The masseter muscle is one of the masticatory muscles. It begins at the lower edge and inner surface of zygomatic arch and ends at the lateral side of masseter tubercle and mandibular branch. The contraction of masseter muscle, temporal muscle and medial pterygoid muscle can hold up the mandible (closed mouth). Dominated by the mandibular nerve masseter nerve.
Solution: The masseter operation is carried out through the oral cavity, mainly paying attention to thoroughly disinfecting the oral cavity, reducing bacteria in the oral cavity and reducing postoperative infection rate. When removing the masseter muscle, the medial side of the masseter muscle should be removed to avoid damaging the mandibular marginal branch of the facial nerve.
The amount of masseter muscle resection depends on preoperative examination. Because most of the masseter muscle resection needs to remove the mandibular angle at the same time, the masseter muscle itself will shrink to a certain extent 3-6 months after operation, so the masseter muscle resection amount generally does not exceed one-third of the masseter muscle thickness.
Extended data:
The masseter muscle is influenced by many factors, such as race, sex, age and face shape. Generally speaking, men are more developed than women, and the elderly are more developed than young people, but the decisive factor is chewing. Because of its contraction, people who often love hard food will develop masseter muscles accordingly. For example, people who often eat beef jerky and chew gum have more developed masseter muscles than ordinary people.
If you eat hard food from an early age and chew more during adolescence, the mandible will often over-develop under its influence, forming the appearance of hypertrophy of mandibular angles such as square face and Chinese character face. At the same time, due to their mutual influence, patients with mandibular angle hypertrophy are often accompanied by masseter muscle hypertrophy.
References:
Baidu encyclopedia-masseter muscle