A06 Dental Anatomy

7/29/2019 A06 Dental Anatomy

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DENTAL ANATOMY

Drg Nursiah Nasution Mkes


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1. Anatomy of a tooth.

a. Anatomical crown- portion of tooth

covered with enamel

Dental Anatomy

Anatomic crown


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b. Clinical crown- visible part of tooth

above the gum line.

Anatom

crownClinical

crown

Dental Anatomy


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c. Root

(1) Part of tooth embedded in thealveolar process and covered by

cementum.

Dental Anatomy


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d. Apex- tapered end of root tip.

e. Apical foramen-opening atthe root tip.

Dental Anatomy


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3. Tissues of the tooth.

a. Enamel

(1) Makes up anatomic crown.(2) Hardest material in the human

body.

(3) Incapable of remodeling and

repair.

Dental Anatomy


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Enamel


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b. Dentin

(1) Makes up bulk of tooth.

(2) Covered by enamel on crownand cementum on the root.

(3) Not as hard as enamel.

(4) Exposed dentin is oftensensitive to cold, hot, air, and

touch (via dentinal tubules).

Dental Anatomy


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Dentin

Enamel

DentinalTubules


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c. Cementum

(1) Covers root of tooth.

(2) Overlies the dentin and joinsthe enamel at the cemento-enamel

junction (CEJ).

(3) Primary function is to anchor

the tooth to the bony socket

with attachment fibers.

Dental Anatomy


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Dentin

Enamel

DentinalTubules

Cementum


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d. Pulp

(1) Made up of blood vessels

and nerves entering throughthe apical foramen.

(2) Contains connective tissue,

which aids interchangebetween pulp and dentin.

Dental Anatomy


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Dentin

Enamel

DentinalTubules

Cementum

Pulp


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4. Periodontiuma. Alveolar process.

(1) Bone extensions of the maxillaeand mandible that supports the

teeth.

(2) Cortical plate is the dense outerlayer of bone covering the spongy

(cancellous) bone

Dental Anatomy


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Dentin

Enamel

DentinalTubules

Cementum

PulpAlveolarProcess

Cortical PlateSpongy Bone


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b. Periodontal ligaments.

(1) Dense connective fibrous

tissues that connect teeth to

the alveolar bone.(2) One end is embedded in

cementum and other end in

bone.(3) Supports and protects the

tooth from normal shock.

Dental Anatomy


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Dentin

Enamel

DentinalTubules

Cementum

PulpAlveolarProcess


PeriodontalLigaments


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c. Gingiva - surrounds the teeth

and covers the alveolar process.

Dental Anatomy


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Dentin

Enamel

DentinalTubules

Cementum

PulpAlveolarProcess


PeriodontalLigaments

Gingiva


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Deciduous Teeth


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Types of Dentition

d. Teeth in each quadrant.

(1) Central incisor

(2) Lateral incisor

(3) Cuspid

(4) 1st molar

(5) 2nd molar


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1. Deciduous (baby) teeth

a. Twenty ( 20) primary teeth.

b. Arches - maxillary and mandibular.

c. Quadrants - each arch divided in

half.

(1) Maxillary right and left.

(2) Mandibular right and left.


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e. Anterior and posterior teeth.

(1) Anterior - centrals, laterals,and cuspids.

(2) Posterior - molars.

Deciduous Teeth


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f. Numbering system.

(1) Alphabetical.

(2) Maxillary - patientsright to left, A thruJ.

(3) Mandibular -

patients left to right,K thru T.

Deciduous Teeth

K

L

M

NOP

Q

R

S

T

A

B

C

DF

H

I

J

EG

R

MAXILLARY

MANDIBULAR


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Types of Dentition

2. Permanent teeth.

a. Thirty-two (32) permanent

teeth.

b. Arches - maxillary

& mandibular.

R L


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c. Quadrants.

(1) Maxillary right and left.

(2) Mandibular right and left. R L

Permanent Teeth


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d. Teeth in each quadrant.

(1) Central incisor.

(2) Lateral incisor.

(3) Cuspid (canine).

Permanent Teeth


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(4) 1st bicuspid

(5) 2nd bicuspid

(6) 1st molar

(7) 2nd molar

(8) 3rd molar

(wisdom tooth)

Permanent Teeth


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e. Anterior and posterior teeth.

(1) Anteriors - central,

lateral and cuspids.

(2) Posteriors - bicuspids

and molars.

Permanent Teeth


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f. Numbering system.

(1) Numerical.

(2) Maxillary-patientsright to left, number

1 thru 16.

(2) Mandibular-patientsleft to right, number

17 thru 32.

R L

Permanent Teeth


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1. Facial - next to cheeks & lips .

a. Labial- anterior facial.

b. Buccal - posterior facial.

2. Lingual- next to tongue.

3. Mesial - towards midline, an imaginary line

between central incisors.

Tooth Surfaces


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4. Distal- away from midline.

5. Incisal- cutting edge of anterior teeth.6. Occlusal- chewing surface of the posterior

teeth.

Tooth Surfaces


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7. Proximal surfaces - mesial

or distal surface of a tooth

lying next to another tooth.

8. Interproximal space

(embrasure) - spaces between

teeth, filled with hard and

soft tissue (interdental papilla).

Tooth Surfaces


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9. Cusps- pronounced elevationson the occlusal surfaces of a

tooth terminating in a conical orrounded surface.

Tooth Surfaces


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Any Questions


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Dental Anatomy

Types of Dentition

Tooth Surfaces

SUMMARY. .


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Central incisor


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labial


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lingual


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mesial


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distal


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Lower wisdon tooth


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Penomoran geligi permanent


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Tooth section


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Tooth x section

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A06 Dental Anatomy