DENTAL- ORTHODONTICS & DANTO FACIAL ORTHOPAEDICS- PAGE 1
DENTAL- ORTHODONTICS & DANTO FACIAL ORTHOPAEDICS MCQs
1. Which of the following statement is correct about the dimension of inner bow of the face bow of the head gear?
(A) 0.045” and 1.25” round Stainless steel Wire (B) 0.051” and 0.7” round Stainless steel Wire
(C) 0.062” and 0.9” round Stainless steel Wire (D) 4.0” and 1.0” round Stainless steel Wire
Ans: A
2. The characteristic(s) of autosomal dominant transmission is / are?
(A) All affected individuals should have an affected parents (B) Both the sexes should be equally affected
(C) Approximately 50% of the offspring of an affected individual should also be affected (D) All of the above
Ans: D
3. When protraction headgear is used, most of the orthopedic changes are observed Within
(A) 1st month (B) 3-4th month (C) 8-10th month (D) 1 year
Ans: D
4. Which of the following is the best method to prevent enamel demineralization during fixed orthodontic treatment?
(A) Daily use of 1000–1100 ppm fluoride toothpaste
(B) Daily twice brushing of the tooth with fluoridated toothpaste
(C) Daily use of 0.05% NaF mouth rinse
(D) Demineralization of enamel is not common during orthodontic procedure; therefore any form of precaution is not needed.
Ans: C
5. According to Henrichsen, a distal shoe appliance is
(A) Class I fixed space maintainer (B) Class II fixed space maintainer (C) Class III fixed space maintainer (D) None of the above
Ans: B
6. In order to conduct a study of prevalence of malocclusion in India; which of the following method of sampling will be most appropriate? (A) Cluster sampling (B) Multistage Random Sampling (C) Simple Random sampling (D) Systematic Multistage sampling
Ans: B
7. Multiloop edgewise appliance is mainly used to correct which of the following malocclusions?
(A) Deep bite (B) Crossbite (C) Crowding (D) Open bite
Ans: D
8. Adams clasp will fracture if
(A) Wire is too hard and tags are placed too occlusally (B) Wire is too hard and tags are at normal position
(C) Wire is soft and tags interfere with occlusion (D) Acrylic plate too thin with pointed arrow head
Ans: A
9. Milwaukee brace is used for
(A) Correction of class III malocclusion (B) Correction of scoliosis (C) For stabilizing TMJ (D) All of the above
Ans: B
10. In “Index of Orthodontic Treatment Need” (IOTN) patient is placed between how Many grades ?
(A) 3 (B) 4 (C) 5 (D) 6
Ans: C
11. Who proposed non nutritive sucking is the result of prolongation of nursing and not the frustration of weaning
(A) Benjamin (B) Sheldon (C) Sears and Wise (D) Sigmund Freud
Ans: C
12. Which of the following statements is true about close and open NiTi coil springs Used in orthodontics?
(A) Open coil spring shows more constant load value of super-elastic than the close coil spring
(B) Close coil spring shows more constant load value of super-elastic than the open coil spring
(C) Both open and close coil spring show constant load value of super elasticity
(D) There is no co-relation in the load value of elasticity of open or close coil spring
Ans: A
13. Who believed that arch length should not be increased to a major extent to avoid relapse
(A) Mac couley (B) Nance (C) Alex Lundstrom (D) Kingsley
Ans: B
14. In craniometry study:
(A) Only cross sectional data can be gathered (B) Only longitudinal data can be gathered
(C) Both of the above (D) None of the above
Ans: A
15. Wilkinson advocated extraction of all first permanent molars at ............ age
(A) Between 8.5 and 9.5 years (B) Between 6.5 and 7.5 years (C) Between 10 and 12 years (D) None of the above
Ans: A
16. During stage II of the adolescent spurt in boys all are true except:
(A) Increase in height is just beginning (B) Pubic hair begins to appear (C) Increase in weight (D) Decrease in subcutaneous fat
Ans: C
17. Square jaw types would have
(A) Increase internal rotation (B) Horizontal palatal plane (C) Low mandibular plane angle (D) All of the above
Ans: D
18. According to Kingsley, which of the below factor is key factor in determining the stability of newly moved teeth
(A) Proper occlusion (B) Elastic recoil of gingival fibres (C) Cheek /lip/tongue pressures (D) All of the above
Ans: A
19. Relapse due to growth related changes occurs in
(A) Class II malocclusion (B) Class III malocclusion (C) Open bite (D) All of the above
Ans: D
20. The term ‘internal rotation’ correlates to:
(A) Rotation that occurs in the core of each jaw (B) Rotation that occurs on the surface of the jaw
(C) Counterclockwise direction (D) All of the above
Ans: A
21. In a well fabricated set of study models the ratio of the anatomic portion to artistic portion is
(A) 2:1 (B) 3:1 (C) 4:1 (D) 1:1
Ans: B
22. What is the maximum thickness of enamel in percentage can be reduced during the proximal stripping
(A) 25% (B) 50% (C) 30% (D) 75%
Ans: B
23. Fetal alcohol syndrome (F.A.S.) occurs by exposure to high levels of alcohol During:
(A) First trimester (B) Second trimester (C) Third trimester (D) Lactation period
Ans: A
24. Primate Space is also called:
(A) Simian space (B) Anthropoid space (C) Both (A) and (B) (D) None of the above
Ans: C
25. The British society of Orthodontics proposed the definition of Orthodontics in
(A) 1902 (B) 1922 (C) 1912 (D) 1932
Ans: B
26. Enamel damage is more likely to take place during debonding of which of the following brackets
(A) Metal bracket (B) Monocrystalline bracket
(C) Polycrystalline bracket (D) Enamel damage is same with metal, mono and polycrystalline brackets
Ans: B
27. Individual canine retraction can be carried out with
(A) Bull loop (B) Rickets cuspid retraction spring (C) Burstone T-loop (segmental) (D) All of the above
Ans: D
28. Transpalatal arch (TPA) and Nance holding arch both are widely used for anchorage conservation. Which of the following statement is correct about these two anchorage savers?
