Reliability of quantitative analysis of the glenoid fossa with magnetic resonance imaging

DOI
  • KOHI Kaori
    Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine Department of Pediatric Dentistry/Dentistry for Persons with Special Needs, Division of Oral Restitution, Graduate School, Tokyo Medical and Dental University
  • ITO Hirokazu
    Department of Oral and Maxillofacial Radiology and Diagnosis, Tsurumi University School of Dental Medicine
  • IGARASHI Chinami
    Department of Oral and Maxillofacial Radiology and Diagnosis, Tsurumi University School of Dental Medicine
  • KOBAYASHI Kaoru
    Department of Oral and Maxillofacial Radiology and Diagnosis, Tsurumi University School of Dental Medicine
  • OHKUBO Chikahiro
    Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine

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Other Title
  • MR画像を用いた下顎窩面積の定量的評価方法の信頼性

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<p>Anatomically, the mandibular fossa is paired with the mandibular condyle, and a quantitative and objective evaluation of its changes is important. In this paper, we report a study using MR images to clarify the reliability of a method of objectively evaluating the mandibular fossa area. The subjects were 15 patients with temporomandibular disorders who had MR images taken at the first visit, for a total of 30 joints (2 males, 13 females, average age 29.2 years, median 19.0 years).</p><p>Using Aze Win (AZE, Tokyo), the area of the mandibular fossa of 30 joints was measured by two examiners. Each measurement was carried out two times at an interval of more than one month. The first and second values were statistically analyzed using Spearman's rank correlation coefficient at a significance level of 1%, and intraclass correlation (ICC) at a significance level of 5%.</p><p>Spearman's rank correlation coefficients were 0.9426 (p<0.001) and 0.9146 (p<0.001), showing a very high correlation between the first and second area values. The intra-observer reliability was 0.9873 and 0.9647, and the ICC was 0.9318 (first measurement) and 0.9749 (second measurement). Thus, it was shown that this measurement method has highly reliability, both intra-observer and inter-observer.</p>

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