The effects of commonly used dental cast metal posts and cores on MRI
10.3969/j.issn.1001-3733.2014.04.03
- VernacularTitle:口腔常用铸造金属桩核对磁共振成像的影响
- Author:
Qingyun MA
;
Xin LI
;
Ye SONG
;
Lu WANG
- Publication Type:Journal Article
- Keywords:
Magnetic resonance imaging(MRI);
Metal post and core;
Artifacts
- From:
Journal of Practical Stomatology
2014;(4):460-463
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the influence of commonly used dental cast metal posts and cores on magnetic resonance imaging (MRI)for head and neck.Methods:Six kinds of posts and cores made of metal alloy (Ni-Cr alloy,Co-Cr alloy,titanium alloy,pure titanium,Pd-Au alloy and Au-Pt alloy)were respectively fixed on the mucosa of left palate of a volunteer.The maxillofacial region of the subjects was scanned by routine head sequences SE-T1WI and TSE-T2WI respectively.Results:ANOVA of factorial design analy-sis indicated significant differences of artifacts among metal materials(F=153.63,P<0.05),scanning sequences(F=70.94,P<0.05)and the number of cast posts and cores(F=102.73,P<0.05).In both sequences the size of metal artifacts were as following:Pd -Au alloy>Co-Cr alloy>Ni-Cr alloy>Au-Pt alloy>titanium alloy>pure titanium;two posts and cores>one post and core;SE-T1WI>TSE-T2WI.Conclusion:Different cast metal posts and cores have different influences on MRI artifact.Reasonably choosing the metal materials and scanning sequences can minimize artifacts on MRI.
