Abstract: According to some embodiments of the invention, it is provided a method of generating a 3D model of a first denture and of a second denture comprising: x-ray scanning the first and the second dentures in occlusion conditions to obtain a set of data; generating, from the obtained set of data, a 3D image of the first and the second dentures in occlusion conditions, the generated 3D image comprising voxels; classifying each of voxels of the generated 3D image as belonging to the first denture, the second dentures, or space between the first and the second dentures; and generating, from the classified voxels, a 3D model of the first denture and of the second denture, wherein classifying a voxel of the generated 3D image is based on characteristics of neighboring voxels in the generated 3D image, according to an iterative analysis of voxels from neighbor to neighbor.