**4.6 Limitation of this study**

Our study was a retrospective monocentric study for the evaluation of the quality of life in patients with cleft lip or labial palate and their parents. This is justified by the difficulty of accessing this particular population; in general, these anomalies affect with disparity a population with an unfavorable socio-economic and cultural context. On the other hand, a prospective longitudinal study with an evaluation at the beginning and at the end of treatment and long-term follow-up with a comparison group of children without CL and CLP would have been more relevant.
