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Year : 2018  |  Volume : 9  |  Issue : 4  |  Page : 141-144

Norms for anterior–posterior assessment of jaw relationship in Maharashtra population

Department of Orthodontics and Dentofacial Orthopedics, V. Y. W. S. Dental College, Amravati, Maharashtra, India

Correspondence Address:
Niyati B Potode
P. G. Student, Department of Orthodontics and Dentofacial Orthopedics, V. Y. W. S. Dental College 7 Hospital, Wadali, Camp, Amravati, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijor.ijor_15_18

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Background: Regularly used parameters for anteroposterior assessment of jaw relationships are ANB angle and Wits appraisal, and recently, beta angle, Yen angle, and W angle are introduced. ANB angle depends on the cranial landmarks and is affected by various factors and often can be misleading. The Wits appraisal does not depend on cranial landmarks, but still has the problem of correctly identifying the functional occlusal plane, which can sometimes be impossible. To overcome these problems, a new measurement, beta angle, was developed at Tufts University. The present study was carried out on Maharashtra population to derive norms of beta angle. Materials and Methods: For selection of sample, the lateral cephalograms were selected from the available patient's records, and the sample was divided into three groups based on the ANB angle, Wits appraisal, and profile. Conclusion: The norms of beta angle are between 28.5° and 36.5° in skeletal Class I pattern, <28.5° in skeletal Class II pattern, and >36.5° in skeletal Class III pattern.

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