Occlusion alignment method and occlusion alignment apparatus
An occlusion alignment method according to the present disclosure includes: extracting at least one tooth area data from upper jaw scan data and lower jaw scan data; and adjusting an occlusion position of the upper jaw scan data and the lower jaw scan data using the at least one tooth area data.
1 . An occlusion alignment method comprising:
extracting at least one tooth area data from upper jaw scan data and lower jaw scan data; and
adjusting an occlusion position of the upper jaw scan data and the lower jaw scan data using the at least one tooth area data,
wherein the upper jaw scan data and the lower jaw scan data are aligned by at least one occlusion scan data generated by scanning an upper jaw and a lower jaw in a bite position so as to generate first alignment data, and
wherein the adjusting the occlusion position includes forming at least one line between the upper jaw scan data and the lower jaw scan data based on the tooth area data, and generating second alignment data different from the first alignment data by adjusting a distance between the upper jaw scan data and the lower jaw scan data based on a length of the line.
2 . The occlusion alignment method of claim 1 , wherein extracting the at least one tooth area data includes not extracting buccal area data of the upper jaw scan data and the lower jaw scan data.
3 . The occlusion alignment method of claim 1 , wherein extracting the at least one tooth area data includes extracting only tooth area and gingival area of the upper jaw scan data and the lower jaw scan data.
4 . The occlusion alignment method of claim 1 , wherein a plurality of the occlusion scan data are acquired, and wherein the first alignment data is generated by simultaneously aligning the plurality of the occlusion scan data, the upper jaw scan data, and the lower jaw scan data.
5 . The occlusion alignment method of claim 1 , wherein the line is formed by connecting at least one point of mesh data constituting a tooth area of at least one scan data of the upper jaw scan data and the lower jaw scan data and at least one point, which is nearest neighboring to the point, of mesh data constituting a tooth area of other scan data.
6 . The occlusion alignment method of claim 1 , wherein the line is formed by connecting at least one point of mesh data constituting a tooth area of at least one scan data of the upper jaw scan data and the lower jaw scan data and a portion at which a ray generated at the point hits a tooth area of other scan data.
7 . The occlusion alignment method of claim 1 , wherein a plurality number of the line is acquired, and
wherein adjusting the occlusion position includes selecting lines having a length equal to or below a predetermined threshold value to adjust the distance between the upper jaw scan data and the lower jaw scan data.
8 . The occlusion alignment method of claim 7 , wherein adjusting the occlusion position includes adjusting the distance between the upper jaw scan data and the lower jaw scan data so as to minimize a sum of lengths of the selected lines.
9 . The occlusion alignment method of claim 8 , wherein adjusting the occlusion position is repeatedly performed a predetermined number of times while decreasing the threshold value.
10 . The occlusion alignment method of claim 1 , further comprising: selecting at least one of the first alignment data and the second alignment data according to a predetermined criterion,
wherein the predetermined criterion is based on a first degree of separation which is a distance from at least one of the upper jaw scan data and the lower jaw scan data of the first alignment data to the occlusion scan data, and a second degree of separation which is a distance from at least one of the upper jaw scan data and the lower jaw scan data of the second alignment data to the occlusion scan data.
11 . The occlusion alignment method of claim 10 , wherein selecting the at least one of the first alignment data and the second alignment data includes selecting the second alignment data when the second degree of separation is within a predetermined multiple range of the first separation degree.
12 . An occlusion alignment apparatus comprising:
a scanning unit configured to scan an inside of an oral cavity of a patient to acquire upper jaw scan data, lower jaw scan data, and at least one occlusion scan data;
an area extraction unit configured to extract tooth area data from scan data acquired from the scanning unit; and
a compensation alignment unit configured to adjust an occlusion position of the upper jaw scan data and the lower jaw scan data using the tooth area data,
wherein the upper jaw scan data and the lower jaw scan data are aligned by at least one occlusion scan data generated by scanning an upper jaw and a lower jaw in a bite position so as to generate first alignment data, and
wherein, in the adjusting the occlusion position of the upper jaw scan data and the lower jaw scan data, the compensation alignment unit is further configured to form at least one line between the upper jaw scan data and the lower jaw scan data based on the tooth area data, and generate second alignment data different from the first alignment data by adjusting a distance between the upper jaw scan data and the lower jaw scan data based on a length of the line.
13 . The occlusion alignment apparatus of claim 12 , wherein the area extraction unit does not extract buccal area data of the upper jaw scan data and the lower jaw scan data.
14 . The occlusion alignment apparatus of claim 12 , wherein the line is formed using at least one method selected from a nearest neighboring test and a ray intersection test.
15 . The occlusion alignment apparatus of claim 12 , further comprising: a data selection unit configured to select at least one of the first alignment data and the second alignment data according to a predetermined criterion,
wherein the predetermined criterion is based on a first degree of separation which is a distance from at least one of the upper jaw scan data and the lower jaw scan data of the first alignment data to the occlusion scan data, and a second degree of separation which is a distance from at least one of the upper jaw scan data and the lower jaw scan data of the second alignment data to the occlusion scan data.
16 . The occlusion alignment apparatus of claim 15 , wherein the data selection unit selects the second alignment data when the second degree of separation is within a predetermined multiple range of the first separation degree.