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Dental Assisting: Head And Neck Anatomy

Subjects : health-sciences, dentistry

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Vestibule Fornix
The deepest point of the vestibule
No bicuspids/ no 3rd molars
Portion covered with cementum
A projection that extends off the back of the soft palate

2. How many roots/ cusps does the mandibular first molar have?
A triangular area located behind the last molar
Oval depression of temporal bone in condyloid process
Bifurcated/ 5 cusps
Canal or passage for fluid

3. What is the purpose of permanent teeth?
Cut - tear - and grind food
Innervates the orbicular oculi - the area around the eye - and the area around and behind the zygomatic arch
Molaris meaning millstone
Two

4. Gestational period
The crown of the tooth that is nearest the incisal edge near the anterior tooth
Folds of tissue to the the lingual veins
9 months (5 months ultrasound to tell sex)
Shed from the oral cavity

5. Alveolar Crest Fiber Group
Function to resist rotational forces and tilting
Found only in multi-rooted teeth and resists rotational forces
Enamel is thinner - pulp chamber is smaller -
The largest of the salivary glands which lie just below and in front of the ear

6. What are the only permeant teeth that are not succedaneous?
Follows the inside of the ramus and the body of the mandible
Substances between cells
The space between the unattached gingiva and the tooth
Molars

7. Maxillary Tuberosity
Aid in attaching the gingiva to the alveolar bone
Study of the structure and form of the teeth
The slightly raised line extending down the middle of the hard palate
A rounded area beyond the last posterior maxillary tooth

8. External Auditory Meatus
Opening for the ear
Ala of the nose - naso-labial groove - philtrum - vermilion border - vermilion zone - turbercle of the lip - labial commissures - labio-mental grooves
A faint line going from the ala of the nose to the corner of the mouth
Dissolve and reabsorb calcium salts of the bone matrix when stressed or damaged

9. Convects
Largest division of the trigeminal nerve
Curve outward
Sweet --tip of the tongue - salty--anterior sides of the tongue - sour--posterior sides of the tongue - bitter--center posterior of the tongue
Resists intrusive forces that try to push the tooth inwards

10. Submandibular Glands

11. Lingual Frenum
Incremental lines around the layers of the enamel matrix
A line of tissue that extends from the tongue to the floor of the mouth
Dentin found between the tubules
Resulting from an imperfect union where the lobes come together

12. Resonance
Full deep rich sound in nasal cavity
Bicuspids
Wearing away of the incisal or occlusal surfaces of the tooth
Supplies the mylohyoid muscle and the anterior belly of the digastric muscle

13. Torus
Pointed elongations of the pulp
Small yellowish glands on the labial mucosa
Bifurcated/ 5 cusps
Excess bone in the middle of the palate

14. Cleft Palate
Two weeks thru 8th week
Responsible for laying down the enamel matrix into place
Triangular space in the gingival direction when two adjacent teeth are in contact
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)

15. Interdental Septum
It intervates the buccal mucosa and buccal gingiva as well as the buccal of the mandibular molars
A bony projection that separates each socket
Hair-like projections anterior to the circumvallate papillae and covering the dorsal side of the tongue
Teeth will not erupt in proper position

16. What are the 4 taste senses and where are they located?
Constricts the nasopharyngeal passage and elevates the larynx
6 months/3years
Sweet --tip of the tongue - salty--anterior sides of the tongue - sour--posterior sides of the tongue - bitter--center posterior of the tongue
Allow flexibility during mastication - speech

17. Cortical Bone
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)
Radiates from the developmental groove
Compact bone plate of the facial and lingual surfaces
Resists intrusive forces that try to push the tooth inwards

18. Fissure
Compact bone plate of the facial and lingual surfaces
Resulting from an imperfect union where the lobes come together
Inside surface Which is towards the tongue - on anterior teeth
20

19. Tubercle of the Lip
A line of tissue that extends from the tongue to the floor of the mouth
Interdental ligament
Largest division of the trigeminal nerve
A small projection in the middle of the upper lip

20. Function of Sternocleidomastoid
Assists in elevating the chin
Quarters of the teeth
A shallow v-shaped depression located below the bottom of the nose and above the lips
Primitive mouth

21. Mental Artery
Extends from the medial corner of the eye to the nasal cavity
Exits the mandibular canal at the mental foramen and supplies the chin and lower lip
Glands the size of a walnut that lie on the inside of the mandible and empty saliva into the mouth thru the Wharton's duct
An enclosed area that matures into dentin - cementum and pulp

22. Exfoliated
A bat shaped bone which forms the anterior portion of the skull
The largest of three openings located in the posterior region of the hard palate
Exits the mandibular canal at the mental foramen and supplies the chin and lower lip
Shed from the oral cavity

23. Zygomatic nerve
Middle two teeth in the mouth
Mandibular central incisors
Innervates the orbicular oculi - the area around the eye - and the area around and behind the zygomatic arch
Joined at the midline and are often referred to as the median Palatine suture

24. What are the four major muscles of facial expression
Opening for the ear
The teeth located at the back of the mouth
Intervates the anterior maxillary sinus - gingiva - cuspids - laterals - and central incisors
Orbicularis oris - buccinator - mentalis - zygomatic major

25. Paranasal
Lining covers inside of the oral cavity
Of or pertaining to area surrounding naval cavity
Located behind the ramus of the mandible and branches into five arteries
A horseshoe shaped groove that follow the curve of the dental arch

