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Impressions1
- 1. Complete Dentures Appointment 2 Final Impressions
- 5. Baseplates Draw outline 2 mm short of periphery. Trim master cast Block out undercuts with wax or putty.
- 6. Border of Mandibular Custom Tray
- 7. Make wax spacers 2 mm cutback 1 thickness wax
- 8. Making a Custom Tray Roll out tray Adapt tray material. material and form a handle.
- 9. 2. Try tray on cast. 3.Observe 1.Trim off the tray excess acrylic. handle.
- 10. Finished Trays Finger Rests Finger rests are placed on trays for severely atrophic mandibles.
- 11. Finished Trays 6-7mm 11-12mm 9-10mm
- 13. Triad Trays Adapt tray material to casts and trim any excess material.
- 15. Finished Tray Wax is left in place until border molding is completed. Tray is cut back Note the size to the 2mm wax and shape of spacer. the handles.
- 16. Tray Extensions Before the final impressions are made ALWAYS check the trays for proper fit and extension.
- 17. Fitting the tray
- 18. Fitting the tray
- 19. Fitting the tray
- 20. Fitting the tray Points to relieve in the mouth.
- 21. Modeling Plastic •Gray or green •Water bath •128-135 F o •Ice
- 22. Armamentarium
- 23. Border Molding Making an impression of the vestibule during function. •Selective pressure
- 24. Fitting the tray
- 25. Temper Always remember to temper the compound in a water bath before placing it in the mouth to avoid serious burns.
- 26. Border Molding •Temper in water bath 3-5 sec. then place in the mouth after removal. •Trim
- 27. Muscle Trimming
- 28. stable. no tray displacement. no tissue impingement.
- 29. Border mold the mandibular tray first. •Less chance of gagging patient. •Patient is more cooperative. •Familiarizes patient with procedure. •Allays apprehension.
- 30. •Start by doing small areas. •Do the critical areas first. •Lingual Frenum • Labial Frenum • Buccal Frenum
- 31. Functional Border Molding Sublingual Roll
- 32. Border Molding Function Check
- 33. Functional Border Molding Buccal Frenum
- 34. Heat with alcohol torch. Temper, then muscle trim again.
- 35. As you gain more skill and become more confident then try the following technique.
- 36. Start by border molding the labial and buccal flanges on the mandibular.
- 37. Do one side of the lingual flange before moving to the other side.
- 38. Move to the other side and finish that side of the lingual flange.
- 39. Finish the lingual frenum area of the mandibular denture by having the pt. thrust out his tongue.
- 40. Heat with alcohol torch to soften selected areas and replace in mouth.
- 41. Remove the wax spacer prior to making impression.
- 42. Border Molding Maxillary Do Anterior First.
- 43. Muscle Trim the maxillary custom tray in the mouth. First do one side...
- 45. Finish with the postpalatal seal.
- 47. Properly Border-molded Maxillary Trays
- 48. Polyether Technique Polyether impression material can also be used for border- molding the final tray.
- 49. Polyether Technique •Advantages •Reduces overextension. •Quick •Disadvantages •Cost •Taste
- 50. Polyether •It is critical that the trays are made correctly. •2mm shy of fornix of vestibules. •2mm thick.
- 51. Polyether Paint on adhesive. Mix impression material.
- 52. Polyether A B A.Load tray with polyether impression material. B. Place tray in mouth. C. Borders of tray are C defined by impression.
- 53. Polyether Follow the same procedure for the maxillary impression. The most obvious difference between the two trays is that the maxillary border molding does not cover the tray.
- 54. Polysulfide
- 55. Impression Polysulfide •Remove Wax •Trim MP •Tray Adhesive
- 56. Final Impression •Ready to make final impression. •Trays are retentive. •Borders are finished.
- 57. Impression •Final impressions are: •Of uniform thickness. •(1mm) •Free of voids. •Contoured over ridge.
- 58. Impression •Possess excellant surface detail. •Not be too thick at the borders (25mm) or overextended.
