A first multitude of intraoral images of a first portion of a three-dimensional intraoral object are received. A pre-existing model that corresponds to the three-dimensional intraoral object is identified. A first intraoral image of the first multitude of intraoral images is registered to a first portion of the pre-existing model. A second intraoral image of the first multitude of intraoral images is registered to a second portion of the pre-existing model.
