[Crown & Bridges] [terminology & classification]

2
Terminology and
Classifications of
Fixed Prosthodontics
Faculty of Dentistry
Conservative Dentistry Department
Fixed Prosthodontics Staff members
Dr. Mohamed Ghazy.
Dr. Ahmed Attia.
Dr. Manal Abo-madina.
Dr. lamia Dawood .
Dr. Shaymaa Aboelfadl

3
Crown & Bridge Course 2012/ 2013
Will run over 2 semesters, including:
 A series of lectures
 Practical work including demos and Lab work in fixed
prosthetics lab.
 No clinical work, yet!
 Final practical work 30 Degree
 Oral exam 15 Degree
 Half term exam + preclinical requirements 15 Degree
 A final end of year qualifying paper 60 Degree
Prosthodontics
The dental specialty concerned with the
making of artificial replacements for
missing parts of the mouth and jaw.
Called also Prosthetic dentistry or Prosthodontia.
Fixed Prosthodontics
The branch of Prosthodontics that
concerned with replacement and /or
restoration of teeth by artificial
substitutes that are not readily removed
by the patient from the mouth

4
Implant Prosthodontics
 That phase of
prosthodontics
concerning the
replacement of missing
teeth and/or associate
structures by restorations
that are attached to dental
implants.
Clinical crown
 The portion of tooth that
extended from the occlusal
table or incisal edge to the
free gingival margin.
Anatomical crown
 The portion of tooth that
extended from the occlusal
table or incisal edge to
cemento - enamel junction.
Artificial crown
 Artificial replacement that
restore missing tooth structure
by surrounding part or all of the
remaining tooth with a material
such as metal, ceramic or
combination.
CEMENTUM
GINGIVA
ENAMEL

5
mghazy2002@yahoo.com
Temporary Crown:
It is a crown made and used
temporarily for the protection of
the prepared tooth till the final
crown or bridge is completed and
ready for cementation.
The restoration material may be metal,
ceramic or combination
Complete (Full) veneer crown
A restoration that covers all of the
tooth clinical crown surfaces (mesial
, distal, facial, lingual and occlusal).
Full veneer gold crownMetal ceramic crown

6
Partial veneer crown:
Extra-coronal cast
metallic restorations
that covers portion of
prepared clinical crown:
e.g. ¾ crowns
7/8 crowns
½ crowns
Pin ledge crowns
Three Quarter Crowns:
Restore the occlusal and three
of the four axial surfaces not
including the facial surface.
Reverse Three Quarter
Crowns:
Restore all surfaces except the
lingual surface.
Seven- Eights Crown:
Is a modified type of the three
quarter crown extend to include a
portion of the facial surface, except
the mesial half of the buccal
surface of maxillary molars .

7
One – half crown:
Restore the occlusal and mesial
surfaces, as well as portion of the lingual
and buccal surfaces. It is a modified form
of the three quarter crown.
MacBoyle retainer :
Is a modified type of the three quarter
crown, with its retention derived from
grooves at the labio- proximal line
angles usually used for mandibular
anterior incisors.
Pinledge retainer:
Is a modified type of an anterior
three quarter crown that obtain its
retention from long parallel pins in the
lingual or palatal surfaces of the clinical
crown.
Laminates
Are veneer restoration that
restore the facial surface of the
tooth for esthetic purposes.
They are fabricated from resin or
dental ceramic. They are bonded
to etched enamel with resin
cement.
Resin- bonded restoration :
it is a cast partial veneer
restoration that are bonded to
etched enamel.

8
Inlay retainer:
It is a classical
intracoronal restoration that
restore the proximal and
occlusal surfaces but does
not protect or cover the
cusps entirely.
Onlay retainer:
It is a modification of the
inlay with cusps overlays on
the occlusal surface to
protect the integrity of the
remaining tooth structure.
Classification of crowns
Full coverage Partial coverage
Grooves
Pins, pin-ledge retainer
Enclsping the preparation
Encircling the preparation
Combined
Combined
Metallic
Combined
Non metallic
One piece
Tow piece
veneered
Full veneered
Porcelain
Acrylic
Posts in the root canal
Retained by posts or post &core
Posterior post attached or detached
Materiall mettalic, ceramic or combined
¾ crown
1/2 crown
7/8 crown
MacBoyle crown

9
according to material
According to material
 Metallic
 Non metallic
 Combined
According to site
 Anterior
 Posterior

10
Abutment
 Is a natural tooth or portion
of tooth, or dental implant
that supports and/or retains
a prosthesis.
Fixed dental prosthesis
{bridge}
 A partial denture that is
luted or otherwise securely
retained to the natural teeth,
tooth roots, and/ or dental
implant abutments that
furnish the primary support
for the prosthesis.
Fixed dental prosthesis {bridge}
A partial denture that is luted or otherwise securely retained to the natural
teeth, tooth roots, and/ or dental implant abutments that furnish the
primary support for the prosthesis.
Retainer
The part of Fixed dental prosthesis that
units the abutment {s} to the
remainder of the restoration.
 Connector
A portion of Fixed dental prosthesis that
units the retainer {s} to the pontic.
 Pontic
An artificial tooth on a Fixed dental
prosthesis that replaces a missing
natural tooth, restore its functions, and
usually fill the space previously filled
by the natural crown.

