Question 1. According to Wolff’s law:
A. Human teeth drift mesially as interproximal wear occurs
B. Pressure causes bone resorption
C. The optimal level of force for moving teeth is 10 to 200 gm
D. Bone trabeculae line up in response to mechanical stress
Correct Answer: D
Question 2. Overjet is defined as:
A. Horizontal overlap
B. Vertical overlap
C. Transverse plane discrepancy
D. All of the above
Correct Answer: A
Question 3. Abnormal thick labial frenum results in:
A. Midline diastema
B. Imbrication
C. Labial inclination of incisors
D. All of the above
Correct Answer: A
Question 4. Hyperactive mentalis muscle is the feature of:
A. Class 1
B. Class 2 Div. 1
C. Class 3 Div. 2
D. Class 3
Correct Answer: B
Question 5. If the force applied is through the tooth’s center of resistance, then the tooth will:
A. Tip
B. Translate
C. Move bodily
D. Intrude
Correct Answer: B
Question 6. Anchorage is most effective in:
A. Round roots
B. Flat roots
C. Triangular roots
D. All of these equally
Correct Answer: D
Question 7. Examples of fixed functional appliances:
A. Activator
B. Frankel
C. Bimler
D. Herbst
Correct Answer: D
Question 8. Elastics are used in fixed appliances:
A. To correct Class II molar relation
B. To correct Class III molar relation
C. Directly attached to appliance component
D. All of the above
Correct Answer: D
Question 9. Extraction of permanent molars is called:
A. Balanced extraction
B. Serial extraction
C. Wilkinson’s extraction
D. Compensated extraction
Correct Answer: C
Question 10. Which of the following wires are called shape memory wires?
A. Stainless steel round wire
B. Multiflex round wire
C. Nickel-titanium wires
D. Stainless steel edgewise wire
Correct Answer: C
Question 11. Lip bumpers are used to move:
A. Lower molar distally
B. Lower incisor distally
C. Upper incisor labially
D. Upper molar distally
Correct Answer: A
Question 12. A tooth will translate when the center of rotation is at:
A. The incisal edge
B. The bracket
C. Infinity
D. The root apex
Correct Answer: C
Question 13. The Adams clasp is made of:
A. 24 mil wire
B. 28 mil wire
C. 23 mil wire
D. 22 mil wire
Correct Answer: B
Question 14. Optimal orthodontic force according to Schwartz is:
A. 30-36 grams per sq cm
B. 20-26 grams per sq cm
C. 20-26 grams per sq inch
D. 20-26 grams per sq mm
Correct Answer: B
Question 15. Denholtz appliance is used for:
A. Correction of open bite
B. Distalization of the upper molars
C. Correction of deep bite
D. Correction of anterior crossbite
Correct Answer: B
Question 16. 18/8 stainless steel:
A. 18% Nickel, 8% chromium
B. 18% Chromium, 8% copper
C. 18% Chromium, 8% nickel
D. None of the above
Correct Answer: C
Question 17. The main criteria for serial extraction is:
A. Spacing
B. Crowding
C. Jaw relation
D. Patient’s cooperation
Correct Answer: B
Question 18. Orthodontic correction of which of the following is most easily retained:
A. Anterior crossbite
B. Crowding
C. Diastema
D. Spacing
Correct Answer: A
Question 19. Which of the following cannot act as a space maintainer?
A. Well-restored tooth
B. Lingual arch
C. Nance holding arch
D. Maxillary expansion device
Correct Answer: D
Question 20. A helix is placed for:
A. Activation
B. Increasing the flexibility and range
C. Esthetics
D. Retention
Correct Answer: B
Question 21. Cranium to face ratio at birth is:
A. 40:1
B. 5:1
C. 8:1
D. 2:1
Correct Answer: C
Question 22. The major growth center of mandible is:
A. Symphysis
B. Condyle
C. Alveolar bone
D. None of the above
Correct Answer: B
Question 23. With the growth of mandible from birth to the adult stage the gonial angle:
A. Increases
B. Decreases
C. Remains the same
D. First increases then decreases
Correct Answer: B
Question 24. The first ossification center of the mandible in relation to Meckel’s cartilage develops:
A. Mesial to Meckel’s cartilage
B. Superior to Meckel’s cartilage
C. Lateral to Meckel’s cartilage
D. Within the Meckel’s cartilage
Correct Answer: C
Question 25. Which of the following structures do not contribute to cranial growth?
