mandible TMJ joint ligaments Hyoid bone.pptx

Mandible TMJ joint anatomy hyoid bone

1. Mandible TMJ joint Hyoid bone Malaika awan

2. Mandible The mandible, or lower jawbone, is the largest and strongest bone of the face. It consists of a horizontal body and two vertical sections called the rami. At the point where the body and ramus meet, there is an angle known as the mandibular angle. The superior aspect of each ramus has two key projections separated by the mandibular notch: the coronoid process anteriorly and the condylar process posteriorly.

3. Mandible The condylar process is the part of the mandible that articulates with the temporal bone of the skull to form the temporomandibular joint (TMJ).
The rounded head of the condylar process is called the mandibular condyle. This condyle fits into the mandibular fossa (or glenoid fossa) of the temporal bone, forming the joint.
A small, fibrous articular disc is located between these two bones, separating the joint into two distinct cavities. This

4. Articular Disc The articular disc is a thin, oval plate made of fibrocartilage that is positioned between the mandibular condyle and the temporal bone. Anteriorly it is attached to the tendon of lateral pterygoid muscle. It's shaped like a biconcave lens, with a thicker periphery and a thinner enter. This disc effectively divides the joint into two separate cavities: The inferior compartment (between the disc and the mandibular condyle) The superior compartment (between the disc and the temporal bone)

5. Joint Capsule: The fibrous joint capsule is a loose, thin envelope that encloses the entire TMJ. It attaches to the circumference of the mandibular fossa and the articular tubercle of the temporal bone above and to the neck of the mandibular condyle below.