dental anatomy ppt

www.rxdentistry.net 1

DENTAL ANATOMY

AND MASTICATORY

DYNAMICS

From Apprentice


George Washington’s ‘Teeth’


20th

century dentures




From apprentice

to

professional


Restorative Dentistry

on typodont

Procedures executed by

2nd

year Dental Student


Masticatory /

Gnathological System

Start

notes

from here


Masticatory / Gnathological system

Masticatory: Pertaining to chewing

Gnathology Science that deals with

anatomy, histology, physiology, pathology of the jaws and masticatory system as a whole, including the applicable diagnostic, therapeutic and rehabilitative procedures


Frontal view

Sagittal view of skull:

Jaws:

Maxilla – non-movable

Mandible - movable

Temporomandibular jt


Mixed Dentition:

Primary /Deciduous and Permanent


Determination of age from teeth present


6 year molar

LI + CI

8 yr 7 yr


Permanent Teeth


Maxillary

ANTERIOR

Mandibular

ANTERIOR


Anterior Teeth

Maxillary Central Incisor (2 – right and left)

Lateral Incisor (2 – right and left)

Canine (2 – right and left)

Mandibular Central Incisor (2 – right and left)

Lateral Incisor (2 – right and left)

Canine (2 – right and left)


Maxillary

PreMolars

Mandibular

PreMolars


Posterior Teeth - PreMolars

Maxillary

1st Premolar (2 – right and left)

2nd Premolar (2 – right and left)

Mandibular

1st Premolar (2 – right and left)

2nd Premolar (2 – right and left)


Maxillary

Molars

Mandibular

Molars


Posterior Teeth - Molars

Maxillary 1st Molar (2 – right and left)

2nd Molar (2 – right and left)

3rd Molar (Wisdom tooth) (2 – right and left)

Mandibular 1st Molar(2 – right and left)

2nd Molar (2 – right and left)

3rd Molar (Wisdom tooth) (2 – right and left)


Division

Arches Maxillary Mandibular

Quadrants Maxillary Arch Mandibular Arch Right quadrant Right quadrant

Left quadrant Left quadrant

Sextants Maxillary Arch Mandibular Arch Right posterior sextant Right posterior sextant

Anterior sextant Anterior sextant

Left posterior sextant Left posterior sextant


Maxillary Arch


Left

RIGHT

LEFT


Maxillary Arch

Max Right

quadrant


Maxillary ArchMax Left

quadrant


Maxillary Arch

Max Left

Posterior

sextant

Max Right

Posterior

sextant



CROWN

coronal

ROOT

radicular

Cervical line


Incisal (ant)

Occlusal (post)

CROWN

coronal

ROOT

radicular

APEX

apical

Cervical line


Right Midline Left


Right Midline Left

Mesial – towards midine

Distal

Away from midline


Right Midline Left

M

D

M

D


Right Left8 9

7 10

6 11

5

4

3 14

2 15

1 -missing missing 16

UNIVERSAL

SYSTEM



Mandible numbering system

32 missing missing 17

31 18

30 19

29

28 20

21

27 22

26

25/24 23

Name / number the teeth

Using Universal # System


Name / number the teeth

Using Universal # System!

4 5 6 7 8 9 10 11


8 9


More terminology

FACIAL

View


More terminology

Views / aspects of teeth

Facial

Lingual

Mesial (a proximal surface)

Distal ( a proximal surface)

Occlusal (posterior) / Incisal (anterior)


# 8

Facial

View

INCISAL

MESIALDISTAL

midline



Apical

Facial View

Mesial Distal

Incisal www.rxdentistry.net 43

Apical

Mesial Distal

Incisal

APICAL

MIDDLE

CERVICAL

CERVICAL

MIDDLE

INCISAL


Apical

Mesial Middle Distal

Incisal

middle

Mesial Middle Distal


Apical

Facial Middle Lingual

Cervical

Cervical

Facial Middle Lingual

Incisal

Proximal

View


Proximal Facial

Incisors

PM Molars

PM Molars

Trapezoid

Rhomboid

Triangle


Facial of all teeth -trapezoidal


Contact areas

Area on proximal surface of a tooth – either M or D – when teeth are in good alignment –which touches adjacent tooth