A. Sphenoethmoidal synchondrosis
B. Sphenooccipital synchondrosis
C. Frontonasal suture
D. Lambdoid suture
Correct Answer: D
Question 26. The first evidence of dental lamina is seen at:
A. 4th week of intrauterine life
B. 6th week of intrauterine life
C. 3rd month of intrauterine life
D. 4th month of intrauterine life
Correct Answer: B
Question 27. The incisal liability in the maxillary arch and the mandibular arch is respectively:
A. 10 mm and 8 mm
B. 7 mm and 5 mm
C. 3 mm and 6 mm
D. 4 mm and 12 mm
Correct Answer: B
Question 28. According to Edward Angle, the position of maxillary first permanent molar is fixed about:
A. Key ridge
B. ANS
C. PNS
D. Pterygoid process
Correct Answer: A
Question 29. Tooth erupts into oral cavity when:
A. One third root formation completed
B. Two third root formation completed
C. Root is fully formed
D. Crown is fully formed
Correct Answer: B
Question 30. A boy aged 8 years has lost his maxillary deciduous second molar on right side due to caries. Treatment by the dentist at this stage involves:
A. Extraction of deciduous maxillary second molar on left side to maintain symmetry of maxillary arch
B. Mesial movement of maxillary first permanent molar on right side to close the space created by lost tooth
C. Immediate space maintainer
D. None of the above
Correct Answer: C
Question 31. The six keys to normal occlusion was introduced by:
A. Dewey
B. Andrews
C. Tweed
D. Angle
Correct Answer: B
Question 32. Enlow’s “V” principle of growth is found in:
A. Cranial base
B. Maxilla only
C. Maxilla and mandible
D. None of the above
Correct Answer: C
Question 33. As skeletal changes take place gonion moves:
A. Downward and forward
B. Downward and backward
C. Upward and forward
D. Upward and backward
Correct Answer: B
Question 34. Sequence of eruption of permanent maxillary teeth:
A. 6-1-2-4-3-5-7
B. 6-1-2-4-5-3-7
C. 6-1-2-3-4-5-7
D. 1-2-3-4-5-6-7
Correct Answer: A
Question 35. In occlusion the teeth have:
A. Cusp-to-cusp contact
B. Edge-to-edge contact
C. Marginal contact
D. Surface-to-surface contact
Correct Answer: D
Question 36. Hyperactive mentalis muscle is a prominent feature of:
A. Class 1
B. Class 2 Div. 1
C. Class 2 Div. 2
D. Class 3
Correct Answer: B
Question 37. Chin cup is used to correct:
A. Skeletal Class 1 malocclusion
B. Skeletal Class 2 malocclusion
C. Skeletal Class 3 malocclusion
D. Dental Class 1 malocclusion
Correct Answer: C
Question 38. Oral drive theory to explain thumb sucking habit was given by:
A. Benjamin
B. Sears and Wise
C. Sigmund Freud
D. Sheldon
Correct Answer: B
Question 39. Apertognathia means:
A. Anterior crossbite
B. Open bite
C. Posterior crossbite
D. Prognathism
Correct Answer: B
Question 40. Prolonged retention is usually needed in:
A. Diastema
B. Mild crowding
C. Anterior crossbite
D. Deep bite
Correct Answer: A
Question 41. Dolichocephalic refers to:
A. Long wide faces
B. Long narrow faces
C. Short wide faces
D. Short narrow faces
Correct Answer: B
Question 42. Calcification of first molar starts at:
A. 2 weeks of IU life
B. At birth
C. 6 months after birth
D. 30 months after birth
Correct Answer: B
Question 43. In Sicher’s theory suture acts as:
A. Has independent growth potential
B. Dependent on cranial base
C. Used for growth adjustment
D. None of the above
Correct Answer: A
Question 44. The following profile is more prone to fractures of maxillary incisors:
A. Class 1
B. Class 2 Div. 1
C. Class 2 Div. 2
D. Class 3
Correct Answer: B
Question 45. The cause of pseudo-class 3 malocclusion is:
A. Developmental deficiency
B. Increased mandibular growth
C. Functional abnormality
D. Hormonal disturbances
Correct Answer: C
Question 46. In Ackermann-Profit classification, outer envelop represents:
A. Alignment
B. Profile
C. Transverse relation
D. Vertical relation
Correct Answer: B
Question 47. Fishman’s index is used in relation with:
A. Population
B. Hand-wrist radiograph
C. Cephalogram
D. Periodontal disease
Correct Answer: B
Question 48. Which of the following does not lie on the mandible?
