ESTHETICS POST SYSTEMS

INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com
www.indian...
contents
 Introduction
 Effects of endodontic treatment on teeth
 Considerations for anteriro and posterior
teeth
 Req...









Factors affecting retention of posts
Classification of esthetic post systems
Properties of fiber post sys...
Intr oduction

www.indiandentalacademy.com
Effect of endodontic
treatment on teeth
 Tooth structure after endodontic
treatment weakened by previous
episodes of


...
 Loss of tooth structure
 Altered physical characteristics
 Altered esthetic characteristics

www.indiandentalacademy.c...
considerations
 Anterior teeth
 Intact , non-vital , has not lost tooth
structurebeyond access cavity preperation
Less r...
considerations
 Anterior teeth
 Intact , non-vital , has lost significant
tooth structure
More risk of fracture
crown re...
 Posterior teeth
 Depends on remaining tooth structure
 If adeqaute tooth structure present , core
and crown is suffici...
www.indiandentalacademy.com
Requirements of post
and core
Physical properties similar to dentine
Maximum
Retention with little removal of dentin
Distr...







Resistance to displacement,
Good core retention,
Easy retrievability,
Material compatibility with core,
Ease ...
Key features for a
succesful post and core
design

www.indiandentalacademy.com
Factors determining
selection of posts
 Root length
 Greater the post
length, the better the
retention and stress
distri...
 Tooth anatomy
 A consideration of the root size and length is
important, because improper post space
preparation and us...
 Post width
 Preserving tooth structure, reducing the
chances of perforation, and permitting the
restored tooth to resis...
Lloyd PM, Palik JF. The philosophies of
dowel diameter preparation: a literature
review. J Prosthet Dent 1993;69:32-6.

 ...
 Canal configuration and post adaptability
 Canal configuration aids in making a choice
between a custom-designed post a...
 Coronal structure
 The bulk of the tooth above the restorative margin
should be at least 1.5 to 2 mm to achieve resista...
 Carbon fiber post system, can be used
when ample coronal dentin remains and
the crown is well supported by remaining
too...
 Stress
 Post and core–restored endodontically
treated teeth are subjected to various types
of stresses:
 compression,
...
 Torsional forces
 Intraorally, post and core–restored teeth are
subjected to various types of forces.
Torsional forces ...
 Role of hydrostatic pressure
 Cementation plays a significant role in
enhancing retention, stress distribution, and
sea...
 Post design
 Classified according to shape design and surface
characteristics.
 According to shape design
Parallel sid...
 Post material




Metal post systems
Carbon fiber posts
Zirconia posts

www.indiandentalacademy.com
(Mannocci E, Ferrari M, Watson TF. Intermittent loading
of teeth restored using quartz fiber, carbon-quartz fiber
and zirc...
 Core material
 Retrievebility
 Esthetics

www.indiandentalacademy.com
Factors affecting the
retention of posts
 Post length
 The post should equal the incisocervical
or occlusocervical dimen...
 Post diameter
 Increasing the diameter of the post does not provide
a significant increase in the retention of the post...
 Luting cements
 Resistance form
 Stress distribution
 Rotational resistance

www.indiandentalacademy.com
Ferrule effect

www.indiandentalacademy.com
Classification of
esthetic posts
 Polyethylene fiber posts
 Ribond

 Glass fiber posts
 Fibrekor posts (Generic Pentro...
 Quartz fibers bound in an epoxy matrix




D T Light post (Bisco Usa)
Astheti Plus posts
Light posts

 Ceramic posts...
 Indirect method
 Split casting technique (Inceram posts)
 Copy milling technique (In ceram Celay posts)
 Two Piece te...
Thank you
www.indiandentalacademy.com
Leader in continuing dental education

www.indiandentalacademy.com
Upcoming SlideShare
Loading in …5
×

Esthetic post systems /certified fixed orthodontic courses by Indian dental academy

3,766 views

Published on

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.

0 Comments
8 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
3,766
On SlideShare
0
From Embeds
0
Number of Embeds
4
Actions
Shares
0
Downloads
1
Comments
0
Likes
8
Embeds 0
No embeds

No notes for slide

Esthetic post systems /certified fixed orthodontic courses by Indian dental academy

