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

Carnassial teeth are found in:

  1. herbivores

  2. carnivores

  3. omnivores

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

Carnassial teeth are specialized blade-like premolars or molars that shear flesh like scissors. They are characteristic of carnivores like cats and dogs. Herbivores have grinding molars, omnivores have mixed dentition, detrivores are not a standard dental category.

Multiple choice

Epidermal teeth are present in:

  1. cyclostomes

  2. anurans

  3. reptiles

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Epidermal teeth refer to tooth-like dermal structures (denticles) in various vertebrates. Cyclostomes have keratinized oral teeth, some anurans have denticles, and certain reptiles display similar dermal tooth structures - all represent forms of epidermal dentition.

Multiple choice

The most contagious of the oral papillary lesions is

  1. fibromatosis gingivae

  2. focal epithelial hyperplasia

  3. fordyce's granules

  4. benign migratory glossitis

  5. cheilitis granulomatosa
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Focal epithelial hyperplasia is the most contagious of the oral papillary lesions.

Multiple choice

Triple rooted premaxillary teeth are found in ___________.

  1. homonidae

  2. ceboids

  3. anthropoid

  4. In all of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Triple-rooted premaxillary teeth (premaxilla with three tooth roots) is a dental characteristic found in anthropoids, which include monkeys, apes, and humans. This distinguishes them from other primate groups like ceboids (New World monkeys) and the family Hominidae as a broader category.

Multiple choice

Independent part of face is not formed by ________ in 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 independent part of the face is not formed by the premaxilla, as the premaxilla fuses with the maxilla early in development. The palate, maxillary suture, and maxilla all contribute to facial formation. In humans, unlike some other vertebrates, the premaxilla is not an independent facial element.

Multiple choice

The stellate reticulum shows metaplastic changes in

  1. granular cell ameloblastoma

  2. basal cell type of ameloblastoma

  3. acanthomatous ameloblastoma

  4. desmoplastic ameloblastoma

  5. plexiform ameloblastoma
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The stellate reticulum shows metaplastic changes in acanthomatous ameloblastoma.

Multiple choice

Which of the following statements is/are true?

  1. A cold test indicates a vital pulp regardless of whether the pulp is normal or abnormal.

  2. A heat test is a test for pulp vitality.

  3. An improper response to heat indicates either the tooth has pulpal or periapical disease.

  4. The frozen carbon dioxide is not reliable method of cold pulp testing.

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

This is correct statement.