26. Mandibular Foramen
Forms the remaining 2/3 of the hard and soft palate uvula
Respiratory system - digestive system and glandular organs
Located on the inside of the body of the ramus
Elevates the posterior portion of the tongue and narrows the fauces

27. Maxillary Nerve Branch
A sensory nerve that ennervates the nose - cheeks - palate - gingiva - maxillary teeth - maxillary sinus - tonsils and nasal pharynx
Small bony projections surrounding the lingual foramen
Band of fibrous tissue which attaches bone to bone
Substances between cells

28. What is the smallest tooth in dentition?
Cells that form dentin
The first predentin that is formed and matures within the tube
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
Mandibular central incisors

29. Pit
The development of different cells
Outside surface Which is towards the lips
Dividing point of a multi-rooted tooth
Place where the groove comes together or fissures cross

30. Dental Arteries
Supplies blood to the roots and periodontal ligaments of the molars and premolars
Substances between cells
Receives blood from the cranium - face and neck and drains into the brachiocphalic vein
Elevated are of enamel that forms the Mesial and distal borders

31. Mylohyoid Nerve Branch
Interdental ligament
The bone that separates the root on a tooth
Forms a large cavity above the roots of the maxillary molars
Supplies the mylohyoid muscle and the anterior belly of the digastric muscle

32. Concave
Where the ramus meets the body of the mandible on the outside border
Calcium salts are deposited into formed tooth
Clear fluid secreted by the salivary and mucous glands throughout the mouth
Indented

33. Xerostomia
Triferacated
Supplies blood to the roots and periodontal ligaments of the molars and premolars
Zygomatic - infraorbital - posterior superior alevolar - pterygopalatine
Excess dryness of the mouth

34. Morpho differentiation
9 weeks thru birth
Forms into the inner lining of the oral cavitiy and enamel of the teeth
Tissue fluid surrounding the cell membrane of the odontoblast
The development of different forms

35. How much saliva is produced daily?
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
Covers muscle tissue in the posterior portion of the palate
Origin - fixed point - insertion - movable point
1500 millimeters

36. Central Incisor
Shed from the oral cavity
Distends the ramus - enters the mandibular foramen and bifurcates around the first premolar tooth to form the incisive and the mental arteries
Middle two teeth in the mouth
Genioglossus - hyoglossus - styloglossus - palatoglossus

37. Mucogingival Junction
Full deep rich sound in nasal cavity
A line of demarcation between the attached gingiva and alveolar mucosa
Three cusps/ trifurcated
Oval depression of temporal bone in condyloid process

38. Lamina Dura
Moves the head backward and laterally
A line that represents the alveolus bone lining the socket
2 to 3 pints
Also known as meniscus it is a dense fibrous connective tissue that is thicker at the ends and attached to the condyle

39. Vermilion Zone
Extends from the medial corner of the eye to the nasal cavity
Place where the groove comes together or fissures cross
Portion of the lips that are red
Formed by the uniting of lobes during development of crown

40. Horizontal Fiber Group
Functions the same as the alveolar cfg; originate in alveolar bone
Origin - fixed point - insertion - movable point
Tributary of the facial vein which connects the facial vein to the pterygoid plexus of the veins
Occlusal surface of the posterior tooth

41. Lateral Incisor
No bicuspids/ no 3rd molars
Formed by the fibroblast cells and secures the tooth in the socket
Vestibule - vestibule fornix - labial mucosa - buccal mucosa - parotid papilla - Stenson's duct - linea alba - Fordyce's spots - alveolar mucosa - gingiva - labial frenum - buccal frenum
Second teeth next to central incisors

42. Mucosa
Lining covers inside of the oral cavity
Forms the remaining 2/3 of the hard and soft palate uvula
Exits the mandibular canal at the mental foramen and supplies the chin and lower lip
Union of two triangular ridges that produce a single ridge of elevation that cross the occlusal surface of posterior teeth

43. Gingiva
The slightly raised line extending down the middle of the hard palate
Pointed elongations of the pulp
Responsible for laying down the enamel matrix into place
A dense tissue covered with mucous membrane that can withstand chewing

44. Enamel Tufts
Band of fibrous tissue which attaches bone to bone
Creates the wall of the dentinal tubule
Small dark brushes
Secrete saliva to assist in process of digestion

45. What kind of root does the maxillary first molar have?
Drains the superficial veins of the face and neck into the subclavian vein
Triferacated
Small dark brushes
Separates the developing oral cavities from the nasal cavities

46. What are the four main functions of deciduous teeth?
Trigeminal nerve--because it ennervates the maxilla and the mandible
Tooth emerges from gum tissue and becomes visible
Mastication - aids in speech - influence facial structure - chewing surfaces
Excess bone formations under the tongue on the alvellar bone

47. Mesoderm
Developmental segment of a tooth
Middle line of the teeth
Folds of tissue that extend horizontally from the uvula to the base of the tongue
Forms into dentin - cementum and pulp of the teeth

48. Cleft Uvula
Primary and permanent
A projection that extends off the back of the soft palate
Mildest form of cleft palate
Substances between cells

49. Cusps
Pointed or rounded mounds on the crown of the tooth
Primary embryonic mesoderm layer that develops during the morpho differentiation period
Full deep rich sound in nasal cavity
H20 - mucin - organic salts and digestive enzymes

50. Facial Artery
The fixed attachment of a muscle
Surface away from the midline
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)
Contains six branches that supply blood to the pharynx muscles - soft palate tonsils - the posterior of the tongue - sub mandibular gland - muscles of the face - nasal septom - nose and the eyelids