[Primary treatment of cleft lip and palate. Its fundamental principles].

If the multiplicity of functional protocols of cleft lip and palate treatment has been bewildering, it is now a source of learning. The lessons we can draw from them assist us to choose the best age for the primary surgery and a chronology that prevents the palate from the worst scaring. Eventually, with 18 years of follow-up, the best functional achievement comes unexpectedly from an ambitious primary rhinoplasty that had till now been condemned. Not only do the patients have good appearance and social integration, but the nasal mode of breathing established at the time of the primary surgery favors a good facial growth without any compromise. Reciprocally, all the interacting functions benefit from a nasal ventilation.