Paranhos, L. R., Jóias, R. P., Velasco, L. G., Bérzin, F., & Daruge Júnior, E. (2015). Prevalence of the different maxillary central incisor shapes in individuals with natural normal occlusion. Brazilian Journal of Oral Sciences, 9(2), 104–107. https://doi.org/10.20396/bjos.v9i2.8641865