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366538100-dental-anatomy-1- for dental ppt.ppt
- 1. DENTAL ANATOMY DENTAL ANATOMY AriCahyono, Ari Cahyono, Department of General Dental Practice And Department of General Dental Practice And Oral & Maxillofacial Radiology Oral & Maxillofacial Radiology Faculty of dentistry University of Jember
- 2. 1. Anatomy ofa tooth. 1. Anatomy of a tooth. a. Anatomical crown- portion of tooth a. Anatomical crown- portion of tooth covered covered with enamel with enamel Dental Anatomy Anatomic crown Anatomic crown
- 3. b. b. Clinical crown Clinicalcrown- visible part of tooth - visible part of tooth above the gum line above the gum line. . Anatomical crown Clinical crown Dental Anatomy
- 4. c. Root c. Root (1)Part of tooth embedded in the (1) Part of tooth embedded in the alveolar process and covered by alveolar process and covered by cementum. cementum. Dental Anatomy
- 5. d. d. Apex- taperedend of root tip. Apex- tapered end of root tip. e. e. Apical foramen- Apical foramen- opening at opening at the root tip. the root tip. Dental Anatomy
- 6. 2. Tissues ofthe tooth. 2. Tissues of the tooth. a. Enamel a. Enamel (1) Makes up anatomic crown. (1) Makes up anatomic crown. (2) Hardest material in the human (2) Hardest material in the human body. body. (3) Incapable of remodeling and (3) Incapable of remodeling and repair. repair. Dental Anatomy
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- 8. b. b. Dentin Dentin (1) (1) Makesup bulk of tooth. Makes up bulk of tooth. (2) (2) Covered by enamel on crown Covered by enamel on crown and cementum on the root. and cementum on the root. (3) (3) Not as hard as enamel. Not as hard as enamel. (4) (4) Exposed dentin is often Exposed dentin is often sensitive to cold, hot, sensitive to cold, hot, air, and air, and touch (via dentinal touch (via dentinal tubules). tubules). Dental Anatomy
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- 10. c. Cementum c. Cementum (1)Covers root of tooth. (1) Covers root of tooth. (2) Overlies the dentin and joins (2) Overlies the dentin and joins the enamel at the cemento- the enamel at the cemento- enamel enamel junction (CEJ). junction (CEJ). (3) (3) Primary function is to anchor Primary function is to anchor the tooth to the bony socket the tooth to the bony socket with attachment fibers. with attachment fibers. Dental Anatomy
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- 12. d. Pulp d. Pulp (1)Made up of blood vessels (1) Made up of blood vessels and nerves entering through and nerves entering through the apical foramen. the apical foramen. (2) Contains connective tissue, (2) Contains connective tissue, which aids interchange which aids interchange between pulp and dentin. between pulp and dentin. Dental Anatomy
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- 15. Types of Dentition Typesof Dentition 1. Deciduous (baby) teeth 1. Deciduous (baby) teeth a. Twenty ( 20) primary teeth. a. Twenty ( 20) primary teeth. b. Arches - maxillary and mandibular. b. Arches - maxillary and mandibular. c. Quadrants - each arch divided in c. Quadrants - each arch divided in half. half. (1) Maxillary right and left. (1) Maxillary right and left. (2) Mandibular right and left. (2) Mandibular right and left.
- 16. d. Teeth ineach quadrant. (1) Central incisor (2) Lateral incisor (3) Cuspid (4) 1st molar (5) 2nd molar Deciduous Teeth Deciduous Teeth
- 17. e. Anterior andposterior teeth. e. Anterior and posterior teeth. (1) Anterior - centrals, laterals, (1) Anterior - centrals, laterals, and cuspids. and cuspids. (2) Posterior - molars. (2) Posterior - molars. Deciduous Teeth Deciduous Teeth
- 18. Types of Dentition Typesof Dentition 2. Permanent teeth. 2. Permanent teeth. a. Thirty-two (32) permanent a. Thirty-two (32) permanent teeth. teeth. b. Arches - maxillary b. Arches - maxillary & mandibular. & mandibular. R L
- 19. 1. Facial -next to cheeks & lips . 1. Facial - next to cheeks & lips . a. Labial- anterior facial. a. Labial- anterior facial. b. Buccal - posterior facial. b. Buccal - posterior facial. 2. Lingual- next to tongue. 2. Lingual- next to tongue. 3. Mesial - towards midline, an imaginary line 3. Mesial - towards midline, an imaginary line between central incisors. between central incisors. Tooth Surfaces Tooth Surfaces
- 20. 4. Distal- awayfrom midline. 4. Distal- away from midline. 5. Incisal- cutting edge of anterior teeth. 5. Incisal- cutting edge of anterior teeth. 6. Occlusal- chewing surface of the posterior 6. Occlusal- chewing surface of the posterior teeth. teeth. Tooth Surfaces Tooth Surfaces
- 21. 7. Proximal surfaces- mesial 7. Proximal surfaces - mesial or distal surface of a tooth or distal surface of a tooth lying next to another tooth. lying next to another tooth. 8. Interproximal space 8. Interproximal space (embrasure) - spaces between (embrasure) - spaces between teeth, filled with hard and teeth, filled with hard and soft tissue (interdental papilla). soft tissue (interdental papilla). Tooth Surfaces Tooth Surfaces
- 22. Lecture Overview Primary Dentition •GeneralMorphological considerations •Implications of Primary tooth morphology
- 23. Primary Dentition • 20primary teeth as compared to 32 permanent teeth • No premolars in the primary dentition • The primary molars are replaced by the premolars • The permanent molars erupt distal to the primary second molars
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- 25. Crown of PrimaryTeeth • Shorter • Narrower occlusal table • Constricted in the cervical portion • Thinner enamel and dentin layers • Enamel rods in the cervical area directed occlusally • Broad and flat contacts • Color is usually lighter
- 26. Crown of PrimaryTeeth •Prominent mesio-buccal •cervical bulge seen in primary molars •Incisors have no developmental grooves or mammelons
- 27. Primary Crown Anatomy •Mandibular Incisors- central is symmetrically flat when viewed from buccal, lateral has a more rounded DI angle • Maxillary Incisors- central is only tooth that has a greater width than height • Maxillary 1st Molar- unique look, 3 cusps • Mandibular 1st Molar- 4 cusps, transverse ridge dividing occlusal surface
- 28. Primary Crown Anatomy •Canines- maxillary is long and sharp, mandibular has similar shape but smaller • Maxillary 2nd Molar - resembles permanent maxillary first molar but smaller • Mandibular 2nd Molar- resembles permanent mandibular first molar but smaller
- 29. Pulps of PrimaryTeeth • Relatively larger • Pulp horns are closer to the outer surface • Great variation in size and location • Mesial pulp horn is higher • Pulp chamber shallow • Form of the pulp follows the external anatomy • Usually a pulp horn under each cusp
- 30. Roots of PrimaryTeeth • Roots of anterior teeth are narrower mesiodistally • Posterior teeth have longer and more slender roots in relation to crown size • Molar roots flare more as they approach the apex • Apical foramina may be larger and accessory canals often larger and more numerous
- 31. Summary • Primary teethhave : - Thinner enamel and dentin layers - Pulp horns closer to the outer surface - Mesial pulp horn much higher - Relatively larger pulps - Enamel rods direct slightly occlusally in the cervical area - Cervical area is constricted significantly - Roots flare as they approach the apex - More tortuous and irregular pulp canals
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