Definition: Study of teeth pattern and functions in humans.
Involves:
Arrangement of teeth
Characteristic features (size, shape)
Total number of teeth
Teeth in Humans
Humans typically have 32 teeth.
Humans are described as 'diphyodont.'
Diphyodont Explanation
Diphyodont: Having two sets of teeth.
Not referring to both upper and lower jaw.
Two sets:
Deciduous Teeth: Also known as baby teeth, milk teeth, primary teeth.
Permanent Teeth: Follow after deciduous teeth fall out.
Development of Teeth
Deciduous teeth:
Appear a few months post-birth
Total: 20 teeth
Growth complete by age 2-3.
Permanent teeth:
Begin to develop at age 5.
Total: 32 teeth.
Dentition Patterns
Fixed number and arrangement of teeth.
Dental Formulae: Used to understand dentition patterns.
Human Dental Formula
For an adult human, the dental formula is:
2 1 2 3 / 2 1 2 3
Upper Jaw: 16 teeth total
2 incisors, 1 canine, 2 premolars, 3 molars on each side
Lower Jaw: 16 teeth total
Similar pattern as upper jaw
Total Teeth: 32 (16 upper + 16 lower)
Infant Dental Formula
Infants have 20 milk teeth.
The lecture poses a question on the dental formula for infants.
Conclusion
Understanding human dentition involves knowing the arrangement, characteristics, and formulae governing teeth development and presence in humans. The concept of diphyodont plays a crucial role in distinguishing between the two sets of teeth in a human lifecycle.