Dental Anatomy Ppt jo3p

DENTAL ANATOMY AND MASTICATORY DYNAMICS

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From Apprentice

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George Washington’s ‘Teeth’

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20th century dentures

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From apprentice to professional

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Restorative Dentistry on typodont Procedures executed by 2nd year Dental Student www.rxdentistry.net

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Start notes from here

Masticatory / Gnathological System

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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 www.rxdentistry.net

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Sagittal view of skull: Jaws: Maxilla – non-movable Mandible - movable

Temporomandibular jt

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Mixed Dentition: Primary /Deciduous and Permanent

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Determination of age from teeth present

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6 year molar

LI + CI 8 yr 7 yr www.rxdentistry.net

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Permanent Teeth

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Maxillary ANTERIOR

Mandibular ANTERIOR

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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)

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Maxillary PreMolars

Mandibular PreMolars www.rxdentistry.net

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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)

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Maxillary Molars

Mandibular Molars www.rxdentistry.net

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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)

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Division  Arches  Maxillary

Mandibular

 Quadrants  Maxillary Arch  Right quadrant  Left quadrant

Mandibular Arch Right quadrant Left quadrant

 Sextants  Maxillary Arch  Right posterior sextant  Anterior sextant  Left posterior sextant

Mandibular Arch Right posterior sextant Anterior sextant Left posterior sextant

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Maxillary Arch

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RIGHT LEFT Left

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Max Right quadrant

Maxillary Arch

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Maxillary Arch

Max Left quadrant

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Maxillary Arch Max Left Posterior sextant

Max Right Posterior sextant

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CROWN coronal Cervical line ROOT radicular

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Incisal (ant) Occlusal (post) CROWN coronal

Cervical line

ROOT radicular APEX apical

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Right

Midline

Left

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Right

Midline

Left

Mesial – towards midine Distal

Away from midline

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Right

Midline

Left

M D M D

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Right UNIVERSAL SYSTEM

7

8

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Left

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6

11

5 4 3

14

2 1

15 -missing

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missing

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Mandible numbering system 32 missing

missing

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17

18

30

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29 28 27

26

22

20 21

25/24 23

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Name / number the teeth Using Universal # System

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Name / number the teeth Using Universal # System!

45 6

7

8

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9 10 11

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8

9

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More terminology FACIAL View

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More terminology  Views / aspects of teeth  Facial

 Lingual  Mesial (a proximal surface)  Distal ( a proximal surface)

 Occlusal (posterior) / Incisal (anterior)

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#8

midline

DISTAL

MESIAL

INCISAL

Facial View www.rxdentistry.net

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Apical Facial View

Mesial

Distal

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Apical APICAL

MIDDLE CERVICAL CERVICAL Mesial MIDDLE

Distal

INCISAL Incisal www.rxdentistry.net

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Apical

Mesial

Middle

middle

Mesial Middle Incisal www.rxdentistry.net

Distal Distal 45

Proximal View Apical Facial

Middle

Lingual

Cervical Cervical

Facial

Middle

Lingual

Incisal www.rxdentistry.net

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Proximal

Facial Trapezoid

Triangle Incisors

PM

Molars

Rhomboid PM

Molars www.rxdentistry.net

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Facial of all teeth trapezoidal

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areas  Area on proximal surface of a tooth – either M or D – when teeth are in good alignment –

which touches adjacent tooth

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areas  Area on proximal surface of a tooth – either M or D – when teeth are in good alignment –

which touches adjacent tooth

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Variations yet characteristics for identification

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Maxillary Incisors Purpose Along with mandibular incisors  Esthetics  Phonetics - speech

 Incising / cutting

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Information* and Photos with black background – Tooth Atlas

* Information with asterisk from Tooth Atlas CD www.rxdentistry.net

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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.

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Why DA ?

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5 views of teeth  Facial  Labial (anterior)  Buccal (posteriors)

 Lingual  Mesial  Distal  Incisal / Occlusal  Ant / posterior

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Maxillary Central - #8 Facial view  Crown:Root - 11mm: 13 mm  M-Inc Corner - 90 degrees  D-Inc Corner  M  D -

D

M

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rounded Incisal Junction (Incisal/Middle)

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Maxillary Central - #8 Facial view  Size  MD

widest ANT tooth  Inc-Cerv longest Crown

 M outline  D outline

straight sltly rounded

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Maxillary Central - #8 Facial view  Size  MD

widest ANT tooth  Inc-Cerv longest Crown

 M outline  D outline

straight sltly rounded

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Maxillary Central - #8 Lingual view  Marginal ridges (MR)  MMR > DMR  Moderately pronounced

 Cingulum  Moderately pronounced  D located

 Fossa  Moderate depth www.rxdentistry.net

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Maxillary Central - #8 Lingual view  Marginal ridges (MR)  MMR > DMR  Moderately pronounced

 Cingulum  Moderately pronounced  D located

 Fossa  Moderate depth www.rxdentistry.net

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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)

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Maxillary Central - #8 Distal view  Incisal Edge  Facial surface

sltly F to . root axis flat

 CEJ (cervical line) deeper on M  Root:  M surface – flat w/ depression  (D surface – convex w/ no depression)

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Maxillary Central - #8 Incisal view  Geometric  Triangular  MD > FL 

 Facial  flat

 Cingulum  Distal location www.rxdentistry.net

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Maxillary Lateral Incisor Most variable ANTERIOR tooth

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Maxillary Lateral - #7 Facial view  Crown:Root - 10mm: 13 mm  M-Inc Corner - rounded  D-Inc Corner -

v. rounded

 M -

Junction* Middle

 D -

*(Incisal/Middle) www.rxdentistry.net

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Maxillary Lateral - #7 Facial view  Crown:Root - 10mm: 13 mm  M-Inc Corner - rounded  D-Inc Corner -

v. rounded

 M -

Junction* Middle

 D -

*(Incisal/Middle) www.rxdentistry.net

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Maxillary Lateral - #7 Facial view  Size  MD

smaller than CI  Inc-Cerv shorter CI

 M outline

rounded

 D outline

v. rounded

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Maxillary Lateral - #7 Facial view  Size  MD

smaller than CI  Inc-Cerv shorter CI

 M outline

rounded

 D outline

v. rounded

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Maxillary Lateral and Central - #7 - #8 Facial view

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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

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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

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Maxillary Lateral - #7 Mesial view  Incisal Edge

sltly F to . root axis

 Facial surface

more rnd

 CEJ (cervical line) deeper on M  Root:  M surface – flat w/ depression  (D surface – flat / no depression)

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Maxillary Lateral - #7 Distal view  Incisal Edge

sltly F to . root axis

 Facial surface

more rnd

 CEJ (cervical line) deeper on M  Root:  M surface – flat w/ depression  (D surface – flat / no depression)

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Maxillary Lateral - #7 Incisal view  Geometric  Rnded  MD > FL 

 Facial  rnd

 Cingulum  Centered www.rxdentistry.net

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Thanx

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