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Investigation on dose assessment and image quality evaluation of selected dental fillings in dental radiography
Poster Title: Investigation on dose assessment and image quality evaluation of selected dental fillings in dental radiography
Submitted on 03 Dec 2020
Author(s): Mohamad Feriza, N.A.N.1, Yahaya, A.N.1, Md Radzi, Y.1, Ramli, R.M.1
Affiliations: 1School of Physics, Universiti Sains Malaysia, Penang, Malaysia
This poster was presented at 20th Asia-Oceania Congress on Medical Physics (AOCMP)
Poster Views: 166
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Poster Information
Abstract: Introduction: Dental radiography accounts for the most examination perform in diagnostic x-ray imaging by giving small dose of ionizing radiation to produce image of the internal structure of the mouth. Variation of tube voltage affects the radiation dose delivered which correspond to biological risks to adjacent soft tissues and image quality produced. Hence, optimum tube voltage is needed for producing good quality of dental radiograph with the lowest possible of absorbed dose by the oral sensitive tissues.
Purpose: This study was to investigate the optimisation parameter between the absorbed dose and image quality assessment on selected dental fillings (composite and amalgam) under the diagnostic x-ray range and estimate dose absorbed by the surrounding vital oral soft tissues.
Methods: Studies were conducted by using two types of dental fillings (amalgam and composite) embedded in a teeth model that was attached with borax slime to represent the surrounding tissues (tongue and lips). Absorbed dose measurement was performed by varying tube voltage potential using calibrated Thermoluminescence (TLD) detector chips were placed on the dental fillings and the soft tissues. by each of the material and analysing the image quality produced in terms of optical density and signal-to-noise-ratio. Evaluation of image quality in terms of signal-to-noise ratio (SNR) and optical density (OD) were observed respectively.
Results: The absorbed dose to the dental fillings was increased as kVp increased. A similar trend was observed in the estimation of dose absorbed by the adjacent soft tissues created within the teeth model. For image quality assessment, the optical density seemed to be increased as the kVp increased while the signal-to-noise ratio decreased as the kVp increased.
Conclusion: It is essential to determine the optimum tube voltage for good image quality while sparing healthy oral soft tissues like lips and tongue.
Summary: This poster was regarding the investigation of dose and image quality for different dental fillings during dental radiography. This poster has been presented virtually during the previous 20th AOCMP on 3-5 Dec 2020 in Phuket Thailand.References: 1) Nassef, M. H. (2017). Image Quality Assessment and Radiation exposure in Intra Oral Dental Radiography. (02), 9–10

2) Schwendicke, F. (2018). Removing Carious Tissue: Why and How? Monographs in Oral Science, 27, 56–67.

3) Tibau, A. V., & Grube, B. D. (2019). Mercury contamination from dental amalgam. Journal of Health & Pollution, 9(22).
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