Automated method for generating prosthesis from three dimensional scan data, apparatus generating prosthesis from three dimensional scan data and computer readable medium having program for performing the method

An automated method for generating a prosthesis from a three dimensional (“3D”) scan data, the method comprising:

• determining a tooth number of a prepared tooth from the 3D scan data using a first artificial intelligence neural network;
• determining a margin line of the prepared tooth using a second artificial intelligence neural network;
• generating an intermediate surface of the prosthesis extending toward an outside of the prepared tooth from the margin line of the prepared tooth;
• generating an inner surface of the prosthesis by determining a gap from a surface of the prepared tooth;
• generating an outer surface of the prosthesis using a third artificial intelligence neural network;
• and
• connecting the outer surface of the prosthesis and the intermediate surface of the prosthesis,
• wherein an intermediate surface direction vector is determined by rotating a first direction vector with respect to a second direction vector according to the angle condition, and
• wherein the first direction vector of a margin line point in the margin line is a normal vector of a mesh of the 3D scan data including the margin line point.

An apparatus for automatically generating a prosthesis from a three dimensional (“3D”) scan data, the apparatus configured to:

• generate an intermediate surface of the prosthesis extending toward an outside of a prepared tooth from a margin line of the prepared tooth in the 3D scan data;
• generate an inner surface of the prosthesis by determining a gap from a surface of the prepared tooth;
• generate an outer surface of the prosthesis;
• and
• connect the outer surface of the prosthesis and the intermediate surface of the prosthesis,
• wherein an intermediate surface direction vector is determined by rotating a first direction vector with respect to a second direction vector according to the angle condition, and
• wherein the first direction vector of a margin line point in the margin line is a normal vector of a mesh of the 3D scan data including the margin line point.

A non-transitory computer-readable storage medium having stored thereon program instructions, the program instructions executable by at least one hardware processor to:

• generate an intermediate surface of a prosthesis extending toward an outside of a prepared tooth in a three dimensional (“3D”) scan data from a margin line of the prepared tooth in the 3D scan data;
• generate an inner surface of the prosthesis by determining a gap from a surface of the prepared tooth;
• generate an outer surface of the prosthesis;
• and
• connect the outer surface of the prosthesis and the intermediate surface of the prosthesis,
• wherein an intermediate surface direction vector is determined by rotating a first direction vector with respect to a second direction vector according to the angle condition, and
• wherein the first direction vector of a margin line point in the margin line is a normal vector of a mesh of the 3D scan data including the margin line point.