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Classifi mo 1 /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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Classifi mo 1 /certified fixed orthodontic courses by Indian dental academy

  1. 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. OCCLUSION • RELATIONSHIPOF THE MAXILLARY AND MANDIBULAR TEETH WHEN THE JAWS ARE CLOSED IN CENTRIC RELATION WITHOUT STRAIN IN THE MUSCULATURE OR DISPLACEMENT OF THEIR CONDYLES IN THEIR FOSSA www.indiandentalacademy.com
  3. 3. TERMINOLOGY • Anteroposterior: Overjet • Vertical: Deep overbite, Openbite • Transverse : Cross bite www.indiandentalacademy.com
  4. 4. NORMAL OCCLUSION • In terms of molar relation. www.indiandentalacademy.com
  5. 5. • Line of occlusion: Teeth should be arranged in a smoothly (catenary) curving line of occlusion. www.indiandentalacademy.com
  6. 6. MALOCCLUSION TYPES • Dental (Dento-alveolar): abnormal relationship between the teeth themselves. • Skeletal: Both the upper and lower dentition may be normal but there may be associated skeletal defect. • Skeleto-dental: Combination www.indiandentalacademy.com
  7. 7. PURPOSE OF CLASSIFICATION • Diagnosis and treatment planning • Comparison • Communication • Thinking of the possible treatment modalities that may be needed in a particular case. www.indiandentalacademy.com
  8. 8. • ANGLE SYSTEM: Modifications: Lischers, Deweys, Howards, Taylors • SIMON SYSTEM • ETILOGICAL CLASSSIFICATION BY MOYERS • ACKERMANN AND PROFFIT CLASSIFICATION • BALLARDS SKELETAL CLASSIFICATION www.indiandentalacademy.com
  9. 9. ANGLES CLASSIFICATION • Edward H. Angle in 1899 • Class I malocclusion • Class II malocclusion • Class III malocclusion www.indiandentalacademy.com
  10. 10. CLASS I MALOCCLUSION • Lower dental arch is in normal relation to the upper dental arch. • Mesiobuccal cusp of the upper Ist molar occludes with the mesiobuccal groove of the lower first molar. • Irregularity of the individual teeth with normal dental arches. • 60 - 70% of all cases of malocclusion fall into this class.www.indiandentalacademy.com
  11. 11. CLASS II MALOCCLUSION • The distobuccal cusp of upper first permanent molar occludes in the mesiobuccal groove of the lower first permanent molar. • Class II division 1 • Class II division 2 • Class II subdivision 1 • Class II subdivision 2www.indiandentalacademy.com
  12. 12. Class II div 1 Extraoral features: • Convex profile • Deep mentolabial sulcus • Hyperactive mentalis muscle • Hypotonic upper lip • Incompetent lips www.indiandentalacademy.com
  13. 13. Class II div 1 Intraoral features: • Class II canine and molar relationship • Increased overjet and overbite • Deep curve of spee • Constricted maxillary arch www.indiandentalacademy.com
  14. 14. www.indiandentalacademy.com
  15. 15. Class II div 2 Extraoral: • Competent lips • Well balanced face • Flat mandibular plane Intraoral: • Class II canine • Class II malar • Upper centrals: Retroclined • Upper laterals :Proclined • Upper arch: U shape • Supraeruption: lower ant. • Infraeruption: Lower post. www.indiandentalacademy.com
  16. 16. CLASS III MALOCCLUSION • Upper permanent IInd premolar occludes with the buccal groove of the lower Ist permanent molar. • Constitutes to about 3% of malocclusion • also called Prenormal occlusion or Mesiocclusion. www.indiandentalacademy.com
  17. 17. Class III malocclusion Extraoral features: • Concave profile • Mentolabial sulcus: Flat • Hypotonic lower lip • Hypertonic upper lip • Prominent chin Intral oral features: • ClassIII canine & molar • Reverse overjet • Curve of spee : Flat • Lingual inclination of lower incisors www.indiandentalacademy.com
  18. 18. www.indiandentalacademy.com
  19. 19. True Class III • Heriditary in nature • There is a definite skeletal defect and exhibits the following charecteristics:  Normal maxilla with prognathic mandible  Retruded maxilla with normal mandible  Combination of the above www.indiandentalacademy.com
  20. 20. Pseudo Class III • Can occur due to following reasons: • Early loss of deciduous posterior teeth - Functional type of malocclusion. • Cleft lip & palate condition: Surgery is done in the early stage - retrained growth of the maxilla results - Psedo class III. • Presence of occlusal prematurities may deflect the mandible forward. www.indiandentalacademy.com
  21. 21. DRAWBACKS OF ANGLE’S CLASSIFICATION • First permanent molars are not fixed points in the skull anatomy. • The classification of malocclusion is based on the anteroposterior relationship only. • The individual tooth malposition cannot be visualised. • When the Ist molars are extracted, this classification cannot be applied. www.indiandentalacademy.com
  22. 22. DRAWBACKS OF ANGLE’S CLASSIFICATION • This classification cannot be applied to deciduous dentition. • The severity of malocclusion cannot be judged from this classification. www.indiandentalacademy.com
  23. 23. INCISOR CLASSIFICATION • Class I: Lower incisal edges occlude with the middle part of the palatal surface of the upper incisors • Class II: Lower incisal edges lie posterior to the middle part of the palatal surface of the upper incisors. • Class III: Lower incisal edges lie anterior to the middle part of the palatal surface of the upper incisors. www.indiandentalacademy.com
  24. 24. SIMONS CLASSIFICATION • 3 Planes are involved: • Frankfurt horizontal plane • Orbital plane • Mid-sagittal plane www.indiandentalacademy.com
  25. 25. FRANKFURT HORIZONTAL PLANE • From the most superior point of external auditory meatus (porion) to the inferior border of the orbit (oribitale) • Attraction- Nearer to FHP. • Abstraction: Away from the FHP www.indiandentalacademy.com
  26. 26. ORBITAL PLANE • This is perpendicular to FHP and also perpendicular to Median raphe plane/ • Protraction: Forward position of the jaw. • Retraction: Posterior position of the jaw. www.indiandentalacademy.com
  27. 27. MID SAGITTAL PLANE • This is all the median raphe plane. • Contraction: Nearer to mid sagittal plane. • Distraction: Away from mid sagittal plane. www.indiandentalacademy.com
  28. 28. www.indiandentalacademy.com Thank you For more details please visit www.indiandentalacademy.com

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