1= Teeth nomenclature, numbering, surfaces and angles.pptx

Introduction to dental anatomy 1

1. بسم الله الرحمن الرحيم

2. Dr. Khaled El-Haddad [email protected] 0565536967

3. Introduction to Dental Anatomy (1) (Teeth nomenclature, numbering and surfaces) وَقُل  رَّبِّ  زِدْنِي عِلْمًا   قبل المذاكرة.. المحاضرة ليست 61 شريحة .. صافي الشرائح 35

4. Dental Skills … in brief Course specification = Your rights and duties

5. By the end of this lecture, the student should be able to: 1- Identify the oral cavity parts and its divisions into arches and quadrants. 2- Nominate the permanent and deciduous teeth 3- Apply the different teeth numbering systems. 4- Identify the teeth surfaces and the division of surfaces. 5- Recognize the line and point angles in the teeth.

6. ** Our mission

7. ** Fine details

8. ** Both have their customers

9. The importance of the size of the cingulum in the lingual surface of the tooth (9) is to prevent gingival recession ** Read the following statement

10. Terminology (2 lectures of introduction) Description (Morphology) (Anatomy) Oral physiology ** So, Our main topics:

11. Teeth nomenclature and numbering Step 1 in the terminology

12. I- Sets of dentition 1- deciduous dentition (20 teeth) 2- permanent dentition (32 teeth)

13. 1- Upper (maxillary) arch: Contains: 10 deciduous teeth 16 permanent teeth 2- Lower (mandibular) arch: Contains: 10 deciduous teeth 16 permanent teeth II- Dental arches Each set of dentition has 2 arches

14. استراحة ذهنية Can you tell me where is his right eye?

15. 1- upper right quadrant 2- upper left quadrant 3- Lower left quadrant 4- Lower right quadrant Each quadrant contains 5 deciduous teeth 8 permanent teeth III- Quadrants Each arch has 2 quadrants (each set of dentition has 4 quadrants) 1 2 4 3 1 2 4 3 1 2 3 4 1 2 4 3 Midline

16. IV- Types of teeth 3- Premolars 4- Molars 1- Incisors 2- Canines

17. 5 teeth 2 incisors 1 canine 2 molars How many deciduous teeth in each quadrant ? Central incisor Lateral incisor Canine First molar Second molar

18. 8 teeth 2 incisors 1 canine 2 Premolars 3 molars How many permanent teeth in each quadrant ? Central incisor Lateral incisor Canine First premolar Second premolar First molar Second molar Third molar

19. the 5 deciduous teeth are also called (predecessors) And the 5 succeeding permanent is called ( succedaneous or permanent successor ) The remaining 3 permanent teeth are called permanent ( not called successor, as they are not preceeded by deciduous teeth ) Each deciduous tooth will be replaced by a permanent tooth

20. 1- Permanent central incisors (replacing the deciduous central incisor) 2- Permanent lateral incisor (replacing the deciduous lateral incisor) 3- Permanent canine (replacing deciduous canine) 4- First premolar (replacing the deciduous first molar ) 5- Second premolar (replacing the deciduous second molar ) The 3 permanent molars are erupted directly (not preceeded by deciduous) So, they are called permanent (not successor) Details

21. Very important Deciduous central incisor Deciduous lateral incisor Deciduous canine Deciduous first molar Deciduous second molar First premolar Second premolar Permanent first molar Permanent second molar Permanent third molar 3 permanent successors replacing deciduous teeth of same type 2 permanent successors replacing deciduous teeth of different type 3 permanent not replacing deciduous teeth (not a successor) permanent central incisor Permanent lateral incisor permanent canine

22. Deciduous Summary Permanent

23. Incisors and canines are together called (anterior teeth) Premolars and molars are together called (posterior teeth) Grouping of teeth

24. Revision>>>> I- Sets of dentition 1- deciduous 2- permanent

25. 1- Upper (maxillary) arch: 2- Lower (mandibular) arch: II- Dental arches

26. 1- upper right quadrant 2- upper left quadrant 3- Lower left quadrant 4- Lower right quadrant III- Quadrants 1 2 4 3

27. IV- Types of teeth 3- Premolars 4- Molars 1- Incisors 2- Canines

28. The tooth name contains 4 item I- Permanent or deciduous II- Upper or lower III- Right or left IV- the tooth type Nomenclature of teeth

29. Exercise 1 Deciduous L ower Right Central incisor

30. Exercise 2 Permanent upper Left Central incisor

31. Exercise 3 Deciduous L ower left second molar

32. Exercise 4 Permanent Upper Right First molar

33. permanent upper right central incisor (caries) permanent lower left canine (extraction) permanent upper right first molar (crown) permanent lower left second premolar (endo) permanent lower left lateral and central incisors (missing) permanent upper right third molar (caries) permanent upper left third molar (filling) permanent lower right third molar (crown) permanent upper left lateral incisor (fractured) …………………………………………………. TOO LONG !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ** Dear colleague Dr. Omar

