Dental Anatomy and Masticatory Dynamics
77
Dental Anatomy and Masticatory Dynamics
description
Dental Anatomy and Masticatory Dynamics. George Washington’s ‘Teeth’. 20 th century dentures. Restorative Dentistry on typodont. Masticatory / Gnathological System. Masticatory / Gnathological system. Masticatory: Pertaining to chewing Gnathology - PowerPoint PPT Presentation
Transcript of Dental Anatomy and Masticatory Dynamics
Dental Anatomy
and Masticatory Dynamics
George Washington’s ‘Teeth’
20th century dentures
Restorative Dentistryon typodont
Masticatory / Gnathological System
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-movableMandible - movable
Temporomandibular jt
Mixed Dentition: Primary /Deciduous and Permanent
Determination of age from teeth present
6 year molar
LI + CI8 yr 7 yr
Permanent Teeth
MaxillaryANTERIOR
MandibularANTERIOR
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)
MaxillaryPreMolars
MandibularPreMolars
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)
MaxillaryMolars
MandibularMolars
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 ArchMax Rightquadrant
Maxillary Arch Max Leftquadrant
Maxillary ArchMax LeftPosteriorsextant
Max RightPosteriorsextant
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
MD
M D
Right Left
8 9 7 10 6 11
5 4 3 14
2 151 -missing missing 16
UNIVERSALSYSTEM
Mandible numbering system 32 missing missing 17 31 18
30 19
29 28 20 21 27 22 26 25/24 23
Name / number the teethUsing Universal # System
Name / number the teethUsing Universal # System!
4 5 6 7 8 9 10 11
8 9
More terminologyFACIAL
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
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
ProximalView
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
PurposeAlong with mandibular incisors
– Esthetics– Phonetics - speech– Incising / cutting
Information* and Photos with black background – Tooth Atlas
* Information with asterisk from Tooth Atlas CD
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)
D M
Maxillary Central - #8 - Facial view
Size– MD widest ANT tooth– Inc-Cerv longest Crown
M outline straight
D outline sltly rounded
Maxillary Central - #8 - Facial view
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– Moderately pronounced
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
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 - Incisal view
Geometric– Triangular– MD > FL
–
Facial – flat
Cingulum– Distal location
Maxillary Lateral IncisorMost variable ANTERIOR tooth
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)
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)
Maxillary Lateral - #7 - Facial view
Size– MD smaller than CI– Inc-Cerv shorter CI
M outline rounded
D outline v. rounded
Maxillary Lateral - #7 - Facial view
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– Moderately pronounced– More than CI
Cingulum– More pronounced than CI– Centered
Fossa– Moderate depth– Pits / groove variation
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)
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)
Maxillary Lateral - #7 - Incisal view
Geometric– Rnded– MD > FL
–
Facial – rnd
Cingulum– Centered
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