The document discusses different techniques for creating working casts with removable dies, including straight and curved dowel pins, pindex systems, and Di-Lok trays. Removable dies allow the fabrication of wax patterns on individual teeth and must return to their exact positions to ensure accurate articulation. Proper die preparation, such as trimming without reducing access or altering contours, is important for producing casts that facilitate wax pattern fabrication.
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A STEP IN CASTING OF CAST PARTIAL DENTURE, a precious duplication process and proper wax up of refractory cast results in accurate fitting of the framework of the prosthesis.
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A STEP IN CASTING OF CAST PARTIAL DENTURE, a precious duplication process and proper wax up of refractory cast results in accurate fitting of the framework of the prosthesis.
Presented by
NAVEEN GOKUL R,
CRI (2023) CARNAZZIANZ,
DEPARTMENT OF PROSTHODONTICS,
PRIYADARSHINI DENTAL COLLEGE - TN
Stents GPT 9th ed - Any supplementary device used in conjunction with a surgical procedure to keep a skin graft in place, often modified with acrylic resin or dental modeling plastic impression compound .
Splints - GPT 9th ed
A rigid or flexible device that maintains in position of a displaced or movable part; also used to protect and assists in stabilization and immobilization of an injured part.
CONTENTS:
INTRODUCTION
DEFINITION –STENTS
MATERIALS USED FOR STENTS
FUNCTIONS OF STENTS
TYPES OF STENTS
DEFINITION –SPLINTS
MATERIALS USED FOR SPLINTS
FUNCTIONS OF SPLINTS
TYPES OF SPLINTS
RECENT ADVANCEMENTS IN STENTS AND SPLINT THERAPIES
all the techniques used in completedenture fabrication in condition like flabby tissue and resorbed rigdes plus patients having problem of gag. it includes various pictures and procedure of impression techniques.
Failures in Fixed Partial Denture
(Prosthodontics FPD- Dental science)
Various types of failures in the fabrication of fixed partial denture
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
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center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Presented by
NAVEEN GOKUL R,
CRI (2023) CARNAZZIANZ,
DEPARTMENT OF PROSTHODONTICS,
PRIYADARSHINI DENTAL COLLEGE - TN
Stents GPT 9th ed - Any supplementary device used in conjunction with a surgical procedure to keep a skin graft in place, often modified with acrylic resin or dental modeling plastic impression compound .
Splints - GPT 9th ed
A rigid or flexible device that maintains in position of a displaced or movable part; also used to protect and assists in stabilization and immobilization of an injured part.
CONTENTS:
INTRODUCTION
DEFINITION –STENTS
MATERIALS USED FOR STENTS
FUNCTIONS OF STENTS
TYPES OF STENTS
DEFINITION –SPLINTS
MATERIALS USED FOR SPLINTS
FUNCTIONS OF SPLINTS
TYPES OF SPLINTS
RECENT ADVANCEMENTS IN STENTS AND SPLINT THERAPIES
all the techniques used in completedenture fabrication in condition like flabby tissue and resorbed rigdes plus patients having problem of gag. it includes various pictures and procedure of impression techniques.
Failures in Fixed Partial Denture
(Prosthodontics FPD- Dental science)
Various types of failures in the fabrication of fixed partial denture
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
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Dentistry, Periodontics and General Dentistry.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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Casting procedures are the backbone of indirect restorations. No casting can be fabricated with their casting defects. It is necessary to have the knowledge of casting defects , how they occure, and how to prevent them.
INTRODUCTION- Removable partial denture: the replacement of missing teeth and supporting tissues with a prosthesis designed to be removed by the wearer-GPT.
Cast partial denture is a type of partial denture comprising a cast metal framework with acrylic resin prosthetic teeth.
Traditional acrylic partial dentures are less durable, retentive, and stronger than cast partial dentures.
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3. WORKING CAST
is the cast that is
mounted on an
articulator. To provide
the most accurate
articulation, it
normally should
represent the entire
arch
4. REQUIREMENTS FOR GOODREQUIREMENTS FOR GOOD
CASTSCASTS
1. bubble free1. bubble free
especially along the finish lines of theespecially along the finish lines of the
prepared teeth.prepared teeth.
