STEPS OF RPD CONSTRUCTION

1
STEPS OF RPD CONSTRUCTION
2
STEPS OF CONSTRUCTION

1. EXAMINATION
2. PRIMARY IMPRESSION
3. POURING PRIMARY CAST
4. PRIMARY SURVEYING
5. MOUTH PREPARATION
6. FINAL IMPRESSION
7. POURING MASTER CAST

3

1. SURVEYING THE MASTER CAST
2. DRAW THE DESIGN
3. PREPARING MASTER CAST FOR DUPLICATION
4. DUPLICATION
5. POURING REFRACTORY CAST
6. DRAWING DESIGN
7. MAKE WAX PATTERN AND SPRUE

4

1. INVESTING AND CASTING
2. FINISHING AND POLISHING
3. METAL FRAMEWORK TRYIN
4. BITE REGISTRATION
5. ACRYLIC TEETH TRYIN
6. PROCESSING OF ACRYLIC
7. FINISHING AND POLISHING.

5
Cross Arm with Spindle Housing
The Vertical Spindle With Tool Holder
Tool Holder
Surveyor
Vertical Upright Column
The Surveyor Table
The Horizontal Base
6
SURVEY LINE
NON UNDECUT AREA
Carbon Marker
UNDERCUT AREA
HEIGHT OF CONTOUR
7
SURVEYED MASTER CAST
8
PREPARATION OF MASTER CAST
Wax Trimmer
9
Waxing the master cast

• 1- Blocking-out the undesirable undercuts
• A- Paralleled blockout

• Proximal tooth surfaces to be used as guiding
  planes
• Beneath all minor connectors
• Tissue undercuts to be crossed by rigid
  connectors
• Tissue undercuts to be crossed by origin of bar
  clasps
• Deep interproximal spaces t

10

• B- Shaped blackout

• Ledges for location of reciprocal clasp
• Ledges for location of retentive clasp arms

11

• C- Arbitrary blockout (Smoothed arbitrarily with
  wax spatula

• All gingival crevices
• Gross tissue undercuts
• Labial and buccal tooth and tissue undercuts not
  involved in denture design

12

• 2-Relief
• Beneath lingual bar
• Areas in which major connectors will contact,
  thin tissue
• Beneath framework extension onto ridge areas for
  attachment of resin bases

• 3-Tissue Stops
• Two small squares of 2 mm, usually an anterior
  and posterior, of relief wax is removed at the
  distal end the edentulous ridge

13

• 4-Formation of internal finishing lines
• are carved in the relief wax covering the
  edentulous ridge at the metal resin junction.
  This line is trimmed with blade held at 900 to
  the cast surface in order to produce a sharp
  junction having a uniform depth of at least 1mm.

14
(No Transcript)
15
Duplicating flask
opened
closed
16
Duplication of the master cast
17
REFRACTORY CAST
18
(No Transcript)
19
PENCIL OUTLINE ON CAST
20
WAX FRAMEWORK
21
(No Transcript)
22
FILLING OF BEADED AREAS
23
LAYING SHEET OF WAX
24
(No Transcript)
25
SHEET CUT TO SHAPE
26
SECOND HALF ADAPTED
27
SECTIONS SEALED TOGETHER
28
(No Transcript)
29
POSITION MESHWORK IN PLACE
30
MESHWORK IS TRIMMED
31
FINISH LINE
32
FINISH LINE
33
LEDGE IN REF. CAST
34
ADAPTATION OF WAX IN LEDGE
35
RETENTIVE ARM IN LEDGE
36
RECOPRICAL ARM IN PLACE
37
FILLING OCCLUSALREST WITH WAX
38
FINISHED OCCLUSAL REST
39
CLASP UNIT ATTACHED TO FRAMEWORK
40
GINGIVALLY APPROACHING CLASP
41
OCCLUSAL REST CONNECTED TO MINOR CONNECTOR
42
DISTAL PROXIMAL PLATE
43
FINISHED WAX FRAMEWORK
44
WAX PATTERN
45
WAX PATTERN SPRUED
46
(No Transcript)
47
SECTIONAL VIEW OF WAXING, INVESTING AND SPRUE
48
CASTING AND METAL INGOTS
49
(No Transcript)
50
FINISHED AND POLISHED R.P.D
51
(No Transcript)
52
(No Transcript)
53
METAL FRAME WORK
54
FINISHED DENTURE
55
(No Transcript)
56
(No Transcript)
57
(No Transcript)