Biology

Dental and Oral Biology

924 Questions

Dental and Oral Biology focuses on the structure, development, and function of teeth and oral tissues. It covers key concepts like dental formulas, tooth eruption, and common oral diseases. These topics are essential for medical and biology entrance examinations.

Dental formulaTooth anatomyMilk teethOral diseasesTooth decay

Dental and Oral Biology Questions

Multiple choice

Pulpal damage is

  1. directly proportional to the amount of dentin removed

  2. not related to the amount of dentin removed

  3. inversely proportional to the amount of dentin removed

  4. related to the diameter of opened dentinal tubules

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dentin is the protective casing of the pulp. Dentin removal will cause damage to the pulp.

Multiple choice

Which of the following statements is/are true?

Statement 1: In cases of acute apical abscess, drainage is usually not through accessed tooth.

Statement 2: The abscess often does not communicate directly with apical foramen.

  1. Statement 1 is trues but statement 2 is false.

  2. Statement 2 is true, but statement 1 is false.

  3. Both statements are usually true.

  4. Both statements are usually false.

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In acute apical abscess, the communication is not yet established with apical foramen and thus, drainage is usually not through the accessed tooth. Hence, both the statements are correct.

Multiple choice

Root Canal Treatment relates to one's :

  1. Kidneys

  2. Teeth

  3. Prostate

  4. Heart
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Root Canal Treatment (RCT) is an endodontic procedure to treat infected tooth pulp and save the natural tooth. It is performed by dentists on teeth, not on kidneys, prostate, or heart.

Multiple choice

Which of the following statements is/are incorrect?

a. Tooth enamel is similar to bone. b. Pulp cavity contains nerves and blood vessels. c. The part of tooth above enamel is called dentine.

  1. Both a and b

  2. Both a and c

  3. Both b and c

  4. Only a

  5. Only c
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer as both these statements are incorrect.

Tooth enamel is harder than bone. It is the hardest part of the human body. The part below the tooth enamel is called dentine.

Multiple choice

An independent part of the face is not formed by _________ in the Homo sapiens.

  1. pre maxilla

  2. palate

  3. maxillary suture

  4. maxilla

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Homo sapiens, the premaxilla fuses with the maxilla during development and does not remain as an independent bone in adults. The palate forms the roof of the mouth, the maxillary suture is a joint between maxillary bones, and the maxilla is the main upper jaw bone.

Multiple choice

Odontoid process is a part of :

  1. Teeth

  2. Thoracic vertebrae

  3. 7th Cervical vertebra

  4. 2nd Cervical vertebra
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Odontoid process is a small upward projection from the 2nd cervical vertebra to articulate with the first vertebra

Multiple choice

Which of the following statements is/are incorrect about oral cancer?

A. It arises as a primary lesion that originates in any of the tissues in the mouth by metastasis. B. Oncogenes are activated as a result of mutation of the DNA. C. Most oral cancers look very similar under the microscope and are called thymic cell carcinoma.

  1. Only A

  2. Only B

  3. Only C

  4. Only A and B

  5. Only B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct. Most oral cancers look very similar under the microscope and are called squamous cell carcinoma.