Comment on

• Esthetic perception of black spaces between maxillary central incisors by different age groups.

  Pithon MM, Bastos GW, Miranda NS, Sampaio T, Ribeiro TP, Nascimento LE, Coqueiro Rda S. Pithon MM, et al. Am J Orthod Dentofacial Orthop. 2013 Mar;143(3):371-5. doi: 10.1016/j.ajodo.2012.10.020. Am J Orthod Dentofacial Orthop. 2013. PMID: 23452971
• Methods used to evaluate "black spaces".

  Guo Y, Bai D. Guo Y, et al. Am J Orthod Dentofacial Orthop. 2013 Jun;143(6):754. doi: 10.1016/j.ajodo.2013.04.004. Am J Orthod Dentofacial Orthop. 2013. PMID: 23726322 No abstract available.