Artefacts at different distances from titanium and zirconia implants in cone-beam computed tomography: effect of tube current and metal artefact reduction

Author(s)

Maseti Mancini, Arthur Xavier ^[1] ; Cruz Santos, Matheus Urias ^[2] ; Gaeta-Araujo, Hugo ^[3] ; Tirapelli, Camila ^[1] ; Pauwels, Ruben ^{[4, 5]} ; Oliveira-Santos, Christiano ^[2]

Affiliation

^[1] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Dent Mat & Prosthodont, Av Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Stomatol Publ Oral Hlth & Forens Dent, Div Oral Radiol, Av Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

^[3] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Oral Diag, Div Oral Radiol, Av Limeira 901, BR-13414903 Piracicaba, SP - Brazil

^[4] Katholieke Univ Leuven, Dept Imaging & Pathol, Med Phys & Qual Assessment, Leuven - Belgium

^[5] Aarhus Univ, Aarhus Inst Adv Studies, Hoegh Guldbergs Gade 6B, DK-8000 Aarhus - Denmark

• Document type: Journal article
• Source: CLINICAL ORAL INVESTIGATIONS; v. 25, n. 8, p. 5087-5094, AUG 2021.
• Web of Science Citations: 0

Abstract

Objectives To evaluate the effect of cone-beam computed tomography (CBCT) tube current (mA) on the magnitude of artefacts at different distances from titanium or zirconia implants, with and without activation of a proprietary metal artefact reduction (MAR). Material and methods Human mandibles were scanned on an OP300 Maxio CBCT unit (Instrumentarium, Tuusula, Finland) before and after the installation of dental implants, with four different tube currents (4 mA, 6.3 mA, 8 mA and 10 mA), with and without activation of proprietary MAR. The effect of mA on the standard deviation (SD) of gray values and contrast to noise ratio (CNR) were assessed in regions of interest located 1.5 cm, 2.5 cm, and 3.5 cm from implants. Results In the presence of titanium implants, a significant decrease in SD was found by increasing tube current from 4 mA to 6.3 mA or 8 mA. For zirconia implants, 8 mA yielded better results for all distances. MAR improved CNR in the presence of zirconia implants at all distances, whereas no differences were observed with the use of MAR for titanium implants. Conclusion Increased tube current can improve overall image quality in the presence of implants, at all the distances tested. When a zirconia implant is present, such increase in mA should be higher in comparison to that for examinations with titanium implants. Activation of OP300 Maxio proprietary MAR improved image quality only among examinations with zirconia implants. (AU)

• FAPESP's process: 18/22952-7 - Optimization of CBCT tube current parameters for the assessment of regions at different distances from dental implants and peri-implant bony defects
• Grantee: Christiano de Oliveira Santos
• Support Opportunities: Regular Research Grants