2. distortion free.2. distortion free.
3. trimmed3. trimmed
to insure access for carving wax patternto insure access for carving wax pattern
margins.margins.
6. WORKING CAST WITH A SEPARATE
DIE
disadvantages
wax pattern must be transferred from one to the
other
internal adaptation
obtained from
separate impressions
pouring an elastomeric full-arch impression twice
first cast is used for fabrication of the die
18. IF A REMOVABLE DIE SYSTEM IS
USED, IT SHOULD SATISFY THESE
REQUIREMENTS17
The dies must return to their exact original
positions.
2. The dies must remain stable, even when
inverted.
3. The cast containing the dies must be easy to
mount on an articulator
19. WORKING CAST WITH A
REMOVABLE DIE
Most of these devices
can either be oriented
in the impression
before it is poured
attached to the
underside of a cast
that has already been
poured
prepour technique post-pour technique
20. WORKING CAST WITH A
REMOVABLE DIE
1. Straight dowel pin
2. Curved dowel pin
3. Pindex system
4. Di-Lok tray
5. Accutrac
30. curved dowel (A),
positioning bar (B),
straight pins (C)
first pour of die stone
(D) to the impression
Depressions are made
about 2.0 mm deep on
either side of the
dowels in the two large
segments of the cast
that will carry the
unprepared teeth
CURVED DOWEL PIN
31. coat of petrolatum is
applied to stone & dowels
Boxing wax with the tips
of the dowels sticking
CURVED DOWEL PIN
32. CURVED DOWEL PIN
The completed cast is
sawed
Segment is removed by
pressing on the exposed tip
34. CEMENTED CURVED PIN
The working cast is trimmed
to receive cemented dowels
Holes are drilled into the underside of
the cast, under the indicated locations
42. PINDEX SYSTEM
Pencil marks are placed
under illuminated dot
The thumbs are used to
stabilize the cast while
lifting the handle bar
with the fingers.
43. PINDEX SYSTEM
Debris is removedDebris is removed pin holes refinedpin holes refined
Shorter pins 1stShorter pins 1st Cyanoacrylate cementCyanoacrylate cement
44. PINDEX SYSTEM
White sleeves > long pinsWhite sleeves > long pins bottom of cast is lubricatedbottom of cast is lubricated
Utility wax > long pins.Utility wax > long pins. gray sleeves are blockedgray sleeves are blocked
45. PINDEX SYSTEM
A palatal/tongue fillerA palatal/tongue filler The filler is placed on theThe filler is placed on the
castcast
Boxing waxBoxing wax The filler is seated to theThe filler is seated to the
castcast
46. PINDEX SYSTEM
Microstone is pouredMicrostone is poured The base former filledThe base former filled
Model seated to base formerModel seated to base former Stone is vibrated on bottomStone is vibrated on bottom
47. PINDEX SYSTEM
Wax over the long pins isWax over the long pins is
removed.removed.
The sawThe saw cuts are premarkedcuts are premarked
Dies are sectioned from theDies are sectioned from the
undersideunderside
The cast is removed by tappingThe cast is removed by tapping
the pinsthe pins
48. PINDEX SYSTEM
Dies may also sectioned from
the occlusal
A large condenser also be
used to loosen
cast should be poured in a U
shape, no stone in the center.
The completed cast on the
articulator
49. PINDEX SYSTEM
The lingual side of the cast base
is trimmed with an arbor band.
Horizontal grooves are cut in
the base to give it retention
51. DI-LOK TRAY
The cast is placed into stone
in the tray
Disassembly of the cast.
A saw cut is made on each
side of the prepared tooth
The cast is loosed by tapping
on the front of the base
52. DI-LOK TRAY
The prepared tooth is broken
free from the cast
die is trimmed
The cast and tray mounted on
the articulator
The cast and die(s) are
reassembled in the tray