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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Free Gingiva
9 months (5 months ultrasound to tell sex)
Mastication - aids in speech - influence facial structure - chewing surfaces
The portion of the tooth that meets the gingiva
Temporal muscles - masseter muscles - internal pterygoid muscles - external pterygoid muscles

2. Sublingual Caruncles
Divides the crown and the root
Where the ectoderm layer matures into the enamel
2 small raised folds of tissue where the lingual frenum attaches
Elevated are of enamel that forms the Mesial and distal borders

3. External Carotid Artery
A raised area of tissue laying behind the maxillary central incisors on the hard palate
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
Resist rotational forces and hold teeth in inter-proximal contact
Supplies blood to the face and oral cavity

4. How many teeth are in the permanent set of teeth?
32
Forms a large cavity above the roots of the maxillary molars
Calcium salts are deposited into formed tooth
Platysma - trapezius - sternocleidomastoid

5. What are the four major muscles of facial expression
A raised area of tissue laying behind the maxillary central incisors on the hard palate
Forms a large cavity above the roots of the maxillary molars
Orbicularis oris - buccinator - mentalis - zygomatic major
Formed by the fibroblast cells and secures the tooth in the socket

6. Taste Buds
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
Follows the inside of the ramus and the body of the mandible
Oval structures that are located on the dorsal surface of the tongue
Temporal muscles - masseter muscles - internal pterygoid muscles - external pterygoid muscles

7. Facial Artery
The tip of the chin
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
Bony projection found on the bottom border of the temporal bone
It intervates the buccal mucosa and buccal gingiva as well as the buccal of the mandibular molars

8. Mamelons
Conception thru the first two weeks
Supplies the gingival - maxillary sinus - cheeks - and maxillary molars with the exception of the mesial buccal root of the first molar
Three bulges on the incisal edge
A bat shaped bone which forms the anterior portion of the skull

9. Mesenchyme Tissue
Primary embryonic mesoderm layer that develops during the morpho differentiation period
Middle line of the teeth
Study of the structure and form of the teeth
Small curved lines that run parellel to the CEJ

10. Greater Palatine Foramen
The largest of three openings located in the posterior region of the hard palate
The mandibular molars
Synovial fluid
Full deep rich sound in nasal cavity

11. Intercellular Substances
Substances between cells
Forms after the completion of the apical foramen
Small grooves noted on some teeth
Where the ectoderm layer matures into the enamel

12. Tome's process
H20 - mucin - organic salts and digestive enzymes
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)
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
Responsible for laying down the enamel matrix into place

13. Mesial
Surface towards the midline
Where the proximal sides of two teeth come together and touch
Anterior to the ethmoid bone and part of the orbit (corners of the eye)
A bony projection that separates each socket

14. Palatine Rugae
Respiratory system - digestive system and glandular organs
Acts as anchors between the alveolar bone and the tooth
Pointed or rounded mounds on the crown of the tooth
The ridges that run horizontally across the hard palate behind the incisive papilla

15. Purpose of premolars
Moves the head backward and laterally
Used to pulverize food
9 months (5 months ultrasound to tell sex)
Appears to be loosely attached - covering the alveolar bone.

16. Odontal Fiber Groups
Allow flexibility during mastication - speech
Conception thru the first two weeks
The slightly raised line extending down the middle of the hard palate
Bluish veins that run the length of the tongue

17. Gestational period
9 months (5 months ultrasound to tell sex)
Two
To bulge of curve outward
Formed by the fibroblast cells and secures the tooth in the socket

18. Sharpey's Fibers
6 months/3years
Acts as anchors between the alveolar bone and the tooth
Folds of tissue to the the lingual veins
The development of different cells

19. Odontoblast
Palatoglossus - palatopharyngeal
A flap of tissue on the on the buccal mucosa
Cells that form dentin
Third tooth from the midline

20. Tubercle of the Lip
Vestibule - vestibule fornix - labial mucosa - buccal mucosa - parotid papilla - Stenson's duct - linea alba - Fordyce's spots - alveolar mucosa - gingiva - labial frenum - buccal frenum
Portion covered with cementum
9 weeks thru birth
A small projection in the middle of the upper lip

21. Salivary Glands
Cells develop into different tissues
Disk that acts like a cushion between the temporal bone and the condyloid process
Fleshy elevation under the tongue
Secrete saliva to assist in process of digestion

22. Gingival Sulcus
The space between the unattached gingiva and the tooth
Raised vertical folds of tissue on the lateral border of the tongue
Drains the Pterygoid plexus of the veins
Oval depression of temporal bone in condyloid process

23. Oblique Fiber Group
Portions of the tooth structure that support hard and soft dental tissues and the alveolar bone
Portion of the lips that are red
Extreme variations from the norm
Resists intrusive forces that try to push the tooth inwards

24. Denticion
Natural teeth in position
The tip of the chin
Follows the length of the body of the mandible past the last tooth and up to the ramus
Third tooth from the midline

25. Alveolar Crest
Follows the inside of the ramus and the body of the mandible
An enclosed area that matures into dentin - cementum and pulp
Two cortical bone plates that come together between each tooth
Portion of the lips where the skin meets the vermilion zone

