IADR Abstract Archives

DIAGNOSTIC ABILITY OF ANB AND WITS APPRAISAL FOR SKELETAL CLASS II

Objectives: Different cephalometric analyses have been presented to diagnose the anteroposterior relationship of the jaws. However, all have some shortcomings and no analysis has yet been developed with absolute accuracy. The present study assessed diagnostic ability of ANB angle and Wits appraisal in classification of skeletal class II pattern in patients with deficient mandibles.

Methods: This diagnostic study was carried out using 60 cephalograms of patients with a class II skeletal pattern, aged 9-17 years old, who were referred to Shahid Beheshti Dental School in Tehran. Assessments were carried out according to gold standards by three orthodontists. Patients’ cephalograms were traced, and angular and linear measurements of SNA, SNB, ANB, Wits, SN, SN-MeGo, FMA, Jarabak index, Basal and Sum of posterior angles were calculated. The ROC curves were plotted for two measures of Wits and ANB, in the case of FHP/SN = 6 and areas under the curves were determined. Any correlation between the two analyses was assessed using Pearson Coefficient statistical analysis.

Results: The values for ANB angle and Wits appraisal in the studied specimens were 5.89 ± 2.2 and 4.02 ± 2.96 respectively. The area under the ROC curve for ANB angle was 0.493 and 0.6 for Wits appraisal. Therefore, Wits appraisal was more accurate than ANB angle in diagnosing skeletal class II patients. Furthermore, significant correlations were found between the two analyses (P<0.0001).

Conclusion: The present study demonstrated that Wits appraisal was more critical than ANB angle in the diagnosis of patients with class II skeletal pattern with deficient mandibles.

Keywords: Wits appraisal, ANB angle, Diagnostic ability.

Iranian Division Meeting
2010 Iranian Division Meeting (Tehran, Iran)
Tehran, Iran
2010
2010006
Oral and Poster Presentations
  • Eslamian L,
  • Nokhbe Za’eem M,
  • Kheirieh P,
  • Najafi B,
    • Oral and Poster Presentations