title: Comparative assessment of sagittal skeletal discrepancy: a cephalometric study.
abstract: OBJECTIVE
  Evaluating the sagittal apical base relationship during orthodontic diagnosis and treatment planning is an important step. This study was aimed at comparison of Beta angle, ANB angle and Wit's appraisal for assessment of sagittal skeletal discrepancy.
  
  
  METHODS
  Eighty six young adults (43 female and 43 male) were selected from the patient's reporting to Department of Orthodontics, College of Dental Sciences, Davangere, India. Family lineage was studied to know the nativity of Davangere. The standardized pre-treatment lateral cephalogram of the chosen sample was traced. The sample was divided into three skeletal pattern groups: Class I, Class II and Class III, based on the ANB angle and profile, Beta angle was assessed in each group.
  
  
  METHODS
  The data was subjected to statistical analysis student's t-test, ANOVA test and correlation and regression analysis, using the software namely SPSS Software version 13. Microsoft word and Excel were used to generate graphs and tables.
  
  
  RESULTS
  In the local Davangere population, Class I skeletal pattern group exhibited Beta angle between 26°-34°, Beta angle less than 27° was found in Class II skeletal pattern, and Beta angle greater than 32° was seen Class III skeletal pattern. The coefficient of variation of Beta angle in all the three groups was significantly homogenous compared to ANB angle and Wits appraisal. The correlation and regression analysis of the total sample indicated a highly significant correlation between Beta angle and ANB angle (p<.001), and between Beta angle and Wits appraisal (p<.01).
  
  
  CONCLUSIONS
  Beta angle can be used to classify subjects into different skeletal patterns. The Correlation and regression analysis for the total sample suggests a highly significant relation between Beta angle and ANB angle and, between Beta angle and Wits appraisal. It can be more reliably used to assess sagittal jaw discrepancies than ANB angle and Wits appraisal.
authors.affiliation: Reader, Department of Orthodontics, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: P
authors.initials: P
authors.lastname: Aparna
authors.affiliation: Reader, Department of Orthodontics, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: Dilip N
authors.initials: DN
authors.lastname: Kumar
authors.affiliation: Professor and Head, Department of Orthodontics, Narayana Dental College , Nellore, Andhra Pradesh, India .
authors.forename: Mandav
authors.initials: M
authors.lastname: Prasad
authors.affiliation: Professor, Department of Orthodontics, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: Naveen
authors.initials: N
authors.lastname: Shamnur
authors.affiliation: Professor and Head, Department of Orthodontics, Sharavathi Dental College , Shivamoga, Karnataka, India .
authors.forename: Arun Kumar
authors.initials: AK
authors.lastname: G
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Surgery, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: Sridhar
authors.initials: S
authors.lastname: K R
authors.affiliation: Assistant Professor, Department of Orthodontics, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: Gopal Krishna
authors.initials: GK
authors.lastname: B R
authors.affiliation: Assistant Professor, Department of Orthodontics, College of Dental Sciences , Davangere, Karnataka, India .
authors.forename: Neeraj
authors.initials: N
authors.lastname: Gupta
keywords: ANB angle; Beta angle; Orthodontic diagnosis; Sagittal discrepancies; Skeletal pattern; Wits appraisal