1. A method, comprising: receiving a first intraoral image of a first intraoral site; selecting, by a processing device, a portion of the first intraoral image depicting a portion of the first intraoral site; locking, by the processing device, at least the portion of the first intraoral image; and generating, by the processing device, a model comprising the first intraoral site based at least in part on the first intraoral image, wherein the portion of the first intraoral image is used for a first region of the model, and wherein data from one or more additional intraoral images that also depict the portion of the first intraoral site is not used for the first region of the model.