The Journal of Indian Orthodontic Society, January-March 2014;48(1):33-4133Cephalometric Assessment of Sagittal Dysplasia: A Review of Twenty-One Methods1Vinay Kumar, 2Shobha SundareswaranABSTRACTThe anteroposterior discrepancy is usually of utmost concern to patients and parents and hence has received maximum attention in orthodontics. A number of analyses have been proposed over the years with varying degrees of reliability and success in assessing sagittal jaw relationships. It is absolutely essential that a clinician be aware of a range of analyses to be used in different situations. This review provides an insight into the various cephalometric methods used for evaluation of the anteroposterior jaw relationship in chronologic order and their clinical implications in contemporary orthodontics.Keywords: Sagittal dysplasia, Anteroposterior discrepancy, Cephalometric analysis.How to cite this article:Kumar V, Sundareswaran S.Cephalometric Assessment of Sagittal Dysplasia: A Review of Twenty-One Methods. J Ind Orthod Soc 2014;48(1):33-41.Source of support: NilConflict of interest: NoneReceived on:25/5/13Accepted after Revision: 20/6/13INTRODUCTIONAfter the discovery of cephalometrics in 1931, it has been adapted as an important clinical tool for assessment of jaw relationship in all three planes–anteroposterior, transverse and vertical being an integral part of orthodontic treatment planning. The sagittal relationship is usually of utmost concern to the patient and needs a critical evaluation. Previously established parameters such as the ANB angle,1Wits analysis,2AF-BF,3APDI,4Beta angle,5Yen angle,6W angle,7and the recently introduced Pi analysis8 have been defined and used effectively for the evaluation of anteroposterior (AP) discrepancies affecting the apical bases of the jaws. These analyses have both advantages and inaccuracies associated with their use which needs to be understood.ORIGINAL ARTICLE1Resident, 2Professor and Head1,2Department of Orthodontics, Government Dental College Calicut, Kerala, IndiaCorresponding Author: Shobha Sundareswaran, Professor and Head, Department of Orthodontics, Government Dental College Calicut, Kerala, India, e-mail: [email protected]10.5005/jp-journals-10021-1215There are obvious shortcomings for both angular and linear measurements, which have been comprehensively discussed in the literature.9,10Cranial reference planes such as the Frankfort horizontal and Sella-Nasion line have been used in the determination of jaw dysplasia. Extracranial measurements, independent of cranial reference planes or dental occlusion reflecting true sagittal relationship have also been used. The purpose of this review is to discuss various angular and linear geometric parameters for assessment of sagittal jaw relationship in chronologic order and their clinical implications in contemporary orthodontics.