Correlation of Wits appraisal and ANB angle to assess jaw relationship

Saira Bilal; Ahsan Mehmood Shah; Ghulam Rasool; Muhammed Saud

Correlation of Wits appraisal and ANB angle to assess jaw relationship

Authors

Saira Bilal BDS, FCPS; Department of Orthodontics, Khyber College of Dentistry.
Ahsan Mehmood Shah BDS, FCPS, MOrth Rcsed, FFD RCSI, MHR; Head of department, Associate professor, Department of Orthodontics, Khyber college of Dentistry.
Ghulam Rasool BDS, MCPS, FCPS, MHPE; Professor & Dean, Rehman College of Dentistry.
Muhammed Saud BDS, MDS; Assistant professor, Department of Orthodontics, Khyber college of Dentistry.

Keywords:

Cephalometric, sagittal dimension, sagittal jaw discrepancy, Steiner analysis

Abstract

Introduction: The relationship of Maxillary base and Mandibular base is vital while planning an orthodontic case. While assessing the anteroposterior discrepancy the frequently used angle is ANB from the Steiner’s analysis. Wit’s appraisal is used in conjunctions to see the agreement with the ANB angle. The purpose of this study was to determine whether there is any correlation between the ANB angle and the Wits appraisal among the three skeletal sagittal jaw relationships in our local population of Peshawar.

Material and methods: This cross-sectional study was conducted at the Department of Orthodontics on patients between 12-30 years of age were included in the study. Lateral cephalograms of 153 patients were obtained and the ANB angle of the Steiner’s analysis and the Wits appraisal were measured. Data were analyzed using SPSS 20. Pearson correlation test was applied and p value of less than 0.05 was considered significant.

Results: There were 67 male (43.8 %) and 86 female patients (56.2 %). Mean age was 16.4 years +3.3. Correlation analysis showed a moderate and weak correlation between the ANB angle & the Wits appraisal for skeletal class II (r=0.55) and class III (0.40), respectively. No correlation exists between the two measurements for a class I skeletal relationship (p>.05). The overall correlation between the two measurements is moderate.

Conclusions: The ANB angle & the Wits appraisal cannot substitute each other when assessing skeletal sagittal jaw relationships.