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Masticatory muscle tendon-aponeurosis hyperplasia: A new clinical entity of limited mouth opening

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ABSTRACT

Limited mouth opening is a common health problem that interferes with eating, makes examination of the oral cavity difficult, and may increase the mortality rate during emergency intubation. Here we introduce a disease designated as masticatory muscle tendon-aponeurosis hyperplasia, which is a new clinical condition of limited mouth opening. Most oral surgeons and dentists are still unaware of this disease condition, thus increasing the risk of incorrect diagnosis as some other disease, such as temporomandibular joint disorder. We will review the clinical features, epidemiology, pathophysiology, etiology, diagnosis, treatment, and prognosis of this disease and also appraise the literature available on the subject.

No MeSH data available.


Horizontal section in MRI. Overhang of masseter muscle along the anterior border of mandibular ramus (yellow arrow). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
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fig0010: Horizontal section in MRI. Overhang of masseter muscle along the anterior border of mandibular ramus (yellow arrow). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)

Mentions: In addition, a bilateral overhang of the masseter muscle along the anterior border of the mandibular ramus is noted. Minowa et al. reported that aponeuroses of the masseter muscles are rarely found below the lower half of the anterior margin of the masseter muscles [11]. However, thickened aponeuroses are often observed to extend onto this lower half in patients with MMTAH. Kobayashi et al. reported that it is useful to visualize tendons and aponeuroses using magnetic resonance imaging (MRI) [12]. On maximal mouth opening, intraoral palpation along the anterior border of the masseter muscle reveals a hard cord-like structure, consistent with the findings on the MRI (Fig. 2).


Masticatory muscle tendon-aponeurosis hyperplasia: A new clinical entity of limited mouth opening
Horizontal section in MRI. Overhang of masseter muscle along the anterior border of mandibular ramus (yellow arrow). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5382786&req=5

fig0010: Horizontal section in MRI. Overhang of masseter muscle along the anterior border of mandibular ramus (yellow arrow). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Mentions: In addition, a bilateral overhang of the masseter muscle along the anterior border of the mandibular ramus is noted. Minowa et al. reported that aponeuroses of the masseter muscles are rarely found below the lower half of the anterior margin of the masseter muscles [11]. However, thickened aponeuroses are often observed to extend onto this lower half in patients with MMTAH. Kobayashi et al. reported that it is useful to visualize tendons and aponeuroses using magnetic resonance imaging (MRI) [12]. On maximal mouth opening, intraoral palpation along the anterior border of the masseter muscle reveals a hard cord-like structure, consistent with the findings on the MRI (Fig. 2).

View Article: PubMed Central - PubMed

ABSTRACT

Limited mouth opening is a common health problem that interferes with eating, makes examination of the oral cavity difficult, and may increase the mortality rate during emergency intubation. Here we introduce a disease designated as masticatory muscle tendon-aponeurosis hyperplasia, which is a new clinical condition of limited mouth opening. Most oral surgeons and dentists are still unaware of this disease condition, thus increasing the risk of incorrect diagnosis as some other disease, such as temporomandibular joint disorder. We will review the clinical features, epidemiology, pathophysiology, etiology, diagnosis, treatment, and prognosis of this disease and also appraise the literature available on the subject.

No MeSH data available.