Methods: In this cross-sectional descriptive study, 88 cleft lip and palate patients (33 females, 55 males) with good dental casts and panoramic views were selected from some orthodontic clinics in Tehran, Iran. The mesiodistal width of the permanent maxillary incisors were calculated on the patients’ study casts and abnormalities of the number, tooth impaction or erupting teeth determined by panoramic radiographies. The data were intered in SPSS (version 17)software.
Results: Sixty six individuals (25 females, 41 males) had unilateral and 22 individuals (8 females, 14 males) had bilateral cleft lip and palate. The mean mesiodistal width of the right and left centrals and laterals of the cleft lip and palate patients were 8.3, 8.28, 6.22 and 6.22 respectively. Seventy-three individuals (82.9%) showed dental missing in the centrals or laterals with the highest values in the left laterals (39 cases). Supernumerary teeth were observed in 5 patients (5.7%) and erupting teeth in 10 patients (11.4%).
Conclusions: The size of the permanent maxillary incisors in the cleft lip and palate patients were smaller than the standard norms of the society which should be considered for orthodontic treatment. The number of missing teeth was very high in comparison with the supernumerary teeth.