Arrangement of artificial teeth 1


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arrangment of artificial

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Arrangement of artificial teeth 1

  1. 1. Prepared byd.Sirag al-hamadiTripoli university Dental faculty08/29/12 D.SIRAG EDDIN AL-HAMADI 1
  2. 2. The carved occlusion rims should provide reliable guides for placement of the teeth. These guides are:08/29/12 D.SIRAG EDDIN AL-HAMADI 2
  3. 3. Guide lines (midline, high lip line-1(.and canine lines08/29/12 D.SIRAG EDDIN AL-HAMADI 3
  4. 4. The proper placement of the-2 .occlusal plane08/29/12 D.SIRAG EDDIN AL-HAMADI 4
  5. 5. .Proper lip support-308/29/12 D.SIRAG EDDIN AL-HAMADI 5
  6. 6. (vertical dimension of occlusion (.and centric relation08/29/12 D.SIRAG EDDIN AL-HAMADI 6
  7. 7. 08/29/12 D.SIRAG EDDIN AL-HAMADI 7
  8. 8. Upper anterior teeth08/29/12 D.SIRAG EDDIN AL-HAMADI 8
  9. 9. 08/29/12 D.SIRAG EDDIN AL-HAMADI 9
  10. 10. :Alveolar ridge resorption- 1 •Ridge resorption in anterior maxilla occurs upwards and back wards. • In anterior mandible it occurs downward and lingually. •The anterior teeth are placed in maxillary denture forwards and inferiorly.08/29/12 . D.SIRAG EDDIN AL-HAMADI 10
  11. 11. The distance from papilla to gingival margin 8 mm From papillae to incisal edge 10 mm08/29/12 D.SIRAG EDDIN AL-HAMADI 11
  12. 12. Esthetics-teeth is important. Lip support by the 2 Amount of tooth showing (about 2 mm) Lower lip pressure causes instability of mandibular denture if placed anteriorly.08/29/12 D.SIRAG EDDIN AL-HAMADI 12
  13. 13. Grinding incisal edge and changing positionof teeth08/29/12 D.SIRAG EDDIN AL-HAMADI 13
  14. 14. Too colored teeth to simulate natural teeth08/29/12 D.SIRAG EDDIN AL-HAMADI 14
  15. 15. Phonetics-3  Speech is affected by the position of the teeth and the contour and bulk of the palate.08/29/12 D.SIRAG EDDIN AL-HAMADI 15
  16. 16. 08/29/12 D.SIRAG EDDIN AL-HAMADI 16
  17. 17. The central incisor  Edges in contact with the plane.08/29/12 D.SIRAG EDDIN AL-HAMADI 17
  18. 18. The lateral incisor The edge is l- 2mm short of plane.08/29/12 D.SIRAG EDDIN AL-HAMADI 18
  19. 19. The canine  Its cusp is in contact with the horizontal plane.08/29/12 D.SIRAG EDDIN AL-HAMADI 19
  20. 20. The labial surfaces of the anterior teeth present a curve .depending on the ridge08/29/12 D.SIRAG EDDIN AL-HAMADI 20
  21. 21. The long axes of the teeth are not made parallel. If this done it will Appear artificial and .unnatural08/29/12 D.SIRAG EDDIN AL-HAMADI 21
  22. 22. Lower anterior teeth08/29/12 D.SIRAG EDDIN AL-HAMADI 22
  23. 23. General considerations The midline of lower anterior as the upper one. The teeth are set on the ridge. The. overlap will be about 1.5 mm.08/29/12 D.SIRAG EDDIN AL-HAMADI 23
  24. 24. Vertical and horizontal overlap In natural teeth there is contact between upper and lower teeth08/29/12 D.SIRAG EDDIN AL-HAMADI 24
  25. 25. In complete denture 1mm overjet is left and incisal angle less than 15 degree08/29/12 D.SIRAG EDDIN AL-HAMADI 25
  26. 26. The central and lateral incisors The incisive edge 1.5 mm above plane.08/29/12 D.SIRAG EDDIN AL-HAMADI 26