A. Pogonion
B. Menton
C. Porion
D. Gnathion
Correct Answer: C
Question 49. Angle of convexity:
A. SNA
B. SNB
C. N-A-Pog
D. ANB
Correct Answer: C
Question 50. The appliance used to treat thumb sucking:
A. Crib appliance
B. Frankel appliance
C. Bionator
D. Activator
Correct Answer: A
Question 51. The term orthodontics was coined by:
A. Joachim Lefoulon
B. Hunter
C. Carabelli
D. Norman Kingsley
Correct Answer: A
Question 52. Oral and nasal capsule of functional growth is related to:
A. Periosteal matrix
B. Sutural matrix
C. Capsular matrix
D. None of the above
Correct Answer: C
Question 53. The ugly-duckling stage is seen at the age of:
A. 6–7 years
B. 9–10 years
C. 10–12 years
D. 12–14 years
Correct Answer: B
Question 54. If dentition is placed close to Frankfort horizontal plane then it is called as:
A. Protraction
B. Attraction
C. Abstraction
D. Contraction
Correct Answer: B
Question 55. Acromegaly is associated with:
A. Class 1 malocclusion
B. Class 2 malocclusion
C. Class 3 malocclusion
D. Class 1 crossbite
Correct Answer: C
Question 56. The most anterior part of bony chin:
A. Gonion
B. Pogonion
C. Menton
D. Gnathion
Correct Answer: B
Question 57. The cells involved in bone resorption are:
A. Osteoblasts
B. Osteoclasts
C. Osteocytes
D. None of these
Correct Answer: B
Question 58. Maximum resistance to tooth movement is given by:
A. Mandibular molar
B. Maxillary molar
C. Mandibular canine
D. Maxillary canine
Correct Answer: A
Question 59. Example of fixed functional appliance:
A. Activator
B. Frankel
C. Bimler
D. Herbst
Correct Answer: D (Note: Earlier Q7 also lists Herbst as correct; Frankel is typically a myofunctional appliance, not fixed functional, so D is consistent here)
Question 60. Which of the following is the non-invasive method of gaining space?
A. Slenderization
B. Expansion
C. Extraction
D. All of the above
Correct Answer: B
Question 61. Calcification of first permanent molar starts at:
A. 1½ week of IU life
B. At birth
C. 6 months after birth
D. 2½ years after birth
Correct Answer: B
Question 62. Eruption of teeth is delayed in all of the following except:
A. Hypothyroidism and cleidocranial dysplasia
B. Acromegaly and hyperthyroidism
C. Rickets and cherubism
D. Cretinism and dentigerous cysts
Correct Answer: B. Acromegaly and hyperthyroidism
Question 63. The most reproducible relation of the jaws is:
A. Centric occlusion
B. Centric relation
C. Protrusive contact position
D. Lateral contact position
Correct Answer: B
Question 64. A pseudo-class 3 is differentiated from true class 3 by:
A. Presence of premature contacts
B. Normal gonial angle
C. Deviated path of closure
D. All of the above
Correct Answer: D
Question 65. Abnormal muscular activity more often is result of:
A. Bruxism
B. Nail biting
C. Tongue thrusting
D. Tongue sucking
Correct Answer: C
Question 66. Blanch test is used in the diagnosis of:
A. Abnormal frenal attachments
B. Pseudo Class 3
C. Tongue thrusting
D. Thumb sucking
Correct Answer: A
Question 67. Arch perimeter is measured with:
A. Cephalogram
B. Brass wire
C. Vernier caliper
D. Occlusal radiograph
Correct Answer: B
Question 68. Which of the following landmarks is present at the angle of mandible?
