the facial index and the anterior teeth dimensions and the interrelation between them were assessed. Finally the results were correlated with recurring aesthetic dental proportion (RED). Moreover the results were statistically analyzed using the Independent t-test or an equivalent non-parametric test was used for comparison between the two groups, and the Pearson's correlation coefficient (r) test was used for correlating different parameters.

the facial index and the anterior teeth dimensions and the interrelation between them were assessed. Finally the results were correlated with recurring aesthetic dental proportion (RED). Moreover the results were statistically analyzed using the Independent t-test or an equivalent non-parametric test was used for comparison between the two groups, and the Pearson's correlation coefficient (r) test was used for correlating different parameters.

Bellus3D is a modern multi-digital digicam, 3-D face scanning that captures in an expert grade, complete 3-D face scans with the pressing of an unmarried button in seconds. It takes 10 s to create an excessive decision 3-D face scan. Bellus3D's excessive precision scanning detects the soft tissue parameters and over a hundred facial andmarks. It uses two Infrared structured light VCSEL (vertical-cavity surface-emitting laser) projectors for high-resolution face scanning. The technique of facial scanning by (Bellus3D) and measuring facial index by (Medit) software was performed following manufacture instructions , The patient's head Stabilized and aligned with the center of the face scan software (Bellus 3D) to avoid scan distortion, The head was tilted towards right and then towards left along with the face analog in the scan software combined with upward and downward movement to ensure complete detection and record of facial landmarks. Then the obj 3D file exported to Medit Software.

Assessment of facial index and facial forms:the morphological face height (n-gn) was measured as the distance between the nasal root (n: nasion) and the lowest point of the lower border of mandible in the mid-sagittal plane, (gn: gnathion), while the maximum facial width was considered as bizygomatic width (zy-zy)which was measured from the left zygion to the right zygion.All measurements were performed by a 3D face scanning software (BELLUS 3D). the overall facial form was calculated according to the formula FI = FW / FH× 100. Assessment of Maxillary Anterior Teeth Dimensions:The dimensions of Maxillary anterior teeth were measured for each case as: width and length of central, lateral and canines, in both right and left segments and inter canine distance. All dimensions were measured using scans which were taken by MEDIT i700 intraoral scanner.Correlating the results with RED proportion :The formula for determining the ideal width of the central incisor is:CIW =ICW/2 (1+RED+RED2).