Teeth - Chapter 23

How many baby teeth are there?

20

Periodontal ligament

Forms fibrous joint called gomphosis

How many molars do adults have?

12 = 6 on top, 6 on bottom = first, second, third

How many permanent teeth are there?

32

How many canines do adults have?

4 = 2 on top, 2 on bottom

How many canines do babies have?

4 = 2 on top, 2 on bottom

How many central incisors do adults have?

4 = 2 on top, 2 on bottom

How many central incisors do babies have?

4 = 2 on top, 2 on bottom

How many lateral incisors do adults have?

4 = 2 on top, 2 on bottom

How many lateral incisors do babies have?

4 = 2 on top, 2 on bottom

How many premolars do adults have?

8 = 4 on top, 4 on bottom = first and second

How many premolars do babies have?

8 = 4 on top, 4 on bottom = first and second molars

What is another name for premolars?

Bicuspids

Cementum

Calcified connective tissue

Root

Connected to crown by neck

2 major regions of teeth

Crown Root

What is another name for canine teeth?

Cuspid teeth

Dental cavities

Demineralization of enamel and dentin from bacterial action = dental plaque

Crown

Exposed part above gingiva (gum)

Gingiva

Gum

Dentin

Maintained by odontoblasts of pulp cavity

Gingivitis

Plaque calcifies to form calculus (tartar)

Pulp cavity

blood vessels and nerves (pulp)

Cusp

top ridges