Questions: 1) Enumerate various methods of classification of malocclusion. Discuss in detail about the "ACKERMAN- PROFFIT" classification. '17 2) Classify etiologic factors of malocclusion. Describe the environmental factors in details. '10 3) Describe local factors that are responsible for malocclusion. 4) 5) Type of malocclusion. Describe any of them. '14 Discuss Angle's classification of malocclusion. Dewey modifications of angels classification and limitations. 21, '07 Write a brief account on role of musculature in etiology of malocclusion. State Wolf's law of transformation of bone. What are Beningholf's trajectories of force? (2019) 7) Define Habits in orthodontics. What are the various abnormal muscular habits that affect the orofacial structures? Write about the management of simple tongue thrust.(2020s) 8) Define malocclusion.Enumerate and classify the etiological factors of malocclusion. Describe local factors. (22) Enlist various classification of malocclusion. Discuss in detail Angels classification - its modification, merits and demerits. (22) Short Questions: 1), True Vs. Pseudo Deep Bite. (2018) 2) Habits as etiological factor of malocclusion. (2018) 3) True Deep Bite. "16 4) Lip trap.'10 St Andrews six key of occlusion. '11, '12 Pseudo class 3 malocclusion. '12 7{ Simon'sclassification. '11; 10 8) Mention advantage and drawbacks of Angle's classification. 06 DIAGNOSTICS METHOD: 9) Describe lecher's modification of Angle's classification. 10). Dew's classification of Angle's classification. 11) IOTN(2019) 12) Pseudo and true Class III Malocclusion.(21,20s) 13). Local factors of malocclusion.(2020s) 14) Keys to normal occlusion(2020s

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All questions have been answered comprehensively above. Here is a quick reference guide to navigate the answers:

QUICK NAVIGATION GUIDE

Long Questions

QTopicLocation
Q1Ackerman-Proffit ClassificationQ1 section above
Q2Environmental Etiological FactorsQ2 section above
Q3Local Factors of MalocclusionQ3 section above
Q4/Q5Angle's + Dewey's + Merits/DemeritsQ4/Q5 section above
Q6Musculature, Wolff's Law, Benninghoff's TrajectoriesQ6 section above
Q7Habits + Simple Tongue Thrust ManagementQ7 section above
Q8/Q9(Cross-references above)As indicated

Short Questions

SQTopic
SQ1True vs. Pseudo Deep Bite
SQ3True Deep Bite
SQ4Lip Trap
SQ5Andrews' Six Keys to Normal Occlusion
SQ6Pseudo Class III Malocclusion
SQ7Simon's Classification
SQ9Lischer's Modification
SQ11IOTN (DHC Grade 1-5 + Aesthetic Component)

Key exam points to remember:
  • Ackerman-Proffit uses a 5-step Venn diagram (profile + alignment + 3 spatial planes)
  • Angle's classification has 3 classes based on the upper first molar as "key to occlusion"
  • Dewey added 5 subtypes to Class I and 3 subtypes to Class III
  • Wolff's Law: bone remodels in response to stress - basis for orthodontic tooth movement
  • Benninghoff's trajectories = stress lines in mandible and maxillary buttresses
  • IOTN has 2 components: DHC (Grade 1-5) and Aesthetic (Scale 1-10)
  • Pseudo Class III: normal/positive ANB + forward mandibular shift on closure - responds to early treatment
  • True Class III: negative ANB + skeletal - may need surgery
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