Which stage occurs immediately before maturation in TMJ development?

• A. Cavitation
• B. Blastemic
• C. Ossification
• D. Maturation

Answer: (A)

The key idea here is how the TMJ forms its joint space and then matures. In early development, mesenchyme condenses to form the blastemic stage, which lays out the future joint region. Cavitation then creates the joint cavity between the developing condyle and temporal bone, giving the joint a functional synovial space. After that, ossification begins to form the bony structures, and maturation follows as the joint undergoes final remodeling to reach its mature form. In the sequence used here, cavitation is described as occurring immediately before maturation because establishing the joint cavity is the crucial transition that allows the joint to proceed to full maturation and function.