Phantom model of teeth set, method of evaluating scanning precision of scanner using the same, and method of evaluating 3D printing precision using the same

1 . A phantom model of teeth set comprising:

a first base layer;

a second base layer formed on a top surface of the first base layer, such that the second base layer covers a majority of the top surface of the first base layer;

a plurality of patterns formed at both upper edges of the second base layer and configured to improve scanning accuracy; and

model teeth formed on a top surface of the second base layer, each model tooth being spaced apart from an adjacent model tooth such that the model teeth do not contact each other,

wherein a shape of each model tooth, when viewed from a front, rear, top, left, or right side, differ from a shape of any other one of the model teeth.

2 . The phantom model of teeth set of claim 1 , wherein each model tooth has a three-dimensional structure.

3 . The phantom model of teeth set of claim 1 , wherein the first base layer has a shape corresponding to a human gum.

4 . The phantom model of teeth set of claim 1 , wherein a floor area of each model tooth is greater than a top area of the respective model tooth.

5 . The phantom model of teeth set of claim 1 , wherein the first base layer, the second base layer, and the model teeth are made of metal.

6 . A method of measuring the scanning precision of a scanner, comprising:

drawing, by a CAD application, the phantom model of teeth set of claim 1 , the CAD application producing three-dimensional position data of the phantom model of teeth set;

forming a physical phantom model of teeth set using a 3D processing approach based on the phantom model of teeth set drawn by the CAD application;

acquiring first physical three-dimensional position data by scanning the physical phantom model of teeth set using a non-contact extraoral scanner; and

comparing the first physical three-dimensional position data with the three-dimensional position data produced by the CAD application to assess the scanning precision of the non-contact extraoral scanner.

7 . The method of measuring the scanning precision of a scanner of claim 6 , further including:

obtaining second physical three-dimensional position data by scanning the physical phantom model of teeth set using a contact-type extraoral scanner; and

comparing the first physical three-dimensional position data with the second physical three-dimensional position data, instead of the three-dimensional position data produced by the CAD application, to assess the scanning precision of the non-contact extraoral scanner.

8 . The method of measuring the scanning precision of a scanner of claim 6 , further including:

obtaining third physical three-dimensional position data by scanning the physical phantom model of teeth set using an intraoral scanner; and

comparing the third physical three-dimensional position data with the first physical three-dimensional position data to evaluate the scanning precision of the intraoral scanner.

9 . A method of measuring the 3D printing precision, comprising:

drawing, by a CAD program, the phantom model of teeth set of claim 1 , the CAD program producing three-dimensional position data of the phantom model of teeth set;

3D-printing, by a 3D printer, a physical phantom model of teeth set based on the phantom model of teeth set drawn by the CAD program;

collecting physical three-dimensional position data by scanning the physical phantom model of teeth set using a scanner; and

comparing the physical three-dimensional position data with the three-dimensional position data produced by the CAD program to assess the accuracy of the 3D printing.

10 . The method of measuring 3D printing precision of claim 9 , wherein the scanner is a contact type or a non-contact oral or extraoral scanner.