A pilot study on characterization of articulatory movements during fricative /s/ sound in an anterior open-bite subject: A tooth-visualized 3-T magnetic resonance imaging video evaluation
A pilot study on characterization of articulatory movements during fricative /s/ sound in an anterior open-bite subject: A tooth-visualized 3-T magnetic resonance imaging video evaluation
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DOI：
10.1016/j.ejwf.2015.03.001
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发表时间：
2015-06-01
影响因子：
2.1
通讯作者：
Ono, Takashi
中科院分区：
文献类型：
--
作者：
Nunthayanon, Kulthida;Honda, Ei-ichi;Ono, Takashi
背景资料：本研究的目的是应用牙齿可视化的3-T视频磁共振成像（MRI）的方法来评估关节运动在正常咬合和前牙开constitutes.Methods：6名健康女性与正常咬合和一名妇女与2毫米牙齿前牙开被招募。受试者使用3-T MRI扫描仪进行扫描，同时产生元音-辅音-元音音节（/阿萨/）。使用了梯度回波序列（快速低角度拍摄）和分段电影和并行成像技术（广义自动校准部分并行采集）。然后，受试者佩戴含有造影剂凝胶的定制透明板，并再次使用涡轮自旋回波序列进行扫描。使用面部标志作为参考来标记MRI图像。所有科目的发音运动进行了分析，使用叠加images.Results：开牙合主题的舌头移动更多的前比正常咬合科目时，产生相同的consonants.Conclusion：牙齿可视化的3-T MRI视频是一种有效的方法，客观诊断的变化，在前开牙合主题的发音运动。(C)2015年世界正畸医师联合会。
Background: The aim of this study is to apply a tooth-visualized 3-T video magnetic resonance imaging (MRI) method for evaluating articulatory movement in normal-bite and anterior open-bite subjects.Methods: Six healthy women with normal occlusion and a woman with 2-mm dental anterior open bite were recruited. The subjects were scanned with use of a 3-T MRI scanner while producing a vowel-consonant- vowel syllable (/asa/). A gradient echo sequence (fast low angle shot) with a segmented cine and a parallel imaging technique (generalized auto-calibrating partially parallel acquisitions) was used. Then, subjects wore customized clear plates containing contrast agent gel and were scanned again with a turbo spin-echo sequence. Facial landmarks were used as references to superimpose the MRI images. The articulatory movements of all subjects were analyzed using the superimposed images.Results: The tongue of the open-bite subject moved more anteriorly than that of the normal-bite subjects when producing the same consonant sound.Conclusion: A tooth-visualized 3-T MRI video is an effective method for objective diagnosis of variation in articulatory movement of the anterior open-bite subject. (C) 2015 World Federation of Orthodontists.