Terahertz pulsed imaging study of dental caries

Current diagnostic techniques in dentistry rely predominantly on X-rays to monitor dental caries. Terahertz Pulsed Imaging (TPI) has great potential for medical applications since it is a nondestructive imaging method. It does not cause any ionization hazard on biological samples due to low energy of THz radiation. Even though it is strongly absorbed by water which exhibits very unique chemical and physical properties that contribute to strong interaction with THz radiation, teeth can still be investigated in three dimensions. Recent investigations suggest that this method can be used in the early identification of dental diseases and imperfections in the tooth structure without the hazards of using techniques which rely on x-rays. We constructed a continuous wave (CW) and time-domain reflection mode raster scan THz imaging system that enables us to investigate various teeth samples in two or three dimensions. The samples comprised of either slices of individual tooth samples or rows of teeth embedded in wax, and the imaging was done by scanning the sample across the focus of the THz beam. 2D images were generated by acquiring the intensity of the THz radiation at each pixel, while 3D images were generated by collecting the amplitude of the reflected signal at each pixel. After analyzing the measurements in both the spatial and frequency domains, the results suggest that the THz pulse is sensitive to variations in the structure of the samples that suggest that this method can be useful in detecting the presence of caries.


Terahertz pulsed imaging for the monitoring of dental caries: a comparison with X-ray imaging
Karagöz, Burcu; Altan, Hakan (2017-06-29)
Dental caries in sliced samples are investigated using terahertz pulsed imaging. Frequency domain terahertz response of these structures consistent with X-ray imaging results show the potential of this technique in the detection of early caries.
Analysis of Confidence Levels and Application Success Rates in Simulator-Based Dental Anesthesia Education Among Undergraduate Dental Students
Vural, Çağıl; Bozkurt, Poyzan; Vardar Acar, Ceren; Üçok, Cahit (2021-06-01)
Purpose: We investigated the confidence levels of undergraduate dental students who used dental anesthesia simulators and patient reports of undergraduate dental students' confidence levels in delivering anesthesia injections, in comparison with undergraduate dental students who did not use dental anesthesia simulators. We also investigated application success rates. Materials and Methods: The study was carried out in the dental anesthesia simulator laboratory and in the faculty clinics of the Faculty of De...
Evaluation of Threshold Values for Root Canal Filling Voids in Micro-CT and Nano-CT Images
Orhan, Kaan; Jacobs, Reinhilde; Celikten, Berkan; Huang, Yan; de Faria Vasconcelos, Karla; Nicolielo, Laura Ferreira Pinheiro; Buyuksungur, Arda; Van Dessel, Jeroen (Hindawi Limited, 2018-7-16)
While several materials and techniques have been used to assess the quality of root canal fillings in micro-CT images, the lack of standardization in scanning protocols has produced conflicting results. Hence, the aim of this study was to determine a cutoff voxel size value for the assessment of root canal filling voids in micro-CT and nano-CT images. Twenty freshly extracted mandibular central incisors were used. Root canals were prepared with nickel titanium files to an ISO size 40/0.06 taper and then fil...
Additional studies on the distribution of stresses during vertical compaction of gutta-percha in the root canal
Telli, C; Gulkan, P; Raab, W (1999-07-10)
Objective This study was designed to investigate the effect of certain pathological alterations of the dental structures (diminishing bone support, internal resorption, root perforation, periapical lesion) on stress distribution during root canal filling procedures by the warm vertical compaction technique.
Design and mechanical analysis of a new dental implant that would mimic natural tooth with a periodontal ligament
Pektaş, Ömer; Tönük, Ergin; Department of Mechanical Engineering (2012)
Dental implant is an artificial dental root that is used to construct dental restorations, similar to the original teeth, in order to regain the function of missing teeth of patients experiencing tooth loss. At the interface between the jawbone and the roots of natural teeth, a thin, elastic, shock absorbing tissue, called the periodontal ligament (PDL), forms a cushion which provides certain mobility to the natural teeth. The restorations supported by dental implants, however, involve completely rigid stru...
Citation Formats
B. Karagöz and H. Altan, “Terahertz pulsed imaging study of dental caries,” 2015, vol. 9542, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40910.