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Published on : Aug 07, 2014
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Slide 1 - Human Dentition Introduction Dental Anatomy Includes: 1- Nomenclature & terminology. 2- The external morphology and internal composition of individual teeth. 3-How tooth form serves its function. 4- The relationship of teeth to each other and to the jaw bones.
Slide 2 - Dental Anatomy Nomenclature The Jaws & Dental Arches
Slide 3 - A. The maxilla is two bones forming the upper jaw; they are rigidly attached to the skull. B. The mandible is a horse-shoe shaped bone which articulates with the skull by way of the temporo-mandibular joint the TMJ. The Jaws and Dental Arches
Slide 4 - Quadrants: right & left quadrants Maxillary right and left. Mandibular right and left. Right Left Right Left 4 Quadrants
Slide 5 - Functions of Teeth 1- Mastication: teeth are designed to perform this function. Incisors Canine Premolars Molars Chisel like Cutting or incising Wedge like Cutting and tearing At least two projections (cusps). Tearing and grinding Multiple projections (cusps) Grinding
Slide 6 - 4- Growth of jaws: The teeth play a role in the growth of the jaws in some periods of life. 2- Appearance: - Well arranged clean teeth with proper alignment give nice appearance to the face. – Teeth give support to the facial expressions. 3- Speech: for clear pronunciation and production of sound.
Slide 7 - Types of Teeth
Slide 8 - Types of Teeth Posterior Teeth Anterior Teeth for cutting & tearing food
Slide 9 - Anterior Teeth- Upper lateral Central Incisors Canine
Slide 10 - Anterior Teeth- Lower lateral - Central Incisors Canine
Slide 11 - Premolars: (in permanent only) First premolar & Second premolar Upper Lower
Slide 12 - Molars: First & second Upper Lower Wisdom tooth = Third permanent molar
Slide 13 - Types of Dentitions: Primary & Permanent Dentition
Slide 14 - Types of Dentitions: I-Primary Dentition Deciduous ,baby, milk teeth: a. Twenty ( 20) primary teeth. b. 10 in each arch c. 5 in each quadrant In function: 2 years  12 years
Slide 15 - I-Primary Dentition
Slide 16 - Mixed Dentition Period 6 years  12 years Eruption of first permanent molar Shedding of last primary molar
Slide 17 - 6 years  eruption of first permanent molar
Slide 18 - 12 years  Shedding of last primary molar
Slide 19 - II-Permanent Dentition In function: 12 years through out life
Slide 20 - Permanent Teeth
Slide 21 - Palmer Notation System Universal System International FDI System (two digit system) Tooth Identification Systems Numbering or Coding Systems
Slide 22 - 1 - 8 1 1 1-Palmer Notation System 3 4 5 6 7 8 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Right Left for Permanent Teeth 8 - 1 8 - 1 1 - 8
Slide 23 - The permanent teeth are numbered from 1-8 on each side from the midline. Upper right Upper left 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 Lower right Lower left Horizontal and vertical lines = symbol for the quadrant It represents the four quadrants of the dentition as if you are facing the patient. In upper right In upper left In lower right In lower left
Slide 24 - A B C D E Palmer Notation System for Primary Teeth E-A E-A A-E A-E
Slide 25 - The deciduous teeth are lettered from A-E on each side from the midline Upper right Upper left E D C B A A B C D E E D C B A A B C D E Lower right Lower left
Slide 26 - Palmer Notation System
Slide 27 - 2-The International Numbering System “FDI” Federation Dentaire International (the two digit system) The teeth are designated by using two-digits: The first digit of the code is located at the left side of the number and indicates the quadrant: In permanent dentition In deciduous dentition U.R. 1 2 U.L. U.R. 5 6 U.L L.R. 4 3 L. L. L.R. 8 7 L.L.
