NEET MDS Orthodontics Syllabus

Orthodontics syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Orthodontics in NEET MDS, not a summary of it.

1. 1

   Introduction to Orthodontics

   2 topics

   • History of Orthodontics
     • Early Developments
     • Modern Orthodontics
   • Scope and Objectives
     • Preventive Orthodontics
     • Interceptive Orthodontics
     • Corrective Orthodontics
2. 2

   Growth and Development

   2 topics

   • Craniofacial Growth
     • Prenatal Growth
     • Postnatal Growth
     • Growth Spurts
   • Dental Development
     • Tooth Eruption
     • Dental Age Assessment
3. 3

   Diagnosis and Treatment Planning

   4 topics

   • Clinical Examination
     • Extraoral Examination
     • Intraoral Examination
   • Diagnostic Records
     • Photographs
     • Radiographs
     • Study Models
   • Cephalometrics
     • Cephalometric Landmarks
     • Cephalometric Analysis
   • Treatment Planning
     • Problem List
     • Treatment Objectives
     • Treatment Options
4. 4

   Orthodontic Appliances

   3 topics

   • Removable Appliances
     • Components
     • Indications
     • Limitations
   • Fixed Appliances
     • Brackets and Bands
     • Archwires
     • Auxiliaries
   • Functional Appliances
     • Types of Functional Appliances
     • Mechanism of Action
     • Clinical Applications
5. 5

   Biomechanics in Orthodontics

   3 topics

   • Basic Principles
     • Force Systems
     • Center of Resistance
     • Center of Rotation
   • Tooth Movement
     • Biological Response
     • Types of Tooth Movement
   • Anchorage Control
     • Types of Anchorage
     • Methods of Reinforcement
6. 6

   Malocclusion

   3 topics

   • Classification of Malocclusion
     • Angle's Classification
     • Skeletal Classification
   • Etiology of Malocclusion
     • Genetic Factors
     • Environmental Factors
   • Management of Malocclusion
     • Early Treatment
     • Comprehensive Treatment
7. 7

   Orthodontic Treatment in Adults

   2 topics

   • Differences from Adolescent Treatment
     • Growth Considerations
     • Periodontal Health
   • Interdisciplinary Treatment
     • Orthodontic-Restorative
     • Orthodontic-Periodontic
     • Orthodontic-Surgical
8. 8

   Orthognathic Surgery

   4 topics

   • Indications for Surgery
     • Skeletal Discrepancies
     • Functional Problems
   • Surgical Procedures
     • Maxillary Surgery
     • Mandibular Surgery
     • Genioplasty
   • Pre-surgical Orthodontics
     • Alignment and Leveling
     • Decompensation
   • Post-surgical Orthodontics
     • Finishing
     • Retention
9. 9

   Retention and Relapse

   2 topics

   • Retention Strategies
     • Removable Retainers
     • Fixed Retainers
   • Factors Influencing Relapse
     • Biological Factors
     • Mechanical Factors
10. 10

    Recent Advances in Orthodontics

    3 topics

    • Digital Orthodontics
      • 3D Imaging
      • CAD/CAM Appliances
    • Temporary Anchorage Devices (TADs)
      • Types of TADs
      • Clinical Applications
    • Clear Aligners
      • Indications
      • Treatment Protocols

Orthodontics flashcards for NEET MDS

21 of 50 cards from the Orthodontics deck — real questions with worked answers.

1. Who is regarded as the 'Father of Modern Orthodontics' and what major contribution is he known for?

   Edward H. Angle. He established orthodontics as a specialty, founded the first orthodontic school (1900), created the Edge-wise appliance, and devised the Angle's classification of malocclusion based on the first molar relationship.

2. What is the formal definition of orthodontics as given by the British Society of the Study of Orthodontics?

   Orthodontics is the branch of dentistry concerned with the study of growth and development of the jaws and face particularly, and the body generally, as influencing the position of the teeth; the study of action and reaction of internal and external influences on the development; and the prevention and correction of arrested and perverted development.

3. List the three main objectives/scope of orthodontic treatment.

   (1) Esthetics (improved facial and dental appearance), (2) Function (efficient mastication, speech, and stable occlusion), and (3) Stability/health (long-term periodontal health and prevention/correction of malocclusion).

4. Name the four classical theories of craniofacial growth control.

   (1) Genetic/Sicher's blastemal theory, (2) Sutural theory (sutures as primary growth sites), (3) Cartilaginous theory / nasal septum theory (Scott), and (4) Functional matrix theory (Moss) — growth of soft tissues drives skeletal growth.

