title: Evaluation of relationship between cranial base angle and maxillofacial morphology in Indian population: A cephalometric study.
abstract: OBJECTIVE
  To investigate the role played by the cranial base flexure in influencing the sagittal and vertical position of the jaws in Indian population.
  
  
  METHODS
  Lateral cephalograms of 108 subjects were divided into three categories (Group A: NSAr > 125°, Group B: NSAr-120°-125°, Group C: NSAr < 120°) according to value of NSAr. Measurement of eight angular (SNA, SNB, NPg-FH, ANB, NAPg, SN-GoGn, Y-Axis, ArGo-SN) and seven linear (N-S, S-Ar, Ar-N, Ar-Pt A, Ar-Gn, Wits appraisal, N- Pt A) variables were taken.
  
  
  RESULTS
  Pearson correlation coefficient test was used to individually correlate angular and linear variables with NSAr for the whole sample as well as in individual group. Unpaired t-test was used to analyze the difference in the means of all the variables between the three groups. Significance was determined only when the confidence level was P < 0.05. Several parameters (SNB, NAPg, ANB, Y-Axis, GoGn-SN) showed significant positive correlation while others showed negative correlation (SNA, NPg-FH, N-S) with NSAr.
  
  
  CONCLUSIONS
  This study show cranial base angle has a determinant role in influencing the mandibular position and it also affects both the mandibular plane angle and y-axis. Flattening of the cranial base angle caused a clockwise rotation of the mandible. The jaw relation tends to change from class III to class II, with progressive flattening of the cranial base and vice-versa.
authors.affiliation: Department of Orthodontics, Government Dental College and Hospital, Ahmedabad, Gujarat, India.
authors.forename: Amit
authors.initials: A
authors.lastname: Bhattacharya
authors.affiliation: Department of Orthodontics, College of Dental Sciences and Research Center, Ahmedabad, Gujarat, India.
authors.forename: Amarjitsingh
authors.initials: A
authors.lastname: Bhatia
authors.affiliation: Department of Orthodontics, AMC Dental College and Hospital, Ahmedabad, Gujarat, India.
authors.forename: Dolly
authors.initials: D
authors.lastname: Patel
authors.affiliation: Department of Orthodontics, Ahmedabad Dental College and Hospital, Ahmedabad, Gujarat, India.
authors.forename: Nishit
authors.initials: N
authors.lastname: Mehta
authors.affiliation: Department of Orthodontics, Government Dental College and Hospital, Ahmedabad, Gujarat, India.
authors.forename: Harshik
authors.initials: H
authors.lastname: Parekh
authors.affiliation: Department of Orthodontics, Government Dental College and Hospital, Ahmedabad, Gujarat, India.
authors.forename: Rahul
authors.initials: R
authors.lastname: Trivedi
keywords: Cranial base angle; lateral cephalogram; maxilla-mandibular relationship; skeletal pattern; treatment planning