(A) TPA is not as effective as Nance holding arch in preserving anchorage in the sagittal dimension
(B) Nance holding arch is not as effective as TPA in preserving anchorage in the sagittal dimension
(C) Both the appliances are equally effective in preserving anchorage in sagittal dimension
(D) Effectiveness of these appliances cannot be predicted for preserving anchorage in sagittal dimension
Ans: A
29. The ANB angle in cephalometrics was introduced by
(A) Richard A Riedel (B) Alexander Jacobson (C) William B Downs (D) Emerson C Angel
Ans: A
30. Adolescence in girls can be divided into :
(A) 2 stage (B) 3 stage (C) 4 stage (D) 5 stage
Ans: B
31. In patients with short facial height, they are predictably and successfully treated by
(A) Inferior repositioning of the maxilla (B) Superior repositioning of the maxilla
(C) Mandibular ramus surgery (D) Forward movement of the maxilla
Ans: C
32. A relationship between mechanical stress and bone formation was suggested by:
(A) Wolff (B) Cullman (C) Frost (D) Kingsley
Ans: A
33. The groups of periodontal fibers which resist the masticatory forces are:
(A) Oblique (B) Transeptal (C) Horizontal (D) Alveolar
Ans: A
34. Pressure of current at the weld spot should be
(A) 1/20th of a second (B) 1/30th of a second (C) 1/10th of a second (D) Less than 1/10th of a second
Ans: D
35. Which of the following statement about posterior cranial base is correct as far as Class II and Class III malocclusions are concerned? (A) In Class III patients there is shortening of posterior cranial base compared to Class I and Class II malocclusion
(B) In Class II patients there is shortening of posterior cranial base compared to Class III and Class I malocclusion
(C) In Class III malocclusion patients there is lengthening of anterior cranial base compared to Class I and Class II malocclusion
(D) Posterior cranial base length in Class I, II and III malocclusion is same
Ans: A
36. At tissue level, growth from a tip that contains populations of dividing cells is described by
(A) Accretionary growth (B) Appositional growth (C) Meristematic growth (D) Compensatory growth
Ans: C
37. Bilaminar disk is comprised of
(A) Trophoblast and Myloblast (B) Embryoblastand Hypoblast (C) Epiblast and Hypoblast (D) Myloblast and Embryoblast
Ans: C
38. Functional matrix theory of growth was proposed:
(A) Sicher (B) Scott (C) Moss (D) Limborgh
Ans: C
39. Ectomorphic, mesomorphic and endomorphic classification of body physique was given by:
(A) Sheldon (B) Angle (C) LeeFoulon (D) Kjelgren
Ans: A
40. Who defines the posterior cross bite as ‘an abnormal bucco-lingual (labio-lingual) relationship of the teeth’?
(A) Moyers (B) Ngan (C) Graber (D) Angel or Angle
Ans: A
41. During the evolution of Twin Block functional appliance, the angulation of inclined plane has varied in which sequence?
(A) 90°-70°-45° (B) 45°-70°-90° (C) 70°-45°-90° (D) 90°-45°-70°
Ans: D
42. CBCT devices reduce radiation dose compared to conventional CT by
(A) 30 times (B) 20 times (C) 15 times (D) 10 times
Ans: C
43. The facemask is most effective orthopaedic appliance for treatment of which of the following category of skeletal Class III malocclusion with a retrusive maxilla and a hypo-divergent facial pattern?