- 59. Procedure After the border molding is completed the spacer wax is removed and the tray is painted with adhesive.
- 60. Wax spacer is removed.
- 61. Adhesive is painted on.
- 62. ARMAMENTARIUM FOR FINAL IMPRESSION
- 63. Procedure The patient is seated in the upright position. •Mouthwash •Reduce the saliva.
- 64. Procedure The patient is asked to suck on a piece of ice to reduce the function of the palatine glands.
- 65. Procedure Approximately 3-3.5 inches of light body Permalastic is used to make the impression.
- 66. Procedure
- 67. Procedure Loading the impression tray.
- 70. “Show-through” of border molding
- 71. The filled tray.
- 72. Muscle trim.
- 73. Procedure The impression is held in place for 6-8 minutes. •Tissue detail •Voids •Even thickness
- 74. Hold tray in place.
- 75. Other Types of Impressions Zinc Oxide-Eugenol Paste Final Impressions
- 77. COMPLETED FINAL MANDIBULAR IMPRESSION HIGHLY DETAILED REPRODUCTION OF TISSUE SURFACE
- 78. Land Area
- 79. POST DAM
- 80. Advantages •Aids In retention of the upper denture. •Helps control Gagging. •Compensates for processing shrinkage.
- 81. Landmarks •Hamular Notch •Vibrating Line •Midpalatal Suture •Glandular Zone •Fovea Palatina
- 82. Vibrating Line Imaginary line across the posterior part of the palate, marking the division between the moveable and immovable tissues of the soft palate.
- 83. Foveae Palatina Two small pits, one on each side of the mid-line, near the junction of the hard and soft palate.
- 84. Landmarks Fovea Hamular Notch
- 85. Soft Palate House classified the soft palate according to how it drapes.
- 86. House Classifications CLI CLII CLIII
- 87. Soft Palate, Class I 5-10 mm Vibrating line
- 88. Soft Palate: Class II •Area for placement of the post-dam is reduced to 3-5mm. •Most common type found in patients.
- 89. Soft Palate: Class II Vibrating Line 3-5mm Class II
- 90. Soft Palate: Class III •Represents the most limited area. •It usually ranges from 1-3 mm.
- 91. Soft Palate: Class III •It is easiest to locate. •Care should be taken not to overextend the denture.
- 92. Soft Palate: Class III Vibrating line 1-3 mm Class III
- 93. Vibrating Line Located within these areas according to the type of soft palate. The area must be palpated to determine how far the line can be placed.
- 94. Vibrating line Class III Placement Zone CD Bead End of Denture
- 95. Locating the Post-Dam •Dry the area with 4X4 gauze. •Palpate the tuberosity, midpalatal raphae, and hamular nitch.
- 96. Procedure •Mark the hamular notch with sterile ink stick. •Locate by having the patient say ‘Ah’ in short bursts.
- 97. Procedure Palpate and mark the area of the hamular notch.
- 98. Post Dam
- 99. Procedure
- 100. Post-Dam
- 101. Procedure Connect to vibrating line.
- 103. Post-Dam
- 105. Post-Dam
- 106. Post-Dam
- 107. Post-Dam
- 108. Box and Pour •Rim, box, pour, separate, and trim the final cast. •You will need to retrace the marks on the cast so that the post palatal seal is clearly marked.
- 109. Box and Pour Boxing wax should extend 10 mm above impression.
- 110. Box and Pour Finishing land area of maxillary master cast.
- 111. Making a Baseplate Sprinkle Method •Work In sections •sift powder •wet with monomer
- 112. Making a Baseplate Keep wet with monomer to avoid “sugar” look.
- 113. Making a Baseplate Finger Adapted Dough Method Forming resin well in dough stage.
- 114. Making a Baseplate Finger Adapted Dough Method Place dough over cast and adapt it well.
- 115. Making a Baseplate Cure in warm pressure pot @ 20 psi/20 minutes.
- 116. Making a Baseplate Remove from cast and trim off flash.
- 119. Immediate Mandibular CD Boxed Impression and Final Cast