Year4DD/Orthodontic I/Dr.Chum Mony/
Orthodontic Knowledge Challenge
Test your orthodontic knowledge with our comprehensive quiz designed for dental students and professionals alike. This quiz covers essential topics related to primary and permanent dentition, dental arch dimensions, and growth factors in orthodontics.
Prepare for success and enhance your understanding of orthodontal principles with questions that include:
- Distal step relationships
- Maxillary permanent teeth eruption sequences
- Craniofacial growth theories
1. A distal step in the primary dentition will most likely to reflect a Class ___ occlusion in the permanent dentition.?
I. Ovoid arch form
II. deep overjet and overbite
III. Straight terminal plane
IV. Primate spaces
Class III
Class II
Class I
None of the choices
2. Which of the following are normal signs of primary dentition?
I. Ovoid arch form
II. deep overjet and overbite
III. Straight terminal plane
IV. Primate spaces
I, II, III and IV
II, III and IV
I, III and IV
I, II and IV
3. It is the difference in size between the primary teeth and their permanent successor in the posterior segment:?
Posterior liability
Nance Leeway space
Posterior size discrepancy
Late mesial shift
4. The most important dental arch dimension is?
Arch width
Arch perimeter
Arch length
Arch width and arch length
5. At what stage in Nolla’s classification does a permanent tooth start to erupt?
Stage 7
Stage 6
Stage 5
Stage 8
Stage 4
6. From the flush terminal plane relationship of molars in the primary dentition, the permanent first molar relationship in the permanent dentition can become the following in the transition period, except:?
Class I
Class III
Class II
End to end / cusp to cusp
E. None of the choices
7. Six keys to normal occlusion include the following?
I. No rotations
II. no spaces in between teeth
III. Upright anterior teeth
I and II
I and III
II and III
I, II and III
8. Spaces between the primary anteriors:?
Interdental space
Primate space
Nance leeway space
Interdental space and primate space
9. Primate space is found between the:?
Maxillary canine and first molar
Mandibular primary canine and lateral incisor
Maxillary canine and lateral incisors
None of the above
10. Sequence of eruption of maxillary permanent teeth.?
1-6-2-4-5-3-7
6-1-2-4-5-3-7
6-1-2-3-4-5-7
None of the above.
11. Permanent teeth that erupt posterior to the primary teeth?
Successional teeth
Accessional teeth
Supernumerary teeth
Successional teeth and accessional teeth
12. Class I permanent molar relationship can be achieved through the following, except?
Late mesial shift after the loss of second primary molar
Greater forward growth of the mandible than the maxilla
Combination of both
None of the above.
13. An inherent disposition of most teeth to drift mesially even before they are in occlusion:?
Mesial drifting tendency
Anterior component of force
Physiologic movement of teeth
Mesial drifting tendency and anterior component of force
14. Maxillary alveolar process growth is:?
Converging
Parallel
Diverging
Converging and parallel
15. Which of the following is not a characteristic of a mature swallow?
Active contractions of the muscles of the lips
Tongue tip is placed against alveolar process behind the upper incisors
Teeth are together during swallowing
All are corrects
16. These are six soft spots present between the bones of the skull roof.?
Sutures
Synchondroses
Fontanelles
Cartilages
17. Growth by proliferation of cartilage cells and the conversion of the older cartilage into new bone cell is?
Sutural
Endosteal
Endochondral
Intramembranous
18. Activity at the intra-occipital synchondrosis closes at?
After birth
At 20th year
Between the 3rd and 5th year
Between 5-25 years of age
None of the above
19. The following are distinctive structural features related to cartilage of the cranial base, except:?
Pressure- tolerant
Grows interstitially and appositionally
Matrix is non-vascular
Grows appositionally
20. What is the chief factor in the formation of the alveolar process?
Normal process of growth
Eruption of teeth
Lengthening of the condyle
Overall growth of the maxilla and mandible
21. Horizontal lengthening of the maxilla occurs in?
Anterior direction
Posterior direction
Superior direction
Inferior direction
22. The greatest increase in cranial growth occurs during?
0-5 years
5-10 years
10-20 years after birth
1-6 years
23. The cranial vault increases rapidly in size the first few years postnatally. This growth is typical of which of the following types of tissue?
