All Free Oral Anatomy MCQs with Answers

• A. Before lateral incisor
• B. Before first molar
• C. After second molar
• D. After first molar

Explanation: Primary eruption generally proceeds through the incisors, first molars, canines and then second molars.

• A. 2 years
• B. 4 years
• C. 6 years
• D. 8 years

Explanation: The roots of primary teeth are generally completed by about four years, after which they remain stable until physiological resorption…

• A. 10-11 years
• B. 6-7 years
• C. 8-9 years
• D. 8-9 months

Explanation: The maxillary permanent lateral incisor usually erupts at about 8 to 9 years, following the central incisor.

• A. Call and do radiographic survey
• B. Systemic problem
• C. Child has retarded growth
• D. Tell her that it is normal at this age

Explanation: The first primary tooth commonly erupts around six months, but normal eruption may occur earlier or later, so a toothless five-month-old…

• A. At birth
• B. 6 months of intra utrerine life
• C. Before decidous incisors
• D. About 1 year after birth

Explanation: The first permanent molars begin calcifying around birth, making “at birth” the standard developmental landmark.

• A. 6 months in utero
• B. 6 months after birth
• C. 9 months after birth
• D. 9 months in utero

Explanation: The crown of the primary maxillary canine completes enamel formation at approximately 9 months after birth.

• A. 6 weeks in utero
• B. 14 weeks in utero
• C. 16 weeks in utero
• D. 11 weeks in utero

Explanation: The first visible morphological changes of the primary incisors appear at about 11 weeks in utero, when the tooth germs begin showing…

• A. Maxillary canine
• B. Mandibular lateral incisor
• C. Maxillary lateral incisor
• D. Maxillary central incisor

Explanation: The primary maxillary canine usually erupts at about 16 to 20 months, matching a child aged one and a half years.

• A. 9 to 12 weeks in utero
• B. 14 to 17 weeks in utero
• C. 6- to 9 weeks in utero
• D. 17 to 20 weeks in utero

Explanation: Calcification of the primary anterior teeth begins during the middle of intrauterine development, approximately between 14 and 17 weeks.

• A. Calcification of primary teeth starts around birth
• B. Calcification of all primary teeth and few permanent teeth complete at birth
• C. Calcification of all permanent teeth complete at birth
• D. Calcification of primary teeth is almost complete at time of birth

Explanation: Calcification of the primary teeth starts before birth, and the crowns are substantially, though not absolutely, calcified at birth.

• A. Seventh and Twelfth years
• B. Seventh and ninth years
• C. Seventh and tenth years
• D. Seventh and eight years

Explanation: Primary-tooth exfoliation occurs broadly from about 6 to 12 years, as permanent successors resorb the primary roots.

• A. Maxillary incisors
• B. B & D
• C. Mandibular incisors
• D. Mandibular canines
• E. Maxillary canines

Explanation: Primary canines are retained longer than the primary incisors, with maxillary and mandibular canines both persisting until roughly 9 to 12…

• A. 7-8 years
• B. 8-9 years
• C. 9-10 years
• D. 10 - 11 years

Explanation: The mandibular first permanent molar erupts at about 6-7 years and completes its root approximately 2-3 years later, at 9-10 years.

• A. 3-4 years
• B. 10-12 months
• C. 2-3 years
• D. 3-4 months

Explanation: Calcification of the maxillary permanent central incisor begins around 3-4 months after birth, much later than the primary incisors but…

• A. After D
• B. Before B
• C. After B
• D. After E

Explanation: In the primary dentition sequence, the first molar D erupts before the canine C, while the second molar E erupts after it.

• A. Mandibular first molar
• B. Mandibular central incisor
• C. Maxillary central incisor
• D. Maxillary second molar

Explanation: The mandibular central incisor is usually the first deciduous tooth to erupt, commonly around 6-8 months of age.

• A. Superior and facial
• B. Inferior and facial
• C. Inferior and lingual
• D. Superior and lingual

Explanation: Before eruption, permanent mandibular incisor buds lie lingual to the primary incisors and more apically, or inferiorly.

• A. 2-3
• B. 1-1½
• C. 3-4
• D. 4-5

Explanation: Root formation generally continues for about 2-3 years after a permanent tooth erupts.

• A. 6 years
• B. 8 years
• C. 12 years
• D. 17 years

Explanation: By about 17 years, development of nearly all permanent teeth other than the third molars is complete.

• A. Only molars
• B. All teeth except third molars
• C. 1,2,6 in all quadrants
• D. 1,2,4,5,6,7 in all quadrants

Explanation: At around 9 years, the permanent central and lateral incisors and first molars are typically erupted in all quadrants, represented as 1…