Orthodontic 3
101. In case of class III malocclusion, the upper incisors are ?
σ¾ Proclined
σ½ Retroclined
σ½ Spaced
σ½ Rotated
102. In case of class II division 1 malocclusion lips are ?
Incompetent
σ½ Competent
σ½ 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
σ¾ Overjet increased, overbite incomplete, incompetent lips
Overjet decrease but overbite reduced
σ½ 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
σ¾ Reduce OJ and correct oclusion
Extraction of 4’s to improve the aesthetics & the function of the teeth & jaws
105. Malocclusion means ?
σ½ Normal alignment of teeth
σ¾ Irregularities of teeth
σ½ Misaligned teeth with traumatic bite
σ½ open bite
106. In case of class II division 2 malocclusion closing space is ?
σ½ Easy
σ¾ Difficult
σ½ Medium
σ½ Quick
107. Lower incisor traumatic in palate, it’s called?
σ¾ Traumatic bite
σ½ Open bite
σ½ Excessive overbite
σ½ Deep bite
108. Which one is Angle’s classification of malocclusion?
σ¾ Molars relationship
σ½ Incisors relationship
σ½ Canine relationship
σ½ Premolars relationship
109. Which one is clinical feature of class II division 2 malocclusion ?
σ½ Open Bite
σ½ Unilateral Crossbite
σ¾ Deep Bite
σ½ Incomplete over bite
111. When the maxillary and mandibular teeth can not occlude together called
σ½ Cross bite
σ½ Sicissors bite
σ½ Deep bite
σ¾ Open bite
112. In Class II div 2 malocclusion cases?
σ½ Overjet normal
σ¾ Overjet is reduced
σ½ Overjet is increased
σ½ Overjet proclined
113. Main objective of class II division 1 treatment is –?
σ½ The alignment & retraction of lower labial segment
σ½ Both arch alignment
σ¾ Alignment & retraction of upper labial segment
σ½ 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?
σ½ 4/ 4 & 5 5 extraction
σ¾ 7/ 7 extraction
σ½ 8 /8 extraction
σ½ Only 4/ 4 extraction
116. In severe skeletal discrepancy of class II division 2 malocclusion, which one is the best treatment is done?
σ½ Removable appliance
σ½ Myofunctional appliance
σ½ Fixed appliance
σ¾ Orthognatic surgery
117. In class II div 2 malocclusion, the upper incisors are?
σ¾ Retroclined
σ½ Proclined
σ½ Upright
Rotated
118. What is over bite?
σ¾ Vertical overlapping of upper & lower anterior
σ½ horizontal overlapping
σ½ Lack of vertical overlapping
σ½ Open bite
119. When the maxillary back teeth placed inside of mandibular teeth only one side called?
σ½ Anterior cross bite
σ¾ Unilateral cross bite
σ½ Deep bite
σ½ Bilateral cross bite
120. Which clinical feature we can see anterior cross bite?
σ½ Broad maxillary
σ½ Short mandible
σ½ Class II division 2 malocclusion
σ¾ Skeletal III
122. Midline shift can causes by?
σ¾ Premature contact
σ½ True cross bite
σ½ Thumb sucking
σ½ Tongue thrusting
123. The clinical feature of tongue thrust is?
σ½ reduce over jet
σ¾ Proclined of anterior teeth in both arch
σ½ Anterior cross bite
σ½ Crowding
124. Orthodontic treatment of crowding combing with?
σ¾ Extraction
σ½ Making crowd
σ½ Maintain teeth
σ½ Stripping
125. Which example is correct for contraindication of bite plane ?
σ½ Low FMA cases
σ¾ Increased lower facial height cases
σ½ Deep bite cases
σ½ Cuspal interference
126. Rapid maxillary expansion is also known as?
σ½ Distalization
σ¾ Rapid palatal expansion
σ½ Reproximation Split palate
σ½ Slenderization
127. Which malocclusion is the most likely fracture of teeth front teeth?
σ¾ Class II div1.
Class I.
σ½ Class II div.2.
σ½ Class III
128. In class I malocclusion which is the most comment seen?
σ½ Anterior Crossbite
σ½ Increase OJ
σ¾ Rotation and crowding
σ½ Deep bite
129. Soft tissue profile of a class III patient is?
σ½ Convex
Concave
σ½ Point A is ahead
σ½ N Point is ahead
130. Rapid maxillary expansion (RME)is indicated in case of?
σ¾ Small maxillary
σ½ Large maxillary
σ½ Short mandible
σ½ Long mandible
131. A very high tongue in the roof of the mouth may causes ?
σ½ Cross bite
σ½ Crowding
Median diastema
σ¾ Wide upper arch & narrow lower arch
132. Which one of class I dental base with bacward rotation may cause ?
σ½ Proclination of upper incisors
σ½ Incomplete overbite
σ¾ Open bite
σ½ Increased overjet
σ½ Cross bite
133. The overlapping of the upper interior teeth over the lowers in the vertical plane is call?
σ½ Overjet
σ¾ Overbite
σ½ Openbite
σ½ Cross bite
134. In the condition that describe the a malposed labiolingual relationship between one or more maxillary and mandibular teeth is call?
σ¾ Cross bite
σ½ Deep bite
σ½ Open bite
σ½ Scissor bite
136. Which one is match with anterior cross bite?
σ½ OJ reduce
σ½ OJ increase
σ½ OJ average
σ¾ 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?
σ½ Anterior cross bite
σ½ Posterior Crossbite
σ¾ Unilateral cross bite
σ½ 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?
σ½ Spacing
σ¾ Crowding
σ½ Well align
σ½ Submerge
139. Which one is the main dental cause of posterior cross bite?
σ½ Excessive abnormal mandibular growth lateraly
σ¾ Prolong thumb or finger sucking
σ½ Occlusal interference
σ½ Cleft lips repair
141. Which clinical feature of anterior open bite?
σ½ LFH reduce
σ¾ Anterior teeth are not overlaps
σ½ Anterior teeth are deep overlaps
σ½ short face
143. Which one is the best treatment for deep bite with gummy smile?
σ½ Extrude molars
σ¾ Intrude incisors
σ½ Extrude molars and intrude incisors
σ½ Extraction molars
144. When do we have to do extrude molars for deep bite cases?
σ½ Long face
σ½ LFH increase
σ¾ LFH reduce
σ½ Open bite case
145. មូលហáŸážáž»áž¢áŸ’វីដែលធ្វើអោយមាន Root resorption?
σ½ Good oral hygiene
σ½ Light force
σ¾ Heavy force
σ½ Tipping movement
146. Choose the correct answer of Clinical feature of Class II division1 malocclusion?
σ½ OJ decrease
σ¾ OJ increase with Proclined front teeth
σ½ Competent lips
σ½ Anterior cross bite
147. Which is the indication of buccal canine eruption to do extraction 1st PM ?
σ¾ Mesially inclined canines
σ½ Pallataly eruption
σ½ Impacted canine
σ½ Transposition
148. Abnormal tooth mobility is because?
σ½ Used light force
σ½ Appliance worn full-time
σ¾ Abnormal resorption of the root e.g. In periodontal disease
σ½ Good oral hygiene
149. Tooth pain when we move it because?
σ¾ Too much forces
σ½ Tooth move
σ½ bone lost
σ½ gingivitis
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