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Interceptive orthodontics 1

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Interceptive orthodontics 1

  1. 1. INTERCEPTIVE ORTHODONTICS 04/03/14 1www.indiandentalacademy.com INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com
  2. 2. www.indiandentalacademy.com 204/03/14 DEFINITION :  Intervention in the incipient stages of a problem to lessen its severity or possible future adverse effects and to eliminate its causes  Intercept a malocclusion that has already developed or is developing.
  3. 3. www.indiandentalacademy.com 304/03/14  Such treatment may take place in deciduous or transitional dentition and may include  redirection of ectopically erupting teeth, slicing or extraction of deciduous teeth, correction of isolated dental crossbites or recovery of minor space loss
  4. 4. www.indiandentalacademy.com 404/03/14 DIFFERENCE BETWEEN PREVENTIVE & INTERCEPTIVE ORTHODONTICS  Unlike preventive orthodontic procedures that are aimed at elimination of factors that may lead to malocclusion.  Interceptive orthodontics is undertaken at a time when the malocclusion has already developed or is developing.
  5. 5. www.indiandentalacademy.com 504/03/14  Interceptive orthodontics basically refers to measures undertaken to prevent a potential malocclusion from progressing into a more severe one.  The procedures undertaken are: 1. Serial extractions 2. Correction of developing cross-bite 3. Control of abnormal habits 4. Space regaining 5. Muscle exercises 6. Interception of skeletal mal-relation 7. Removal of soft tissue or bony barrier to enable eruption of teeth
  6. 6. www.indiandentalacademy.com 604/03/14 PURPOSE OF EARLY ORTHODONTIC TREATMENT 1. To intercept developing problem 2. To prevent obvious problems from becoming worse 3. To correct obvious problems 4. To remove the etiologic factors and restore normal growth 5. To reduce the severity of skeletal problems, making possible easier and more precise tooth positioning in adolescence.
  7. 7. www.indiandentalacademy.com 704/03/14 INDICATIONS FOR EARLY ORTHODONTIC INTERVENTION 1. Anterior and posterior cross-bite : not only for the functional improvement brought about by therapy but also for the improved esthetics that occur with the anterior cross-bite correction. 2. Severe anterior and lateral open-bites 3. Ectopic eruption 4. Severe arch length discrepancies 5. Pseudo class III 6. Dental and / or skeletal Class II 7. Maxillary mid face deficiency 8. Deep bite 9. Habits 10. Midline discrepancies 11. Management of supernumery teeth 12. Ankylosed teeth
  8. 8. www.indiandentalacademy.com 804/03/14 BENEFITS OF EARLY TREATMENT 1. Reduced incidence of premolar extractions 2. Decreased extent or possible elimination of the need for a second phase of treatment. 3. Reduced need for surgical orthodontics 4. Increased stability of transverse & antero-posterior dimension changes with phase 1 treatment. 5. Increased long term stability of lower incisor alignment 6. Reduced incidence of root resorption 7. Reduced incidence of mucogingival problems 8. Reduced incidence of ectopic cuspid eruptions
  9. 9. www.indiandentalacademy.com 904/03/14 DISADVANTAGES 1. Sometimes requiring two phase / three phase of treatment leading to patient burnout and patient dissatisfaction. 2. Prolonged treatment time 3. Increased cost 4. Discrepancy in growth patterns tend to re-establish after some time 5. Can not be used in cases like bimaxillary protrusion when extraction of teeth is required. As in such cases 1 phase treatment is beneficial.
  10. 10. www.indiandentalacademy.com 1004/03/14 CONDITIONS 1. Anterior cross bite 2. Posterior cross bite 3. Open bite 4. deep bite 5. Ectopic eruption 6. Midline deviation 7. Midline diastema 8. Space regainers
  11. 11. www.indiandentalacademy.com 1104/03/14 CROSS BITE  Definition  An abnormal relationship of one or more teeth to one or more teeth of the opposing arch in the bucco-lingual or labio-lingual direction
  12. 12. www.indiandentalacademy.com 1204/03/14
  13. 13. www.indiandentalacademy.com 1304/03/14 Classification of cross bite  Cross bite can be : 1. Anterior / posterior cross bite 2. Buccal / lingual cross bite 3. Dental / skeletal / functional in etiology
