What are the two main components of the TMJ?

The two main components of the temporomandibular joint (TMJ) are the mandibular condyle and the temporal bone. The mandibular condyle is the rounded end of the mandible (lower jawbone) that articulates with the temporal bone of the skull. This articulation forms the TMJ, which allows for the hinge-like movement of the jaw necessary for functions such as chewing and speaking.

The temporal bone houses the socket, or fossa, that accommodates the mandibular condyle, providing stability and enabling the smooth movement of the joint. This anatomical relationship is essential for the proper function of the jaw, as the movements of the mandibular condyle within the temporal bone promote activities such as opening, closing, and lateral movement of the jaw.

In contrast, the other combinations of bones mentioned do not form the TMJ and hence do not play a direct role in its articulation or function.