Dental Terminology

Polyphyodont

continuously replaced teeth

Example: sharks continually regrow their teeth throughout their lives

Diphyodont

Two successive sets of teeth

Example: Humans have baby teeth and adult teeth

Monophyodont

one set of teeth in a lifetime

Example: mice

Homodont

All teeth have the same morphology

Example: dolphins, whales

Heterodont

More than one kind of tooth morphology

Example: Humans

What is Primary Dentition (deciduous dentition)?

How many total teeth?

The first teeth to erupt into the oral cavity

20 teeth

What is Transitional Dentition (mixed dentition)?

When a child has both primary teeth and permanent teeth in their mouth.

How many total teeth in the permanent dentition?

Normally 32 teeth (permanent adult teeth)

What are succedaneous teeth?

Permanent teeth that replace primary (deciduous) teeth

What are accessional teeth?

permanent molars (have no primary precursors)

Another name for canines?

cuspids

Another name for premolars?

bicuspids (1st and 2nd)

Number the dentition for primary teeth.

(right --> left)

Upper Right: ABCDE

Upper Left: FGHIJ

Lower Right: TSRQP

Lower Left: ONMLK

Number the dentition for permanent teeth.

(right --> left)

Upper Right: 12345678

Upper Left: 9 10 11 12 13 14 15 16

Lower Right: 32 31 30 29 28 27 26 25

Lower Left: 24 23 22 21 20 19 18 17

Permanent teeth per arch formula:

(I 2/2)(C 1/1)(P 2/2)(M 3/3) = 16

Primary teeth per arch formula:

(I 2/2)(C 1/1)(M 2/2) = 10

Using Palmer Notation, number the dentition for permanent teeth.

(right --> left)

Upper Right: 87654321

Upper Left: 12345678

Lower Right: 87654321

Lower Left: 12345678

Using Palmer Notation, number the dentition for primary teeth.

(right --> left)

Upper Right: EDCBA

Upper Left: ABCDE

Lower Right: EDCBA

Lower Left: ABCDE

3 general rules for favorable permanent eruption:

- Mandibular before maxillary

-Girls before boys

-Thinner boned kids before thicker boned kids

Name these molars:

A. 6's

B. 7's

C. 8's

A. 6's = 6 year old molars

B. 7's = 12 year old molars

C. 8's = wisdom teeth (18-19 year old molars)

Using Palmer Notation, what is the most common sequence of eruption for maxilla?

6-1-2-4-3-5-7-8

6-1-2-4-5-3-7-8

Using Palmer Notation, what is the most common sequence of eruption for mandible?

(6-1)-2-3-4-5-7-8

(6-1)-2-4-3-5-7-8

How long does root completion take after tooth eruption?

2-3 years

Four tissues of tooth:

1. Enamel

2. Dentin

3. Cementum

4. Pulp

alveolar process

Portion of the jaw that supports the tooth

alveolus (plural: alveoli)

the bone of the tooth socket

__________ cannot be differentiated from dentin on a radiograph. Why?

Cementum

similar mineralization

The side of the teeth closest to the lips on anterior teeth is called _________.

labial

The side of the teeth closest to the cheek on posterior teeth is called ________.

buccal

The same side on all teeth is called ________.

facial

Most teeth have ___(a)___ developmental lobes. Some have ___(b)___.

a. 4

b. 5

Mamelon

any one of the three rounded bumps on the newly erupted incisor teeth

Each cusp has _____ cusp ridges.

2

What is a transverse ridge?

a long ridge that forms when two triangular ridges transverses the occlusal surface

What is a fossae?

Shallow/rounded depression in crown of tooth

What is a pit?

Sharp, pinpoint depression at the deepest point of a fossa

Which teeth have a shallow, broad lingual fossa?

anterior teeth - incisors and canine

What is a groove?

linear channel often found between cusps in the depth of the sulcus and between ridges

(aka depressions in the posterior teeth resembling riverbeds and valleys)

What is the purpose of a height contour? (2 reasons)

- Deflect food as to not traumatize tissues

- Allows for location to attach partial dentures

Anterior teeth have _____ named line angles.

6

Posterior teeth have _____ named line angles.

8

All teeth have _____ named point angles.

4

All crowns on the facial or lingual aspect are ______________. (geometric shape)

trapezoidal

Posterior maxillary teeth from the proximal aspect are: (geometric shape)

trapezoidal

Anterior mandibular and maxillary teeth from the proximal aspect are: (geometric shape)

triangular

All teeth from the facial view are: (geometric shape)

trapezoidal