MCQ C

1. Orthodontic is that specific area of dental practice that has as its responsibility the study and supervision of the growth and development of the ( 1 ) and its related( 2 ) from birth to dental maturity, including all preventive and corrective procedures of dental irregularities requiring the repositioning of teeth by functional or mechanical means to establish normal occlusion and pleasing facial contours (

2. Orthodontics guides the developing dentition to attain optimum occlusal relations in ( ) harmony with other facial and cranial structures (

3. Optimum occlusion must have following features(

4. Buccinator mechanism consists of ----

5. Position and form will be influenced by two forces, from outside ( 1. ) Inside ( 2. )(

6. What will break the balance between tongue and lip/ cheek (

7. Which one will cause an open bite?(

8. Mouth breathing will cause following findings(

9. Airway obstruction which will induce mouth breathing will be caused by-------(

10. What are the causative factors? 1. Micro rhino dysplasia 2. Enlargement of adenoid tissue 3. Allergy 4. Nasal septum deviation 5. Unconscious habit(

11. What are the effects of dental arch and jaws in mouth breathing? 1. Narrow intercanine width in maxilla 2. Lower tongue position 3. Downward and backward rotation of mandible 4. C III molar relationship 5. Short face (

12. In case mouth breathing, what part we should check? 1. Nares 2. Nasal mucosa 3. Nasal septum 4. Adenoid 5. Tonsil(

13. What are not functions of Stomatognathic function?(

14. Growth is ( 1 ) changes and Development is ( 2 ) changes(

15. Three types of growth at cellular level(

16. There are two types of growth, interstitial growth and appositional growth. Which one is correct?(

17. Dr. Scammon ‘s growth curve shows 1. Differential growth rate in different tissue at different time/ 2. Brain and head will reach 95% of adults size by the age 7-8 /3. Lymphoid tissue exceeds the size of adults by the age of 11-12, reaching 190% of the adults size./4. Reproductive organ grows very slowly in early age, after 14 it grow fast.(

18. What option is the most popular one for the research of craniofacial growth?(

19. What method of gathering growth date is most precise and valuable data?(

20. How can we use the normal growth data? 1. Can Find out the difference between individual and normal data / 2. Can explain the abnormality of patient from Normal growth data /3. Can Find out changes of growth pattern /4. Can Refer to Growth modification /5. Use as the foundation for treatment planning(

21. Head will be ( 1 ) of whole body length at birth, but it will become ( 2 ) at adult(

22. Bone has the following characteristics, which one is incorrect?(

23. Cartilage has the following characteristics, which one is incorrect?(

24. Endochondral ossification occurs in hyaline cartilage prototype models of the future bone,. Which one is not from endochondral bone formation?(

25. Which one is Intramembranous bone ? 1. Frontal bone 2. Mandible 3. Maxilla 4. Cranial base 5. Basioccipital bone(

26. Which one is incorrect for the characteristics of Intramembranous bone?(

27. Histological differences between long bone and condylar cartilage? Incorrect one(

28. How many bones are there in skull at birth?(

29. How many bones are there in Skull after completion of ossification?(

30. Basic mechanism of growth movement of cranio-facial bone is caused by (1) and (2)(

31. Bone grow by adding new bone tissue on one side of bony cortex that is new bone deposition and taking it away from the other side that is resorption. It produces a direct growth movement of any given area of a bone. We call it______.(

32. When a bone grows, it has to adapt to a new position and function. So that the bone has to alter itself locally in progressive and continuous manner with growth. Then a bone can increase in size by neither change of its initial shape nor its own functional responsibility. This process is called ________________________(

33. Growth of Cranial vault is carried out by Sutural and ____________ Growth(

34. What is the factors to promote the growth of cranial vault?(

35. Correct ?(

36. Which statement is incorrect for the growth of braincase?(

37.Which one is not in the cranial base?(

38. When will Spheno-Occipital synchondrosis stop growth?(

39. What Synchondrosis will disappear at birth?(

40. Spheno-Occipital Synchondrosis is the most important one in cranial base. Correct one?(

41. The followings are the relationship between head type and occlusion, the incorrect one is?(

42. The followings are the growth of cranial base, which one is right? 1. Endochondral bone formation / 2. It can not be controlled by external force / 3. Growth of SO synchondrosis affect on the maxillomandibular relationship / 4. Cranial base angle cannot effect on the position of TMJ / 5. All of above(

43 What bones does the maxilla articulate with?(

44. The following are the growth of maxilla. Which one is right? 1. Intramembranous bone formation / 2. Bone deposition at the maxillary tuberosity and alveolar process / 3. Sutural growth / 4. Bone resorption at the roof of oral cavity / 5. Bone deposition at the floor of nasal cavity(

45 .The following is the characteristics of condylar cartilage. Which one is incorrect?(

46. Which one is incorrect for the definition of term of rotational growth of mandible?(

47. There are two patterns of mandibular growth, clockwise and counterclockwise. Pattern. Which one is correct?(

48.Which one is the most reliable method for evaluation of individual skeletal maturation?(

49. Appearance of Sesamoid bone in Handwrist Xray means (

50. What is indicator of completion of growth in Handwrist Xray(

51.which one is indicator for pubertal growth spurt in handwrist Xray(

52. What is an indicator for Class III surgery timing in Handwrist Xray(

53. Cervical vertebra on the Cephalogram can be used to evaluate individual skeletal maturation without handwrist. What number of Cervical vertebra do we usually use?(

