A method of crack detection based on digital image correlation for simulated cracked tooth

BMC Oral Health

Guanghua Ge¹  Danying Chen²  Yadong Tang³  Wenlong Wang⁴  Juncheng Guo⁴  Chunliang Zhang⁴  Diwei Mo⁴  Shangbin Long⁴  Houyao Zhu⁴ 

[1] Department of Dentistry, Hospital of Guangdong University of Technology, Guangdong University of Technology;Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology;School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology;School of Mechanical and Electrical Engineering, Guangzhou University;

关键词: Imaging diagnosis;    Cracked tooth;    Non-contact measurement;   

DOI  :  10.1186/s12903-021-01897-2

来源: DOAJ

【 摘 要 】

Abstract Background Early clinical cracked tooth can be a perplexing disorder to diagnose and manage. One of the key problems for the diagnosis of the cracked tooth is the detection of the location of the surface crack. Methods This paper proposes an image-based method for the detection of the micro-crack in the simulated cracked tooth. A homemade three-axis motion platform mounted with a telecentric lens was built as an image acquisition system to observe the surface of the simulated cracked tooth, which was under compression with a magnitude of the masticatory force. By using digital image correlation (DIC), the deformation map for the crown surface of the cracked tooth was calculated. Through image analysis, the micro-crack was quantitatively visualized and characterized. Results The skeleton of the crack path was successfully extracted from the image of the principal strain field, which was further verified by the image from micro-CT. Based on crack kinematics, the crack opening displacement was quantitatively calculated to be 2–10 µm under the normal mastication stress, which was in good agreement with the value reported in the literature. Conclusions The crack on the surface of the simulated cracked tooth could be detected based on the proposed DIC-based method. The proposed method may provide a new solution for the rapid clinical diagnosis of cracked teeth and the calculated crack information would be helpful for the subsequent clinical treatment of cracked teeth.

【 授权许可】

Unknown