Patients with cleft lip & palate have associated nasal deformities with severity varies. Nevertheless the cleft lip & palate have been largely studied - its ethiology ,surgical corrections- some doubts about the ethilogy of the problem still without resolution. The objective of this research was to conclude if there was or not histological alterations on the alar cartilages of the cleft lip noses; we studied 36 specimens of alar cartilages from unilateral cleft lip nose , 18 specimens of the affected side and 18 specimens of the unaffected side, using a histological and morphometrical evaluations. To compare the results of the morphometrical evaluations we used the Chi- Square test (p=0.05), and the results of the histological evaluations were analyzed by the T-Student test (p=0.05). The morphometrical evaluations was done based on the model developed by Weidel in 1979 that is still being used until this days on liver and kidney biopsies. We concluded that there no histological or morphometrical differences between the two sides.
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