(A) Mild (B) Mild to moderate (C) Moderate to severe (D) Severe
Ans: B
44. What is true about stereophotogrammetry
(A) Measurement of facial dimensions on the photograph of a patient
(B) X-ray motion picture obtained using cine camera
(C) Photographing a 3D object from 2 different coplanar planes to acquire a 3D reconstruction of images
(D) None of the above
Ans: C
45. Which of the following features is herald of Pierre Robin syndrome?
(A) Micrognathic mandible (B) Glossoptosis (C) Often a cleft in the neonate (D) All of the above
Ans: D
46. The main reason to place an alveolar bone graft at 7–10 years in cleft patients is to
(A) Encourage eruption of canines and lateral incisors (B) Improve speech
(C) Prevent arch constriction (D) Encourage normal maxillary growth
Ans: A
47. In which of the following direction the anchorage control by TPA is the least?
(A) Vertical (B) Sagittal (C) Transverse (D) It provide equally good anchorage in all the three dimensions
Ans: B
48. The continuous band of muscles constituting buccinators mechanism is anchored at:
(A) Pharyngeal tubercle of occipital bone (B) Supranuchal line of occipital bone
(C) Base of occipital bone (D) Infranuchal line of occipital bone
Ans: A
49. The self ligating bracket system was first introduced by
(A) Wildman (B) Herbert hansen (C) Stolzenberg (D) White
Ans: C
50. Light source that offers shortest curing time is
(A) Halogen (B) Plasma arc (C) argon (D) LED
Ans: B
(A) 0.045” and 1.25” round Stainless steel Wire (B) 0.051” and 0.7” round Stainless steel Wire
(C) 0.062” and 0.9” round Stainless steel Wire (D) 4.0” and 1.0” round Stainless steel Wire
Ans: A
2. The characteristic(s) of autosomal dominant transmission is / are?
(A) All affected individuals should have an affected parents (B) Both the sexes should be equally affected
(C) Approximately 50% of the offspring of an affected individual should also be affected (D) All of the above
Ans: D
3. When protraction headgear is used, most of the orthopedic changes are observed Within
(A) 1st month (B) 3-4th month (C) 8-10th month (D) 1 year
Ans: D
4. Which of the following is the best method to prevent enamel demineralization during fixed orthodontic treatment?
(A) Daily use of 1000–1100 ppm fluoride toothpaste
(B) Daily twice brushing of the tooth with fluoridated toothpaste
(C) Daily use of 0.05% NaF mouth rinse
(D) Demineralization of enamel is not common during orthodontic procedure; therefore any form of precaution is not needed.
Ans: C
5. According to Henrichsen, a distal shoe appliance is
(A) Class I fixed space maintainer (B) Class II fixed space maintainer (C) Class III fixed space maintainer (D) None of the above
Ans: B
6. In order to conduct a study of prevalence of malocclusion in India; which of the following method of sampling will be most appropriate? (A) Cluster sampling (B) Multistage Random Sampling (C) Simple Random sampling (D) Systematic Multistage sampling
Ans: B
7. Multiloop edgewise appliance is mainly used to correct which of the following malocclusions?
(A) Deep bite (B) Crossbite (C) Crowding (D) Open bite
Ans: D
8. Adams clasp will fracture if
(A) Wire is too hard and tags are placed too occlusally (B) Wire is too hard and tags are at normal position
(C) Wire is soft and tags interfere with occlusion (D) Acrylic plate too thin with pointed arrow head
Ans: A
9. Milwaukee brace is used for
(A) Correction of class III malocclusion (B) Correction of scoliosis (C) For stabilizing TMJ (D) All of the above
Ans: B
10. In “Index of Orthodontic Treatment Need” (IOTN) patient is placed between how Many grades ?
(A) 3 (B) 4 (C) 5 (D) 6
Ans: C
11. Who proposed non nutritive sucking is the result of prolongation of nursing and not the frustration of weaning
(A) Benjamin (B) Sheldon (C) Sears and Wise (D) Sigmund Freud
Ans: C
12. Which of the following statements is true about close and open NiTi coil springs Used in orthodontics?
(A) Open coil spring shows more constant load value of super-elastic than the close coil spring
(B) Close coil spring shows more constant load value of super-elastic than the open coil spring
(C) Both open and close coil spring show constant load value of super elasticity
(D) There is no co-relation in the load value of elasticity of open or close coil spring
Ans: A
13. Who believed that arch length should not be increased to a major extent to avoid relapse
(A) Mac couley (B) Nance (C) Alex Lundstrom (D) Kingsley
Ans: B
14. In craniometry study:
(A) Only cross sectional data can be gathered (B) Only longitudinal data can be gathered
(C) Both of the above (D) None of the above
Ans: A
15. Wilkinson advocated extraction of all first permanent molars at ............ age
(A) Between 8.5 and 9.5 years (B) Between 6.5 and 7.5 years (C) Between 10 and 12 years (D) None of the above
Ans: A
16. During stage II of the adolescent spurt in boys all are true except:
(A) Increase in height is just beginning (B) Pubic hair begins to appear (C) Increase in weight (D) Decrease in subcutaneous fat
Ans: C
17. Square jaw types would have
(A) Increase internal rotation (B) Horizontal palatal plane (C) Low mandibular plane angle (D) All of the above
