[Table/Fig-4]:

In vitro studies.

Study, Author Name, Year	Objective	Type of View	Sample Size	Interpretation
Kajan ZD et al.,(2015) [23]	To compare the metal artifacts from common metal orthodontic brackets in magnetic resonance imaging.	Three different sequences of coronal and axial images were obtained: spin-echo T1-weighted images, fast spin-echo T2-weighted images, and fluid-attenuated inversion recovery images.	Dry mandible with 12 intact premolars	The findings from the MRI revealed that the 3M and Dentaurum brackets with NiTi wires induced smaller artifacts along all axes than those with SS wires.
Gorgulu S et al., (2014) [24]	To evaluate the heating and magnetic field interactions of fixed orthodontic appliances with different wires and ligaments in a 3-T MRI environment and to estimate the safety of these orthodontic materials.	T1 weighted axial sequencing	40 non-carious maxillary teeth	The temperature changes of the specimens were considered to be within acceptable ranges. With regard to magnetic field interactions, brackets were considered MR safe.
Akgun OM et al., (2014) [25]	To compare the effect of Magnetic Resonance Imaging (MRI) on microleakage of Class II bonded amalgam versus classical amalgam restorations.	1.5T superconductive unit	Class II cavities 40 permanent molar teeth	The findings of the study revealed that the occlusal and gingival surface microleakage did not increased after MRI exposure. Similar findings were observed for the teeth with bonded amalgam filling.
Tymofiyeva O et al., (2013) [26]	To investigate the potential influence of standard dental materials on dental MRI (dMRI) by estimating the magnetic susceptibility with the help of the MRI-based geometric distortion method	T2 weighted images	Dental materials such as composite, gold alloy, titanium alloy etc.	MRI detect relatively strong distortions materials and they classified as compatible I such as composite, amalgam, gold alloy, gold- ceramic crowns, titanium alloy and NiTi orthodontics wires and another were classified as non-compatible materials such as stainless steel orthodontic appliances and CoCr.
Yilmaz S et al., (2013) [27]	To evaluate the effects of 3 T magnetic field on microleakage of amalgam restorations containing three different types of silver (Ag).	T1 weighted, 3T	60 extracted teeth	An MRI of 1.5 T is known to be safe for amalgam restorations. However, our research indicates that MRI is not completely devoid of any effects on amalgam restorations.
Hasegawa M et al., (2013) [28]	To estimate the risk of injury from Radio Frequency (RF) heating of metallic dental devices in use during 3.0 T MRI.	3.0 T MRI	Three unit bridges, a full-arch fixed dental prosthesis and an orthodontic appliance	Relatively minor RF heating of dental casting material-based prostheses and orthodontic appliances may exhibit RF heating above the industrial standard.
Klinke T et al., (2012) [29]	In-vitro study was to identify and evaluate the artifacts produced by different dental restoration materials in CT and MRI images	T1-weighted spin-echo sequence and T2-weighted turbo spin-echo sequence	44 different materials (metal and non-metal)	In MRI, 13 out of 44 materials produced artifacts, while in CT 41 out of 44 materials showed artifacts. Artifacts produced in both MRI and CT images were categorized according to the size of the artifact.
Idiyatullin D. et al., (2011) [30]	To assess the feasibility of a recently developed MRI technique, called Sweep Imaging with Fourier Transform (SWIFT), to visualize dental tissues.	9.4T system and 4T system	6 teeth	It has the potential to image minute dental structures within clinically relevant scanning times. This technology has implications for endodontists since it offers a potential method to longitudinally evaluate teeth where pulp and root structures have been regenerated.
Tanasiewicz M et al., (2010) [5]	Possibility to use 3D spin echo magnetic resonance imaging techniques in the dentistry within the scope of a dimensional imaging of the inner spaces of teeth during an prosthetic procedure.	4.7T	6 extracted molar teeth	MRI made it possible to compare the quality of internal tooth space after preparation for inner root canal fixations constructed using both classical methods (polymer mass impression) and non-impressional methods (MRI representation).