34. Numbering systems Dear Dr. Omar 8 3 1 2 5 8 8 6 1 1 8 Dear Dr. Omar 8 3 1 2 5 8 8 6 1 1 8 C C C F F F M M M E M

35. 1) Universal system (American system) The permanent teeth are represented by numbers (from 1 to 32) The tooth number 1 is : Upper right third molar 1 The tooth number 32 is : Lower right third molar 32

36. The deciduous (primary) teeth are represented by letters (from A to T) What about the deciduous teeth?

37. What is the number of this tooth? Exercise 1 ? Answer: 7

38. 2) Palmer notation system (Zsigmondy system) 1 1- Draw a horizontal line separating upper & lower arches 2- Draw a vertical line separating right & left quadrants 3- write the number of the tooth (if the tooth is permanent) in the corresponding quadrant N.B. there is 8 teeth in the quadrant And the numbering starts from central incisor : 1- central incisor 2- lateral incisor 3- canine 4- first premolar 5- second premolar 6- first molar 7- second molar 8- third molar

39. 2 2 4 4 or or

40. The deciduous teeth are represented by the same method but the teeth are represented by letters (from A to E) not numbers Can you expect the deciduous teeth numbering?

41. 3) Two Digit system (FDI system) (Binomial system) A- each tooth is represented by 2 numbers (no letters) B- the left digit represents the quadrant ** 4 permanent and 4 deciduous quadrants numbered as follows: 5 6 7 8 1 2 3 4 1- permanent upper right quadrant 2- permanent upper left quadrant 3- permanent lower left quadrant 4- permanent lower right quadrant 5- Deciduous upper right quadrant 6- Deciduous upper left quadrant 7- Deciduous lower left quadrant 8- Deciduous lower right quadrant C- the right digit represents the tooth (according to palmers numbering “starting from midline”) FDI: Federation Dentaire Internationale

42. Summary Note: The 2 digits is pronounced separately not as a number (e.g. tooth no #22 is pronounced “TWO TWO ” not “Twenty two”

43. Exercise 8 1 1 4

44. ** Write the FULL name of these teeth 22 34 20 56 6 56= Not applicable

45. Sometimes there is a number which is confusing (indicates tooth with more than one numbering system) Note E.g.: What is the tooth 22? By FDI: It is the permanent upper left lateral incisor By Universal system: It is the permanent lower left canine So, Sometimes : the symbol (#) is used to differentiate between the FDI &Universal system Tooth #22 (This means that we are SURE using the FDI system) Important: This DOESN’T MEAN that if you read in a research or book the statement (tooth 22) that this is SURE a universal system. The FDI system can be also denoted without “#” بالعربي: كل سنة مكتوبة ومعها رمز "#" فهي مكتوبة بال FDI ولكن ليس كل سنة مكتوبة بدون "#" تكون بالضرورة Universal ... ممكن تكون FDI أو Universal

46. For better tooth description .. The tooth will be viewed from 5 aspects (surfaces) Step 2 in the terminology

47. Surfaces of the teeth Lingual surface (towards the tongue) Palatal surface (towards the palate) Can be called lingual also Facial surface (outer surface ) (towards the face) In anterior teeth called (Labial) In posterior teeth called ( buccal )

48. Occlusal surface (masticatory surface of posterior teeth) Inci sal (edge) (masticatory surface of anterior teeth) Mesial surface: facing the neighboring tooth nearer to midline Distal surface: facing the neighboring tooth away from midline Proximal surface: the surface of the tooth facing the neighboring tooth

49. For better surface description .. The surface is divided into thirds Division of the surfaces Root apex Crown Cervical line Root

50. Division of the surfaces horizontally Cervical third Middle third Incisal third Cervical third Middle third Apical third Occlusal third

51. Division of the surfaces horizontally Cervical third Middle third Incisal third Cervical third Middle third Apical third Occlusal third

52. Middle third Distal third Mesial third

53. Middle third lingual third Labial third Buccal third

54. Line angles (angle made by 2 planes) Line angles and point angles Point angles (angle made by 3 planes)

55. Line angles occlusal Buccal Mesial Mesiobuccal line angle Occlusobuccal line angle Distobuccal line angle

56. 8 Line angles in posterior teeth Occluso -distal Occluso -lingual Disto-buccal disto -lingual Occluso-buccal Occluso-mesial Mesio -lingual mesio-buccal

57. 6 Line angles in Anterior teeth No inciso -distal Inciso -lingual Disto -labial disto -lingual Inciso -labial Mesio -lingual mesio -labial No inciso-mesial

58. Point Angles Occluso-Disto - lingual

59. 4 point angles (either in anterior or posterior) 5 1 4 3 2 8 6 7

60. 4 point angles (either in anterior or posterior)

61. رب زدني علمًا ماذا تعلمت؟ ماذا كنت تتوقع ولم تجده؟

62. Wheeler's Dental anatomy , physiology, and occlusion". APA (6th ed.) Ash, M. M. (1993).  Ads AH, El- Zainy MA, , Shenaishen SF, Halawa AM. Fundamentals Of Tooth Morphology&Physiology . Faculty of Dentistry Ain Shams University. 2020.