Maxilla, mandible, quadrants, types of teeth, universal numbering system

Maxilla, mandible, quadrants, types of teeth, universal numbering system

1. Chapter 1 Nomenclature

2. Objectives At the completion of this chapter, you will be able to identify by name The two dental arches Permanent and deciduous teeth Anterior and posterior teeth Teeth in the order in which they are positioned in the dental arch

3. Objectives (cont’d.) You will also know The function of each type of tooth The eruption sequence of deciduous and permanent teeth

4. The Dentition Teeth arranged to form two arches, named by the bone which composes it Maxilla forms the maxillary or upper arch Mandible forms mandibular or lower arch Two arches make up one dentition or set of teeth Two dentitions over a lifespan P rimary (deciduous) and permanent

5. Primary or Deciduous Dentition Begin to emerge into mouth about 6-8 months age Teeth erupt following a developmental schedule 20 teeth 10 maxillary and 10 mandibular Fully erupt by age 2½-3 years Eventually replaced by permanent teeth

6. Permanent Dentition 32 permanent teeth 16 maxillary and 16 mandibular Mandibular first molar is the first permanent tooth Between ages 5 & 6 Erupts next to last primary molar

7. Permanent Dentition

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9. Permanent Dentition Between ages 5-12, mixed dentition is present Both deciduous and permanent teeth in the mouth together Permanent teeth that replace the deciduous are referred to as succedaneous

10. Names and Functions of the Teeth People are heterodonts , many teeth types Incisors Canines Premolars M olars Types of teeth in maxillary arch are same as mandibular Arches are divided into right & left quadrants

11. Primary or Deciduous Teeth Similar in shape and function to permanent teeth but smaller Incisors: two central, two lateral Canines : one in each arch corner Molars : two first, two second 10 total per arch No primary premolars

12. Permanent Teeth Incisors are the four sharp-edged front teeth Two central, two lateral Incises/cuts food Canines, aka cuspids, corner teeth with one pointed cusp Holds/tears food

13. Permanent Teeth Premolars aka bi cuspids , posterior teeth with two cusps Named by sequence from front to back in arch Crushes/tears food Molars are broad back teeth, several cusps Named by sequence from front to back in arch Chews/crushes/grinds food: mastication

14. The Arrangement of the Teeth Anterior teeth Front of the mouth, include incisors and canines Posterior teeth Back of the mouth, include premolars and molars

15. Tooth Description Tooth designated by dentition, arch quadrant and name Example Dentition: Permanent Arch: Mandibular Quadrant: Right Tooth: Central Incisor

16. When identifying a specific tooth, list the dentition, arch, quadrant, and tooth name in that order. e.g., permanent [dentition], mandibular [arch], right [quadrant], central incisor [tooth]. Naming and Coding Teeth 17

17. The Universal system uses the Arabic numerals 1 through 32 for permanent teeth and the letters A through T for the primary teeth. Universal System 18

18. Universal System The number 1 is assigned to the most posterior molar on the upper right. The permanent maxillary right third molar. 19

19. Universal System The letter A is given to the primary maxillary right second molar, and the letter T to the primary mandibular right second molar. 20

20. You count teeth starting with the most posterior tooth on the UR going to the UL Then you drop down from the UL to the LL and count to the LR. Universal Numbering System 21 1 3 2 4

21. Which teeth numbers are located in quadrant 1? What teeth numbers are located in quadrant 2? What teeth numbers are located in quadrant 3? What teeth numbers are located in quadrant 4? Practice Exercise 22

22. What are the teeth numbers for the maxillary canines? What are the teeth numbers for the mandibular central incisors? What are the teeth numbers for the maxillary first molars? What are the teeth numbers for the mandibular third molars? Practice Exercise 23

23. What teeth numbers are considered to be maxillary anterior teeth? What teeth numbers are considered to be mandibular anterior teeth? What are the teeth numbers for the posterior teeth in quadrant 1? Practice Exercises 24

24. https://www.animated-teeth.com/questions-answers/teeth-numbers/tooth-numbering-quiz-1.html https ://www.animated-teeth.com/questions-answers/tooth-classification/teeth-names.html https :// www.animated-teeth.com/questions-answers/tooth-anatomy/types-of-teeth.html Practice Exercise 25

25. Summary Two sets of teeth in life Primary/deciduous dentition consisting of 20 teeth Permanent dentition consisting of 32 teeth Each dentition has several types of teeth shaped to perform specific functions W ork in conjunction with one another to prepare the food for digestion Universal Numbering System 1-32 (permanent) and A-T (deciduous)