Where your lower jaw connects to your skull?

• A. TMJ (Temporomandibular Joint)
• B. Root Canal
• C. Sterilization
• D. Proximal

Answer: (A)

This question tests your knowledge of where the lower jaw meets the skull. The lower jaw, or mandible, attaches to the skull at the temporomandibular joint, located just in front of each ear. The rounded end of the mandible (the condyle) sits into the temporal bone’s articular fossa, with a cushioning disc in between, forming a synovial joint that moves as you speak, chew, and open or close your mouth. This joint is a modified hinge that also allows gliding movements, giving you the full range of jaw motion. Other terms in the choices don’t describe a joint between the jaw and skull: a root canal is a dental procedure inside a tooth, sterilization refers to cleaning instruments, and proximal describes surfaces toward the midline between teeth.