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

Which of the following is false about Taurodontism?

  1. Taurodontism is due to failure of Hertwig's sheath to invaginate at proper horizontal level.

  2. Mostly molars are involved in Taurodontism.

  3. The pulp chambers are extremely large in Taurodontism.

  4. Taurodontism is associated with Rubinstein-Taybi syndrome.

  5. The body of tooth roots is short in Taurodontism.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taurodontism is associated with Klinefelters syndrome.

Multiple choice

Which of the following statements is not correct?

  1. Honey comb appearance is seen in Adenoid cystic carcinoma.

  2. Pickets fence appearance is seen in Odontogenic keratocyst.

  3. Saw tooth retepegs appearace is seen in Leukoplakia.

  4. Starry sky appearance is seen in Burkit's lymphoma.

  5. Jigsaw puzzle appearance of bone is seen in Paget's disease.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Saw tooth retepegs appearace is seen in Lichen planus.

Multiple choice

Normal consistency of gingiva is

  1. soft

  2. firm and resilient

  3. hard

  4. firm and leathery

  5. hard and leathery
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Normal consistency of gingiva is firm and resilient.

Multiple choice

Which of the following statements is/are true?

  1. Attached gingiva is stippled.

  2. Loss of stippling is reversible.

  3. Loss of stippling is a common sign of gingival disease.

  4. Stippling is seen on only attached gingiva.

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All of the above statements are true.

Multiple choice

Which of the following statements is incorrect?

  1. With the increase in age, keratinization of gingiva increases.

  2. With the increase in age, keratinization of gingiva decreases.

  3. With the increase in age, width of the attached gingiva increases.

  4. With the increase in age, number of elastic fibers in the periodontal ligament increases.

  5. Keratinization of gingiva is maximum on hard palate.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is not true statement.

Multiple choice

In periodontal ligament, there is

  1. Type I collagen

  2. Type II collagen

  3. Type III collagen

  4. Type IV collagen

  5. Type V collagen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Type I collagen is present in principal fibres of periodontal ligament.

Multiple choice

Odontoplasty is indicated in

  1. Grade I furcation involvement

  2. Grade II furcation involvement

  3. Grade III furcation involvement

  4. Grade IV furcation involvement

  5. Grade II and Grade III furcation involvement
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Grade I furcation involvement : Incipient lesions

Multiple choice

Gingiva in children is

  1. more keratinized and more stippled

  2. more keratinized and less stippled

  3. less keratinized and more stippled

  4. less keratinized and less stippled

  5. none of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Attached gingiva appears less dense than in adults.