Quantitative study of image artifacts from dental implants in magnetic resonance imaging

การศึกษาปริมาณภาพแปลกปลอมจากรากฟันเทียมในภาพเรโซแนนซ์แม่เหล็ก

Name: Paphada Sungkaruk

LCSH: Teeth -- Roots

LCSH: Endodontics

LCSH: Magnets

LCSH: Resonance

Abstract: Magnetic resonance imaging (MRI) is a radiation-free imaging modality widely used for diagnosis. However, dental implants often induce artifacts due to magnetic field inhomogeneity resulting from the mismatch between metal and biological tissues in MRI. These artifacts impede visualization in oral and maxillofacial MRI scans. Our study aimed to assess artifact volumes generated by commonly used implant dentistry materials across various MRI sequences. Different dental implants—titanium (Ti), zirconium (Zr), titanium-zirconium (TiZr), and polyetheretherketone (PEEK)—were placed individually in edentulous maxillary and mandibular central incisal regions of a dried skull. These areas were then sealed in containers filled with water and gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA), and scanned using a 1.5T MR scanner employing T1-weighted imaging (T1W), T2W, proton density weighted imaging (PDW), diffusion-weighted imaging (DWI), and ultrashort echo time (UTE) sequences. Artifact volumes were measured using ImageJ software. Two-way ANOVA and Tukey statistical analyses were conducted to compare artifact volumes. In the maxillary region, Ti produced significantly larger artifact in PDW and DWI sequences (range: 1756.67±464.76 to 2217.75±1109.07 mm3). In the mandibular region, TiZr showed the significantly major artifacts in T2W, PDW, and turbo spin-echo (TSE)-DWI sequences (range: 2050.20 ± 704.55 to 3433.33 ± 3313.46 mm3), with PEEK displaying the least artifact volumes in both maxillary and mandibular sites (p< 0.05). Notably, all materials demonstrated insignificant artifacts in the UTE sequence. Ti-based dental implants generated substantial artifacts, while UTE sequences exhibited fewer artifacts compared to other MRI sequences in anterior maxillary and mandibular regions.

Chiang Mai University. Library

Address: CHIANG MAI

Email: cmulibref@cmu.ac.th

Name: Pisaisit Chaijareenont

Role: Advisor

Name: Pimduen Rungsiyakull

Role: Advisor

Name: Wannakamon Panyarak

Role: Advisor

Name: Uten Yarach

Role: Advisor

Created: 2025

Modified: 2025-06-23

Issued: 2025-06-23

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Dentistry

Grantor: Chiang Mai University

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