Dental Medicine Quiz

What is the origin of bone?

• None of the above

• Endoderm

• Mesoderm

• Ectoderm

Answer explanation

Bone originates from the mesoderm layer during embryonic development.

Which enzyme is important for the precipitation of Hydroxyapatite crystals in bone?

• Alkaline phosphatase

• Acid phosphatase

• ATP ase

• Pyrophosphatase

Answer explanation

Alkaline phosphatase is important for the precipitation of Hydroxyapatite crystals in bone.

Which bone cell is responsible for bone resorption?

• Osteoblasts

• Osteocytes

• Osteoclasts

• Osteoprogenitor cells

Answer explanation

Osteoclasts are responsible for bone resorption by breaking down bone tissue. They play a crucial role in bone remodeling and maintenance.

What is the function of osteocytes in bone tissue?

• Maintain bone tissue

• Bone formation

• Bone resorption

• Release calcium ions

Answer explanation

Osteocytes function to maintain bone tissue by regulating bone remodeling and repair processes.

Which type of bone is found in areas where bone is laid for the first time?

• None of the above

• Bundle bone

• Lamellar bone

• Woven bone

Answer explanation

Woven bone is found in areas where bone is laid for the first time, making it the correct choice among the options provided.

What is the function of the alveolar bone proper?

• Support the sockets of the teeth

• Form the outer part of the alveolar process

• Furnish attachment for periodontal ligament

• Transform red bone marrow into fatty bone marrow

Answer explanation

The alveolar bone proper furnishes attachment for the periodontal ligament, which helps anchor the teeth in their sockets.

What age-related change occurs in the alveolar process leading to mental foramen coming closer to the upper border of the mandible?

• Proximal attrition of teeth

• Loss of teeth and alveolar bone resorption

• Decrease in water content

• Thinning of bone trabeculae

Answer explanation

Loss of teeth and alveolar bone resorption lead to the age-related change in the alveolar process, causing the mental foramen to come closer to the upper border of the mandible.

Which part of the alveolar process contains nutrient canals called Zuckerkandl and Hirschfeld canals?

• Supporting spongiosa

• Inner cortical plate

• Alveolar bone proper

• Outer cortical plate

Answer explanation

The alveolar bone proper contains nutrient canals called Zuckerkandl and Hirschfeld canals.

What is the main function of the supporting spongiosa in the alveolar process?

• Transform red bone marrow into fatty bone marrow

• Support the alveolar bone proper

• Enclose red and fatty bone marrow

• Form the inner wall of the socket

Answer explanation

The main function of the supporting spongiosa in the alveolar process is to enclose red and fatty bone marrow, providing structural support and protection within the bone.

Which type of bone trabeculae is present in the interdental and interradicular septa of the mandible?

• Type II

• Type I

• Bundle bone

• Lamellar bone

Answer explanation

Type I bone trabeculae is present in the interdental and interradicular septa of the mandible.