In this second part we will publish our results of the study of the correlation on a sample of the Moroccan population in order to illustrate, to compare and discuss our observations with those of the literature. The objective of our study was to evaluate the correlation between the shape of the face and that of the inverted upper central incisor. Objective: The purpose of this study was to assess the correlation between central incisor form and the inverted form of the face form in a Moroccan sample of 200 subject and to investigate if there was agreement with the Leon’s William theory. Method and materials: A total of 200 subjects of North-african ethnicity ranging between 25 and 35 years of age were selected. Digital photographic records were made, 1 full-face and 1 intraoral view of the maxillary right central incisor. The outline tracings of the tooth and face images were obtained using Key notesoftware. The outline tracings were assessed by superimposition. weclassified the central incisor forms and the face form into square, ovoid, tapering, following Williams' method of classification, and then the chi-square test was provided to study the correlation between these two forms. Results: The chi-square statistic was equal to 106.6996. The p-value is < 0.00001. The result is significant at p < .05.Which confirms the presence of high correlation between the shape of face and that of the central maxillary incisor. Conclusion: There is a highly defined correlation between central incisor form and face form in this racial group studied. So, the shape of the face can serve as a guide for the selection of prosthetic teeth, or the form of the anterior teeth in the smile design softwares.
