Questions and Answers
Who is considered the father of modern orthodontics and was the first to classify malocclusion?
Edward Angle
What is Class I or neutrocclusion?
The MB of the maxillary first molar occludes with the MB groove of the mandibular first molar.
What describes Class I canine relationship?
Maxillary occludes with distal half of the mandibular canine and mesial half of the mandibular first premolar.
What is Class II or distocclusion?
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What characterizes Class II division 1?
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What does retrognatic refer to?
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What is Class II division 2?
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What defines Class II molar relationship?
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What describes Class III mesioocclusion?
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What is Class III canine relationship?
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What does prognathic refer to?
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Class I classification is defined as _____.
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Class II classification is defined as _____.
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Class II division 1 classification is defined as _____.
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Class II division 2 classification is defined as _____.
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Class III figure classification is defined as _____.
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What is true Class III malocclusion?
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What is pseudo Class III?
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Study Notes
Edward Angle
- Known as the father of modern orthodontics.
- First individual to classify malocclusion.
Class I or Neutrocclusion
- Maxillary first molar's mesiobuccal (MB) cusp occludes with the MB groove of the mandibular first molar.
Class I Canine Relationship
- Maxillary canine occludes with the distal half of the mandibular canine and the mesial half of the mandibular first premolar.
Class II or Distocclusion
- Maxillary first molar is positioned even with or posterior to the mandibular first molar.
- The buccal aspect of the mandibular first molar is distal to the mesiobuccal cusp of the maxillary first molar.
Class II Division 1
- Molar relationship resembles Class II.
- Permanent maxillary central incisors are slightly protruded or exhibit a large overjet.
Retrognathic
- Characterized by a convex face profile.
- Results from a small mandible or an oversized maxilla.
Class II Division 2
- Molar relationships are Class II.
- Maxillary central incisors are retroclined.
- Maxillary lateral incisors may be proclined or normally inclined, with a deep bite present.
Class II Molar Relationship
- Mesiobuccal (MB) cusp of the maxillary first molar occludes with the mandibular first molar.
Class III or Mesioocclusion
- Mesiobuccal cusp of maxillary first permanent molar occludes distally to the mesiobuccal groove of the mandibular first molar.
Class III Canine Relationship
- Distal surface of the mandibular canines is mesial to the mesial surface of the maxillary canines by at least the width of a premolar.
- Mandibular incisors are in complete crossbite.
Prognathic
- Concave face profile associated with Class III malocclusion.
- Characterized by a prominent mandible.
True Class III Malocclusion
- Skeletal in nature and often genetically predisposed.
- Results from an excessively large mandible or a smaller-than-normal maxilla.
Pseudo Class III
- False or postural malocclusion.
- Occurs when the mandible shifts anteriorly during the final stages of closure, often due to premature contact of incisors or canines.
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Description
Explore the fundamental concepts of orthodontics with a focus on malocclusion classifications established by Edward Angle. This quiz covers Class I, Class II, and their subdivisions, helping you understand the intricacies of dental alignment. Perfect for students and professionals in the field of dentistry.
