Anatomic and functional changes after myotomy with or without mandibular anguloplasty in masseter hypertrophy patients: A prospective study

Publication date: Available online 26 December 2018

Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology

Author(s): Sujata Mohanty, Priyadarshan Kumar, Ujjwal Gulati, Jitender Dabas, Sanchaita Kohli, Zainab Choudhary

Abstract

Objective

The current study aims to evaluate the anatomic and functional outcome in patients with masseter hypertrophy following surgical debulking of the masseter.

Methods

18 patients (28 sites) of masseter hypertrophy underwent surgical muscle debulking with / without osseous recontouring. Post-operative assessment was done by measuring change in: a) muscle thickness using ultrasonography, b) electrical activity of the muscle using electromyography (EMG) and c) maximum bite forces generated 1 year following surgery. Visual Analogue Scale (VAS; 1–10) was used to evaluate the patients' aesthetic satisfaction.

Results

An average reduction in muscle thickness at rest and clench by 6.35 and 5.25 mm, respectively was seen 12 months after surgery. Mean bite force and clench EMG showed a statistically significant decrease 1 year post-operatively (p = 0.001 and p = 0.0001 respectively). The average mouth opening increased significantly by 8 mm (p < 0.05) and a mean aesthetic satisfaction VAS score of 8.1 was reported by patients after 1 year.

Conclusion

Surgical debulking is a reliable treatment modality for masseter hypertrophy providing good aesthetic and functional outcomes.

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