Orthodontic 3
101. In case of class III malocclusion, the upper incisors are ?
σ� Proclined
σ� Retroclined
σ� Spaced
σ� Rotated
102. In case of class II division 1 malocclusion lips are ?
Incompetent
σ� Competent
σ� Potentially competent
Lower lip line is usually low & upper lip is short
103. Clinical features in case of class II division 1 malocclusion?
Overjet increased with retroclined
σ� Overjet increased, overbite incomplete, incompetent lips
Overjet decrease but overbite reduced
σ� Over bite & over jet decrease
104. Main objective of class II division 1 treatment is ?
The alignment & retraction of lower labial segment
Both arch alignment
σ� Reduce OJ and correct oclusion
Extraction of 4’s to improve the aesthetics & the function of the teeth & jaws
105. Malocclusion means ?
σ� Normal alignment of teeth
σ� Irregularities of teeth
σ� Misaligned teeth with traumatic bite
σ� open bite
106. In case of class II division 2 malocclusion closing space is ?
σ� Easy
σ� Difficult
σ� Medium
σ� Quick
107. Lower incisor traumatic in palate, it’s called?
σ� Traumatic bite
σ� Open bite
σ� Excessive overbite
σ� Deep bite
108. Which one is Angle’s classification of malocclusion?
σ� Molars relationship
σ� Incisors relationship
σ� Canine relationship
σ� Premolars relationship
109. Which one is clinical feature of class II division 2 malocclusion ?
σ� Open Bite
σ� Unilateral Crossbite
σ� Deep Bite
σ� Incomplete over bite
111. When the maxillary and mandibular teeth can not occlude together called
σ� Cross bite
σ� Sicissors bite
σ� Deep bite
σ� Open bite
112. In Class II div 2 malocclusion cases?
σ� Overjet normal
σ� Overjet is reduced
σ� Overjet is increased
σ� Overjet proclined
113. Main objective of class II division 1 treatment is –?
σ� The alignment & retraction of lower labial segment
σ� Both arch alignment
σ� Alignment & retraction of upper labial segment
σ� Extraction of 4/ 4 to improve the aesthetics & the function of the teeth & jaws
115. If dental base is short & 8 /8 present, for distal movement of 6 /6, what will you do?
σ� 4/ 4 & 5 5 extraction
σ� 7/ 7 extraction
σ� 8 /8 extraction
σ� Only 4/ 4 extraction
116. In severe skeletal discrepancy of class II division 2 malocclusion, which one is the best treatment is done?
σ� Removable appliance
σ� Myofunctional appliance
σ� Fixed appliance
σ� Orthognatic surgery
117. In class II div 2 malocclusion, the upper incisors are?
σ� Retroclined
σ� Proclined
σ� Upright
Rotated
118. What is over bite?
σ� Vertical overlapping of upper & lower anterior
σ� horizontal overlapping
σ� Lack of vertical overlapping
σ� Open bite
119. When the maxillary back teeth placed inside of mandibular teeth only one side called?
σ� Anterior cross bite
σ� Unilateral cross bite
σ� Deep bite
σ� Bilateral cross bite
120. Which clinical feature we can see anterior cross bite?
σ� Broad maxillary
σ� Short mandible
σ� Class II division 2 malocclusion
σ� Skeletal III
122. Midline shift can causes by?
σ� Premature contact
σ� True cross bite
σ� Thumb sucking
σ� Tongue thrusting
123. The clinical feature of tongue thrust is?
σ� reduce over jet
σ� Proclined of anterior teeth in both arch
σ� Anterior cross bite
σ� Crowding
124. Orthodontic treatment of crowding combing with?
σ� Extraction
σ� Making crowd
σ� Maintain teeth
σ� Stripping
125. Which example is correct for contraindication of bite plane ?
σ� Low FMA cases
σ� Increased lower facial height cases
σ� Deep bite cases
σ� Cuspal interference
126. Rapid maxillary expansion is also known as?
σ� Distalization
σ� Rapid palatal expansion
σ� Reproximation Split palate
σ� Slenderization
127. Which malocclusion is the most likely fracture of teeth front teeth?
σ� Class II div1.
Class I.
σ� Class II div.2.
σ� Class III
128. In class I malocclusion which is the most comment seen?
σ� Anterior Crossbite
σ� Increase OJ
σ� Rotation and crowding
σ� Deep bite
129. Soft tissue profile of a class III patient is?
σ� Convex
Concave
σ� Point A is ahead
σ� N Point is ahead
130. Rapid maxillary expansion (RME)is indicated in case of?
σ� Small maxillary
σ� Large maxillary
σ� Short mandible
σ� Long mandible
131. A very high tongue in the roof of the mouth may causes ?
σ� Cross bite
σ� Crowding
Median diastema
σ� Wide upper arch & narrow lower arch
132. Which one of class I dental base with bacward rotation may cause ?
σ� Proclination of upper incisors
σ� Incomplete overbite
σ� Open bite
σ� Increased overjet
σ� Cross bite
133. The overlapping of the upper interior teeth over the lowers in the vertical plane is call?
σ� Overjet
σ� Overbite
σ� Openbite
σ� Cross bite
134. In the condition that describe the a malposed labiolingual relationship between one or more maxillary and mandibular teeth is call?
σ� Cross bite
σ� Deep bite
σ� Open bite
σ� Scissor bite
136. Which one is match with anterior cross bite?
σ� OJ reduce
σ� OJ increase
σ� OJ average
σ� OJ Reverse
137. A 16 years old boy come to orthodontic clinic for checking his crocket teeth. After fulfill requirement orthodontist can find many problems ; some of his left side teeth are cross bite and the midline is shift to the left , what is the more likely diagnosis of this issue?
σ� Anterior cross bite
σ� Posterior Crossbite
σ� Unilateral cross bite
σ� Bilateral cross bite
138. A 12 years old girl comes to orthodontic clinic for checking her teeth. After fulfill requirement (examination, X-ray, Models) orthodontist can find many problems; some of her front teeth are crocket and cross bite, what is the more likely diagnosis of this issue?
σ� Spacing
σ� Crowding
σ� Well align
σ� Submerge
139. Which one is the main dental cause of posterior cross bite?
σ� Excessive abnormal mandibular growth lateraly
σ� Prolong thumb or finger sucking
σ� Occlusal interference
σ� Cleft lips repair
141. Which clinical feature of anterior open bite?
σ� LFH reduce
σ� Anterior teeth are not overlaps
σ� Anterior teeth are deep overlaps
σ� short face
143. Which one is the best treatment for deep bite with gummy smile?
σ� Extrude molars
σ� Intrude incisors
σ� Extrude molars and intrude incisors
σ� Extraction molars
144. When do we have to do extrude molars for deep bite cases?
σ� Long face
σ� LFH increase
σ� LFH reduce
σ� Open bite case
145. មូលហេតុអ្វីដែលធ្វើអោយមាន Root resorption?
σ� Good oral hygiene
σ� Light force
σ� Heavy force
σ� Tipping movement
146. Choose the correct answer of Clinical feature of Class II division1 malocclusion?
σ� OJ decrease
σ� OJ increase with Proclined front teeth
σ� Competent lips
σ� Anterior cross bite
147. Which is the indication of buccal canine eruption to do extraction 1st PM ?
σ� Mesially inclined canines
σ� Pallataly eruption
σ� Impacted canine
σ� Transposition
148. Abnormal tooth mobility is because?
σ� Used light force
σ� Appliance worn full-time
σ� Abnormal resorption of the root e.g. In periodontal disease
σ� Good oral hygiene
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