Ans: D
18. According to Kingsley, which of the below factor is key factor in determining the stability of newly moved teeth
(A) Proper occlusion (B) Elastic recoil of gingival fibres (C) Cheek /lip/tongue pressures (D) All of the above
Ans: A
19. Relapse due to growth related changes occurs in
(A) Class II malocclusion (B) Class III malocclusion (C) Open bite (D) All of the above
Ans: D
20. The term ‘internal rotation’ correlates to:
(A) Rotation that occurs in the core of each jaw (B) Rotation that occurs on the surface of the jaw
(C) Counterclockwise direction (D) All of the above
Ans: A
21. In a well fabricated set of study models the ratio of the anatomic portion to artistic portion is
(A) 2:1 (B) 3:1 (C) 4:1 (D) 1:1
Ans: B
22. What is the maximum thickness of enamel in percentage can be reduced during the proximal stripping
(A) 25% (B) 50% (C) 30% (D) 75%
Ans: B
23. Fetal alcohol syndrome (F.A.S.) occurs by exposure to high levels of alcohol During:
(A) First trimester (B) Second trimester (C) Third trimester (D) Lactation period
Ans: A
24. Primate Space is also called:
(A) Simian space (B) Anthropoid space (C) Both (A) and (B) (D) None of the above
Ans: C
25. The British society of Orthodontics proposed the definition of Orthodontics in
(A) 1902 (B) 1922 (C) 1912 (D) 1932
Ans: B
26. Enamel damage is more likely to take place during debonding of which of the following brackets
(A) Metal bracket (B) Monocrystalline bracket
(C) Polycrystalline bracket (D) Enamel damage is same with metal, mono and polycrystalline brackets
Ans: B
27. Individual canine retraction can be carried out with
(A) Bull loop (B) Rickets cuspid retraction spring (C) Burstone T-loop (segmental) (D) All of the above
Ans: D
28. Transpalatal arch (TPA) and Nance holding arch both are widely used for anchorage conservation. Which of the following statement is correct about these two anchorage savers?
(A) TPA is not as effective as Nance holding arch in preserving anchorage in the sagittal dimension
(B) Nance holding arch is not as effective as TPA in preserving anchorage in the sagittal dimension
(C) Both the appliances are equally effective in preserving anchorage in sagittal dimension
(D) Effectiveness of these appliances cannot be predicted for preserving anchorage in sagittal dimension
Ans: A
29. The ANB angle in cephalometrics was introduced by
(A) Richard A Riedel (B) Alexander Jacobson (C) William B Downs (D) Emerson C Angel
Ans: A
30. Adolescence in girls can be divided into :
(A) 2 stage (B) 3 stage (C) 4 stage (D) 5 stage
Ans: B
31. In patients with short facial height, they are predictably and successfully treated by
(A) Inferior repositioning of the maxilla (B) Superior repositioning of the maxilla
(C) Mandibular ramus surgery (D) Forward movement of the maxilla
Ans: C
32. A relationship between mechanical stress and bone formation was suggested by:
(A) Wolff (B) Cullman (C) Frost (D) Kingsley
Ans: A
33. The groups of periodontal fibers which resist the masticatory forces are:
(A) Oblique (B) Transeptal (C) Horizontal (D) Alveolar
Ans: A
34. Pressure of current at the weld spot should be
(A) 1/20th of a second (B) 1/30th of a second (C) 1/10th of a second (D) Less than 1/10th of a second
Ans: D
35. Which of the following statement about posterior cranial base is correct as far as Class II and Class III malocclusions are concerned? (A) In Class III patients there is shortening of posterior cranial base compared to Class I and Class II malocclusion
(B) In Class II patients there is shortening of posterior cranial base compared to Class III and Class I malocclusion
(C) In Class III malocclusion patients there is lengthening of anterior cranial base compared to Class I and Class II malocclusion
(D) Posterior cranial base length in Class I, II and III malocclusion is same
Ans: A
36. At tissue level, growth from a tip that contains populations of dividing cells is described by
(A) Accretionary growth (B) Appositional growth (C) Meristematic growth (D) Compensatory growth
Ans: C
37. Bilaminar disk is comprised of
(A) Trophoblast and Myloblast (B) Embryoblastand Hypoblast (C) Epiblast and Hypoblast (D) Myloblast and Embryoblast
Ans: C
38. Functional matrix theory of growth was proposed:
(A) Sicher (B) Scott (C) Moss (D) Limborgh
Ans: C
39. Ectomorphic, mesomorphic and endomorphic classification of body physique was given by:
(A) Sheldon (B) Angle (C) LeeFoulon (D) Kjelgren
Ans: A
40. Who defines the posterior cross bite as ‘an abnormal bucco-lingual (labio-lingual) relationship of the teeth’?
(A) Moyers (B) Ngan (C) Graber (D) Angel or Angle
Ans: A
41. During the evolution of Twin Block functional appliance, the angulation of inclined plane has varied in which sequence?
(A) 90°-70°-45° (B) 45°-70°-90° (C) 70°-45°-90° (D) 90°-45°-70°
Ans: D
42. CBCT devices reduce radiation dose compared to conventional CT by
(A) 30 times (B) 20 times (C) 15 times (D) 10 times
Ans: C
43. The facemask is most effective orthopaedic appliance for treatment of which of the following category of skeletal Class III malocclusion with a retrusive maxilla and a hypo-divergent facial pattern?
