Authors
Sayaka Kodama, Shin Nakamura, Akiko Imaizumi, Ami Kuribayashi, Hiroshi Watanabe, Yoshikazu Nomura, Miharu Taguchi, Arisa Oki, Sakiko Kume, Masahiko Miura
Published in
Journal of oral science. Sep 18, 2026. Epub Sep 18, 2026.
Abstract
To characterize the computed tomography (CT) features of masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) and evaluate their diagnostic discriminative ability.
This retrospective study evaluated 17 patients with MMTAH and 41 controls who underwent CT for non-MMTAH indications. The anteroposterior and transverse diameters of the coronoid process at its central portion, the long, and short axes of the mandibular condyle at its largest cross-section, and the area of the peritemporal adipose layer at the level of the coronoid tip were measured on axial CT using attenuation-based semi-automated segmentation. Two board-certified oral and maxillofacial radiologists performed duplicate measurements twice with a 2 week minimum interval. Group comparisons used the Mann-Whitney U test (two-tailed, P < 0.05).
Most variables had high reliability (ICC > 0.90). The coronoid diameters and condylar axes were significantly larger, whereas the peritemporal adipose areas were significantly smaller in MMTAH patients than in controls (all P < 0.01). Box and whisker plots demonstrated complete interquartile range separation for coronoid transverse diameters between groups, indicating the strongest discriminative performance among the tested metrics.
MMTAH is characterized by coronoid enlargement, adjunctive condylar enlargement, and a reduction in the peritemporal adipose layer on axial CT. CT-based morphometry may aid the diagnostic assessment of MMTAH.
PMID:
42778411
Bibliographic data and abstract were imported from PubMed on 24 Sep 2026.
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