Method and system of repairing oral defect model

A method of repairing an oral defect model, comprising:

• performing a three-dimensional oral defect model obtaining step to drive a scanner to scan an oral cavity to obtain a three-dimensional oral defect model message;
• performing a defect cutting line detecting step to drive a processor to detect a defect cutting line of the three-dimensional oral defect model message, and drive a displayer to display the defect cutting line, wherein the defect cutting line comprises at least one defect feature point;
• performing a defect point selecting step to select the at least one defect feature point of the defect cutting line via the displayer;
• and
• performing a smoothing step to drive the processor to perform a smoothing process at the at least one defect feature point, and convert the three-dimensional oral defect model message into a three-dimensional oral repaired model message to smooth the defect cutting line;
• wherein the defect cutting line detecting step comprises:
• performing a sight selecting step to select an abutment region of the three-dimensional oral defect model message, and observe the abutment region from a top view of the abutment region;
• performing a projecting step to project the three-dimensional oral defect model message in the abutment region to a two-dimensional plane according to the top view of the abutment region so as to form a two-dimensional projecting point set;
• performing an interpolating step to perform an orthogonal grid interpolation method at the two-dimensional projecting point set to obtain a two-dimensional concentrated projecting point set;
• and
• performing a controlling point detecting step to search a feature region with an annular shape in an equal angle and a radially way out from a departure point, and then search a plurality of triangular grids of the feature region, wherein the triangular grids are viewed as a plurality of controlling points;
• wherein the orthogonal grid interpolation method is an inverse distance weighted (IDW) method, and a dot density of the two-dimensional concentrated projecting point set is greater than a dot density of the two-dimensional projecting point set, and the departure point is determined as a model center of the two-dimensional concentrated projecting point set.

A method of repairing an oral defect model, comprising:

• performing a three-dimensional oral defect model obtaining step to drive a scanner to scan an oral cavity model to obtain a three-dimensional oral defect model message;
• performing a defect cutting line detecting step to drive a processor to detect a defect cutting line of the three-dimensional oral defect model message, and drive a displayer to display the defect cutting line, wherein the defect cutting line comprises at least one defect feature point;
• performing a defect point selecting step to select the at least one defect feature point of the defect cutting line via the displayer;
• and
• performing a smoothing step to drive the processor to perform a smoothing process at the at least one defect feature point, and convert the three-dimensional oral defect model message into a three-dimensional oral repaired model message to smooth the defect cutting line;
• wherein the defect cutting line detecting step comprises:
• performing a sight selecting step to select an abutment region of the three-dimensional oral defect model message, and observe the abutment region from a top view of the abutment region;
• performing a projecting step to project the three-dimensional oral defect model message in the abutment region to a two-dimensional plane according to the top view of the abutment region so as to form a two-dimensional projecting point set;
• performing an interpolating step to perform an orthogonal grid interpolation method at the two-dimensional projecting point set to obtain a two-dimensional concentrated projecting point set;
• and
• performing a controlling point detecting step to search a feature region with an annular shape in an equal angle and a radially way out from a departure point, and then search a plurality of triangular grids of the feature region, wherein the triangular grids are viewed as a plurality of controlling points;
• wherein the orthogonal grid interpolation method is an inverse distance weighted (IDW) method, and a dot density of the two-dimensional concentrated projecting point set is greater than a dot density of the two-dimensional projecting point set, and the departure point is determined as a model center of the two-dimensional concentrated projecting point set.