  27. 27. The canine The incisal tip may be slightly higher than the lateral and central incisor.08/29/12 D.SIRAG EDDIN AL-HAMADI 27
  28. 28. 08/29/12 D.SIRAG EDDIN AL-HAMADI 28
  29. 29. 08/29/12 D.SIRAG EDDIN AL-HAMADI 29
  30. 30. The following factors are considered08/29/12 D.SIRAG EDDIN AL-HAMADI 30
  31. 31. The neutral zone-1 the neutral ِ eeth are in T zone. This ensures denture .stability The cheek and lip press on the teeth from outside and the tongue from inside. The area of equilibrium between the two forces is .called the neutral zone08/29/12 D.SIRAG EDDIN AL-HAMADI 31
  32. 32. The position of the-2 posterior teeth in relation to the alveolar ridge The posterior teeth are placed on the ridge crest especially the mandibular teeth. This position is important for lower denture .stability If it is necessary to place the teeth outside the ridge crest it is done for the maxillary08/29/12 . denture D.SIRAG EDDIN AL-HAMADI 32
  33. 33. Balanced occlusion-3 It is maximum contact between the maxillary and mandibular teeth in centric and eccentric positions. Eccentric positions include protrusive position and lateral position in both .working and balancing sides08/29/12 D.SIRAG EDDIN AL-HAMADI 33
  34. 34. There should be maximum centric occlusion08/29/12 D.SIRAG EDDIN AL-HAMADI 34
  35. 35. Contact during protrusion At least three widely separated points or .areas of occlusion must exist08/29/12 D.SIRAG EDDIN AL-HAMADI 35
  36. 36. Contact during lateral movement Working side Balancing side08/29/12 D.SIRAG EDDIN AL-HAMADI 36
  37. 37. Contact during lateral movement08/29/12 D.SIRAG EDDIN AL-HAMADI 37
  38. 38. To achieve balance there should be anteroposterior curve for the posterior teeth (curve of Spee) and mediolateral curve (curve (.of Monson08/29/12 D.SIRAG EDDIN AL-HAMADI 38
  39. 39. 08/29/12 D.SIRAG EDDIN AL-HAMADI 39
  40. 40. The maxillary posterior teeth Note the anteroposterior curve.08/29/12 D.SIRAG EDDIN AL-HAMADI 40
  41. 41. The posterior teeth buccal surfaces make contact with a straight line drawn from the .labial surface of the canine backwards08/29/12 D.SIRAG EDDIN AL-HAMADI 41
  42. 42. 08/29/12 D.SIRAG EDDIN AL-HAMADI 42
  43. 43. The mandibular posterior teeth The mandibular teeth are set to occlude with maxillary teeth in anteroposterior and mediolateral curves.08/29/12 D.SIRAG EDDIN AL-HAMADI 43
  44. 44. 08/29/12 D.SIRAG EDDIN AL-HAMADI 44
  45. 45. 08/29/12 D.SIRAG EDDIN AL-HAMADI 45
  46. 46. The buccal cusps of the lower posterior interdigitate with the . maxillary central fossae08/29/12 D.SIRAG EDDIN AL-HAMADI 46
  47. 47. The palatal cusps of the upper posterior teeth interdigitate with the central fossae of the mandibular teeth.08/29/12 D.SIRAG EDDIN AL-HAMADI 47
  48. 48. 08/29/12 D.SIRAG EDDIN AL-HAMADI 48
  49. 49. A) Superior protrusion((Class II The lower ridge is narrower than the upper and associated with a receding chin.08/29/12 D.SIRAG EDDIN AL-HAMADI 49
  50. 50. Setting up the posterior teeth Setting the upper teeth inside the ridge does not produce marked instability  While setting, the lower teeth outside the ridge will lead to instability.08/29/12 D.SIRAG EDDIN AL-HAMADI 50
