Comparative analysis of the use of ANB angle and Wits appraisal for determination of the saggital jaw relationship.

Abstract

Introduction: Finding a simpler and more accurate approach for the analysis of sagittal relations of jaws is a big challenge. The choice is not simple, due to the variability of the points on which the ANB angle is based, which leads to the usage of an additional linear parameter such as Wits. Objective: To observe the daily involvement of the Wits appraisal and its correlation with the ANB angle, as well as to show the justification of the usage of the Wits appraisal, its stability, and modifications for obtaining a comprehensive diagnostic image. Material and methods: Literature reviews and analysis were performed by the research network ResearchGate, Academia.edu and PubMed, by searching for papers not older than 2000, with the keywords Wits appraisal, Steiner cephalometric analysis, Orthodontic cephalometry and literature from books and contemporary journals publication. Results: The variable position of the points that determine the ANB angle showed the justification for the additional use of the Wits appraisal, and a correlation was observed in normodivergent patients. The influence of the occlusal plane position on the Wits noted its disadvantage and its modification requirement in patients with increased lower face height and high FMA angle. Conclusion: Sagittal jaws relations analysis should take into consideration additional factors such as the size of the FMA angle, the inclination of the occlusal and the mandibular plane, the vertical growth. If necessary, the modification of the Wits appraisal can be used.