Muscle which has influence in the formation of buccal frenum of maxilla
**Core Concept**
The buccal frenum of the maxilla is a fibrous structure that connects the maxilla bone to the buccinator muscle. The formation of this structure is influenced by the muscle that lies beneath it, which plays a crucial role in the oral cavity's functions such as mastication, swallowing, and speech.
**Why the Correct Answer is Right**
The buccinator muscle is a quadrilateral muscle that lies in the cheek and plays a significant role in the formation of the buccal frenum of the maxilla. This muscle is innervated by the buccal branch of the facial nerve and helps to compress the cheek against the teeth, aiding in the formation of the buccal frenum. The buccinator muscle's attachment to the maxilla bone and the surrounding tissues contributes to the formation of the buccal frenum.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as the masseter muscle, although involved in mastication, does not directly influence the formation of the buccal frenum of the maxilla.
* **Option B:** This option is incorrect as the orbicularis oris muscle, which surrounds the mouth, does not have a direct influence on the formation of the buccal frenum of the maxilla.
* **Option D:** This option is incorrect as the platysma muscle, which lies in the neck, does not have a direct influence on the formation of the buccal frenum of the maxilla.
**Clinical Pearl / High-Yield Fact**
The buccinator muscle's involvement in the formation of the buccal frenum of the maxilla is essential for understanding the anatomy of the oral cavity and the functions of the muscles involved in mastication and speech.
**Correct Answer: C. Buccinator muscle**