, and Wits appraisal for assessing sagittal skeletal discrepancy.
• To evaluate the reliability of the Beta angle in classifying skeletal patterns.

Main Methods:

• Lateral cephalograms of 86 young adults were analyzed.
• Participants were categorized into Class I, II, and III skeletal patterns.
• Beta angle, ANB angle, and Wits appraisal were measured and statistically analyzed.

Main Results:

• Specific Beta angle ranges were identified for Class I (26°-34°), Class II (<27°), and Class III (>32°) skeletal patterns.
• Beta angle showed homogenous variation across skeletal groups compared to ANB and Wits.
• Highly significant correlations were found between Beta angle and ANB angle (p<.001), and Beta angle and Wits appraisal (p<.01).

Conclusions:

• The Beta angle effectively classifies subjects into different skeletal patterns.
• Beta angle demonstrates a highly significant relationship with ANB angle and Wits appraisal.
• Beta angle is proposed as a more reliable tool for assessing sagittal jaw discrepancies in orthodontics.