  51. 51. Setting the anterior teeth The large overjet is preserved. Angulations of the upper teeth give the patient a rabbit appearance Angulations of the lower tend to unstabilise the denture08/29/12 D.SIRAG EDDIN AL-HAMADI 51
  52. 52. B-Inferior protrusion(Class III) The lower ridge is broader than the upper and usually associated with a protruded chin.08/29/12 D.SIRAG EDDIN AL-HAMADI 52
  53. 53. Setting of the posterior teeth Cross biting the posterior teeth.08/29/12 D.SIRAG EDDIN AL-HAMADI 53
  54. 54. Lingual view for cross bite arrangement08/29/12 D.SIRAG EDDIN AL-HAMADI 54
  55. 55. Setting of the posterior teeth Lower teeth that are narrow buccolingually are of great advantages If the upper teeth set outside the ridge a metal plate should be incorporated in the denture to prevent fracture.08/29/12 D.SIRAG EDDIN AL-HAMADI 55
  56. 56. Setting of the anterior teeth The anterior teeth in such cases are best set either edge to edge or with a negative overjet.08/29/12 D.SIRAG EDDIN AL-HAMADI 56
  57. 57. Gum fitted anterior teeth The absence of the anterior gum work affect denture retention and wings may be used.08/29/12 D.SIRAG EDDIN AL-HAMADI 57
  58. 58. Indications gum fitted upper anterior teeth a) When the teeth too prominent. b) When the gum work presses the lip out e.g. in tight-lipped patients.08/29/12 D.SIRAG EDDIN AL-HAMADI 58
  59. 59. References Allen AA, Heath JR, Mc Cord: Complete Prosthodontics; Problems, Diagnosis and Management. Mosby-Wolf, London, -1  .1995 Beresin, V.E. and Schiesser, F. J.: The neutral zone in complete and partial dentures. 2nd ed. St. Louis, The C.V. Mosby - 2 .Company: 1978 . Coleman, R. D. and kaiser, W. B.: The Scientific Bases of Dentistry. Philadelphia, W. B. Sounders; 1966 - 3  .Craig, R.G.: Restorative Dental Materials. 8 ed. St. Louis, C. V. Mosby Company - 4 th  .Fenn, H.R.B.; Liddelow, K.P. and Gemson, A.B.: Clinical Dental Prosthetics. 2 ed. London, Staples; 1974 -5  Geering AH,Kundert M , Kelesy C: Complete denture and overdenture Prosthetics. Theme medical publication Inc. - 6  .New York, 1993 Grant AR, Heath JR, Mc Cord JF: Complete Prosthodontics; Problems, Diagnosis and Management. Mosby-Wolf, -7  .London, 1996 Heartwell, C.M. and Rhan, A.G.: Syllabus of Complete Dentures. 3rd ed. Philadelphia, Lea and- 8 .Febiger; 1986 .Sharry, J.J.: Complete denture prosthodontics. 3rd ed. NewYork, McGraw-Hill; 1974- 9  Sowter, J.B.: Dental laboratory technology: prosthodontic techniques. Chapel Hill, University of North - 10 Sowter,  .Carolina; 1968 Watt, D.M. and Mac Gregor, A.R.: Designing complete dentures. Philadelphia, W.B. Sounders;-11 .1976 Winkler, S.: Essential of complete Denture Prosthodontics. 2nd ed. PSG Publishing- 12  .Company; 1988 Zarb, G.A.; Bolender, C.L.; HicKey, J.C. and carlesson, G.E.: Bouchers Prothodontic- 13  .Treatment for Edentulous Patients. 7th. Ed. St-Louis, The C.V.Mosby Company; 1990 .N, B. All pictures in these slides are copied from the above references and from the internet 08/29/12 D.SIRAG EDDIN AL-HAMADI 59