54. These are the relationship between amount of developmental space in primary dentition and possibility of crowding in permanent dentition. Which one is incorrect?(

55.Dr. Nolla divided the formation or calcification of permanent teeth into 10 stages. What stage is crown completion?(

56. What stage is 1/3 Root formation?(

57. Which one is not factor regulating and affecting teeth eruption?(

58. which Eruption sequence is correct?(

59. During eruption, all teeth erupt in the mesial direction even in alveolar bone. This is called as___________________________.(

60. When upper and lower teeth occlude during mastication, due to mesial axial inclination of teeth, chewing forces produce a mesial resultant through the contact points of teeth. The resultant forces is called ______________________.(

61. The reason why arch perimeter in mandibular arch decrease during transitional period. Which one is right? 1.Late mesial shift(Lee way space) / 2.Mesial drifting tendency / 3.Slight interproximal wear / 4.Lingual positioning of the incisors / 5.Originally tipped position of incisors and molars(

62. The following is changes of arch perimeter during the transitional period. Which is right? 1. Maxillary arch show slight increase in arch perimeter / 2. Mandibular arch show decrease in arch perimeter / 3. Maxillary arch show decrease in arch width / 4. Mandibular arch show increase in arch perimeter(

63. What do we call” Tooth size difference between 4 primary incisors and 4 permanent incisors”?(

64. What do we call the tooth size difference between primary CDE and permanent 345?(

65. The following is dissolving factors of incisors liability. Which is right? 1. Slight increase of arch width / 2. Developmental space / 3. Labial eruption of permanent incisors / 4. Primate space(

66. How much is Average Leeway space?(

67. There are 3 terminal plane in primary dentition, distal step, flush terminal plane, mesial step. (

68.How do occlusal changes occur from flush terminal (End to end molar) to Class I molar relationship during transitional period.(

69. If you want to promote successor permanent tooth, when do we extract predecessor primary tooth?(

72. The MOST stable area to evaluate the craniofacial growth is (

73 The human face is displaced (

74. At birth, which of the following structures is farthest from the size it will eventually be in adulthood? (

75. Additional space for the eruption of succeeding maxillary molars is made by (

76. Cartilage can grow by which of the following methods?(

77. At birth, which of the following structures is nearest the size it will eventually attain in adulthood? (

78. Arch length space for the eruption of permanent mandibular second and third molars is created by (

79. . Cephalometric studies show that, on the average, a. The mandible grows more slowly than the maxilla. b. The maxilla, during growth, is translated in a downward and forward direction. c. Cranial base growth determines mandibular growth. d. Mandibular growth stops after maxillary growth. (

80. The cranial vault increases rapidly in size the first few years postnatally and completes approximately 90 per cent of its growth by 6 years of age. This is typical of which of the following types of tissues? (

81. Which of the following are sites of cartilaginous growth postnatally? a. Spheno-occipital synchondrosis b. Mandibular condyle c. Frontomaxillary suture d. Nasal septum e. Alveolar process (

82. Interstitial growth is observed at which of the following sites? a. Spheno-occipital synchondrosis b. Maxillary tuberosity c. Mandibular condyle d. Zygomaticomaxillary suture e. Apex of an erupting premolar. (

83. Cartilage differs from bone in that cartilage can increase in size by (

84. Cross-sectional growth studies sample (

85. The grand design of the human face is the result of two growth processes which interact to produce the final result. What are they? 1. Remodeling 2. Displacement 3. Disarticulation 4. Occlusal equilibration 5. BPRD (

86 The maxilla grows by: (

87. Brachycephalic headforms are associated with Class III malocclusions (relative mandibular prognathia) and Dolichocephalic headforms are associated with Class II malocclusions (relative mandibular retrognathia) . (

88.. Mandibular retrusion tends to be a characteristic of:(

89. . In the primary dentition, a terminal plane occlusion usually turns into… (

90 What happens in lower arch length from deciduous to permanent dentition when measuring from the mesial of the first molars? (

91. Where are the primate spaces? (

92. Which bone is purely intramembranous? (

93. How many bones are in the craniofacial complex of adults? (

94.How many bones are in craniofacial at birth?(

95 The palate grows down by (

96. . The human face is displaced(

97. How does growth of the cranial base generally relate in time to growth of the jaws? (

98The "V" principle of growth is illustrated by the (

99. The greatest period of cranial growth occurs between (

100. What is the chief factor in the formation of the alveolar process? (

101. After age 6, the greatest increase in size of the mandible occurs (

102. In determining a patient's skeletal growth pattern, the most important factor is A. diet. (

103. Cartilage tissue is pressure tolerant and able to provide flexible support because it is avascular and contains an intracellular matrix of proteoglycans. (

104 Which of the following statements correctly describe bone growth: 1. There is a general uniform deposition of new bone on all periosteal surfaces. 2. There is a general uniform resorption of bone on all endosteal surfaces. 3. The endosteal surface may contribute significantly to new bone formation. 4. Interstitial growth of bone is necessary to change the morphology of the fetal face to the adult face. 5. Displacement of bones is necessary to change the fetal face to the adult face.(

105. Cortical drift occurs by a combination of periosteal deposition and endosteal resorption because deposition and resorption always occur together in equal and opposite amounts.(

106. Growth (remodeling and displacement) occurring in palatine bones results in relative changes in the position of the maxillae. This is an example of: (

107. The midface is suspended from: (