The outer layer of compact alveolar bone is called?

The outer layer of compact alveolar bone is called?

• A. Lamina dura
• B. Cementum
• C. Periosteum
• D. Alveolar mucosa

Answer: (A)

The wall that lines the tooth socket is the dense, compact bone known as the lamina dura. This thin, radiopaque layer is the bone proper of the alveolus that surrounds the tooth root and is continuous with the surrounding cortical plates. It forms the boundary of the socket where the periodontal ligament sits between the tooth and bone. Cementum covers the root surface, not the socket lining; periosteum is a membrane on the bone’s outer surface; alveolar mucosa is the soft tissue overlying the bone. So the outer layer of compact alveolar bone around the socket is the lamina dura.

The wall that lines the tooth socket is the dense, compact bone known as the lamina dura. This thin, radiopaque layer is the bone proper of the alveolus that surrounds the tooth root and is continuous with the surrounding cortical plates. It forms the boundary of the socket where the periodontal ligament sits between the tooth and bone. Cementum covers the root surface, not the socket lining; periosteum is a membrane on the bone’s outer surface; alveolar mucosa is the soft tissue overlying the bone. So the outer layer of compact alveolar bone around the socket is the lamina dura.