(A) Mild (B) Mild to moderate (C) Moderate to severe (D) Severe
Ans: B
44. What is true about stereophotogrammetry
(A) Measurement of facial dimensions on the photograph of a patient
(B) X-ray motion picture obtained using cine camera
(C) Photographing a 3D object from 2 different coplanar planes to acquire a 3D reconstruction of images
(D) None of the above
Ans: C
45. Which of the following features is herald of Pierre Robin syndrome?
(A) Micrognathic mandible (B) Glossoptosis (C) Often a cleft in the neonate (D) All of the above
Ans: D
46. The main reason to place an alveolar bone graft at 7–10 years in cleft patients is to
(A) Encourage eruption of canines and lateral incisors (B) Improve speech
(C) Prevent arch constriction (D) Encourage normal maxillary growth
Ans: A
47. In which of the following direction the anchorage control by TPA is the least?
(A) Vertical (B) Sagittal (C) Transverse (D) It provide equally good anchorage in all the three dimensions
Ans: B
48. The continuous band of muscles constituting buccinators mechanism is anchored at:
(A) Pharyngeal tubercle of occipital bone (B) Supranuchal line of occipital bone
(C) Base of occipital bone (D) Infranuchal line of occipital bone
Ans: A
49. The self ligating bracket system was first introduced by
(A) Wildman (B) Herbert hansen (C) Stolzenberg (D) White
Ans: C
50. Light source that offers shortest curing time is
(A) Halogen (B) Plasma arc (C) argon (D) LED
Ans: B
51. Which of the following angles can be influenced during orthodontic/ orthopaedic therapy?
(A) Saddle angle (B) Gonial angle (C) Articular angle (D) Base plane angle
Ans: C
52. The terminologies internal and external rotation was proposed by:
(A) Solow and Houston (B) Bjork and Skeiller (C) Proffit (D) Shudy
Ans: C
53. In Wagon wheel, anterior arch wire torque negates arch wire tip in the ratio of
(A) 1:4 (B) 4:1 (C) 1:5 (D) 5:1
Ans: B
54. For stress relief annealing, stainless steel is heated to
(A) 200-225° for 30 minutes (B) 370-380° for 11 minutes
(C) 480- 500° for 15 minutes (D) 300- 325° for 10 minutes
Ans: B
55. Gonial angle with age tends to
(A) Increase in size (B) Decrease in size (C) First increase then decrease (D) First decrease then increase
Ans: D
56. Shape memory in nitinol is due to phase transformation from
(A) Austenite to Martensite (B) Austenite to Ferrite (C) Martensite to Ferrite (D) None of the above
Ans: A
57. Reason for curve of spee deepening with time
(A) Lower jaw grows downward forward (B) Lower jaw grows faster and longer than upper jaw
(C) Lower anterior teeth confined by upper anterior teeth. (D) All of the above
Ans: D
58. Additional anterior tip in Roth prescription was disadvantage due to:
(A) Significant drain of antero-posterior anchorage (B) Increased tendency of bite deeping during alignment phase
(C) It brought upper canine root apex too close to the first premolar root in some cases. (D) All of the above
Ans: D
59. Moment to force ratio for translational moment is
(A) 10:1 (B) 7:1 (C) 12:1 (D) 8:1
Ans: A
60. “Triad of factors” which decides the severity of malocclusion is
(A) Activity, duration, frequency (B) Duration, intensity, frequency
(C) Frequency, activity, intensity (D) None of the above
Ans: B
61. Vertical maxillary excess in a growing child can be controlled by using
(A) High pull headgear (B) Combination pull headgear (C) Cervical pull headgear (D) Facemask
Ans: A
62. Zygoma/Key ridge corresponds to
(A) Mesiobuccal root of upper 1st molar
(B) Distobuccal root of upper 1st molar
(C) Mesiobuccal root of upper 2nd molar
(D) Distobuccal root of upper second molar
Ans: A
63. Removable appliances generate
(A) Intermittent force (B) Interrupted force (C) Both (A) and (B) (D) None of the above
Ans: A
64. Which of the following orthodontic bracket and wire combination produces the minimum friction during various orthodontic tooth movements?
(A) Ceramic bracket with stainless steel wire
(B) Ceramic bracket with TMA wire
(C) Ceramic bracket with metal insert and stainless steel wire
(D) Ceramic bracket with metal insert and TMA wire
Ans: C
65. Incompetent lips may be seen in
(A) Increased anterior facial height (B) Flaccid face (C) Enlarge adenoids (D) Mature swallow
Ans: A
66. Which of the following statement is correct as far as point of force application is concerned in labial and lingual orthodontic appliances?
