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Masticatory muscle tendon‐aponeurosis hyperplasia exhibits heterotopic calcification in tendons
Author(s) -
Sato T,
Hori N,
Nakamoto N,
Akita M,
Yoda T
Publication year - 2014
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/odi.12140
Subject(s) - aponeurosis , tendon , anatomy , masticatory force , calcification , medicine , hyperplasia , pathology , dentistry
Objective Masticatory muscle tendon‐aponeurosis hyperplasia is a new disease entity associated with limited mouth opening. In this study, we analyzed the microstructural characteristics of muscles and tendons in masticatory muscle tendon‐aponeurosis hyperplasia by electron microscopy and energy‐dispersive X ‐ray analysis to determine the elemental composition. Methods Histological analysis was performed to detect the calcification. Transmission electron microscopy and scanning electron microscopy were conducted to clarify the microstructural characteristics of muscles and tendons. Energy‐dispersive X ‐ray microanalysis was performed to identify the distribution of elements. Results Mineralized nodules were observed in tendon tissues of masticatory muscle tendon‐aponeurosis hyperplasia as compared with facial deformity. Electron microscopy revealed that the muscle and tendon tissues in masticatory muscle tendon‐aponeurosis hyperplasia showed degenerative changes and distinctive histological findings as compared with tissues in facial deformity. We found that C a, P , and S i were detected only in masticatory muscle tendon‐aponeurosis hyperplasia. Conclusion We demonstrated that masticatory muscle tendon‐aponeurosis hyperplasia exhibits heterotopic calcification in tendon tissues.