Calidad del ángulo ANB como prueba diagnóstica de la relación intermaxilar, artículo de revisión.

Abstract

Introduction: The diagnostic test confirms the existence or not of a disease and guides a definitive diagnosis and treatment. The most widely used and most reliable intermaxillary relationship test is the ANB angle. Norm value of 2º +- 2º. Objective: To analyze the quality of a good diagnostic test, validity criteria, factors that affect the objectivity of the ANB angle and alternative tests. Materials and methods: Search for scientific articles published since 2010, PICO analysis, metasearch, Web of Sciences, Pubmed, Google Scholar, Scielo and Cochrane Library. Results: The characteristics of a good diagnostic test are: validity, concordance and consistency. Criteria that evaluate the quality of the test are: sensitivity and specificity, positive and negative predictive value, positive and negative likelihood ratio. Factors that alter the quality of the ANB angle: rotation of the Nasion anatomical point, inclination of the occlusal, palatal and mandibular planes, distance A.B; the facial biotype and age of the patient. Alternative tests are indicated: Wits appraisal, FABA angle and Ricketts facial convexity. Conclusion: The ANB angle is very reliable, but susceptible to factors that alter it. They are alternative tests that have a good to very good correlation with the ANB angle: Ricketts facial convexity, FABA angle and Wits appraisal for the diagnosis of intermaxillary discrepancy.