Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Dental Ceramics

No description
by

Kaveh Zolfagharnasab

on 29 December 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Dental Ceramics

Y-TZP
Chemical and dimensional stability
High mechanical strength
Fracture-toughness
Transformation Toughening
Radiopacity

Transformation Toughening
Zirconia
Yttrium oxid
Dental Ceramics
Esthetic Ceramic
(High Glass)
Aluminosilicate Glass (Feldespathics)
Leucite
Structural Ceramics
(Low Glass)
Special Silicate Glass
Lithium Disilicate
No Glass Content
(polycrystalline)
Alumina/Zirconia
Yttrium,Cerium,Aluminum (3-5%)
(Transformation Toughening)
IPS Empress
IPS e.max
Kaveh Zolfagharnasab
Supervised By : Dr.S.Habibzadeh
Zirconia Restorations
High initial Flexural Strength and
Fracture Toughness
Indications
Single crowns
3-unit bridges
4,5,6-unit bridges
Curved and long-span bridges (8-unit bridges)
Cantilever bridges (excluded for patients with bruxism)
Anterior adhesive bridges (excluded for patients with bruxism)
Implant abutments
Healing cap
Contraindications
Heavy occlusal forces
Limited interocclusal distance
Deep subgingival prep.
Inability to maintain dry field
Advantages
Esthetics
Wear resistance
Precise contour and contact
Biocompatibility
Does not corrode
Low thermal conductivity
mask underlying discolorations
Disadvantages
Cost & time
Brittleness of the ceramics
wear of opposing dentition and restorations
Low repair potential
Difficult intraoral polishing
Relatively opaque when compared to other indirect restorative materials
Tooth prep. guidelines
• Uniform, circumferential, tooth reduction of 1.0-1.5 mm
• Circumferential chamfer
• Occlusal reduction of 1.5-2.0 mm
• Rounded line angles
• Reduce linguals of anteriors with football diamond
to create concave lingual
WHY?
• Uniform reduction results in optimum ceramic strength
• Adequate reduction leads to better esthetics
• Smooth edges result in lower stress
• Lower stress decreases potential for fracture
• Ceramic restorations require a passive fit
• Scanners read smooth preparations more accurately
Anterior Prep.
• Incisal Reduction - Long Round End Taper, Medium or Coarse
• Facial Reduction - Long Round End Taper, Medium or Coarse
• Interproximal - Long Round End Taper, Medium or Coarse
• Ligual Reduction - Football, Medium or Coarse
• Rounding Corners - Long Round End Taper, Fine
• Margin Finish - End Cut, Fine
Posterior Prep.
• Occlusal Reduction - Wide Chamfer, Barrel or Football, Medium or Coarse
• Axial Wall Reduction - Narrow Chamfer, Medium or Coarse
• Interproximal - Long Round End Taper, Medium or Coarse
• Rounding Corners - Long Round End Taper, Fine
• Margin Finish - End Cut, Fine
Transformation Toughening
Cercon , Procera
Manufacturing
Survival Rate
Impression & Cementation
Finish Line
Zirconia: cementation of prosthetic restorations. Literature review
M. GARGARI, F. GLORIA, E. NAPOLI, and A.M. PUJIA
common surface treatments (silanization, acid etching) are
ineffective
on zirconia because it has an inert surface without glassy component (on which this surface treatments act primarily).
sandblasting at 1atm with
aluminium oxide (Al2O3)
results significantly effective for the resulting roughening that increase the surface energy and the wettability of the material.

zinc phosphate-based
cements,
Bis-GMA-based
and
glass-ionomer
cements can’t guarantee a stable long-term adhesion, instead
resin cements
containing phosphate monomer 10-methacryloyloxyidecyl-dihyidrogenphosphate (
MDP
) have shown higher adhesion and stability values than the other cements.
Shoulder
Rounded Shoulder
Heavy Chamfer

the four-year survival rate was 92% for cantilever zirconia-based FPDs.
The four-year survival rate was 98% for single zirconiacrowns and 96% for zirconia-based FPDs.
Full transcript