  1. 1. ESTHETICS POST SYSTEMS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. contents  Introduction  Effects of endodontic treatment on teeth  Considerations for anteriro and posterior teeth  Requirements of posts  Key features of post and core design  Factors affecting selection of posts www.indiandentalacademy.com
  3. 3.         Factors affecting retention of posts Classification of esthetic post systems Properties of fiber post systems Clinical techniques Cementation Summary Conclusion references www.indiandentalacademy.com
  4. 4. Intr oduction www.indiandentalacademy.com
  5. 5. Effect of endodontic treatment on teeth  Tooth structure after endodontic treatment weakened by previous episodes of     Fracture Tooth preparation Restoration Endodontic manipulation www.indiandentalacademy.com
  6. 6.  Loss of tooth structure  Altered physical characteristics  Altered esthetic characteristics www.indiandentalacademy.com
  7. 7. considerations  Anterior teeth  Intact , non-vital , has not lost tooth structurebeyond access cavity preperation Less risk of fracture Sealing the access cavity www.indiandentalacademy.com
  8. 8. considerations  Anterior teeth  Intact , non-vital , has lost significant tooth structure More risk of fracture crown retained by dowel and core www.indiandentalacademy.com
  9. 9.  Posterior teeth  Depends on remaining tooth structure  If adeqaute tooth structure present , core and crown is sufficient  If inadeqaute, post and core with crown necessary www.indiandentalacademy.com
  10. 10. www.indiandentalacademy.com
  11. 11. Requirements of post and core Physical properties similar to dentine Maximum Retention with little removal of dentin Distribution of functional stresses evenly along the root surface,  Esthetic compatibility with the definitive restoration and surrounding tissue,  Minimal stress during placement and cementation,     www.indiandentalacademy.com
  12. 12.       Resistance to displacement, Good core retention, Easy retrievability, Material compatibility with core, Ease of use, safety and reliability, Reasonable cost. www.indiandentalacademy.com
  13. 13. Key features for a succesful post and core design www.indiandentalacademy.com
  14. 14. Factors determining selection of posts  Root length  Greater the post length, the better the retention and stress distribution  Reserve 3 to 5mm of apical gutta-percha to maintain the apical seal www.indiandentalacademy.com
  15. 15.  Tooth anatomy  A consideration of the root size and length is important, because improper post space preparation and use of large-diameter posts present the risk of apical or lateral perforation.  An active post can initiate cracks in the thin dentinal wall www.indiandentalacademy.com
  16. 16.  Post width  Preserving tooth structure, reducing the chances of perforation, and permitting the restored tooth to resist fractures are criteria in selection of the post width www.indiandentalacademy.com
  17. 17. Lloyd PM, Palik JF. The philosophies of dowel diameter preparation: a literature review. J Prosthet Dent 1993;69:32-6.  Selection of post width sumarised by Lloyd and palik into 3 categories  Conservationist  Preservationist  Proportionist www.indiandentalacademy.com
  18. 18.  Canal configuration and post adaptability  Canal configuration aids in making a choice between a custom-designed post and a prefabricated post  If post confirms to the shape of the canal closly  more conservative procedure  more resistance to fracture www.indiandentalacademy.com
  19. 19.  Coronal structure  The bulk of the tooth above the restorative margin should be at least 1.5 to 2 mm to achieve resistance form.  Teeth restored with carbon fiber posts had inferior strength compared with those restored with metal posts when subjected to forces simulating those in a clinical setting  (Sidoli GE, King PA, Setchell DJ. An in vitro evaluation of a carbon fiber based post and core system. J Prosthet Dent 1997;78:5-9.) www.indiandentalacademy.com
  20. 20.  Carbon fiber post system, can be used when ample coronal dentin remains and the crown is well supported by remaining tooth structure; otherwise, cast post and core may be used when there is moderate to severe tooth loss. www.indiandentalacademy.com
  21. 21.  Stress  Post and core–restored endodontically treated teeth are subjected to various types of stresses:  compression,  tensile, and shear  An increase in the post length with diameter kept to a minimum will help to reduce shear stresses and preserve tooth structure www.indiandentalacademy.com
  22. 22.  Torsional forces  Intraorally, post and core–restored teeth are subjected to various types of forces. Torsional forces on the post-core-crown unit may lead to loosening and displacement of the post from the canal, causing failure of the system www.indiandentalacademy.com
  23. 23.  Role of hydrostatic pressure  Cementation plays a significant role in enhancing retention, stress distribution, and sealing irregularities between the tooth and the post www.indiandentalacademy.com
  24. 24.  Post design  Classified according to shape design and surface characteristics.  According to shape design Parallel sided Tapered Parallel tapered combination According to surface characteristics    Active and passive www.indiandentalacademy.com
  25. 25.  Post material    Metal post systems Carbon fiber posts Zirconia posts www.indiandentalacademy.com
  26. 26. (Mannocci E, Ferrari M, Watson TF. Intermittent loading of teeth restored using quartz fiber, carbon-quartz fiber and zirconium dioxide ceramic root canal posts. J Adhes Dent 1999;1:153-8.)  Bonding ability  Resin luting agents showed good adhesion to carbon  Fiber posts and glass fiber posts.69 The adhesion to zirconia posts was found to be unsatisfactory.69 It was also observed that to improve retention, the carbon fiber post did not require any surface treatment as compared with the zirconia post. www.indiandentalacademy.com
  27. 27.  Core material  Retrievebility  Esthetics www.indiandentalacademy.com
  28. 28. Factors affecting the retention of posts  Post length  The post should equal the incisocervical or occlusocervical dimension of the crown.  The post should be as long as possible without disturbing the apical seal  Short posts are especially dangerous and have a much higher failure rate www.indiandentalacademy.com
  29. 29.  Post diameter  Increasing the diameter of the post does not provide a significant increase in the retention of the post; however, it can increase the stiffness of the post at the expense of the remaining dentin and the fracture resistance of the root.  post diameter must be controlled to preserve radicular dentin, reduce the potential for perforations, and permit the tooth to resist fracture www.indiandentalacademy.com
  30. 30.  Luting cements  Resistance form  Stress distribution  Rotational resistance www.indiandentalacademy.com
  31. 31. Ferrule effect www.indiandentalacademy.com
  32. 32. Classification of esthetic posts  Polyethylene fiber posts  Ribond  Glass fiber posts  Fibrekor posts (Generic Pentron)  Carbon fiber posts  Composipost  C – Post systems www.indiandentalacademy.com
  33. 33.  Quartz fibers bound in an epoxy matrix    D T Light post (Bisco Usa) Astheti Plus posts Light posts  Ceramic posts  Direct method  Cerapost (Lemgo, Germany) www.indiandentalacademy.com
  34. 34.  Indirect method  Split casting technique (Inceram posts)  Copy milling technique (In ceram Celay posts)  Two Piece technique (ER – Post systems, Brassler Germany)  Heat preassure technique  Cosmopost (Ivoclar) www.indiandentalacademy.com
  35. 35. Thank you www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com

×