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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. Buccal Mucosa
Hair-like projections anterior to the circumvallate papillae and covering the dorsal side of the tongue
Peg shaped crown with a smooth surface
The inner surface of the cheeks
Substances between cells

2. What are the 12 landmarks of the oral cavity?

3. Cortical Bone
Compact bone plate of the facial and lingual surfaces
Palatoglossus - palatopharyngeal
The portion of the tooth that meets the gingiva
Enamel is thinner - pulp chamber is smaller -

4. What is the longest tooth in the mandibular arch?
Scroll like bones outside the nasal cavaties
The mandibular first premolar
The bone that separates the root on a tooth
Portion of the root seen in the oral cavity

5. Maxillary Tuberosity
Folds of tissue that extend horizontally from the uvula to the base of the tongue
A rounded area beyond the last posterior maxillary tooth
The disc becomes displaced
Small linear depression

6. Morpho Differentiation
The moveable attachment of the muscle
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
Forming organ takes shape and resembles the shape of a bell
A bony projection that separates each socket

7. Cusps
Digstric - Mylohyoid - stylohyoid - geniohyoid
Assist in the movement and functioning of the tongue
Pointed or rounded mounds on the crown of the tooth
The inner surface of the lips

8. Dental Arteries
Supplies blood to the roots and periodontal ligaments of the molars and premolars
Inside surface Which is towards the tongue - on anterior teeth
When cells rapidly increase in number
Mastication - aids in speech - influence facial structure - chewing surfaces

9. Enamel Tufts
Natural teeth in position
Small dark brushes
A concave area where two bones of the mandible are fused in the center of the mandible on the external surface
Exits the mandibular canal at the mental foramen and supplies the chin and lower lip

10. What are the extrinsic muscles of the tongue responsible for?
Assist in the movement and functioning of the tongue
Tissue covering the alveolar processes
Aid in attaching the gingiva to the alveolar bone
Follows the inside of the ramus and the body of the mandible

11. Lingual Nerve Branch
Intervates the floor of the mouth the ventral side of the tongue taste buds on the anterior two thirds of the tongue and the lingual gingiva
Maxillary third molar
Fifth cusp located on the mesial surface lingual surface of maxillary first molars
A bat shaped bone which forms the anterior portion of the skull

12. Endoderm
Respiratory system - digestive system and glandular organs
Primary embryonic mesoderm layer that develops during the morpho differentiation period
32
The largest of the salivary glands which lie just below and in front of the ear

13. Odontogenesis
Origin of the tooth
A concave area where two bones of the mandible are fused in the center of the mandible on the external surface
4/5 cusps/ 3 roots
Resulting from an imperfect union where the lobes come together

14. Mylohyoid Artery
Inside of the maxillary teeth
The smallest of the salivary glands located on the floor of the mouth which empty into the mouth thru either the ducts of Rivinus or Bartholin
Small dark brushes
Branches off the inferior alveolar artery before intering the mandibular canal

15. Quadrants
Quarters of the teeth
Portion covered with cementum
Drains the Pterygoid plexus of the veins
Divides the crown and the root

16. Function of Sternocleidomastoid
Natural teeth in position
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
Tooth emerges from gum tissue and becomes visible
Assists in elevating the chin

17. How is the TMJ supported and what controls their movement?
To dissolve
Origin - fixed point - insertion - movable point
Ligaments and muscles of mastication
Constricts the nasopharyngeal passage and elevates the larynx

18. Morpho differentiation
32
Forms into the inner lining of the oral cavitiy and enamel of the teeth
Interdental ligament
The development of different forms

19. Embryo
Vertical groove on the midline of the upper lip
Union of two triangular ridges that produce a single ridge of elevation that cross the occlusal surface of posterior teeth
Two weeks thru 8th week
A period of both primary teeth and permeant teeth are in the dentition

20. Alveolar Crest
Surface towards the midline
A raised white line that runs parallel to where the teeth meet on the buccal mucosa
The line of demarcation between the attached gingiva and the marginal gingiva
Two cortical bone plates that come together between each tooth

21. Maxillary Sinus
Forms a large cavity above the roots of the maxillary molars
Begin at the caruncles on either side of the frenum and run backward to the base of the tongue
Joined at the midline and are often referred to as the median Palatine suture
Maxillary first molar

22. Exfoliated
Study of prenatal growth and the developing process of an individual
Shed from the oral cavity
Full deep rich sound in nasal cavity
Receives blood from the cranium - face and neck and drains into the brachiocphalic vein

23. Uvula
Trigeminal nerve--because it ennervates the maxilla and the mandible
A projection that extends off the back of the soft palate
The deepest point of the vestibule
Depression forming a groove that sends from the middle of the buckle surface to the occlusal surface of the tooth

24. If a patient receives toxic agents - how long does it take for their sense of taste to return?
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
10 days
Origin of the tooth
Growth from the oral epithelium that gives rise to the tooth buds

25. Circumpulpal Dentin
The layer of dentin that surrounds the pulp
The development of different forms
Resulting from an imperfect union where the lobes come together
Hair-like projections anterior to the circumvallate papillae and covering the dorsal side of the tongue

26. Anterior Tonsillar Pillar
Folds of tissue that extend horizontally from the uvula to the base of the tongue
Place where the groove comes together or fissures cross
Forming organ takes shape and resembles the shape of a bell
Supplies blood to the roots and periodontal ligaments of the molars and premolars