A. Gnathion
B. Gonion
C. Pogonion
D. Porion
Correct Answer: B
Question 69. Carpal radiographs are used for assessment of:
A. Bone condition
B. Chronological age
C. Treatment plan
D. Skeletal maturation
Correct Answer: D
Question 70. Y-axis is used to analyze:
A. Maxillary growth
B. Mandibular growth
C. Both maxillary and mandibular growth
D. To design appliance
Correct Answer: B
Question 71. In translation center of rotation is at:
A. Apical 1/3rd
B. Infinity
C. Apex
D. Coronal 1/3rd
Correct Answer: B
Question 72. Baker’s anchorage is a type of:
A. Intermaxillary anchorage
B. Intramaxillary anchorage
C. Extraoral anchorage
D. Skeletal anchorage
Correct Answer: A
Question 73. Blanch test is used in diagnosis of:
A. Abnormal frenal attachment
B. Pseudo class 3
C. Tongue thrust
D. Thumb sucking
Correct Answer: A
Question 74. Posterior bite plane is used in correcting:
A. Deep bite
B. Anterior crossbite
C. Posterior crossbite
D. Crowding
Correct Answer: B
Question 75. Anterior open bite is caused by:
A. Bruxism
B. Lip biting
C. Thumb sucking
D. Nail biting
Correct Answer: C
Question 76. Example of fixed functional appliance:
A. Activator
B. Frankel
C. Oral screen
D. Herbst
Correct Answer: D
Question 77. The process of securing arch wire to the bracket is known as:
A. Separation
B. Bonding
C. Ligation
D. Isolation
Correct Answer: C
Question 78. Wilkinson’s extraction is:
A. Extraction of 1st molars
B. Extraction of 2nd molars
C. Extraction of 3rd molars
D. Extraction of 1st premolars
Correct Answer: A
Question 79. Vestibular screen works on the principle of:
A. Force application
B. Force elimination
C. Both of the above
D. None of the above
Correct Answer: C
Question 80. Which of the following is not a type of labial bow?
A. Short
B. Long
C. Medium
D. Reverse
Correct Answer: C
Question 81. Which branch of orthodontics is mostly related to mixed dentition period?
A. Preventive
B. Interceptive
C. Corrective
D. Surgical
Correct Answer: B
Question 82. The body tissue that grows rapidly but shows minimal growth after the age of 6–7 years is:
A. Neural tissue
B. Lymphoid tissue
C. Genital tissue
D. Skeletal tissue
Correct Answer: A
Question 83. Servosystem theory of growth was given by:
A. Scot
B. Petrovic
C. Limborgh
D. Van der Klaw
Correct Answer: B
Question 84. Most of the mesenchymal structures of the face are formed from:
A. Ectoderm
B. Endoderm
C. Neural crest cells
D. Mesoderm
Correct Answer: C
Question 85. At what age is a child expected to have 12 primary teeth and 12 erupted permanent teeth?
