Predictors of changes in incisor inclination during orthodontic levelling and alignment with fixed appliances: a retrospective cross-sectional study

Regression equations with specific clinical and cephalometric parameters are suitable to predict the degree of incisors' inclination changes during alignment with fixed appliances. The amount of anterior crowding and the initial incisors' inclination of the respective jaw were relevant in all three formulas. Using the predictors may reduce undesired excessive inclination changes and help in individualised treatment planning. However, as more than 50% of the variance are explained by other factors, they act as an adjunctive method to the remaining procedures of treatment planning.