Slide 28 - 2-International System (Two Digit System) “FDI” Federation Dentaire International 11 12 13 14 15 16 17 18 21 22 23 24 25 26 27 28 31 32 33 34 35 36 37 38 41 42 43 44 45 46 47 48 1 2 3 4 For permanent Teeth First Digit = quadrant
Slide 29 - Permanent teeth 18 17 16 15 14 13 12 11 21 22 23 24 25 26 27 28 48 47 46 45 44 43 42 41 31 32 33 34 35 36 37 38 b- The second digit is located at the right side of the number and indicates the number of the tooth in the quadrant. The two digits should be pronounced separately. Second Digit = Tooth number in the quadrant
Slide 30 - For Primary Teeth 5 6 7 8 First Digit = quadrant 5 6 7 8 51 52 53 54 55 61 62 63 64 65 71 72 73 74 75 81 82 84 83 85 2-International System (Two Digit System) “FDI” Federation Dentaire International First Digit = quadrant
Slide 31 - Primary Teeth 55 54 53 52 51 61 62 63 64 65 85 84 83 82 81 71 72 73 74 75 First Digit = quadrant Second Digit = Tooth number in the quadrant 5 6 7 8 For Primary Teeth
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Slide 33 - Universal system for Permanent Teeth
Slide 34 - Universal System for Primary Teeth
Slide 35 - Macro & Micro-anatomy of Teeth crown neck root
Slide 36 - Surrounding Bone: Crypt  developing tooth Socket  erupted tooth root
Slide 37 - Anatomical Crown & Clinical Crown
Slide 38 - Single-rooted Multi-rooted
Slide 39 - Micro-anatomy of Teeth
Slide 40 - Pulp Cavity 1-Coronal pulp: Pulp chamber Pulp horns 2-Radicular pulp: Root canal Apical foramen
Slide 41 - 2-Radicular pulp: Root canal Apical foramen Pulp Cavity in Root
Slide 42 - Surfaces of Teeth
Slide 43 - Surfaces of teeth are identified by the relationship to surrounding orofacial structures Each tooth has Five surfaces: Facial Lingual, Mesial, and Distal (proximal) Functioning surf. (Incisal) occlusal,
Slide 44 - FACIAL SURFACE any surface on the outside (towards the face) LABIAL is facial surface of the anterior teeth (green), 2. BUCCAL is the facial surface of the posterior teeth (blue).
Slide 45 - Inter-proximal surfaces: Facing towards the midline: MESIAL. Facing away from the midline:  DISTAL Surfaces in between two teeth:
Slide 46 - LINGUAL The surfaces facing the tongue PALATAL on the maxilla.
Slide 47 - Functioning Surfaces: chewing/biting surfaces of teeth : OCCLUSAL: chewing surfaces of posterior teeth INCISAL: the anteriors’ biting surface
Slide 48 - Line and Point Angles Division into Thirds
Slide 49 - Line angle: It is formed by the junction of two surfaces and its name is derived from both surfaces Point angle: It is formed by the junction of three surfaces and its name is derived from these surfaces. Line and Point Angles
Slide 50 - Line Angles of Anterior Teeth
Slide 51 - Line Angles of Posterior Teeth
Slide 52 - Point Angles Meeting of 3 surfaces
Slide 53 - Division into Thirds
Slide 54 - Anatomical Landmarks of the Crown Developmental data: Lobe: It is one of the primary centers of calcification and growth formed during the crown development. Each tooth begins to develop from four lobes or more. The pulp chamber has pulp horns corresponding to these lobes.
Slide 55 - Anterior teeth premolars
Slide 56 - Maxillary molars Mandibular molars
Slide 57 - A- Crown Elevations: They are three small rounded projections of enamel present in the incisal third of newly erupted incisors It is the bulge on the cervical third of lingual surface of the crown in anterior teeth 1-Mamelons 2-Cingulum 3-Cusps They are pyramidal projections on the incisal portion of the canine and on the occlusal surfaces of the premolars and molars
Slide 58 - 4-Tubercle It is a small elevation produced by excessive formation of enamel. Tubercle is noticed at : the palatal surface of E & 6 sometimes at the lingual surface of incisors over the cingulum. N.B. Tubercle differs from cusp , it is formed of enamel only while cusp is formed of pulp horn covered by dentin and enamel.
Slide 59 - Ridge or elevation of enamel forming the margin of the surface of a tooth; on mesial /distal margins of lingual surfaces anterior teeth. mesial & distal margins of occlusal surfaces posterior teeth 5-Ridges Linear ridges: Elevated portions of tooth run in a line named for their location Cervical Incisal Labial Buccal Lingual Marginal Triangular Linear Transverse Ridge Oblique Ridge
Slide 60 - Small , irregularly placed auxiliary grooves. Branches from developmental grooves. They do not denote union of primary lobes. The third molars followed by second permanent molars are characterized by high number of supplemental grooves. B-Crown Depressions Lingual fossa triangular fossae Central fossa 1-Developmental grooves: Shallow grooves that separate cusps or primary parts of teeth Linear Depressions Irregular Depressions 1-Fossa Depression or concavity 2- Supplemental grooves:
Slide 61 - 3- Fissures Found in the bottom of developmental grooves. Result from incomplete union of the primary lobes. Represent a fault in enamel. Linear Depressions Irregular Depressions 2- PITS: b- FAULTY PIT: Develop as a result of incomplete formation of enamel. It is located at the end of the buccal developmental grooves of the lower molars or palatal developmental grooves of the upper molars.
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