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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. How many cusps/ roots do the 2/3rd mandibular molars have?
Zygomatic - infraorbital - posterior superior alevolar - pterygopalatine
4 cusps/ bifurcated
Where the ramus meets the body of the mandible on the outside border
Supplies blood to the brain and the eyes

2. Anterior Alveolar Nerve
Intervates the anterior maxillary sinus - gingiva - cuspids - laterals - and central incisors
6 months/3years
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)
A bony plate covered with keratinized tissue located in the anterior portion of the palate

3. Apical Fiber Group
A shallow v-shaped depression located below the bottom of the nose and above the lips
Dissolve and reabsorb calcium salts of the bone matrix when stressed or damaged
Resists forces that try to pull the tooth outward
Origin - fixed point - insertion - movable point

4. Function of Stylohyoid
The teeth located at the back of the mouth
Draws the hyoid bone superiorly and posteriorly and stabilizes it
Drains the facial structures beginning near the eye and descending toward the mandible
Trigeminal - facial - glossopharyngeal - hypoglossal

5. Incisal Edge
Depression forming a groove that sends from the middle of the buckle surface to the occlusal surface of the tooth
A flap of tissue on the on the buccal mucosa
Biting edge of the teeth
A concave area where two bones of the mandible are fused in the center of the mandible on the external surface

6. Horizontal Fiber Group
Lift the hyoid bone and assist in opening the mouth
Functions the same as the alveolar cfg; originate in alveolar bone
Vestibule - vestibule fornix - labial mucosa - buccal mucosa - parotid papilla - Stenson's duct - linea alba - Fordyce's spots - alveolar mucosa - gingiva - labial frenum - buccal frenum
Ligaments and muscles of mastication

7. Sulingual Folds
Begin at the caruncles on either side of the frenum and run backward to the base of the tongue
Raised lines of mucosal tissue found below the tongue - and below the top/ bottom of middle lip
Opening for the ear
(free gingiva) surrounds the teeth

8. Parotid glands
Cells that form dentin
The largest of the salivary glands which lie just below and in front of the ear
A projection that extends off the back of the soft palate
Orbicularis oris - buccinator - mentalis - zygomatic major

9. Sharpey's Fibers
Orbicularis oris - buccinator - mentalis - zygomatic major
It intervates the buccal mucosa and buccal gingiva as well as the buccal of the mandibular molars
Acts as anchors between the alveolar bone and the tooth
Narrow long enamel tuft

10. When does the maxillary second molar erupt?
A projection that extends off the back of the soft palate
12 years
Retracts or depresses the tongue
Drains the superficial veins of the face and neck into the subclavian vein

11. External Jugular Vein
Developmental segment of a tooth
Resist rotational forces and hold teeth in inter-proximal contact
Tributary of the facial vein which connects the facial vein to the pterygoid plexus of the veins
Drains the superficial veins of the face and neck into the subclavian vein

12. How many cusps does the second bicuspid have?
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
Exits the mandibular canal at the mental foramen and supplies the chin and lower lip
Biting edge of the teeth
Two

13. Pulpitis
The disc becomes displaced
When the tissue becomes inflamed
Largest division of the trigeminal nerve
Composed of mucosa and surrounds the necks of the teeth

14. Interdental Ligament Group
Resist rotational forces and hold teeth in inter-proximal contact
32
Cut - tear - and grind food
The connective tissue of the marginal gingiva

15. How many roots/ cusps does the mandibular first molar have?
Middle line of the teeth
Bifurcated/ 5 cusps
Ligaments and muscles of mastication
Extreme variations from the norm

16. What are the eight landmarks of the face?
Curve outward
Set of arches found farther in the back of the throat
Forms after the completion of the apical foramen
Ala of the nose - naso-labial groove - philtrum - vermilion border - vermilion zone - turbercle of the lip - labial commissures - labio-mental grooves

17. Convects
Curve outward
Begin at the caruncles on either side of the frenum and run backward to the base of the tongue
Tributary of the facial vein which connects the facial vein to the pterygoid plexus of the veins
The internal surface at the center of the mandible

18. Maxilla
Largest facial bone with two sections joined at the median suture
Portion of the lips that are red
Trigeminal - facial - glossopharyngeal - hypoglossal
The first predentin that is formed and matures within the tube

19. Attached Gingiva
A shallow v-shaped depression located below the bottom of the nose and above the lips
Origin - fixed point - insertion - movable point
Extends from the mucogingival junction to the gingival groove
A period of both primary teeth and permeant teeth are in the dentition

20. Uvula
When the dentin is exposed
A projection that extends off the back of the soft palate
Orbicularis oris - buccinator - mentalis - zygomatic major
A small projection in the middle of the upper lip

21. Function of Geneoglossus?
A duct that empties into the mouth thru the parotid papilla - Parotid gland goes with Stensen's duct
Retracts or depresses the tongue
Causes a thickening of the cementum around the apex
It intervates the buccal mucosa and buccal gingiva as well as the buccal of the mandibular molars

22. Incisal third
A line that represents the alveolus bone lining the socket
Temporal muscles - masseter muscles - internal pterygoid muscles - external pterygoid muscles
A horseshoe shaped bone lying at the base of the tongue--all the muscles of the tongue and the floor of the mouth attach to this bone
The crown of the tooth that is nearest the incisal edge near the anterior tooth

23. Enamel Dysplasia
Dividing point of a multi-rooted tooth
Extends from the medial corner of the eye to the nasal cavity
Incremental lines around the layers of the enamel matrix
When the surface of the teeth becomes grooved

