Unfavourable Sequelae of malocclusion

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Introduction to Orthodontics
Fifth Year

Unfavourable Sequelae of malocclusion

  1. 1. Unfavorable Sequelae of Malocclusion
  2. 2. 1. Unfavorable psychological and social behaviour: Children often become introvertive, or overassertive unfavorable psychological effects tend to accompany speech defects that are attributable to dental malocclusions. May 22, 2012 Dr. Ahmed Basyouni 2
  3. 3. 2. Poor appearance: Any departure from the usual or normal attracts attention. For children this often means ridicule. May 22, 2012 Dr. Ahmed Basyouni 3
  4. 4. 3. Interference with normal growth & development: A frequent result of prolonged thumb sucking habit with associated perioral muscle malfunction, is a posterior crossbite. May 22, 2012 Dr. Ahmed Basyouni 4
  5. 5. 4. Improper or abnormal muscle function: Hereditary basal malrelationship, requires certain adaptive or compensatory muscle responses. Correction of malocclusion eliminates the abnormal lip, tongue, and buccal muscle activity. May 22, 2012 Dr. Ahmed Basyouni 5
  6. 6. 5. Improper deglutition: Abnormal swallowing is associated with abnormal muscle function. May 22, 2012 Dr. Ahmed Basyouni 6
  7. 7. 6. Mouth breathing: a. Increased respiratory involvement (ear, nose, throat disorders). b. Enlarged tonsils and adenoids. c. Enlarged turbinate. May 22, 2012 Dr. Ahmed Basyouni 7
  8. 8. 7. Improper mastication: a. Disability to chew properly is a result of malocclusion. Missing or malposed teeth on one side are sufficient reasons for improper mastication. b. Possible nutritional deficiency. c. Increased workload on digestive tract. May 22, 2012 Dr. Ahmed Basyouni 8
  9. 9. 8. Speech defects: It has been recognized dental malocclusion serve as a factor in speech defects. The effects on speech may be both: Direct by mechanical difficulties, & Indirect, bec. of the influence on physical and mental health of the individual. May 22, 2012 Dr. Ahmed Basyouni 9
  10. 10. 9. Dental caries and malocclusion: a. Increased caries incidence b. Oral hygiene is more difficult to perform, particularly for children. c. Dental caries leads to loss of arch length. May 22, 2012 Dr. Ahmed Basyouni 10
  11. 11. 10. Predilection to periodontal diseases: a. Increased incidence of periodontal diseases, bec. Of poor oral hygiene. b. Poor contacts, spaces and tipped teeth permit food impaction. c. Lack of proper massage and natural stimulation. d. Abnormal axial inclination, abnormal stresses, due to functional prematurities. All these factors react to accelerate earlier loss of teeth. May 22, 2012 Dr. Ahmed Basyouni 11
  12. 12. 11. Temporomandibular joint disorder: Tooth guidance, abnormal muscle function, overclosure or bruxism may cause clicking, crepitus, pain, limited motion and trismus. May 22, 2012 Dr. Ahmed Basyouni 12
  13. 13. 12. Predilection to accidents: Damage of maxillary incisors (fractured, devitalized, or lost) as a result of protruded and relatively unprotected status specially in Class II, div. 1 malocclusion. May 22, 2012 Dr. Ahmed Basyouni 13
  14. 14. 13. Impacted and unerupted teeth: a. Premature loss and prolonged retention of decid. Teeth may interfere with eruption of their permanent successors or neighbors. b. Partially impacted teeth may damage contiguous teeth by resorbing part or all of their roots. May 22, 2012 Dr. Ahmed Basyouni 14
  15. 15. 14. Complications in prosthetic rehabilitation: Malocclusion, with usual characteristics of rotated or tipped teeth, poor contacts, elongation into opposing edentulous areas, and space problems can create obstacles for dentist, to render a satisfactory prosthetic service, specially if Orthodontist is unavailable. May 22, 2012 Dr. Ahmed Basyouni 15
  16. 16. 14. Complications in prosthetic rehabilitation: May 22, 2012 Dr. Ahmed Basyouni 16
  17. 17. Cephalometric Tracing Steps Step 1: Trace Porion (Po) and Orbitale (Or). Step 2: Trace Pterygomaxillary Fissure (Ptm) and Nasion (N). Step 3: Trace Cranial Base. Step 4: Trace Mandible. Step 5: Trace Maxilla. Step 6: Trace Dentition. May 22, 2012 Dr. Ahmed Basyouni 17
  18. 18. May 22, 2012 Dr. Ahmed Basyouni 18
  19. 19. May 22, 2012 Dr. Ahmed Basyouni 19
  20. 20. SNA May 22, 2012 Dr. Ahmed Basyouni 20
  21. 21. SNB May 22, 2012 Dr. Ahmed Basyouni 21
  22. 22. ANB May 22, 2012 Dr. Ahmed Basyouni 22
  23. 23. 1 To N A May 22, 2012 Dr. Ahmed Basyouni 23
  24. 24. _ 1 To N B May 22, 2012 Dr. Ahmed Basyouni 24
  25. 25. _ 1-1 May 22, 2012 Dr. Ahmed Basyouni 25
  26. 26. Mandibular plane to Sella-Nasion plane May 22, 2012 Dr. Ahmed Basyouni 26
  27. 27. May 22, 2012 Dr. Ahmed Basyouni 27
  28. 28. May 22, 2012 Dr. Ahmed Basyouni 28
  29. 29. Cephalometric Analysis NO. MEASUREMENTS INITIATIAL PROGRESS FINAL MEAN S-N-A 82 o S-N-B 80 o A-N-B 2o S-N-Pg 80 o Facial Angle(FH-NPog) 87 o Angle of Convexity(N-A-Pog) 4o Gonial Angle 124 o Cranial base angle 132 o SN to Mand Pl. 32 o SN to Pal Pl. 9o Pal. Pl. to Mand Pl. 23 o Skeletal May 22, 2012 FH Pl. to Mand Pl. Dr. Ahmed Basyouni 25 o 29
  30. 30. 130 O _ 1 TO 1 _ 1 to Mand. Pl. _ 1 to FH Pl. _ 1 to N-B Angle 25 o 4 mm. 1 to N-A Angle 22 o 1 to N-A mm. 4 mm. 1 to FH Pl. May 22, 2012 65 o _ 1 to N-B mm. DENTAL 90 o 112 o Dr. Ahmed Basyouni 30
  31. 31. UL-E PLANE May 22, 2012 LL-E Plane -2 mm. NL Angle SOFT TISSUE -4 MM. 90-110 o Dr. Ahmed Basyouni 31
  32. 32. Case Selection Criteria  Simple Class I malocclusion in late mixed dentition stage with: - Proclined spaced incisors. OR - Single tooth in cross bite. May 22, 2012 Dr. Ahmed Basyouni 32
  33. 33. The Wise Way … May 22, 2012 Dr. Ahmed Basyouni 33
  34. 34. If you are successful, you will win some false friends and some true enemies; Succeed anyway. May 22, 2012 Dr. Ahmed Basyouni 34
  35. 35. If you are kind, people may accuse you of selfish, ulterior motives; May 22, 2012 Be kind anyway. Dr. Ahmed Basyouni 35
  36. 36. The good you do today, people will often forget tomorrow; Do good anyway. May 22, 2012 Dr. Ahmed Basyouni 36
  37. 37. You see, in the final analysis, it is all between you and God; It was never between you and them anyway. May 22, 2012 Dr. Ahmed Basyouni 37
  38. 38. May 22, 2012 Dr. Ahmed Basyouni 38

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