顎関節症患者のMR画像における円板後部組織の低信号の評価 : 鏡視下剥離授動術前後の比較検討 Evaluation of low signal intensity in the posterior disc attachment of temporomandibular joints revealed by MRI before and after arthroscopic lysis and lavage in patients with temporomandibular disorders

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著者

    • 大貫 敬嘉 OHNUKI Takayoshi
    • 秋田大学医学部附属病院歯科口腔外科 Division of Dentistry and Oral Surgery, Akita University School of Medicine
    • 福田 雅幸 FUKUDA Masayuki
    • 秋田大学医学部附属病院歯科口腔外科 Division of Dentistry and Oral Surgery, Akita University School of Medicine
    • 関 宏 SEKI Hiroshi
    • 秋田大学医学部附属病院歯科口腔外科 Division of Dentistry and Oral Surgery, Akita University School of Medicine
    • 飯野 光喜 IINO Mitsuyoshi
    • 秋田大学医学部附属病院歯科口腔外科 Division of Dentistry and Oral Surgery, Akita University School of Medicine
    • 高橋 哲 TAKAHASHI Tetsu
    • 九州歯科大学口腔外科学第二講座 Second Department of Oral and Maxillofacial Surgery, Kyushu Dental College

抄録

本研究は, 保存療法無効症例に対し鏡視下剥離授動術を施行し, その治療前後の円板後部組織の信号の変化をT1強調画像 (1.5Tesla) で評価した。<BR>対象は, 保存療法が無効のため鏡視下剥離授動術を行った43例43関節である。これらの患者を奏効群 (32症例32関節) と非奏効群 (11症例11関節) に分け, 治療前後での円板後部組織の低信号化を比較検討した。<BR>奏効群は, 治療後, 有意に円板後部組織の低信号化を示していた。一方, 非奏効群は, 治療後, 円板後部組織の低信号化を示さなかった。治療後の円板後部組織の低信号の出現頻度は, 奏効群 (81.3%) が非奏効群 (45.5%) より有意に高い値を示していた。<BR>以上より, 鏡視下剥離授動術後の奏効と円板後部組織の低信号化とは相関がみられた。

The purpose of this study was to evaluate the signal intensity of the posterior disc attachment on T1-weighted magnetic resonance imaging (1.5 Tesla) before and after arthroscopic lysis and lavage in patients with temporomandibular disorders.<BR>Forty three joints (43 patients) that were unresponsive to nonsurgical therapy, and that had undergone arthroscopic lysis and lavage, were included in this study. The patients were classified into 2 groups, as follows: a successful group (32 joints of 32 patients) and an unsuccessful group (11 joints of 11 patients). We compared the signal intensities of the posterior disc attachment before and after arthroscopic lysis and lavage.<BR>In the successful group, there was a significant association between before and after arthroscopic lysis and lavage, in the change of the signal intensity in the posterior disc attachment, whereas no statistical difference was found in the unsuccessful group. The incidence of low signal intensity in the posterior disc attachment was higher in the successful group (81.3%) than in the unsuccessful group (45.5%).<BR>These results suggested that the improvement of joint pain and dysfunction after arthroscopic lysis and lavage was correlative to low signal intensity in the posterior disc attachment.

収録刊行物

  • TMJ : journal of Japanese Society for Temporomandibular Joint : 日本顎関節学会雑誌

    TMJ : journal of Japanese Society for Temporomandibular Joint : 日本顎関節学会雑誌 13(3), 334-339, 2001-12-20

    The Japanese Society for Temporomandibular Joint

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