A. 4.5 years
B. 6.5 years
C. 8.5 years
D. 11.5 years
Correct Answer: D (Note: Typically around 11–12 years, 11.5 years aligns with mixed dentition phase)
Question 86. Most of the leeway space is contributed by:
A. Second primary molar
B. Primary canine
C. First primary molar
D. Same by all
Correct Answer: A
Question 87. The final form of dental arch is finally determined by:
A. Facial type
B. Growth pattern
C. Angle’s classification
D. Balance between intraoral and extraoral muscle force
Correct Answer: D
Question 88. In occlusion the teeth have:
A. Cusp-to-cusp contact
B. Edge-to-edge contact
C. Marginal contact
D. Surface-to-surface contact
Correct Answer: D
Question 89. If the tooth has not erupted to the line of occlusion it is called:
A. Supraversion
B. Torsiversion
C. Rotated
D. Infraversion
Correct Answer: D
Question 90. Which one of the following has maximum familial tendency?
A. Protruded maxillary incisors
B. Open bite
C. Deep bite
D. Upper and lower crossbite
Correct Answer: C
Question 91. Rearward resorption is seen in:
A. Application of light forces
B. Application of heavy forces
C. Both of the above
D. None of the above
Correct Answer: B
Question 92. A typical formulation of stainless steel wire for orthodontic use has:
A. 18% chromium and 8% nickel
B. 18% nickel and 8% chromium
C. 18% chromium and 8% gold
D. 8% gold and 18% palladium
Correct Answer: A
Question 93. Anchorage is:
A. Resistance to unwanted tooth movement
B. Resistance to wanted tooth movement
C. Resistance to both wanted and unwanted tooth movement
D. None of the above
Correct Answer: A
Question 94. Tooth movement most likely to relapse unless adequate retention is applied is:
A. Extrusion
B. Intrusion
C. Tipping
D. Rotation
Correct Answer: D
Question 95. Tongue blade is a simple device used for correction of:
A. Lip sucking
B. Finger sucking
C. Tongue thrusting
D. Incisor crossbite
Correct Answer: D
Question 96. The following is not a component of fixed appliance:
A. Bands
B. Brackets
C. Open coil spring
D. Adam’s clasp
Correct Answer: D
Question 97. The following is not a myofunctional appliance:
A. Activator
B. Begg’s appliance
C. Frankel
D. Oral screen
Correct Answer: B
Question 98. Face mask therapy is used to:
A. Push maxilla posteriorly
B. Pull maxilla anteriorly
C. Pull mandible anteriorly
D. None of the above
Correct Answer: B
Question 99. Which of the following condition should be treated as soon as it is seen?
A. Proclination
B. Crowding
C. Anterior tooth crossbite
D. Spacing
Correct Answer: C
Question 100. Intermaxillary elastics used in fixed orthodontics are worn:
A. In same arch
B. Between opposing arches
C. Only in maxilla
D. Only in mandible
Correct Answer: B
Question 101. Growth of condyle is by:
A. Membranous growth
B. Interstitial growth
C. Cartilaginous growth
D. Bony apposition
Correct Answer: C
Question 102. Spheno-occipital synchondrosis closes at the age of:
A. 6 years
B. Early puberty
C. Early adult age
D. It never closes
Correct Answer: C
Question 103. Incisal liability in maxillary arch is:
A. 7.6 mm
B. 5 mm
C. 1.7 mm
D. 3.2 mm
Correct Answer: A
Question 104. What would be the treatment choice for an adult with Class 2 skeletal malocclusion with recessive chin and normal maxilla?
