West China Journal of Stomatology ›› 2019, Vol. 37 ›› Issue (1): 66-69.doi: 10.7518/hxkq.2019.01.013

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Comparison of the two magnetic resonance deartifact techniques in imaging of different porcelain-fused-to-metal crowns

Wenjin Li1,Jinliang Niu2(),Li Zhu1,Yu Wang1,Ying An1,Shuangyuan Zhang1   

  1. 1. Dept. of Stomatology, The Second Hospital of Shanxi Medical University, Taiyuan 030001, China
    2. Dept. of Radiology, The Second Hospital of Shanxi Medical Uni-versity, Taiyuan 030001, China
  • Received:2018-02-11 Revised:2018-06-05 Online:2019-02-01 Published:2019-02-01
  • Contact: Jinliang Niu E-mail:sxlscjy@163.com
  • Supported by:
    Scientific and Technological Innovation Project of Higher Education Institutions of Shanxi Provincial Education Department(20141105);Teaching Fund of The Second Hospital of Shanxi Medical University(201603-5);Shanxi Overseas Students’ Scientific Research Subsidy Project for Overseas Students in Shanxi Province(2016-122);Selective Fund for Scientific and Technological Activities of Returnees from Overseas Studies in Shanxi Province(晋财社<2017>19号)

Abstract:

Objective This study aimed to compare the porcelain-fused-to-metal (PFM) crown artifact in the magnetic resonance imaging (MRI) of the two magnetic resonance deartifact techniques in studying the application value of the propeller-fast spin-echo T2-weighted sequence (FSE T2WI) in troubleshooting PFM crown artifacts. Methods A total of 48 patients with right mandible first molar crown who underwent MRI head examination were chosen as subjects in the study. According to different metal substrates, PFM crowns were divided to three types, namely, nickel-chromium alloy crown, cobalt-chromium alloy crown and titanium crown. The patients received two MRI scan sequences, that is, FSE T2WI and propeller-FSE T2WI sequences. The MRI artifacts areas in two sequences were measured. Results The difference between FSE T2WI and propeller-FSE T2WI sequences in three kinds of PFM crown was significant (P<0.05). Conclusion Propeller-FSE T2WI sequence technique can effectively reduce the metal artifacts of various PFM crowns.

Key words: magnetic resonance imaging, porcelain-fused-to-metal, propeller, metal artifact

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