Aim: This study evaluated Tweed’s facial triangle in various racial groups, including Sudanese, Black African, Black American, East Asian, and Caucasian populations with normal occlusion.

Material and Method: Using 29 cephalometric radiographs from Sudanese patients aged 18-25 with class I malocclusion.

Result: The analysis revealed significant differences in facial angles among these groups. Notably, increased proclination of lower incisors was observed in Sudanese, Arabs, East Asians, and African-descended populations.

Conclusion: The findings highlight the importance of incorporating ethnic-specific cephalometric norms into orthodontic practice for accurate diagnosis and effective treatment planning.