Assessment of Beta Angle among the various Facial Types in Garhwali Population - A Cephalometric Evaluation

Abstract

Objective: The purpose of the study was to evaluate Beta (β) angle variation in different facial types among Garhwali population and also to evaluate the differences in Beta angle in male and female subgroups. Materials & Method:The sample included pre-treatment lateral cephalograms of 90 native Garhwali subjects (age 16-24 years) who were divided into three groups: normodivergent, hypodivergent and hyperdivergent; of 30 subjects of each group 15 were male and 15 were female. Result:In Garhwali population subjects with a β angle between 28° to 32° have a normodivergent facial type (ANOVA p < 0.01). Conclusion:There is a significant difference in the mean values of β angle in Garhwali population among various facial types.Key words: Beta angle, hyperdivergent, hypodivergent, normodivergent ABSTRACT IntroductionOver the years diagnosis and treatment planning in orthodontics and dentofacial orthopaedics have relied substantially on technological and mechanical aids. These technological aids include imaging, articulators, jaw tracking and functional analyses. The goal in using these techniques is to accurately replicate or portray the "anatomic truth" to show the three dimensional anatomy in both static and dynamic function as it exists in nature. Imaging is one of the most ubiquitous tools orthodontists use to measure and record the size and form of craniofacial structures. Imaging has traditionally been used to record the status quo of limited or grouped anatomic structures. Any cephalometric analysis based on either angular or linear measurements has various shortcomings. Reliability of these parameters is questionable due to problems encountered in identification, reproducibility and effects of changes in occlusion and rotation of jaws during growth. 5 This angle does not depend on any cranial landmarks or dental occlusion and reflects true antero-posterior changes as a result of growth and orthodontic intervention. Furthermore, it is not influenced by changes in occlusion thus it would be Dr P Narayana Prasad, 1 Dr Rubina Ansari, 2 Dr Tarun Rana, 3 Dr Nimme Rawat 4

The Analysis of Interincisal and Vertical Angles on Convex Facial Profile According to Steiner (Study of Javanese Orthodontic Patients in Banyumas Regency)

“…According to Steiner, the normal value of the GoGn-SN angle is 32 o ± 2 o . A GoGn-SN angle <30 o indicates a hypodivergent face, while a GoGn-SN angle >34 o shows a hyperdivergent face (Graber et al, 2017;Prasad et al, 2013;Yemitan, 2018). Samreen khatoon et al (2018) stated that the interincisal angle could affect the vertical height of the face.…”