(A) In labial orthodontic appliance point of force application is closer to tooth axis than the lingual orthodontic appliance
(B) In lingual orthodontic appliance the point of force application is closer to the tooth axis than the labial appliance
(C) The point of force application is same in both labial and lingual orthodontic appliance
(D) There is no correlation in point of application of force and tooth axis in both labial and lingual technique
Ans: B
67. Second order / Tip back bends are given in archwires in
(A) Vertical direction (B) Horizontal direction (C) Both (A) and (B) (D) None of the above
Ans: A
68. For physiologic type of tooth movement, which type of bone is essential
(A) Dense cortical type (B) Large trabecular spongy bone (C) Dense lamellar bone (D) Combination of above
Ans: B
69. Onychophagy is also known as
(A) Tongue thrusting (B) Lip sucking (C) Nail biting (D) Thumb sucking
Ans: C
70. Which of the following is known as “cornucopia” of mandible?
(A) Condylar cartilage (B) Lateral pterygoid cartilage (C) Alveolar process (D) Ramus of mandible
Ans: A
71. Actual loss of torque is ............ as of the play between wire and the bracket slot.
(A) Same (B) Double (C) Triple (D) Cannot be predicted
Ans: A
72. When the material is strained beyond its yield point in one direction and then strained in reverse direction, its yield strength in reverse direction is reduced. This is known as
(A) Sensitization (B) Hysteresis (C) Baushinger effect (D) Cyclic fatigue
Ans: C
73. During setting of alginate impression material
(A) Trisodium phosphate reacts with sodiun alginate
(B) Trisodium phosphate reacts with calcium sulphate
(C) Colloidal gel changes to sol
(D) Material in contact with soft tissues sets last
Ans: B
74. ‘Rule of tens’ for cleft lip surgery are all except
(A) 10 weeks of age (B) 10 gms of haemoglobin (C) 10 months of age (D) 10 pounds weight
Ans: C
75. NiTi was first introduced in orthodontics by
(A) Burstone and Goldberg (B) Andreasen and Buehler (C) Talass (D) Beartley
Ans: B
76. Antegonial notch is prominent when mandibular growth is
(A) Forward and upward
(B) Forward and downward
(C) Downward and backward
(D) Antegonial notching prominent in all types of mandibular growth pattern
Ans: C
77. The process of plastically deforming a metal (usually at room temperature) accompanied by strain hardening is
(A) Cold welding (B) Spot welding (C) Pot welding (D) Hot welding
Ans: A
78. Osteoclastogenesis is regulated by
(A) Relative expression of RANKL and OPG (B) PTH and Vit D3
(C) Decrease OPG expression (D) All of the above
Ans: D
79. Mattress spring is used for
(A) Mesiodistal tooth movement (B) Anterior tooth crossbite
(C) Move the tooth buccally (D) Correction of the labial movement of teeth in cross bite
Ans: D
80. Which of the following statement is correct about the bone and periodontal ligament?
(A) Bone deforms far more readily than the PDL (B) PDL deformation far more readily than the bone
(C) Rate of bone and PDL deformation is same (D) None of the above
Ans: A
81. Er: YAGEr is a hard tissue laser in
(A) Gas state (B) Solid state (C) Liquid state (D) None of the above
Ans: B
82. Which of Riedel’s Theorem states “malocclusion should be over corrected as a safety factor”
(A) Theorem 1 (B) Theorem 2 (C) Theorem 3 (D) Theorem 4
Ans: C
83. Types of face mask are all except
(A) HAAS type (B) Tubinger type (C) Petit type (D) Delaire type
Ans: A
84. To localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, which of the following would be most effective
(A) Cone beam computer tomography (B) OPG (C) Lateral cephalogram (D) A periapical and an occlusal view
Ans: A
85. Ceramic orthodontic brackets are attached to the tooth surface by means of
(A) Mechanical/physical bond (B) Chemical bond (C) Van der Waal forces (D) Both (A) and (B)
Ans: D
86. Example of removable tooth borne functional appliance is
(A) Activator (B) Jasper Jumper (C) Churro Jumper (D) Herbst appliance
Ans: A
87. Type of tooth movement achieved by removable orthodontic appliance are
(A) Tipping (B) Simple rotation (C) Both (A) and (B) (D) None of the above
Ans: C
88. Which of the following statements is correct?
(A) Incisor intrusion is more predictable in upper arch than the lower arch
(B) Lower incisor intrusion is usually expressed more with incisor flaring than intrusion
(C) Incisor intrusion is more predictable in lower arch
(D) Both (A) and (B)
