1. Complete Dentures
Appointment 2
Final
Impressions

3. Introduction
•Trays
•Border molding
•Making Impression
•Post-Dam

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

12. Finished Mandibular Trays

13. Triad Trays
Adapt tray material to casts
and trim any excess material.

14. Triad Tray Finished

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...

44. ...then the other.

45. Finish with the postpalatal seal.

46. Border-Molded Maxillary Tray

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.

68. Procedure
FUNCTIONAL MOVEMENTS

69. Mandibular Impression

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

76. Polyvinylsiloxane Impression

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.

102. Procedure
Reinsert Impression.

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