Free CPT Periodontal Anatomy & Physiology Questions and Answers — Questions and Answers

Question 1: What is the primary function of the periodontal ligament?

To protect the tooth from bacteria.
To absorb chewing forces and anchor the tooth to the bone (Correct answer)
To produce enamel.
To prevent tooth decay.

Correct answer: To absorb chewing forces and anchor the tooth to the bone

The periodontal ligament (PDL) is a specialized connective tissue that surrounds the root of the tooth and connects it to the alveolar bone. Its primary functions are to provide a suspensory cushion, absorbing the forces of mastication (chewing) to protect the tooth and bone, and to firmly anchor the tooth within its socket. This dual role is essential for tooth stability and function.

Question 2: What is the role of the cementum in the periodontium?

To produce enamel.
To maintain the connection between the tooth and bone (Correct answer)
To protect the tooth from bacteria.
To absorb chewing forces.

Correct answer: To maintain the connection between the tooth and bone

Cementum is a specialized calcified tissue that covers the anatomical root of a tooth. Its main role is to provide an attachment surface for the periodontal ligament fibers, which in turn connect the tooth to the alveolar bone. This connection is vital for anchoring the tooth securely within its socket and distributing occlusal forces, thereby maintaining the tooth-bone connection.

Question 3: What is the primary function of the gingiva in oral health?

To produce enamel.
To support the teeth and protect underlying tissues (Correct answer)
To absorb chewing forces.
To anchor the tooth to the bone.

Correct answer: To support the teeth and protect underlying tissues

The gingiva, or gums, is the part of the oral mucosa that surrounds the teeth and covers the alveolar bone. Its primary function is to provide a protective barrier against bacterial invasion and physical trauma to the underlying periodontal tissues and bone. Healthy gingiva also helps support the teeth by maintaining their position in the arch.

Question 4: Which layer of the tooth provides nutrients to the dentin?

Enamel.
Pulp (Correct answer)
Cementum.
Periodontal ligament.

Correct answer: Pulp

The pulp is the innermost part of the tooth, containing blood vessels, nerves, and connective tissue. It is responsible for providing nutrients to the dentin, the layer beneath the enamel and cementum, through its extensive vascular network. This nourishment is crucial for the vitality and health of the dentin, making the pulp the correct answer.

Question 5: What is the role of alveolar bone in the periodontium?

To produce enamel.
To absorb chewing forces.
To support the teeth in their sockets (Correct answer)
To produce saliva.

Correct answer: To support the teeth in their sockets

Alveolar bone is the specialized bone that forms the sockets and supports the roots of the teeth. Its primary role is to provide structural support and stability, holding the teeth firmly in place within the jaw. Healthy alveolar bone is crucial for maintaining tooth integrity and function, directly supporting the teeth in their sockets.

Question 6: What is the primary role of the periodontal ligament?

To prevent tooth mobility.
To anchor the tooth to the bone (Correct answer)
To produce saliva.
To form enamel.

Correct answer: To anchor the tooth to the bone

The periodontal ligament (PDL) is a fibrous connective tissue that surrounds the root of the tooth and connects it to the alveolar bone. Its primary role is to anchor the tooth securely within its socket, allowing for slight movement while resisting dislodgement. This anchoring function is critical for the tooth's stability and ability to withstand chewing forces.

Question 7: What is the function of the sulcus in the periodontal anatomy?

To absorb chewing forces.
To allow the tooth to move.
To form enamel.
To maintain a protective barrier around the tooth (Correct answer)

Correct answer: To maintain a protective barrier around the tooth

The gingival sulcus is the shallow space or groove between the free gingiva and the tooth surface. While it can be a site for bacterial accumulation, its healthy state, with a shallow depth, helps to maintain a protective barrier around the tooth. This barrier, along with gingival crevicular fluid, helps to flush away debris and prevent pathogens from invading deeper periodontal tissues.

Question 8: What tissue is found between the tooth and the alveolar bone?

Enamel.
Cementum.
Periodontal ligament (Correct answer)
Gingiva.

Correct answer: Periodontal ligament

The periodontal ligament (PDL) is the specialized connective tissue located in the space between the root of the tooth and the alveolar bone. It acts as a suspensory apparatus, anchoring the tooth to the bone while also providing sensory, nutritive, and formative functions. Its presence is essential for the tooth's stability and response to occlusal forces.

Question 9: What is the function of gingival crevicular fluid?

To aid in the formation of enamel.
To lubricate the gums.
To cleanse periodontal tissues and prevent infection (Correct answer)
To form bone.

Correct answer: To cleanse periodontal tissues and prevent infection

Gingival crevicular fluid (GCF) is a serum transudate that flows into the gingival sulcus. Its primary functions include cleansing the sulcus by flushing out bacteria and debris, and providing antimicrobial agents and immune cells. This helps to maintain the health of the periodontal tissues and prevent infection, making it a crucial protective mechanism.

Free CPT Periodontal Anatomy & Physiology Questions and Answers

What is the primary function of the periodontal ligament?