  14. 14. www.indiandentalacademy.com 1404/03/14 Scissor bite  Situation in which posterior teeth overlap vertically in habitual occlusion with their antagonists without contact of their occlusal surfaces  The deviation of the affected teeth from their ideal positions could occur either in a buccal or a lingual direction.
  15. 15. www.indiandentalacademy.com 1504/03/14 Dental cross bite  An abnormal relationship between antagonist teeth, that is due to deviations in the position or inclination of one or few teeth.  The relationship between the maxilla and the mandible is harmonious.  Such cross bites are treated by tooth movement alone.
  16. 16. www.indiandentalacademy.com 1604/03/14
  17. 17. www.indiandentalacademy.com 1704/03/14
  18. 18. www.indiandentalacademy.com 1804/03/14 Skeletal cross bite  Anterior or posterior (unilateral or bilateral) cross bite that is due to a sagittal or transverse in coordination in the size or shape of the maxilla and or mandible.  Treatment usually requires a skeletal expansion by means of rapid maxillary expansion or orthognathic surgery.
  19. 19. www.indiandentalacademy.com 1904/03/14
  20. 20. www.indiandentalacademy.com 2004/03/14
  21. 21. www.indiandentalacademy.com 2104/03/14 Functional cross bite pseudo cross bite  A cross bite that is due to a shift of mandible into faulty habitual occlusion because of premature occlusal interference.  This shift may occur in an anterior and or lateral direction.
  22. 22. www.indiandentalacademy.com 2204/03/14
  23. 23. www.indiandentalacademy.com 2304/03/14
  24. 24. www.indiandentalacademy.com 2404/03/14 Etiology  Hereditary  Over retained deciduous teeth.  Displacement due to trauma.  Constricted maxillary arch.  Large mandible.  Cross bite due to a shift of mandible ,into faulty habitual occlusion .  Multiple loss of post. Deciduous teeth can cause anterior cross bite.
  25. 25. www.indiandentalacademy.com 2504/03/14 Treatment –dental cross bite. (single tooth cross bite)  Correct the inclination or position of teeth  Erupting maxillary incisor – with tongue blade.  Removable appliance with Z spring and posterior bite plate.  Fixed appliance with posterior bite plate.
  26. 26. www.indiandentalacademy.com 2604/03/14
  27. 27. www.indiandentalacademy.com 2704/03/14
  28. 28. www.indiandentalacademy.com 2804/03/14 Treatment -skeletal cross bite (segmental cross bite)  In mixed dentition –  Skeletal expansion of maxilla with rapid maxillary expansion for lateral cross bite.  Mid –face deficiency –face mask can be given  Large mandible—chin cap to restrict the growth , F.R. III
  29. 29. www.indiandentalacademy.com 2904/03/14
  30. 30. www.indiandentalacademy.com 3004/03/14
  31. 31. www.indiandentalacademy.com 3104/03/14
  32. 32. www.indiandentalacademy.com 3204/03/14
  33. 33. www.indiandentalacademy.com 3304/03/14
  34. 34. www.indiandentalacademy.com 3404/03/14
  35. 35. www.indiandentalacademy.com 3504/03/14 Treatment Functional cross bite (pseudo)  Remove the occlusal interference
  36. 36. www.indiandentalacademy.com 3604/03/14 Open bite 
  37. 37. www.indiandentalacademy.com 3704/03/14 Definition of open bite  Localized absence of occlusion.  Failure of teeth to meet the antagonist in the opposing arch.  Failure of overlapping of upper and lower teeth in centric occlusion. (amount of separation measured.)  Failure of some opposing teeth to occlude when others are in maximum intercuspation.
  38. 38. www.indiandentalacademy.com 3804/03/14
  39. 39. www.indiandentalacademy.com 3904/03/14
  40. 40. www.indiandentalacademy.com 4004/03/14
  41. 41. www.indiandentalacademy.com 4104/03/14 CLASSIFICATION  LOCATION-  ANTERIOR / POSTERIOR  TYPE  SKELETAL / DENTAL
  42. 42. www.indiandentalacademy.com 4204/03/14 ETIOLOGY OF OPEN BITE 1)-Disturbance in the eruption of teeth  Ankylosis due to infection  Primary failure of eruption 2)-mechanical interference  Habits like tongue thrust, thumb sucking etc. 3)-osseous dyspasia  Endocrine disturbance-  Downs syndrome  Hemi mandibular hypertrophy.
  43. 43. www.indiandentalacademy.com 4304/03/14 Differences between dental and skeletal open bite Dental Skeletal Profile Normal Convex vertical proportion Normal increased Lips Competent Incompetent Etiology Habit Hereditary Tongue Positioned in the open bite region Not necessary placed in open bite region
  44. 44. www.indiandentalacademy.com 4404/03/14 Long face syndrome Thank you For more details please visit www.indiandentalacademy.com

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