Surgical Intervention for Masticatory Muscle Tendon-Aponeurosis Hyperplasia Based on the Diagnosis Using the Four-Dimensional Muscle Model

The Journal of Craniofacial Surgery
Kazutoshi NakaokaTakumi Ogawa

Abstract

The surgical target of Masticatory muscle tendon-aponeurosis hyperplasia (MMTAH) is the masseter or temporal muscle. In our clinic, the 4-dimentional muscle model (4DMM) has been used to decide if we should approach to the masseter or temporal muscle. The aim of this study is validate the clinical usefulness of 4DMM on the basis of the surgical results. The 4DMM was constructed from the digital data of 3D-CT and 4-dimentional mandibular movements of the patients. It made us to able to visually observe the expansion rate of masticatory muscles at maximum mouth opening comparing to their length at closed mouth position. Fifteen patients were applied the 4DMM before the surgical treatment and 2 healthy volunteers were enrolled as control group. The expansion rate of temporal muscle at the maximum mouth opening in the patient group was significantly less than that in the control group (P < 0.05). On the other hand, the masseter muscles of all patients were expanded as same as the control group. Therefore the main cause of limitation of mouth-opening was suggested to be a contracture of the temporal muscle. Consequently, we performed successful bilateral coronoidectomy with no surgical intervention to the masseter muscles in all pat...Continue Reading

References

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Oct 13, 1998·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·K MinowaM Nakamura
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Oct 20, 2009·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Shinya HiraiYosizo Matsuka

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Citations

Dec 20, 2020·International Journal of Surgery Case Reports·Nagwan ElsayedHiroki Nagayasu

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