Ans: B
89. The ratio of skeletal: dental expansion obtained finally after Rapid palatal Expansion is
(A) 4:1 (B) 3:1 (C) 2:1 (D) 1:1
Ans: D
90. A hyperactive mentalis muscle causes
(A) Gingival recession in anterior teeth (B) Lingual tipping of lower anteriors
(C) Flattening of chin button (D) Flaring and spacing in lower anteriors
Ans: B
91. Rocker’s jaws represent
(A) Jaw with no antigonial notch (B) Jaw with antigonial notch
(C) Underdeveloped jaw (D) None of the above
Ans: A
92. Separation anxiety’ at the early stage of emotional development is seen in which stage of Erikson’s Theory?
(A) Development of autonomy (B) Development of personal identity (C) Development of initiative (D) Development of basic trust
Ans: D
93. Modeling’ is:
(A) Type of operant conditioning for use in dental office (B) Imitation of behaviour observed by others in a dental clinic
(C) To perform on stage (D) A type of cognitive learning
Ans: B
94. Gene responsible for patterning of the midline is
(A) Goosecoid gene (B) DLX-1 (C) BARX (D) Sonic hedgehog
Ans: D
95. Which type of malocclusionis often considered as a genetic trait
(A) Class I malocclusion (B) Class II Div. I (C) Class II Div. II (D) Both (A) and (B)
Ans: C
96. Growth of sphenooccipital synchondrosis ceases at around
(A) 20yrs (B) 15yrs (C) 10yrs (D) At birth
Ans: B
97. The maxillary teeth which have single antagonist are
(A) Permanent central incisor (B) Third molars (C) Lateral incisors (D) Permanent canines
Ans: B
(A) Saddle angle (B) Gonial angle (C) Articular angle (D) Base plane angle
Ans: C
52. The terminologies internal and external rotation was proposed by:
(A) Solow and Houston (B) Bjork and Skeiller (C) Proffit (D) Shudy
Ans: C
53. In Wagon wheel, anterior arch wire torque negates arch wire tip in the ratio of
(A) 1:4 (B) 4:1 (C) 1:5 (D) 5:1
Ans: B
54. For stress relief annealing, stainless steel is heated to
(A) 200-225° for 30 minutes (B) 370-380° for 11 minutes
(C) 480- 500° for 15 minutes (D) 300- 325° for 10 minutes
Ans: B
55. Gonial angle with age tends to
(A) Increase in size (B) Decrease in size (C) First increase then decrease (D) First decrease then increase
Ans: D
56. Shape memory in nitinol is due to phase transformation from
(A) Austenite to Martensite (B) Austenite to Ferrite (C) Martensite to Ferrite (D) None of the above
Ans: A
57. Reason for curve of spee deepening with time
(A) Lower jaw grows downward forward (B) Lower jaw grows faster and longer than upper jaw
(C) Lower anterior teeth confined by upper anterior teeth. (D) All of the above
Ans: D
58. Additional anterior tip in Roth prescription was disadvantage due to:
(A) Significant drain of antero-posterior anchorage (B) Increased tendency of bite deeping during alignment phase
(C) It brought upper canine root apex too close to the first premolar root in some cases. (D) All of the above
Ans: D
59. Moment to force ratio for translational moment is
(A) 10:1 (B) 7:1 (C) 12:1 (D) 8:1
Ans: A
60. “Triad of factors” which decides the severity of malocclusion is
(A) Activity, duration, frequency (B) Duration, intensity, frequency
(C) Frequency, activity, intensity (D) None of the above
Ans: B
61. Vertical maxillary excess in a growing child can be controlled by using
(A) High pull headgear (B) Combination pull headgear (C) Cervical pull headgear (D) Facemask
Ans: A
62. Zygoma/Key ridge corresponds to
(A) Mesiobuccal root of upper 1st molar
(B) Distobuccal root of upper 1st molar
(C) Mesiobuccal root of upper 2nd molar
(D) Distobuccal root of upper second molar
Ans: A
63. Removable appliances generate
(A) Intermittent force (B) Interrupted force (C) Both (A) and (B) (D) None of the above
Ans: A
64. Which of the following orthodontic bracket and wire combination produces the minimum friction during various orthodontic tooth movements?
(A) Ceramic bracket with stainless steel wire
(B) Ceramic bracket with TMA wire
(C) Ceramic bracket with metal insert and stainless steel wire
(D) Ceramic bracket with metal insert and TMA wire
Ans: C
65. Incompetent lips may be seen in
(A) Increased anterior facial height (B) Flaccid face (C) Enlarge adenoids (D) Mature swallow
Ans: A
66. Which of the following statement is correct as far as point of force application is concerned in labial and lingual orthodontic appliances?
(A) In labial orthodontic appliance point of force application is closer to tooth axis than the lingual orthodontic appliance
(B) In lingual orthodontic appliance the point of force application is closer to the tooth axis than the labial appliance
(C) The point of force application is same in both labial and lingual orthodontic appliance
(D) There is no correlation in point of application of force and tooth axis in both labial and lingual technique
Ans: B
67. Second order / Tip back bends are given in archwires in
(A) Vertical direction (B) Horizontal direction (C) Both (A) and (B) (D) None of the above
Ans: A
68. For physiologic type of tooth movement, which type of bone is essential
(A) Dense cortical type (B) Large trabecular spongy bone (C) Dense lamellar bone (D) Combination of above
Ans: B
69. Onychophagy is also known as
(A) Tongue thrusting (B) Lip sucking (C) Nail biting (D) Thumb sucking
Ans: C
70. Which of the following is known as “cornucopia” of mandible?
(A) Condylar cartilage (B) Lateral pterygoid cartilage (C) Alveolar process (D) Ramus of mandible
