Congenitally missing teeth and labio-palatal clefts: keep to the left Olivier Matern, Erik-André Sauleau, Pascal Tschill, Bruno Grollemund and Fabienne Perrin-Schmitt J Dentofacial Anom Orthod, 15 4 (2012) 404 Published online: 09 November 2012 DOI: 10.1051/odfen/2012304