Alignment of digital representations of patient dentition

A non-transitory computer readable medium storing executable computer program instructions to provide aligning at least two digital representations of at least a portion of a patient's dentition, the computer program instructions comprising instructions for:

• receiving a two dimensional (“2D”) digital image comprising at least a portion of a person's dentition;
• receiving a three dimensional (“3D”) digital surface model of the person's dentition;
• receiving one or more 3D digital surface model key points selected on the 3D digital surface model;
• receiving one or more corresponding 2D digital image key points selected on the 2D digital image;
• and
• fitting a camera model using the one or more 3D digital surface model key points and the one or more corresponding 2D digital image key points to align the 3D digital surface model with the 2D digital image.

A system for aligning at least two digital representations of at least a portion of a patient's dentition, the system comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium comprising instructions executable by the processor to perform steps comprising:
• receiving a two dimensional (“2D”) digital image comprising at least a portion of a person's dentition;
• receiving a three dimensional (“3D”) digital surface model of the person's dentition;
• receiving one or more 3D digital surface model key points selected on the 3D digital surface model;
• receiving one or more corresponding 2D digital image key points selected on the 2D digital image;
• and
• fitting a camera model using the one or more 3D digital surface model key points and the one or more corresponding 2D digital image key points to align the 3D digital surface model with the 2D digital image.