11
Fixed dental prosthesis (FPD)
= “Bridge” = “Fixed prosthesis”
Pontic = replaces lost tooth
Retainers fit over prepared teeth
Classification of Fixed dental prosthesis
According to site
 Anterior
 Posterior
 Complex

12
According to material
 Metallic
 Non metallic
 Combined
According to mode of retention
 Fixed – fixed
 Fixed- supported
 Removable bridge
 Cantilever bridge
 Spring cantilever
 Resin bonded FPD
 Implant supported

13
1- Fixed- Fixed bridge:
It is a bridge where the
abutments and the pontics are all
soldered together and the bridge
is cemented at both ends to the
abutments.
2- Fixed- supported
bridge:
It is a bridge which is not
actually joined to one of the
terminal abutment teeth but is
connected to it by means of a
non rigid connector allowing
some individual movement of the
abutment tooth.
Removable bridge:
It is a bridge where each retainer consists of two parts.
One fixed to the abutment tooth.
And one soldered to the pontic and the bridge can be
removed at the will of and by the patient for cleansing
purposes.

14
Cantilever bridge:
It is a bridge where the pontic
is fixed to and derives its
support from one or double
retainers at one end only
while the other end is
unsupported.
Spring Cantilever Bridge:
It is a cantilever bridge where
the pontic is at the end of
resilient curved arm deriving
its support from an abutment
remote from the edentulous
space

15
Placement of the implant. Gum tissue sutured
over the implant. It
will take 4 -6
months for the
implant to fuse
with the bone
Temporary
crown boned
to adjacent
teeth during
the healing
phase.
Dental material used in fixed Prosthodontics
 Direct restorative filling
– Amalgam
– glass ionomer
– Composite
– Compomer
 Impression materials
– Irreversible hydrocolloids
(alginate)
– Reversible hydrocolloids
(agar agar)
– Rubber base impression
material
 Polysulfide
 Polyvinylsiloxane
 Poly ether
 Material used for
laboratory procedures
– Gypsum product
– Wax
– Custom tray material
 Cements
– Zinc phosphate
– Glass-ionomer
– Composite resin
 Material used for extra
coronal restoration
– Direct casting alloys
– Ceramic
– Polymer acrylic

16
Extra coronal restorations
Full coverage
Partial coverage
Intra coronal restoration
Direct filling materials
Gold
Amalgam
Composite
Glass ionomer
Compomer
Inlays and onlays
Gold
Ceramic
Porcelain laminate veneer

20
Prosthodontic Motto
I hear, I forget
I see, I remember
I touch, I understand
Chinese Proverb
Crown Fabrication
 1. Tooth Preparation, Including Build-Up
 2. Impression
 3. Temporization
 4. Model (Cast) and Die Fabrication
 5. Wax-Up
 6. Investing and Casting
 7. Crown Adjusting and Polishing
 8. Clinical Try-In and Cementation

23
Build-Ups
Pin Retained
Preformed Posts
Custom Cast Post and Core
Build-Ups
Pin Retained

24
Build-Ups
Preformed Posts
Build-Ups
Custom Cast Post and Core

25
Temporaries
 Custom made
acrylic
 Relined
polycarbonate
crowns
 Preformed metal
crowns
Impressions
 Full arch
impressions
 Double bite
impressions

26
Model (Cast) and Die Fabrication
Restorations

28

29
Pouring the impression with Gypsum
Products
Proportion P and L
Transfer to impression
Microstone
GYPSUM PRODUCTS:
• Plaster
• Stone, Cast Stone
• Improved Stone, Die Stone
Specialty Stones
Investment Materials
Edentulous
Cast
Orthodontic
Model
Working
Cast
Working
Cast with
Removable
Dies
Removable
Die with
Waxed Inlay

36

38
Overview of INDIRECT RESTORATIONS
• Impressions
• Models/Casts
• Waxing
• Investing
• Casting
• Finishing/Polishing
• Cementing

40
PFM FABRICATION
Text Book and Readings
Contemporary Fixed Prosthodontics
–SF Rosenstiel, MF Land , J Fujimoto
Fixed prosthodontics notes
–Cairo university

41
"Each time you are honest and
conduct yourself with
honesty, a success force will
drive you toward greater
success. Each time you
lie, even with a little white lie,
there are strong forces
pushing you toward failure."

43
Front surface mirrors

44

45

47
Removable Fixed dental
prosthesis
A crown is
an artificial replacement that restores
missing tooth structure by surrounding
most or all of the remaining structure
with a material such as cast metal or ceramic
or combination.
It is intended to reproduce both the form
and function of the tooth and in some instance
to restore or enhance the appearance

48

49

50
Further developed and refined.
Sure Hold - Easy Operation
W&H Press-button Chuck
Improvements:
Bur gripping power
+ 50 %
Pressing power - 10 %
• Best possible cooling
• 80 ml of water per minute
• Optimized air/water mixture
A cool performance.
Refreshing Performance
Triple Spray with TA-98 L / TA-98

51
Crown
•An artificial replacement
that restores missing tooth
structure by surrounding
all of the remaining
structure with a material
such as cast metal,
porcelain, or a combination
of materials such as metal
and porcelain.

52
Inlays and Onlays
A tooth with a large filling (left)
before preparation for onlay and a
tooth with a slightly smaller filling
(right) before preparation for an
inlay.
A tooth with a large filling (left)
after preparation for onlay and a
tooth with a slightly smaller
filling (right) after preparation
for an inlay.

53
The onlay and inlay are
prepared on a plaster model
of the teeth.
The onlay and inlay have
been fitted. The onlay covers
more than the inlay.

[Crown & Bridges] [terminology & classification]

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to [Crown & Bridges] [terminology & classification]

Similar to [Crown & Bridges] [terminology & classification] (20)

More from Ahmed Elhlawany

More from Ahmed Elhlawany (20)

Recently uploaded

Recently uploaded (20)

[Crown & Bridges] [terminology & classification]