Pt3 121-180/Orthodontic II
121. In class I malocclusion over jet?
Normal
Increased
Decreased
Reversed
123. The clinical feature of tongue thrust is?
reduce over jet
Proclined of anterior teeth in both arch
Anterior cross bite
Crowding
124. Orthodontic treatment of crowding combing with?
Extraction
Making crowd
Maintain teeth
Stripping
125. Which example is correct for contraindication of bite plane ?
Low FMA cases
Increased lower facial height cases
Deep bite cases
Cuspal interference
126. Rapid maxillary expansion is also known as?
Distalization
Rapid palatal expansion
Reproximation Split palate
Slenderization
127. Which malocclusion is the most likely fracture of teeth front teeth?
Class II div1.
Class I.
Class II div.2.
Class III
128. In class I malocclusion which is the most comment seen?
Anterior Crossbite
Increase OJ
Rotation and crowding
Deep bite
129. Soft tissue profile of a class III patient is?
Convex
Concave
Point A is ahead
N Point is ahead
130. Rapid maxillary expansion (RME)is indicated in case of?
Small maxillary
Large maxillary
Short mandible
Long mandible
131. A very high tongue in the roof of the mouth may causes ?
Cross bite
Crowding
Median diastema
Wide upper arch & narrow lower arch
132. Which one of class I dental base with bacward rotation may cause ?
Proclination of upper incisors
Incomplete overbite
Open bite
Increased overjet
Cross bite
133. The overlapping of the upper interior teeth over the lowers in the vertical plane is call?
Overjet
Overbite
Openbite
Cross bite
134. In the condition that describe the a malposed labiolingual relationship between one or more maxillary and mandibular teeth is call?
Cross bite
Deep bite
Open bite
Scissor bite
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?
Anterior cross bite
Posterior Crossbite
Unilateral cross bite
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?
Spacing
Crowding
Well align
Submerge
139. Which one is the main dental cause of posterior cross bite?
Excessive abnormal mandibular growth lateraly
Prolong thumb or finger sucking
Occlusal interference
Cleft lips repair
141. Which clinical feature of anterior open bite?
LFH reduce
Anterior teeth are not overlaps
Anterior teeth are deep overlaps
short face
143. Which one is the best treatment for deep bite with gummy smile?
Extrude molars
Intrude incisors
Extrude molars and intrude incisors
Extraction molars
144. When do we have to do extrude molars for deep bite cases?
Long face
LFH increase
LFH reduce
Open bite case
145. មូលហេតុអ្វីដែលធ្វើអោយមាន Root resorption?
Good oral hygiene
Light force
Heavy force
Tipping movement
146. Choose the correct answer of Clinical feature of Class II division1 malocclusion?
OJ decrease
OJ increase with Proclined front teeth
Competent lips
Anterior cross bite
147. Which is the indication of buccal canine eruption to do extraction 1st PM ?
Mesially inclined canines
Pallataly eruption
Impacted canine
Transposition
148. Abnormal tooth mobility is because?
Used light force.
Appliance worn full-time
Abnormal resorption of the root e.g. In periodontal disease
Good oral hygiene
152. Clinical features of Class III Malocclusion ?
Concave facial profile
OJ increase
Short mandible
Facial more prominent
153. Treatment option of anterior open bite?
Removable appliance with posterior bite plane
Removable appliance with anterior bite plane
Removable appliance with lower incline plane
Removable appliance with Z spriong
154. The most comment reasons for relapse is?
Rotation and spacing
Good digitation
Full unit class I,II,III
Enough OB
155. The most comment risks of orthodontics tooth movement?
Caries
Root resorption
Gingivitis
Good digitation
156. Which components can correct Anterior Crossbite?
upper inclined bite plane
Removable appliance with Z spring and posterior bite plane
Coffin spring
Functional appliance
157. Which one is the best treatment for simple anterior cross bite?
Lower incline bite plane
Orthognatic surgery
Fixed appliance
Functional appliance
158. If there is a lot of root resorption we should do?
Stop activating appliance for at least 6 to 8 weeks and use a lighter force to move the teeth
Use more forcr to move teeth.
Continue to apply heavy force
Give some medicine
159. Which kind of treatment to correct skeletal feature of Class III in growth patients?
Removable appliance
Fixed appliance
Functional appliance
Orthognatic surgery
160. The clinical dental feature of Class III : ?
Narrow upper arch with crowded
Over jet increase
Posterior cross bite
Bimaxillary protrusion
162. In the following answers, which one is the best method to create space:?
Extraction
Distalize-molars
Use coil spring to open space
Proclined teeth
163. When mesio-buccal cusp of upper first permanent molar occluding forward of the buccal groove of the lower first permanent molar is call?
Class I molar relationship
Class II molar relationship
Class III molar relationship
Class I skeletal pattern
164. Lips incompetent most seen in cases?
Cross bite
Long upper lips
Retroclined front teeth
Class II division 1malocclusion
165. Adam Clasps ភាគច្រើនគេដាក់នៅលើធ្មេញណាមួយ?
Strong and healthy teeth
Big and painful teeth
Deep caries teeth
Periodontitis teeth
168. Choose the correct components for reduce overjet when the upper front teeth proclined and spacing?
Z- spring
Robert retractor
Bucal canin retractor
Finger spring
169. Which is the possible components for correcting posterior cross bite ?
Z spring
Labial bow
Coffin spring
Buccal canine retractor
171. Which Appliances can corrected anterior cross bite?
Retainer
Removable appliance with Z or T spring
Functional appliance
Removable appliance with finger spring
173. Which Active Component can be used as retention:?
T-spring
Z- spring
Robert retractor
Labial bow
175. Which one is the best components for correct # 11 cross bite?
Palatal Z spring or T spring
Posterior bite plane
Anterior bite plane
Robert retractor
176. Cross bite should be corrected immediately because it can cause:?
Asymmetrical development of the jaw
Crowding
Spacing
Root resorption
177. Which one is the cause of Anterior cross bite:?
retained lower deciduous incisors
premature contact/ pseudo class III
Small lower arch and very broad Upper arch
Missing lower teeth
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