Contact areas

Area on proximal surface of a tooth – either M or D – when teeth are in good alignment –which touches adjacent tooth



Variations yetcharacteristics for identification


Maxillary Incisors

Purpose

Along with mandibular incisors

Esthetics

Phonetics - speech

Incising / cutting


Information* and Photos with black background – Tooth Atlas

* Information with asterisk from Tooth Atlas CDwww.rxdentistry.net 54

Maxillary Central Incisor

Development*

The initiation of calcification is between 3 and 4 months.

The completion of enamel formation is 4 to 5 years.

The eruption is between 7 to 8 years.

Root development complete at 10 years.


Why DA ?



5 views of teeth

Facial

Labial (anterior)

Buccal (posteriors)

Lingual

Mesial

Distal

Incisal / Occlusal

Ant / posterior


Maxillary Central - #8 -Facial view

Crown:Root - 11mm: 13 mm

M-Inc Corner - 90 degrees

D-Inc Corner - rounded

M contact - Incisal

D contact - Junction (Incisal/Middle)

www.rxdentistry.net 59D M


Size

MD widest ANT tooth

Inc-Cerv longest Crown

M outline straight

D outline sltly rounded



Size

MD widest ANT tooth

Inc-Cerv longest Crown

M outline straight

D outline sltly rounded


Maxillary Central - #8 -Lingual view

Marginal ridges (MR) MMR > DMR

Moderately pronounced

Cingulum Moderately pronounced

D located

Fossa Moderate depth


Maxillary Central - #8 -Lingual view

Marginal ridges (MR) MMR > DMR


Cingulum Moderately pronounced

D located

Fossa Moderate depth


Maxillary Central - #8 -Mesial view

Incisal Edge sltly F to . root axis

Facial surface flat

CEJ (cervical line) deeper on M

Root: M surface – flat w/ depression

(D surface – convex w/ no depression)


Maxillary Central - #8 -Distal view


Facial surface flat



(D surface – convex w/ no depression)


Maxillary Central - #8 -Incisal view

Geometric

Triangular

MD > FL

Facial

flat

Cingulum

Distal location


Maxillary Lateral IncisorMost variable ANTERIOR tooth



Maxillary Lateral - #7 -Facial view


M-Inc Corner - rounded

D-Inc Corner - v. rounded

M contact - Junction*

D contact - Middle

*(Incisal/Middle)




M-Inc Corner - rounded

D-Inc Corner - v. rounded

M contact - Junction*

D contact - Middle

*(Incisal/Middle)



Size

MD smaller than CI

Inc-Cerv shorter CI

M outline rounded

D outline v. rounded



Size

MD smaller than CI

Inc-Cerv shorter CI

M outline rounded

D outline v. rounded


Maxillary Lateral and Central - #7 - #8 -

Facial view


Maxillary Lateral - #7 -Lingual view

Marginal ridges (MR) MMR > DMR Moderately pronounced More than CI

Cingulum More pronounced than CI Centered

Fossa Moderate depth Pits / groove variation


Maxillary Lateral - #7 -Lingual view

Marginal ridges (MR)

MMR > DMR


More than CI

Cingulum

More pronounced than CI

Centered

Fossa

Moderate depth

Pits / groove variation



Maxillary Lateral - #7 -Mesial view


Facial surface more rnd



(D surface – flat / no depression)


Maxillary Lateral - #7 -Distal view


Facial surface more rnd



(D surface – flat / no depression)


Maxillary Lateral - #7 -Incisal view

Geometric

Rnded

MD > FL

Facial

rnd

Cingulum

Centered


Thanx


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dental anatomy ppt