26. Circular Ligament Fiber Groups
Circle and tighten the gingival margin around the neck of the tooth
Natural teeth in position
Chewing and swallowing food
Primary embryonic mesoderm layer that develops during the morpho differentiation period

27. Maxillary Artery
Short tubules that seem to crossover to the enamel
Largest of the branches of the external carotid artery; supplies facial structure
Mildest form of cleft palate
10 days

28. Maxillary Tuberosity
Compact bone plate of the facial and lingual surfaces
A rounded area beyond the last posterior maxillary tooth
Trigeminal - facial - glossopharyngeal - hypoglossal
Begin at the caruncles on either side of the frenum and run backward to the base of the tongue

29. What are the 4 pairs of muscles of mastication!
Initiation of the tooth begins
Week 11
Dividing point of a multi-rooted tooth
Temporal muscles - masseter muscles - internal pterygoid muscles - external pterygoid muscles

30. Ectoderm
Peg shaped crown with a smooth surface
Forms into the inner lining of the oral cavitiy and enamel of the teeth
Bicuspids
Forms after the completion of the apical foramen

31. Intertubular Dentin
Corners of the mouth
Dentin found between the tubules
Ala of the nose - naso-labial groove - philtrum - vermilion border - vermilion zone - turbercle of the lip - labial commissures - labio-mental grooves
9 weeks thru birth

32. Gingiva
Maxillary first molar
Composed of mucosa and surrounds the necks of the teeth
The groove below the lower lips that separates the lips from the chin
More common in girls--the failure of the palatal shelves to fuse with the primary palate (1 in 2500 births)

33. Resonance
The slightly raised line extending down the middle of the hard palate
Bifurcated/ 5 cusps
Portion covered with cementum
Full deep rich sound in nasal cavity

34. Interdental Septum
Opening in the mouth below the orbit on the maxillary bone
Causes a thickening of the cementum around the apex
Oval depression of temporal bone in condyloid process
A bony projection that separates each socket

35. Gingival Hyperplasia
Tubules that pass through the entire surface of the dentin
4 cusps/ bifurcated
Natural teeth in position
An overgrowth of the gingival tissue

36. Mylohyoid Nerve Branch
Stained growth rings in dentin
Band of fibrous tissue which attaches muscle to bone
Supplies the mylohyoid muscle and the anterior belly of the digastric muscle
Place where the groove comes together or fissures cross

37. Groove
Lining covers inside of the oral cavity
A shallow v-shaped depression located below the bottom of the nose and above the lips
Small linear depression
Buccal - lingual - and inferior alveolar

38. If Palate not fused
Constricts the nasopharyngeal passage and elevates the larynx
Teeth will not erupt in proper position
Where the proximal sides of two teeth come together and touch
A small projection in the middle of the upper lip

39. Enamel Dysplasia
Excess bone in the middle of the palate
Incremental lines around the layers of the enamel matrix
A small projection in the middle of the upper lip
When the surface of the teeth becomes grooved

40. What are the characteristics of permanent teeth?
Composed of mucosa and surrounds the necks of the teeth
Corners of the mouth
Enamel is thinner - pulp chamber is smaller -
The teeth located at the back of the mouth

41. Sublingual Sulcus
A period of both primary teeth and permeant teeth are in the dentition
A horseshoe shaped groove that follow the curve of the dental arch
Resulting from an imperfect union where the lobes come together
The inner surface of the lips

42. Symphysis
A concave area where two bones of the mandible are fused in the center of the mandible on the external surface
Orbicularis oris - buccinator - mentalis - zygomatic major
Innervates the orbicular oculi - the area around the eye - and the area around and behind the zygomatic arch
A bony plate covered with keratinized tissue located in the anterior portion of the palate

43. lst and second premolars
The cornerstone of the mouth
The largest of three openings located in the posterior region of the hard palate
The development of different cells
Teeth after cuspids

44. Styloid Process
Sharp projection on the under surface of the temporal bone
Where the ramus meets the body of the mandible on the outside border
Dividing point of a multi-rooted tooth
Respiratory system - digestive system and glandular organs

45. Cementoblast
Cells that form cementum
Week 12
Separation of the upper lip ( 1 of 1000 live births)
Inside surface Which is towards the tongue - on anterior teeth

46. Posterior Tonsillar Pillar
The study of the microscopic structure and functions of tissues
Set of arches found farther in the back of the throat
The development of different tissues
Responsible for laying down the enamel matrix into place

47. Incisive Papilla
Primary and permanent
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
A raised area of tissue laying behind the maxillary central incisors on the hard palate
Supplies blood to the roots and periodontal ligaments of the molars and premolars

48. Cingulum
Set of arches found farther in the back of the throat
Tooth emerges from gum tissue and becomes visible
Convex area on the lingual surface near gingiva
Bicuspids

49. Fordyce's Spots
The deepest point of the vestibule
Orbicularis oris - buccinator - mentalis - zygomatic major
Ligaments and muscles of mastication
Small yellowish glands on the labial mucosa

50. Mastoid process
Bluish veins that run the length of the tongue
Bone that surrounds the root of the tooth
Cut - tear - and grind food
Bony projection found on the bottom border of the temporal bone