Othman, R. J. and Alkhashan, J. A. (2020) “Mesiodistal Crown Diameter of Normal Occlusion and Different Malocclusion Groups for a Sample of Kurdish Population of Erbil City”, Polytechnic Journal, 10(1), pp. 32-37. doi: 10.25156/ptj.v10n1y2020.pp32-37.