Orthodontic 4
152. Clinical features of Class III Malocclusion ?
σ� Concave facial profile
σ� OJ increase
σ� Short mandible
σ� Facial more prominent
153. Treatment option of anterior open bite?
σ� Removable appliance with posterior bite plane
σ� Removable appliance with anterior bite plane
σ� Removable appliance with lower incline plane
σ� Removable appliance with Z spriong
154. The most comment reasons for relapse is?
σ� Rotation and spacing
σ� Good digitation
σ� Full unit class I,II,III
σ� Enough OB
155. The most comment risks of orthodontics tooth movement?
σ� Caries
σ� Root resorption
σ� Gingivitis
σ� Good digitation
156. Which components can correct Anterior Crossbite?
σ� upper inclined bite plane
σ� Removable appliance with Z spring and posterior bite plane
σ� Coffin spring
σ� Functional appliance
157. Which one is the best treatment for simple anterior cross bite
σ� Lower incline bite plane
σ� Orthognatic surgery
σ� Fixed appliance
σ� Functional appliance
If there is a lot of root resorption we should do?
σ� Stop activating appliance for at least 6 to 8 weeks and use a lighter force to move the teeth
σ� Use more forcr to move teeth
σ� Continue to apply heavy force
σ� Give some medicine
159. Which kind of treatment to correct skeletal feature of Class III in growth patients?
σ� Removable appliance
σ� Fixed appliance
σ� Functional appliance
σ� Orthognatic surgery
160. The clinical dental feature of Class III : ?
σ� Narrow upper arch with crowded
σ� Over jet increase
σ� Posterior cross bite
σ� Bimaxillary protrusion
161. Clinical feature of anterior open Bite: ?
σ� Long face
σ� Lips competent
σ� Deep bite
σ� Cross bite
162. In the following answers, which one is the best method to create space:?
σ� Extraction
σ� Distalize-molars
σ� Use coil spring to open space
σ� 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?
σ� Class I molar relationship
σ� Class II molar relationship
σ� Class III molar relationship
σ� Class I skeletal pattern
164. Lips incompetent most seen in cases?
σ� Cross bite
σ� Long upper lips
σ� Retroclined front teeth
σ� Class II division 1malocclusion
165. Adam Clasps ភាគច្រើនគេដាក់នៅលើធ្មេញណាមួយ?
σ� Strong and healthy teeth
σ� Big and painful teeth
σ� Deep caries teeth
σ� Periodontitis teeth
168. Choose the correct components for reduce overjet when the upper front teeth proclined and spacing?
σ� Z- spring
σ� Robert retractor
σ� Bucal canin retractor
σ� Finger spring
169. Which is the possible components for correcting posterior cross bite ?
σ� Z spring
σ� Labial bow
σ� Coffin spring
σ� Buccal canine retractor
170. តើចំលើយមួយណាសំរាបើ Expansion arch?
σ� Robert retractor
σ� Labial bow
σ� Adam clasp
σ� Screw expansion
171. Which Appliances can corrected anterior cross bite?
σ� Retainer
σ� Removable appliance with Z or T spring
σ� Functional appliance
σ� Removable appliance with finger spring
173. Which Active Component can be used as retention:?
σ� T-spring
σ� Z- spring
σ� Robert retractor
σ� Labial bow
175. Which one is the best components for correct # 11 cross bite?
σ� Palatal Z spring or T spring
σ� Posterior bite plane
σ� Anterior bite plane
σ� Robert retractor
176. Cross bite should be corrected immediately because it can cause:?
σ� Asymmetrical development of the jaw
σ� Crowding
σ� Spacing
σ� Root resorption
177. Which one is the cause of Anterior cross bite:?
σ� retained lower deciduous incisors
σ� premature contact/ pseudo class III
σ� Small lower arch and very broad Upper arch
σ� Missing lower teeth
178. Which one is the Clinical feature of Anterior cross bite: ?
σ� Reverse overjet
σ� Over jet > 7mm
σ� Small lower arch and very broad Upper arch
σ� Proclined upper incisors
185. The clinical feature of Class II division 1?
σ� Proclined upper incisors
σ� Overjet reduce
σ� ANB < 4degree
σ� Anterior Crossbite
186. Clinical feature of Class II division 2?
σ� Retroclined upper central Incisors with OJ reduce
σ� Overjet reverse
σ� OJ increase with proclined upper incisors
σ� Proclined upper incisors
188. When the OB is very deep what can we call?
σ� Traumatic bite
σ� Increased deep bite
σ� Excessive overbite
σ� open
189. What is the Keys of angle’s classification?
σ� 1st permanent molar (Molars relationship
σ� Incisors relationship
σ� Canine relation ship
σ� Class I canine relationship
190. For reduction of deep bite is done by?
σ� Posterior bite plane
σ� Anterior bite plane or reverse curve of spee
σ� Both anterior & posterior bite plane
σ� Labial bow with springs
192. When the maxillary teeth placed cover one side out and one side in of mandibular teeth called?
σ� Unilateral cross bite
σ� Scissors bite
σ� Bilateral cross bite
σ� Anterior cross bite
193. In case of class III malocclusion, the upper incisors are?
σ� Cross bite
σ� Retroclined
σ� OJ increase
σ� OB deep
194. In case of class II division 1 malocclusion lips are?
σ� Incompetent lips
σ� Competent
σ� Potentially competent
σ� Everted lips
195. Which Occlusal features are true in case of class II division 1 malocclusion?
σ� Overjet & overbite increased with open bite
σ� Overjet increased, overbite incomplete, unilateral crossbite
σ� Overjet increased but overbite reduced
σ� Over bite & over jet is zero
196. Main objective of class II division 1 treatment is ?
σ� The alignment & retraction of lower labial segment
Both arch alignment
σ� Alignment & retraction of upper labial segment
Extraction of upper 4 to improve the aesthetics & the function of the teeth & jaws
197. What is the Malocclusion means?
σ� Normal alignment of teeth
σ� Irregularities of teeth
σ� aligned teeth
σ� good digitation
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