Mohammed, Mahmud, Ab. Rahman, Norma, and Samsudin, Ahmad Hadif Zaidin (2019) Effect of Metal Artefact from Metallic Fixed Orthodontics Auxiliary Appliances in Craniofacial Anatomical Computed Tomography (CT) Images. In: Abstracts from 18th Annual Scientific Meeting and 20th Annual General Meeting of IADR Malaysian Section. O-12. p. 125. From: 18th Annual Scientific Meeting and 20th Annual General Meeting of IADR Malaysian Section, 30 March 2019, Subang Jaya, Selangor, Malaysia.

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Abstract

Craniofacial CT scan performed during orthodontics treatment comprised of fixed metal auxiliaries may produce an artefact in the CT images which may hamper the overall diagnosis. Objectives: The aim of the study was to assess and quantify the artefact from different types of metallic fixed orthodontics auxiliary appliances in conventional craniofacial anatomical CT images. Methodology: This is a prospective in-vitro crosssectional study. Six different types of metallic fixed orthodontics auxiliary appliances which is most commonly used by the orthodontists during the fixed orthodontic treatment were consecutively placed into a cadaveric skull head in combination with the orthodontic brackets. All scan was performed by a single operator using the same CT machine (TOSHIBA CGGT-032A) with a standard scanning protocol (kvp-120, exposure time-500, xray tube-200, slice thickness 1mm). Artefact score for all data sets was quantified by calculating the standard deviation (SD) of the grey values within the dataset according to the method described by Pauwel et. al. (2007). The mean artefact score for all the data sets was presented in percentage of maximum standard deviation. A higher percentage indicating a high artefact score. One-way ANOVA Bonferroni test was used for the data analysis. The level of significance (p) was set at 0.05. Result: The mean values of the artefact score for different types of metallic fixed orthodontics auxiliary appliances were (7.444) for expansion screw, transpalatal arch (6.946), lingual arch (6.849), nance button (6.719), quadhelix (6.652) and anterior bite plane (6.647) respectively. Expansion screw produced significantly higher (p<0.001) artefact compared to other types of metallic fixed auxiliary appliance. Conclusion: A difference in artefact scores were observed depending on the types of the fixed auxiliary appliance. Artefact produced by expansion screw was superior compared to the other types of metallic fixed orthodontic auxiliary appliances.

Item ID:	93896
Item Type:	Conference Item (Presentation)
Related URLs:	https://www.iadrmalsec.com/
Date Deposited:	03 Sep 2026 05:58
FoR Codes:	32 BIOMEDICAL AND CLINICAL SCIENCES > 3203 Dentistry > 320308 Orthodontics and dentofacial orthopaedics @ 100%
SEO Codes:	20 HEALTH > 2099 Other health > 209999 Other health not elsewhere classified @ 100%
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