dental anatomy ppt
TRANSCRIPT
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DENTAL ANATOMY
AND MASTICATORY
DYNAMICS
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
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Masticatory /
Gnathological System
Start
notes
from here
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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
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Frontal view
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
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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
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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
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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 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
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Maxillary Arch
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Left
RIGHT
LEFT
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Maxillary Arch
Max Right
quadrant
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Maxillary ArchMax Left
quadrant
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Maxillary Arch
Max Left
Posterior
sextant
Max Right
Posterior
sextant
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CROWN
coronal
ROOT
radicular
Cervical line
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Incisal (ant)
Occlusal (post)
CROWN
coronal
ROOT
radicular
APEX
apical
Cervical line
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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 Left8 9
7 10
6 11
5
4
3 14
2 15
1 -missing missing 16
UNIVERSAL
SYSTEM
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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
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Name / number the teeth
Using Universal # System!
4 5 6 7 8 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
Facial
View
INCISAL
MESIALDISTAL
midline
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Apical
Facial View
Mesial Distal
Incisal www.rxdentistry.net 43
Apical
Mesial Distal
Incisal
APICAL
MIDDLE
CERVICAL
CERVICAL
MIDDLE
INCISAL
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Apical
Mesial Middle Distal
Incisal
middle
Mesial Middle Distal
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Apical
Facial Middle Lingual
Cervical
Cervical
Facial Middle Lingual
Incisal
Proximal
View
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Proximal Facial
Incisors
PM Molars
PM Molars
Trapezoid
Rhomboid
Triangle
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Facial of all teeth -trapezoidal
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Contact 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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Contact 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 yetcharacteristics 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 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.
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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 - rounded
M contact - Incisal
D contact - Junction (Incisal/Middle)
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Maxillary Central - #8 -Facial view
Size
MD widest ANT tooth
Inc-Cerv longest Crown
M outline straight
D outline sltly rounded
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Maxillary Central - #8 -Facial view
Size
MD widest ANT tooth
Inc-Cerv longest Crown
M outline straight
D outline 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
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Maxillary Central - #8 -Lingual view
Marginal ridges (MR) MMR > DMR
Moderately pronounced
Cingulum Moderately pronounced
D located
Fossa Moderate depth
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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 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 -Incisal view
Geometric
Triangular
MD > FL
Facial
flat
Cingulum
Distal location
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Maxillary Lateral IncisorMost 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 contact - Junction*
D contact - Middle
*(Incisal/Middle)
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Maxillary Lateral - #7 -Facial view
Crown:Root - 10mm: 13 mm
M-Inc Corner - rounded
D-Inc Corner - v. rounded
M contact - Junction*
D contact - Middle
*(Incisal/Middle)
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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
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Thanx
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