Ortho mey phoung 121-180

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Orthodontic Knowledge Quiz

Test your understanding of orthodontic concepts and principles with our comprehensive quiz designed for students, teachers, and orthodontic enthusiasts alike.

Challenge yourself with questions covering:

Skeletal relationships
Tooth eruption patterns
Orthodontic appliances
Treatment approaches

60 Questions15 MinutesCreated by BrushingClinics202

121. A 12 years old boy with class II incisors relationship when upper incisor are procline (overjet= 11 mm ) and the teeth in both arches are well aligned combined with skeletal II base by the normal maxilla when the mandible in retrusive, how can manage this patient ?

122. Why the lower inclined bite plane was indicated ?

σ� Cheap

σ� Easy to produce

σ� Poor prognosis of all the teeth in buccal segment both side

σ� No areas for retention at the buccal teeth

σ� All are related

125. Class II Skeletal base mean ?

σ� When the maxilla protrusive and mandible normal

σ� When the maxilla protrusive and the mandible retrusive

σ� When the mandible retrusive and the maxilla normal

σ� All are related

σ� All unrelated

126. Class III Skeletal base mean ?

σ� When the maxilla retrusive and mandible normal

σ� When the maxilla retrusive and mandible protrusive

σ� When the maxilla normal and mandible protrusive

σ� All are related

σ� All unrelared

131. A line that drop perpendicular at the distal surface of Upper and lower E’s was known ?

132. The Lee way space of the upper arch is ?

σ� Greater than the Lower arch

σ� Smaller than the Lower arch

σ� Lee way space are the same

σ� Lee way space upper arch is narrow

σ� All unrelated

133. When the child was 6 to 8 years old what can you see the permanent teeth had erupted ?

134. When the first permanent molar was extracted, what’s happened in this area ?

σ� The second permanent molar tilt mesially

σ� The second permanent molar tilt distally

σ� The second permanent molar extruded

σ� The second permanent molar intruded

σ� All are related

135. What’s happened when loss of the lower first permanent molar ?

σ� The lower second premolar tilt distally

σ� The lower second permanent molar tilt mesially

σ� The upper first permanent molar extruded

σ� The contact points in this area are displaced

σ� All are related

137. When the upper second permanent molar make the extraction decision, what would we check ?

σ� Check the upper third molar

σ� Check the degree of crowding

σ� Check the distance for distalization

σ� All are related

σ� All unrelated

138. What should you do when the second premolars were absent ?

139. When the first permanent molar was extracted what’s happened in this area ?

σ� The second premolar drifted and tilted mesially

σ� The second permanent molar drifted and tilted distally

σ� The space in this area were created

σ� The teeth are good alignment in their ache

σ� All unrelated

140. What is the flush terminal plane ?

σ� When the distal surface of upper and lower first permanent molars are in the line each other

σ� When the distal surface of upper and lower second permanent molars are in the line each other

σ� When the distal surface of upper and lower first deciduous molars are in the line each other

σ� When the distal surface of upper and lower second deciduous molars are in the line each other