5. According to Moss's Functional Matrix Theory, what drives craniofacial skeletal growth?

   The functional matrices (soft tissues and functional spaces) are the primary determinants; bones grow secondarily in response to functional demands. It distinguishes the periosteal matrix (alters bone by remodeling) and capsular matrix (translates the bone).

6. What are the three mechanisms by which bone grows, as described by Enlow?

   (1) Cortical drift (deposition on one surface, resorption on the opposite), (2) Displacement (primary - bone moves as it grows; secondary - movement due to growth of adjacent bone), and remodeling via the 'V principle' and surface relocation.

7. By what mechanism does the mandible primarily grow in length and where is its main growth site?

   The mandible grows mainly by endochondral ossification at the condylar cartilage and by surface remodeling/apposition at the posterior border of the ramus, with resorption at the anterior ramus relocating it posteriorly.

8. What are the three periods of the dentition and their approximate ages?

   Primary (deciduous) dentition: ~6 months to 6 years; Mixed dentition: ~6 to 12 years; Permanent dentition: from ~12 years onward.

9. What is 'leeway space of Nance' and what are its values in maxilla and mandible?

   The leeway space is the difference between the combined mesiodistal width of the primary canine, first and second molars and that of their permanent successors (canine, first and second premolars). It is ~0.9 mm per side in the maxilla and ~1.7 mm per side in the mandible.

10. Differentiate primate (anthropoid) spaces from developmental spaces in the primary dentition.

    Primate spaces are constant spaces located mesial to the maxillary canines and distal to the mandibular canines. Developmental spaces are generalized spaces between all primary teeth that aid alignment of larger permanent teeth.

11. What is the normal eruption sequence of permanent teeth in the mandible?

    6 (first molar) → 1 (central incisor) → 2 (lateral incisor) → 3 (canine) → 4 (first premolar) → 5 (second premolar) → 7 (second molar) → 8 (third molar). Often written 6-1-2-3-4-5-7-8.

12. In a clinical orthodontic examination, what does the 'three-plane' (spatial) assessment evaluate?

    The malocclusion/face is assessed in three planes of space: anteroposterior (sagittal), vertical, and transverse, evaluated extra-orally and intra-orally to localize the problem.

13. What is the standard set of diagnostic records required for orthodontic case workup?

    Study models (casts), intra- and extra-oral photographs, radiographs (panoramic/OPG and lateral cephalogram, plus periapicals as needed), and case history with clinical examination; increasingly supplemented by CBCT and digital scans.

14. Define cephalometrics and state its primary purpose in orthodontics.

    Cephalometrics is the standardized measurement and analysis of the craniofacial skeleton, teeth and soft tissues from a lateral (or PA) cephalogram. It is used for diagnosis, treatment planning, growth prediction, and evaluating treatment outcomes.

15. What are the normal values of the SNA, SNB and ANB angles in cephalometric analysis?

    SNA ≈ 82° (maxilla to cranial base), SNB ≈ 80° (mandible to cranial base), and ANB ≈ 2° (relative jaw discrepancy). ANB >4° suggests Class II skeletal pattern; ANB <0° suggests Class III.

16. What does the Frankfort-Mandibular Plane Angle (FMA) indicate and what is its average value?

    FMA is the angle between the Frankfort horizontal plane and the mandibular plane (Tweed analysis), indicating the vertical growth pattern. Average ≈ 25°; high FMA = vertical/hyperdivergent grower, low FMA = horizontal/hypodivergent grower.

17. In Steiner's analysis, what are the normal inclinations of the maxillary and mandibular incisors?

    Maxillary incisor to NA: angle 22°, linear 4 mm. Mandibular incisor to NB: angle 25°, linear 4 mm. The interincisal angle averages ~130-131°.

18. What are the broad orthodontic treatment-planning categories based on space analysis?

    Non-extraction (expansion, proclination, IPR/stripping, distalization) versus extraction therapy, and orthognathic surgery for severe skeletal discrepancies. The choice depends on the amount of arch-length discrepancy, profile, and skeletal pattern.

19. Differentiate removable from fixed orthodontic appliances in terms of tooth movement.

    Removable appliances produce mainly tipping (single-point force) movements and can be taken out by the patient; fixed appliances are bonded/banded and deliver controlled bodily movement, rotation, torque, and intrusion/extrusion via brackets and archwires.

20. Name the essential components of a removable orthodontic appliance.

    (1) Active components (springs, screws, bows, elastics), (2) Retentive components (clasps e.g. Adams, Southend), (3) Anchorage, and (4) the Baseplate (acrylic) that connects everything and may carry bite planes.

21. What are the main components ('the four parts') of a fixed appliance?

    Brackets (and molar tubes/bands), archwires, ligatures/modules, and auxiliaries (elastics, springs, chains, hooks). These work together to deliver three-dimensional control of tooth position.

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