MRI and Ultrasound Emerge as Reliable Non-Ionising Options for Dental Implant Planning: Study
A systematic review and meta-analysis published in International Journal of Implant Dentistry found that Magnetic Resonance Imaging (MRI) matches cone-beam CT (CBCT) in hard-tissue accuracy—showing minimal geometric deviations in implant positioning—while ultrasonography significantly outperforms CBCT in assessing soft-tissue dimensionsSpringerOpenSciety. Specifically, MRI's deviation in implant tip placement averaged 0.3 mm (95% CI −0.08 to 0.68 mm), and entry-level deviation was 0.38 mm (95% CI 0.04 to 0.71 mm); angulation deviation was just 0.81° (95% CI −0.50 to 2.12°), indicating close alignment with CBCT standards. By contrast, ultrasonography delivered soft-tissue accuracy with a remarkable mean deviation of only 0.04 mm (95% CI −0.04 to 0.13 mm)
These findings point to MRI and ultrasonography as promising, radiation-free alternatives for dental implant imaging. MRI stands out for its hard-tissue fidelity, while ultrasound excels in soft-tissue resolution—especially useful in scenarios where CBCT's visualization is limited by artifacts or when minimizing radiation exposure is essential. That said, the study emphasizes the pressing need for standardized imaging protocols to ensure consistent clinical workflows and reliable diagnostic outcomes.
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