24. Ala of the Nose
Enamel is thinner - pulp chamber is smaller -
The outer edge of the nostril
Excess dryness of the mouth
Pulverizing or chewing surface

25. Labial Mucosa
The inner surface of the lips
Outside surface Which is towards the lips
Trigeminal nerve--because it ennervates the maxilla and the mandible
Growth from the oral epithelium that gives rise to the tooth buds

26. Mesenchyme Tissue
Primary embryonic mesoderm layer that develops during the morpho differentiation period
Duct located on the parotid papilla
What divides the tongue in half and runs from the base to the tip of the tongue
Slight ridges on the cervical third of certain teeth that extend mesiodistally

27. What are the 3 branches of the pterygopalatine nerve branch?
Supportive fibers that anchor the tooth to the bone
A line of tissue that extends from the tongue to the floor of the mouth
Greater - lesser - naso palatine nerves
Drains the facial structures beginning near the eye and descending toward the mandible

28. Where is the palate located?
9 weeks thru birth
Inside of the maxillary teeth
Cells develop into different tissues
2 small raised folds of tissue where the lingual frenum attaches

29. What are the three muscles of the neck?
Forms the bulk of the tooth
The gingiva in the floor of the gingival sulcus that attaches to the enamel
Platysma - trapezius - sternocleidomastoid
Narrow long enamel tuft

30. What teeth do the deciduous (baby) tooth not include?
No bicuspids/ no 3rd molars
10 days
Oval structures that are located on the dorsal surface of the tongue
Platysma - trapezius - sternocleidomastoid

31. Supplemental Groove
Buccal - lingual - and inferior alveolar
Radiates from the developmental groove
The development of different tissues
A dense tissue covered with mucous membrane that can withstand chewing

32. Cyto differentiation
Scroll like bones outside the nasal cavaties
The development of different cells
When cells rapidly increase in number
A junction or center of veins that directly or indirectly drain a vast area

33. lst and second premolars
Wings of the sphenoid bone
Portion of the lips that are red
Scroll like bones outside the nasal cavaties
Teeth after cuspids

34. Saliva
Ligaments and muscles of mastication
Clear fluid secreted by the salivary and mucous glands throughout the mouth
Radiates from the developmental groove
A horseshoe shaped bone lying at the base of the tongue--all the muscles of the tongue and the floor of the mouth attach to this bone

35. Cusps
20
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
Pointed or rounded mounds on the crown of the tooth

36. Papilla
Of or pertaining to area surrounding naval cavity
Inside of the maxillary teeth
Retracts or depresses the tongue
Small raised projections where taste buds are located

37. Frenum
Drains the floor of the mouth
Raised lines of mucosal tissue found below the tongue - and below the top/ bottom of middle lip
A projection that extends off the back of the soft palate
32

38. Lingual Vein
Pulls the hyoid bone and the tongue anteriorly
Covering over the enamel that is left over from the epithelium ameloblasts
Found only in multi-rooted teeth and resists rotational forces
Drains the floor of the mouth

39. If Palate not fused
Bone that surrounds the root of the tooth
Elevated are of enamel that forms the Mesial and distal borders
Creates the wall of the dentinal tubule
Teeth will not erupt in proper position

40. Philtrum
Temporal muscles - masseter muscles - internal pterygoid muscles - external pterygoid muscles
Vertical groove on the midline of the upper lip
Origin of the tooth
Follows the inside of the ramus and the body of the mandible

41. Oblique Ridge
Elevated area fo enamel that extends obliquely across the occlusal surface of the tooth
A line that represents the alveolus bone lining the socket
20
Tissue covering the alveolar processes

42. Groove
Small linear depression
Pointed elongations of the pulp
Secrete saliva to assist in process of digestion
Drains the facial structures beginning near the eye and descending toward the mandible

43. Naso Palatine Nerve
When the surface of the teeth becomes grooved
Extends interiorly from the pterygopalatine nerve and exits thru the incisive foramen
The fixed attachment of a muscle
Platysma - trapezius - sternocleidomastoid

44. Muscle origine
To bulge of curve outward
Three cusps/ trifurcated
It intervates the buccal mucosa and buccal gingiva as well as the buccal of the mandibular molars
The fixed attachment of a muscle

45. Hard Palate
Resist rotational forces and hold teeth in inter-proximal contact
Origin of the tooth
Forms the bulk of the tooth
A bony plate covered with keratinized tissue located in the anterior portion of the palate

46. Morphology
Study of the structure and form of the teeth
Quarters of the teeth
Ligaments and muscles of mastication
Cells develop into different tissues

47. What is origin and What is insertion?
Oval depression of temporal bone in condyloid process
Where the proximal sides of two teeth come together and touch
A bat shaped bone which forms the anterior portion of the skull
Origin - fixed point - insertion - movable point

48. Philtrum
Portion covered with cementum
A shallow v-shaped depression located below the bottom of the nose and above the lips
Trigeminal nerve--because it ennervates the maxilla and the mandible
Band of fibrous tissue which attaches muscle to bone

49. Glenoid Fossa
Oval depression of temporal bone in condyloid process
Papillae that give the tongue the strawberry effect
Study of prenatal growth and the developing process of an individual
Located on the inside of the body of the ramus

50. Mental Protuberance
Composed of mucosa and surrounds the necks of the teeth
To dissolve
Study of prenatal growth and the developing process of an individual
The tip of the chin