Objective: To evaluate the thickness of facial alveolar bones around maxillary central incisors according to gender, inclination type, and to the first time with a linear value, which is Effective Length of the Premaxilla (ELP). Materials and Methods: We studied facial alveolar bones around 88 maxillary central incisors in 44 adult CBCT cases (22 females and 22 males, aged 18-40 years). The measurements were taken to the effective length of the premaxilla (ELP), the inclination of maxillary central incisors, as well as to the facial thicknesses of the alveolar crest and at each third of alveolar plates. We performed statistical comparison, thinning study of facial alveolar plates, and correlations investigation Analysis. Results: Statistically significant differences were appeared according to gender and inclination types between ELP values. High distribution of thin alveolar plates at the levels of coronal and middle thirds were found, when ELP < 13 mm. Half cases had good bone thicknesses at the level of apical third. No significant strong correlation was found between ELP and gender, alveolar plate thickness, or inclination types. Conclusion: A potential risk at the levels of coronal and middle thirds of facial alveolar plates maybe exist when moving maxillary central incisors labially, especially with decreased values of ELP (less than13 mm).