Teeth Used for Age Determination
In all animals, which of the following teeth are used for age determination?
- Incisors of lower jaw — Correct Answer
- Canines of lower jaw
- Incisors of upper jaw
- Canines of upper jaw
Explanation:
Correct Answer: Incisors of lower jaw
Age of the animal is determined by incisors of the lower jaw (Table 33 notes). This is the most commonly used method of age determination by dentition.
Methods of Age Determination
- By record keeping
- By physical appearance
- By counting horn rings (Age = N + 2, where N = number of horn rings)
- By dentition — most commonly used method
Horse-Specific Dental Features
- Dental Star — mark on central pulp cavity of incisors
- Galvayne's groove — a groove in upper corner incisor
- Both are related to incisors of horses and help in age determination
Why Other Options Are Wrong
- Canines: Absent in ruminants entirely; not used for age determination.
- Incisors of upper jaw: Absent in ruminants (replaced by dental pad).
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Livestock Production and Management. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