σ� All unrelated

141. The spacing distal to the lower deciduous canines and mesial to the upper deciduous canine the so-called ?

142. Change in proportion of the head and face during growth ?

144. Growth can helps to facilitate relevant to orthodontic treatment ?

145. During the pubertal growth spurt what appliance is the best used ?

147. Anomalies in form of teeth during eruption ?

148. What cause of dilacerations during eruption of permanent central incisor ?

149. What problem when permanent lateral incisors are missing ?

150. What a problem when permanent third molars are missing ?

151. What treatment options when permanent lateral incisors are missing ?

σ� create space for implants

σ� Preserve space with bridges

σ� preserve space with partial denture

σ� Closing space and shape 3 to look like 2

σ� All are related

152. Premature loss of deciduous teeth, when the C and D in unilateral loss cause ?

σ� Midline shift to the side of extraction

σ� The first permanent molars drift distally

σ� The E’s drift backwards

σ� All are related

σ� All unrelated

153. Premature loss of deciduous teeth, when the C and D in bilateral loss cause ?

σ� The first permanent molars and the E’s to drift forwards

σ� The first permanent molars and the E’s are rotated

σ� The first permanent molars and the E’s are tilting

σ� All are related

σ� All unrelated

154. Premature loss of deciduous teeth, when the E is extracted before 6 erupts ?

σ� The 6 will erupts more towards the mesial entering the premolar areas

σ� Loss of space in the arch for the premolar erupts

σ� Midline shift to the extraction side

σ� All are related

σ� All unrelated

155. Premature loss of deciduous teeth, when the E is extracted after 6 has erupted ?

156. The early loss of deciduous teeth would cause ?

157. Treatment of early loss of deciduous teeth, balancing extraction is needed if ?

σ� The C or D is decay

σ� The C or D is missing unilaterally

σ� The C or D has crown fracture

σ� The C or D has restoration

σ� All unrelated

158. Treatment of early loss of deciduous teeth, space maintainer is can be used if ?

159. Examination and Diagnosis in family and social history related to ?

σ� Hereditary factor

σ� Do they understandwhat orthodontic treatment involves

σ� How far they live

σ� Can they come regurlary

σ� All are related

161. Excessive lower face height may be the cause of ?

162. The inclination of mandibular plane to the true horizontal or Franfort plane should be note ?

σ� A steep mandibular plane angle correlates with long anterior face height

σ� Anterior open bite malocclusion

σ� A flat mandibular plane angle correlates with short anterior face height

σ� Deep bite malocclusion

σ� All are related

163. The line joining the tip of the nose to the chin was called a Ricketts E- Line or Aesthetic Line in Normative value for the Chinese Norm is ?

164. The ideally of the lip line at rest position the lower lip cover between?

σ� ⅓ or ½ of the labial surface of the upper central incisor

σ� ¾ of the labial surface of the upper central incisor

σ� ⅔ of the labial surface of the upper central incisor

σ� ⅝ of the labial surface of the upper central incisor

σ� All unrelated

165. Check the soft tissue in clinical examination in extra-oral of the lip was found ?

166. Clinical examination of intra-oral in the labial segment was checked and found ?

167. What we can see the overbite after intra-oral examination ?

168. The amount of anchorage required depend on the factor below?

σ� The number of teeth to be move

σ� The distance of teeth need to be move

σ� Force applied

σ� Root surface areas (RSA) of the teeth used for anchorage

σ� All are related

169. Which one the following types of anchorage for orthodontic treatment ?

170. How to minimize anchorage loss for the tooth movement ?

σ� Use force as light as possible

σ� Move minimum number of teeth at one time

σ� Increase the resistance of anchor teeth

σ� All are related

σ� All unrelated

171. The factors determining of the anchorage value ?

172. Frankfort Horizontal is a reference plane constructed by joining which of the following landmarks ?

173. The FMPA Angle was recognized and constructed by ?

σ� Frankfort to maxillary plane

σ� Frankfort to mandibular plane

σ� Frankfort to horizontal plane

σ� Frankfort to occlusal plane

σ� Frankfort to SN plane

174. The Molar relationship class II was known as the mesio-buccal cusp of the upper first permanent molar occlude to the lower first permanent molar at ?

σ� The mesio-buccal groove

σ� The distal-buccal groove

σ� The distal of mesio-buccal groove

σ� The mesial of mesio-buccal groove

σ� Unrelated

175. In determining a patient's skeletal growth pattern, the most important factor is ?

176. The last primary tooth to be replaced by a permanent tooth is usually the ?

178. A child at 5-6 years with molar class II, later stage the first molar become class I. The causes of the leeway space in ?

179. The malocclusion cause by thumb sucking

180. Screw expansion should be turned for a week ?

Ortho mey phoung 121-180

Orthodontic Knowledge Quiz

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