The effects of four dental metal crowns on magnetic resonance imaging
10.3969/j.issn.1001-3733.2014.04.06
- VernacularTitle:4种金属冠对磁共振成像影响的对比研究
- Author:
Lan GAO
;
Yinghuai ZHANG
;
Yunmin LIAN
;
Tiepeng XIAO
- Publication Type:Journal Article
- Keywords:
Artifacts;
Metallic artifacts;
Dental casting alloy;
Magnetic resonance imaging(MRI)
- From:
Journal of Practical Stomatology
2014;(4):472-476
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the artifacts produced by dental metal crown made from different materials on magnetic resonance imaging (MRI).Methods:Mental crows made from Co-Gr,Ni-Gr,low-Ti alloy and Pure-Ti were respectively fabricated for upper right second premolar of a ripe crossbreed dog.The 4 different casting crowns were respectively put on experimental tooth and head MRI scan was carried out with 4 sequences of 1.5 T and 6 sequences of 3.0 T MRI respectively.The existence and extent of the arti-facts were assessed and compared.Results:On both 1.5 T and 3.0 T MRI,the Go-Gr alloy crown exhibited significantly wider arti-facts than the others (ANAVO analysis,P<0.01).There were no significant differences among Ni-Gr,low-Ti alloy and Pure-Ti on 1.5 T MRI(P>0.05).On 3.0 T MRI the artifacts produced by Ni-Gr was larger than that by low-Ti alloy or Pure-Ti(P<0.05,be-tween low-Ti alloy and pure-Ti,P>0.05).By any of the test sequence either on 1.5 T or on 3.0 T,the Co-Gr alloy produced arti-facts in the most slices of MRI imaging and Pure-Ti in the least.Conclusion:Go-Gr alloy may produce larger artifacts than Ni-Gr, low-Ti alloy and Pure-Ti on MRI.