Ans: A
71. Actual loss of torque is ............ as of the play between wire and the bracket slot.
(A) Same (B) Double (C) Triple (D) Cannot be predicted
Ans: A
72. When the material is strained beyond its yield point in one direction and then strained in reverse direction, its yield strength in reverse direction is reduced. This is known as
(A) Sensitization (B) Hysteresis (C) Baushinger effect (D) Cyclic fatigue
Ans: C
73. During setting of alginate impression material
(A) Trisodium phosphate reacts with sodiun alginate
(B) Trisodium phosphate reacts with calcium sulphate
(C) Colloidal gel changes to sol
(D) Material in contact with soft tissues sets last
Ans: B
74. ‘Rule of tens’ for cleft lip surgery are all except
(A) 10 weeks of age (B) 10 gms of haemoglobin (C) 10 months of age (D) 10 pounds weight
Ans: C
75. NiTi was first introduced in orthodontics by
(A) Burstone and Goldberg (B) Andreasen and Buehler (C) Talass (D) Beartley
Ans: B
76. Antegonial notch is prominent when mandibular growth is
(A) Forward and upward
(B) Forward and downward
(C) Downward and backward
(D) Antegonial notching prominent in all types of mandibular growth pattern
Ans: C
77. The process of plastically deforming a metal (usually at room temperature) accompanied by strain hardening is
(A) Cold welding (B) Spot welding (C) Pot welding (D) Hot welding
Ans: A
78. Osteoclastogenesis is regulated by
(A) Relative expression of RANKL and OPG (B) PTH and Vit D3
(C) Decrease OPG expression (D) All of the above
Ans: D
79. Mattress spring is used for
(A) Mesiodistal tooth movement (B) Anterior tooth crossbite
(C) Move the tooth buccally (D) Correction of the labial movement of teeth in cross bite
Ans: D
80. Which of the following statement is correct about the bone and periodontal ligament?
(A) Bone deforms far more readily than the PDL (B) PDL deformation far more readily than the bone
(C) Rate of bone and PDL deformation is same (D) None of the above
Ans: A
81. Er: YAGEr is a hard tissue laser in
(A) Gas state (B) Solid state (C) Liquid state (D) None of the above
Ans: B
82. Which of Riedel’s Theorem states “malocclusion should be over corrected as a safety factor”
(A) Theorem 1 (B) Theorem 2 (C) Theorem 3 (D) Theorem 4
Ans: C
83. Types of face mask are all except
(A) HAAS type (B) Tubinger type (C) Petit type (D) Delaire type
Ans: A
84. To localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, which of the following would be most effective
(A) Cone beam computer tomography (B) OPG (C) Lateral cephalogram (D) A periapical and an occlusal view
Ans: A
85. Ceramic orthodontic brackets are attached to the tooth surface by means of
(A) Mechanical/physical bond (B) Chemical bond (C) Van der Waal forces (D) Both (A) and (B)
Ans: D
86. Example of removable tooth borne functional appliance is
(A) Activator (B) Jasper Jumper (C) Churro Jumper (D) Herbst appliance
Ans: A
87. Type of tooth movement achieved by removable orthodontic appliance are
(A) Tipping (B) Simple rotation (C) Both (A) and (B) (D) None of the above
Ans: C
88. Which of the following statements is correct?
(A) Incisor intrusion is more predictable in upper arch than the lower arch
(B) Lower incisor intrusion is usually expressed more with incisor flaring than intrusion
(C) Incisor intrusion is more predictable in lower arch
(D) Both (A) and (B)
Ans: B
89. The ratio of skeletal: dental expansion obtained finally after Rapid palatal Expansion is
(A) 4:1 (B) 3:1 (C) 2:1 (D) 1:1
Ans: D
90. A hyperactive mentalis muscle causes
(A) Gingival recession in anterior teeth (B) Lingual tipping of lower anteriors
(C) Flattening of chin button (D) Flaring and spacing in lower anteriors
Ans: B
91. Rocker’s jaws represent
(A) Jaw with no antigonial notch (B) Jaw with antigonial notch
(C) Underdeveloped jaw (D) None of the above
Ans: A
92. Separation anxiety’ at the early stage of emotional development is seen in which stage of Erikson’s Theory?
(A) Development of autonomy (B) Development of personal identity (C) Development of initiative (D) Development of basic trust
Ans: D
93. Modeling’ is:
(A) Type of operant conditioning for use in dental office (B) Imitation of behaviour observed by others in a dental clinic
(C) To perform on stage (D) A type of cognitive learning
Ans: B
94. Gene responsible for patterning of the midline is
(A) Goosecoid gene (B) DLX-1 (C) BARX (D) Sonic hedgehog
Ans: D
95. Which type of malocclusionis often considered as a genetic trait
(A) Class I malocclusion (B) Class II Div. I (C) Class II Div. II (D) Both (A) and (B)
Ans: C
96. Growth of sphenooccipital synchondrosis ceases at around
(A) 20yrs (B) 15yrs (C) 10yrs (D) At birth
Ans: B
97. The maxillary teeth which have single antagonist are
(A) Permanent central incisor (B) Third molars (C) Lateral incisors (D) Permanent canines
Ans: B