1. An intra-oral imaging system comprising: a manually positionable intra-oral image capture device; a display; a processor; and a non-transitory memory storing instructions that, when executed by the processor, cause the system to receive live image data of a patient from the intra-oral image capture device, display the live image data on the display, access a previously stored intra-oral image of the patient from the non-transitory memory, generate an alignment mask based on the accessed previously stored intra-oral image, display the alignment mask on the display overlaid on the live image data, capture a new intra-oral image of the patient from the live image data, and store the new intra-oral image to the non-transitory memory.