Table 2 Masticatory muscles and corresponding dose of botulinum toxin
Muscle | Origin | Insertion | Dose | Number of injection |
|---|---|---|---|---|
Temporalis | Temporal fossa | Medial and anterior aspect of coronoid process of mandible | 5~25 BU | 5 |
Masseter | Anterior two thirds of zygomatic arch and zygomatic process of maxilla | Lateral surface of angle and lower ramus of mandible | 25~50 BUa | 5 |
Medial pterygoid | Deep head: medial side of lateral pterygoid plate and fossa between medial and lateral plates. Superficial head: tuberosity of maxilla and pyramidal process of palatine bone | Medial aspect of angle of mandible | 5~25 BU | 2~3 |
Lateral pterygoid | Upper head: infratemporal surface of sphenoid bone. Lower head: lateral surface of lateral pterygoid plate | Pterygoid fovea below condyloid process of mandible and TMJ meniscus | 5~10 BU | 1 |