Nadeem, A., & Al-kholani, A. (2026). Validation of a Portable Digital Skin Tone Sensor Compared to Fitzpatrick Skin Type Scale for Tooth Shade Matching in Esthetic Dentistry. Sana’a University Journal of Medicine and Health Sciences, 20(1), 485–488. https://doi.org/10.59628/jchm.v20i1.2516