Neural
Dental
Lymphoid
Somatic
Genital
24. Space for eruption of permanent mandibular molars is created by:?
Apposition at the anterior border of the ramus
Apposition at the alveolar process
Resorption at the anterior border of the ramus
Resorption at the posterior border of the ramus
25. Displacement of the mandible due to its growth at the condyle and posterior border of the ramus is?
Primary
Secondary
Tertiary
Cortical drift
26. Chin cup is used to intercept a?
Class I type 3
Class II
Class III
Developing Class III
27. A direct growth movement that is produced by deposition on one side of the orbital plate with resorption on the opposite side is?
Displacement
Translation
Cortical drift
Remodeling
28. The theory which states that the growth of the craniofacial bones is caused by the soft tissues adjacent to them.?
Functional matrix
Cartilaginous growth theory
Sutural Dominance theory
Limborgh’s theory
29. The “V” principle of growth is best illustrated by the?
Nasal septum
Posterior border of the mandibular ramus
Mandibular symphysis
Intersphenoidal synchondrosis
30. At birth, which of the following structures is nearest the size it will eventually attain in adulthood?
Cranium
Maxilla
Mandible
Nasal septum
31. The main growth site of the mandible which is responsible for its increase ion height?
Condyle
Gonial angle
Symphysis
Posterior border of the ramus
Inferior border of the body
32. The sequence of completion of facial growth by planes of space is?
Depth, width, height
Height, depth, width
Width, depth, height
Depth, height, width
Width, height, depth
33. The halves of the mandible fused at age?
Birth
One month postnatally
One year of age
Two years
34. The following are oblique and parallel sutures of the maxilla, except:?
Frontomaxillary
Pterygo-palatine
Zygomatico-maxillary
Zygomatico-temporal
Sphenoethmoidal
35. The major mechanism for growth of the cranial case is the:?
Expansion of the cartilage cells
Interstitial growth of bone
Apposition of new bone at the synchondroses
Apposition of new bone at the sutures
36. The vertical lengthening of the maxillary complex is brought about by a composite of factors, except:?
Deposition of bone on the oral side of the palate with compensating resopriton on the entire oral side
Deposition on the posterior facing cortical surface of the maxillary Tuberosity
Deposition on the various sutures where it contacts the other bones above it
All are corrects
37. Growth dimensions in the maxilla which are are sex-linked at puberty.?
Width and depth
Height and width
Height and depth
Width
38. The profile of a normal neonate is?
Straight
Convex
Concave
All are corrects
39. Which of the following factors will not increase maxillary width?
Growth of the palate following “V” principle
Deposition at the fronto-maxillary suture
Deposition at the lateral walls
Deposition at the median palatine sutre
40. Dental age which is characterized by the eruption of all succedaneous teeth with the 2nd permanent molars rearing eruption?
Age 6
Age 8
Age 10
Age 12
Age 14
41. The principal growth site of the cranial base believed to be responsible for its anteroposterior growth is?
Spheno-occipital
Spheno-ethmoidal
Intersphenoidal
Intraoccipita
42. Which of the following is not a source of extra space for the resolution of permanent incisor crowding in the lower arch?
Increase in intercanine width
Labial positioning of the permanent incisors
Distal movement of the canines into the primate space
Deposition of bone at the posterior border of the ramus
43. This can detect the muscle activity and the effect of abnormal muscle function on the dentition.?
Hand and wrist x-ray
Electromyographic exam
BMR
Biostatistics
None of the above
44. It is an excellent aid in appraising facial balance, facial type and harmony of external feature.?
Photos
Radiograph
Study cats
Cephalometrics
None of the above.
45. This appraises the soft tissue adaptation to the bony profile, lip size, shape and posture of soft tissue thickness over the symphisis.?
Profile
Denture
Skeletal anaysis
Profile and denture
46. The systematic analysis of the child’s dentition and supporting denture bases as they relate to the facial bones and cranial base.?
Profile
Denture
Skeletal analysis
All are corrects
47. Methods in measuring the apical base relationship:?
I. SNA
I. SNA
II. SNB
III. ANB
IV. FMA
I, II, III and IV
I, II and III
I, III and IV
II, III and IV
III and IV only
48. Which among the following are vertical planes?
I. facial
II. Y axis
III. ANB
IV. FMA
I, II, III and IV
I, II and III
II, III and IV
II and IV
III and IV
49. Bone ossification can be detected with the use of:?
Hand and wrist
Electromyographic exam
BMR
Biostatistics
None of the above
50. Which among the following are anatomic landmarks?
I. Na
II. Pog
III. Go
I, II, III and IV
I, II and III
II, III and IV
II and IV
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