Transcript STEPS OF RPD CONSTRUCTION

STEPS OF RPD
CONSTRUCTION
STEPS OF CONSTRUCTION
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EXAMINATION
PRIMARY IMPRESSION
POURING PRIMARY CAST
PRIMARY SURVEYING
MOUTH PREPARATION
FINAL IMPRESSION
POURING MASTER CAST
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SURVEYING THE MASTER CAST
DRAW THE DESIGN
PREPARING MASTER CAST FOR
DUPLICATION
DUPLICATION
POURING REFRACTORY CAST
DRAWING DESIGN
MAKE WAX PATTERN AND SPRUE
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INVESTING AND CASTING
FINISHING AND POLISHING
METAL FRAMEWORK TRYIN
BITE REGISTRATION
ACRYLIC TEETH TRYIN
PROCESSING OF ACRYLIC
FINISHING AND POLISHING.
Cross Arm with Spindle Housing
The Vertical Spindle With Tool Holder
Tool Holder
Surveyor
Vertical Upright Column
The Surveyor Table
The Horizontal Base
SURVEY LINE
NON UNDECUT AREA
Carbon Marker
HEIGHT OF CONTOUR
UNDERCUT AREA
SURVEYED MASTER CAST
PREPARATION OF MASTER CAST
Wax Trimmer
Waxing the master cast:
1- Blocking-out the
undesirable
undercuts:
A- Paralleled blockout:
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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
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B- Shaped blackout
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Ledges for location of
reciprocal clasp
Ledges for location of
retentive clasp arms
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C- Arbitrary
blockout (Smoothed
arbitrarily with wax
spatula
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All gingival crevices
Gross tissue
undercuts
Labial and buccal
tooth and tissue
undercuts not involved in denture
design
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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
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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
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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.
Duplicating flask
opened
closed
Duplication of the master cast
REFRACTORY CAST
PENCIL OUTLINE ON CAST
WAX
FRAMEWORK
FILLING OF BEADED AREAS
LAYING SHEET OF WAX
SHEET CUT TO SHAPE
SECOND HALF ADAPTED
SECTIONS SEALED TOGETHER
POSITION MESHWORK IN PLACE
MESHWORK IS TRIMMED
FINISH LINE
FINISH LINE
LEDGE IN REF. CAST
ADAPTATION OF WAX IN LEDGE
RETENTIVE ARM IN LEDGE
RECOPRICAL ARM IN PLACE
FILLING OCCLUSALREST WITH
WAX
FINISHED OCCLUSAL REST
CLASP UNIT ATTACHED TO
FRAMEWORK
GINGIVALLY APPROACHING
CLASP
OCCLUSAL REST CONNECTED
TO MINOR CONNECTOR
DISTAL PROXIMAL PLATE
FINISHED WAX FRAMEWORK
WAX PATTERN
WAX PATTERN SPRUED
SECTIONAL VIEW OF WAXING,
INVESTING AND SPRUE
CASTING AND METAL INGOTS
FINISHED AND POLISHED R.P.D
METAL FRAME WORK
FINISHED DENTURE