27. Torus
Cells that form cementum
A flap of tissue on the on the buccal mucosa
Arteries supplying blood to most of the head and the neck
Excess bone in the middle of the palate

28. Infraorbital Foramen
Bifurcated/ 5 cusps
Opening in the mouth below the orbit on the maxillary bone
Indented
The deepest point of the vestibule

29. Periodontal Ligaments
Mucosa that covers the alveolar bone
Occlusal surface of the posterior tooth
Branches off the inferior alveolar artery before intering the mandibular canal
Formed by the fibroblast cells and secures the tooth in the socket

30. Paranasal
Tooth emerges from gum tissue and becomes visible
Raised lines of mucosal tissue found below the tongue - and below the top/ bottom of middle lip
Of or pertaining to area surrounding naval cavity
Drains the superficial veins of the face and neck into the subclavian vein

31. Clinical root
Portion of the root seen in the oral cavity
Origin of the tooth
Two weeks thru 8th week
Assist in the movement and functioning of the tongue

32. Oblique Fiber Group
A duct that empties into the mouth thru the parotid papilla - Parotid gland goes with Stensen's duct
Resists intrusive forces that try to push the tooth inwards
Circle and tighten the gingival margin around the neck of the tooth
Triangular space in the gingival direction when two adjacent teeth are in contact

33. Triangular Ridge
Bi-cuspids
Follows the inside of the ramus and the body of the mandible
Descends from the cusp and widens as it runs down to the midline area of the occlusal surface
Dissolve and reabsorb calcium salts of the bone matrix when stressed or damaged

34. Enamel Lamellae
Largest of the branches of the external carotid artery; supplies facial structure
A faint line going from the ala of the nose to the corner of the mouth
Assists in elevating the chin
Narrow long enamel tuft

35. Dentoperiosteal Fiber Groups
Incremental line indicating trauma of birth
Mastication - aids in speech - influence facial structure - chewing surfaces
Functions the same as the alveolar cfg; originate in alveolar bone
Supportive fibers that anchor the tooth to the bone

36. Middle Superior Alveolar Nerve
Portion of the lips where the skin meets the vermilion zone
Supplies the lateral wall of the maxillary sinus - gingiva - mesial buccal root of the first molar - and the roots of the bicuspids
Small linear depression
Formed by the fibroblast cells and secures the tooth in the socket

37. Maxillary Arch
A raised white line that runs parallel to where the teeth meet on the buccal mucosa
Drains the superficial veins of the face and neck into the subclavian vein
Upper arch of the teeth
Corners of the mouth

38. Common Carotid
Forms into dentin - cementum and pulp of the teeth
Arteries supplying blood to most of the head and the neck
Portion of the root seen in the oral cavity
Cells that form cementum

39. Mesoderm
Where the proximal sides of two teeth come together and touch
Inside surface Which is towards the tongue - on anterior teeth
Forms into dentin - cementum and pulp of the teeth
Mastication - aids in speech - influence facial structure - chewing surfaces

40. Xygote
When cells rapidly increase in number
Surface away from the midline
Drains the floor of the mouth
Branches off the inferior alveolar artery before intering the mandibular canal

41. Agenesis
Molars
Vestibule - vestibule fornix - labial mucosa - buccal mucosa - parotid papilla - Stenson's duct - linea alba - Fordyce's spots - alveolar mucosa - gingiva - labial frenum - buccal frenum
Anterior to the ethmoid bone and part of the orbit (corners of the eye)
Occurs in unusual ways and distorted crowns may appear

42. What are the 4 muscles of the floor of the mouth?
Small yellowish glands on the labial mucosa
Surface towards the midline
Digstric - Mylohyoid - stylohyoid - geniohyoid
Allow flexibility during mastication - speech

43. How many cusps does the second bicuspid have?
Ala of the nose - naso-labial groove - philtrum - vermilion border - vermilion zone - turbercle of the lip - labial commissures - labio-mental grooves
The largest of the salivary glands which lie just below and in front of the ear
Two
Mildest form of cleft palate

44. Articular Disc
Elevated area fo enamel that extends obliquely across the occlusal surface of the tooth
Also known as meniscus it is a dense fibrous connective tissue that is thicker at the ends and attached to the condyle
Pulls the hyoid bone and the tongue anteriorly
4th week

45. Convex
Causes a thickening of the cementum around the apex
Primitive mouth
Outside surface Which is towards the cheek - on posterior teeth
To bulge of curve outward

46. Midline
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
Middle line of the teeth
Biting edge of the teeth
No bicuspids/ no 3rd molars

47. External Oblique Ridge
Week 11
A raised white line that runs parallel to where the teeth meet on the buccal mucosa
A line that represents the alveolus bone lining the socket
Follows the length of the body of the mandible past the last tooth and up to the ramus

48. What is the maxillary cuspid known as?
A projection that extends off the back of the soft palate
The cornerstone of the mouth
Retracts or depresses the tongue
Excess dryness of the mouth

49. Buckle groove
Elevates the posterior portion of the tongue and narrows the fauces
Depression forming a groove that sends from the middle of the buckle surface to the occlusal surface of the tooth
Curve outward
A flap of tissue on the on the buccal mucosa

50. Xerostomia
Surface away from the midline
Calcium salts are deposited into formed tooth
Excess dryness of the mouth
Week 12