Which option best describes the motion of the mandible's condyle during jaw movement?

Which option best describes the motion of the mandible's condyle during jaw movement?

• A. Rotation only
• B. Translation only
• C. Rotation, translation, and sliding
• D. Gliding

Answer: (C)

When the jaw opens, the condyle doesn’t move in a single, simple way. It starts with hinge-like rotation around a horizontal axis, which lets the mouth begin to open. As opening continues, the condyle and the disc translate forward and downward along the articular eminence. This forward movement is a form of gliding or sliding between the joint surfaces. So the overall motion of the condyle during jaw movement includes rotation, translation, and sliding, all working together to allow smooth opening and positioning of the mandible. The other descriptions capture only part of the motion—pure rotation misses the forward glide, pure translation misses the initial hinge action, and gliding alone doesn’t convey the initial rotational phase—so the combination best fits reality.

When the jaw opens, the condyle doesn’t move in a single, simple way. It starts with hinge-like rotation around a horizontal axis, which lets the mouth begin to open. As opening continues, the condyle and the disc translate forward and downward along the articular eminence. This forward movement is a form of gliding or sliding between the joint surfaces. So the overall motion of the condyle during jaw movement includes rotation, translation, and sliding, all working together to allow smooth opening and positioning of the mandible. The other descriptions capture only part of the motion—pure rotation misses the forward glide, pure translation misses the initial hinge action, and gliding alone doesn’t convey the initial rotational phase—so the combination best fits reality.