A. Fixed orthodontics only
B. Functional appliance
C. Surgical orthodontics
D. All the above
Correct Answer: C
Question 105. Most common orofacial malformation producing malocclusion is:
A. Ectodermal dysplasia
B. Pierre Robin syndrome
C. Cleft lip and palate
D. Osteogenesis imperfecta
Correct Answer: C
Question 106. Mentalis muscle contraction causes lip to:
A. Retrude
B. Protrude
C. Inversion
D. Eversion
Correct Answer: B
Question 107. Normal nasolabial angle is:
A. 110°
B. 70°
C. 55°
D. 155°
Correct Answer: A
Question 108. Torsiversion refers to:
A. Change in inclination
B. Impaction of tooth
C. Change in position
D. Rotation around tooth axis
Correct Answer: D
Question 109. Surgery of cleft lip is advocated at:
A. 3 to 6 months
B. 3 years
C. 1 year
D. 9 months
Correct Answer: A
Question 110. Heavy forces on periodontal ligament cause:
A. Hyalinization
B. Gestalt bone reception
C. Osteoclastic activity around tooth
D. Osteoblastic activity
Correct Answer: A
Question 111. First diagnostic setup was given by:
A. Angle
B. Kesling
C. Tweed
D. None of the above
Correct Answer: B
Question 112. Normal value for FMA angle is:
A. 45°
B. 10°
C. 25°
D. 5°
Correct Answer: C
Question 113. Maxillary and mandibular incisor protrusion with spacing indicates:
A. Mouth breathing habit
B. Thumb sucking
C. Tongue thrusting
D. None of the above
Correct Answer: C
Question 114. Angle’s classification of malocclusion was given in which year?
A. 1899
B. 1999
C. 1909
D. None of the above
Correct Answer: A (Note: Angle’s classification is traditionally dated to 1899, correcting from original 1909)
Question 115. Which will exhibit more flexibility?
A. NiTi
B. TMA
C. Stainless steel
D. None of the above
Correct Answer: A
Question 116. If ANB angle is more than 4°, it indicates:
A. Class 1 malocclusion
B. Class 2 malocclusion
C. Class 3 malocclusion
D. None of the above
Correct Answer: B
Question 117. Timing for pubertal growth spurt in males is:
A. 7 to 9 years
B. 13 to 15 years
C. 15 to 18 years
D. Above 18 years
Correct Answer: B
Question 118. Which is the most stable landmark in cephalogram?
A. Sella
B. Nasion
C. Porion
D. Point A
Correct Answer: A
Question 119. The inclined plane is constructed:
A. 45° to occlusal plane
B. 70° to occlusal plane
C. 25° to occlusal plane
D. None of the above
Correct Answer: A
Question 120. After the mixed dentition stage, the arch length from the first molar to the first molar is usually:
A. Decreases
B. Increases
C. Remains same
D. None of the above
Correct Answer: A
Question 121. Which is the supplemental diagnostic aid?
A. Study casts
B. Facial photographs
C. Cephalogram
D. Clinical examination
Correct Answer: C
Question 122. Blanch test is used for the diagnosis of:
A. Pseudo class 3
B. Abnormal frenal attachment
C. Tongue thrusting
D. Thumb sucking
Correct Answer: B
Question 123. In mixed dentition, which of the following may be considered as a self-correcting problem with age?
A. Unilateral loss of primary canine
B. Lack of interdental spaces
C. Distal step
D. Open bite
Correct Answer: C
Question 124. Baker’s anchorage is a type of:
A. Intermaxillary anchorage
B. Intramaxillary anchorage
C. Extraoral anchorage
D. Skeletal anchorage
Correct Answer: A
Question 125. Total mandibular arch contained in the maxillary arch is:
A. Scissor bite
B. Cross bite
C. Deep bite
D. Reverse bite
Correct Answer: C
Question 126. Fishman’s index is used in relation with:
A. Population
B. Hand wrist radiograph
C. Cephalogram
D. Orthodontic treatment index
Correct Answer: B
Question 127. Which of the following tells about the maxillomandibular relationship?
A. SNA
B. SNB
C. IMPA
D. ANB
Correct Answer: D
Question 128. Which is an example of reciprocal anchorage?
A. Midline diastema correction
B. Using Class 2 elastics
C. Through the bite elastics
D. Both A and C
Correct Answer: D
Question 129. Which wire is called a shape memory wire?
A. Stainless steel wire
B. Multiflex wire
C. Nickel titanium wire
D. Coaxial wire
Correct Answer: C
Question 130. Optimum orthodontic force should not exceed the:
A. Arterial blood pressure
B. Venous blood pressure
C. Capillary blood pressure
D. Masticatory pressure
Correct Answer: C
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