Assessing the predictability of the P-NB and 1-NB values by the Steiner’s cephalometric analysis

Célia Regina Maio PINZAN, Arnaldo PINZAN, Marcos Roberto de FREITAS, José Fernando Castanha HENRIQUES, Márcio Rodrigues de ALMEIDA

The Steiner´s cephalometric analysis has been clinically used worldwide and since its irst introduction in the literature, the P-NB rationale has deemed to be essential to properly match all measures at the end of the treatment. However, the factors upon which it is estimated has so far remained uncertain and no guidelines concerning the clinical experience, growth and heredity have yet been determined. Hence, this study aims to investigate both P-NB and 1-NB predictability by the Steiner´s cephalometric analysis. The sample, comprising 148 Brazilian teenagers treated at Bauru Dental School, was divided into 3 groups according to their facial growth pattern: horizontal, well balance and vertical. The P-NB and 1-NB values, attributed at the analysis individualization, were either compared to those found at the end of the treatment, and to the values achieved 4 years and 9 months posttreatment. This investigation shed the following indings: 1) The estimated P-NB values were found to be higher than those achieved after the treatment, specially for the horizontal and well balanced groups, but demonstrated to nearly equal those obtained 4 years posttreatment. 2) Only in the vertical group, the estimated 1-NB values were signiicantly lower than those found at the end of the treatment. When comparing to posttreatment values in the long-term, differences for the well balanced and vertical groups could be attained.

Keywords: Cephalometry. Orthodontic corrective.

Saturday, December 28, 2024 23:22