Different teeth quantitative evaluation of shapes in radiographic images using program package " SHAPE ver.1.3"
| Date | Issue | Start Page | End Page |
|---|---|---|---|
2025-04-30 | 1 | 4 | 8 |
In 1998 "SHAPE ver.1.3" was developed by Assoc. Prof. Hiroyoshi Iwata for assessment of various biological shapes. We have decided to test this program in the odontology field as it is common to deal with the problem of recognizing teeth in radiographic images when teeth crowns are damaged or teeth position is changed. This can make the diagnosis and treatment more complicated. Our interest would be to create an additional and more precise teeth shape database, which could help to recognize teeth from radiograph images. This method is more precise because we draw the outer edge of the tooth shape, and other methods draw the bounding boxes around the tooth shape (Hegde et al., 2023), (Bilgir et al., 2021). Besides, creating a teeth shape database could help identify human postmortem (Nomir & Abdel-Mottaleb, 2007), (Nomir & Abdel-Mottaleb, 2005). Moreover, this program package could help us compare prostheses or dental fillings with natural teeth anatomy. Our study aimed to compare different teeth shapes (single-rooted and double-rooted) and evaluate the prosthetic quality of a lower jaw 4th quarter tooth by comparing it to the same lower jaw tooth with dental filling in the 3rd quarter. Dental radiographs of each 43rd, 45th, and 46th with dental filling, 47th and 36th with zirconia crown teeth were made with a dental X-ray machine. Afterwards, dental radiographs were processed by using the "Image-J" and "Adobe Photoshop'' programs. The methodical part was followed by Assoc. Prof. Hiroyoshi Iwata's publication with Japanese radish (Iwata et al., 2000). Images were uploaded to "SHAPE ver.1.3" software package following programs: "ChainCoder", "CHC2NEF", "PrinComp", "PrinPrint". Using the third program "PrinComp", principal components analysis was applied and harmonics were calculated for each 43rd, 45th, 46th, 47th, 36th teeth radiographic images. Eigenvalue and proportions results were calculated. 43rd teeth radiographic images 1st harmonic made up – 58,47%, 45th teeth radiographic images – 62,45%, 46th teeth radiographic images – 88,45%, 47th teeth radiographic images – 79.82% and 36th teeth radiographic images – 78.64%.