ZIRCONIA BASED ALLZIRCONIA BASED ALL
CERAMICCERAMIC
RESTORATIONSRESTORATIONS
INDIAN DENTAL ACADEMY
Leader in continuing de...
Spectacular smile,a ziphyr….that canSpectacular smile,a ziphyr….that can
beat the oschen and acher in thebeat the oschen a...
ZirconiumZirconium
 Derived from the Arabic word “Zargon”, whichDerived from the Arabic word “Zargon”, which
means golden...
www.indiandentalacademy.comwww.indiandentalacademy.com
Structural propertiesStructural properties
 Tetragonal polycrystalline partiallyTetragonal polycrystalline partially
stab...
 Occurs inOccurs in three crystallographicthree crystallographic forms.forms.
 MonoclinicMonoclinic at room temperature ...
MONOCLINIC
TERAGONALTETRAGONAL
CUBIC
>1170
>2370
<1070
coo www.indiandentalacademy.comwww.indiandentalacademy.com
 An associated volumetric expansion ( 3%-5% ) takesAn associated volumetric expansion ( 3%-5% ) takes
place. Non stabiliz...
Typical CharacteristicsTypical Characteristics ::
- High temperature bearing capability- High temperature bearing capabili...
High hardness and wear resistanceHigh hardness and wear resistance
Low thermal conductivity(2Wm/K)Low thermal conductivity...
Design and ManufactureDesign and Manufacture
www.indiandentalacademy.comwww.indiandentalacademy.com
Scanning the preparationScanning the preparation
www.indiandentalacademy.comwww.indiandentalacademy.com
Milling of Zr blocksMilling of Zr blocks
www.indiandentalacademy.comwww.indiandentalacademy.com
CAD / CAM SystemCAD / CAM System
www.indiandentalacademy.comwww.indiandentalacademy.com
FabricationFabrication
www.indiandentalacademy.comwww.indiandentalacademy.com
Material Selection Criteria :Material Selection Criteria :
(1) Esthetics(1) Esthetics
(2) Occlusal scheme(2) Occlusal sche...
(3) Quantity of remaining enamel(3) Quantity of remaining enamel
(4) Quantity or quality of remaining dentin(4) Quantity o...
Typical ApplicationsTypical Applications
- Space shuttles- Space shuttles
- Automobiles- Automobiles
- Cutting blades- Cut...
Advantages :Advantages :
(1) Superior esthetics(1) Superior esthetics
-dental zirconia ensures natural gloss and-dental zi...
(4) Optimal fit(4) Optimal fit
- eliminates conventional laboratory- eliminates conventional laboratory
proceduresprocedur...
Disadvantages :Disadvantages :
(1) Expensive(1) Expensive
-CAD/CAM supported cutting technique-CAD/CAM supported cutting t...
Indications :Indications :
 Anterior and posterior all ceramic crownsAnterior and posterior all ceramic crowns
and bridge...
Contraindications :Contraindications :
 Reduced inter-occlusal distanceReduced inter-occlusal distance
 Deep vertical ov...
Clinical Guidelines:Clinical Guidelines:
 Patient selectionPatient selection
 Detailed intraoral examinationDetailed int...
Preparation Guidelines :Preparation Guidelines :
 Local anesthesiaLocal anesthesia
 Depth guidesDepth guides
 Axial red...
www.indiandentalacademy.comwww.indiandentalacademy.com
www.indiandentalacademy.comwww.indiandentalacademy.com
 Double cord techniqueDouble cord technique
 Suitable hemostatic agentSuitable hemostatic agent
 Clean with water spray...
Impression makingImpression making
www.indiandentalacademy.comwww.indiandentalacademy.com
 Shade selectionShade selection
www.indiandentalacademy.comwww.indiandentalacademy.com
Cementation Guidelines :Cementation Guidelines :
- Internal surface of the restoration must- Internal surface of the resto...
 Rehabilitation………Rehabilitation………
bringing back to life!bringing back to life!
www.indiandentalacademy.comwww.indianden...
ConclusionConclusion::
Knowledge of the properties of theKnowledge of the properties of the
restorative material is a prer...
References:References:
Anusavice:Anusavice: Phillip’s Science of Dental Materials; Eleventh edition.Phillip’s Science of D...
www.indiandentalacademy.comwww.indiandentalacademy.com
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Zirconia all ceramic restorations/ dentistry course in india

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Zirconia all ceramic restorations/ dentistry course in india

  1. 1. ZIRCONIA BASED ALLZIRCONIA BASED ALL CERAMICCERAMIC RESTORATIONSRESTORATIONS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.comwww.indiandentalacademy.com
  2. 2. Spectacular smile,a ziphyr….that canSpectacular smile,a ziphyr….that can beat the oschen and acher in thebeat the oschen and acher in the western sky!!!western sky!!! www.indiandentalacademy.comwww.indiandentalacademy.com
  3. 3. ZirconiumZirconium  Derived from the Arabic word “Zargon”, whichDerived from the Arabic word “Zargon”, which means golden in colour.means golden in colour.  Discovered in 1789 by German chemist MartinDiscovered in 1789 by German chemist Martin Heinrich Klaproth.Heinrich Klaproth.  Late sixties evolved as a ceramic biomaterial forLate sixties evolved as a ceramic biomaterial for use in orthopedics.use in orthopedics.  In 1990s, it’s use began as endodontic posts andIn 1990s, it’s use began as endodontic posts and as implant abutments.as implant abutments. www.indiandentalacademy.comwww.indiandentalacademy.com
  4. 4. www.indiandentalacademy.comwww.indiandentalacademy.com
  5. 5. Structural propertiesStructural properties  Tetragonal polycrystalline partiallyTetragonal polycrystalline partially stabilized with Yttriumstabilized with Yttrium  Zirconium oxide – 94.9%Zirconium oxide – 94.9% Yttrium oxide - 5.1%Yttrium oxide - 5.1%  Critical grain size < 0.8 micronsCritical grain size < 0.8 microns www.indiandentalacademy.comwww.indiandentalacademy.com
  6. 6.  Occurs inOccurs in three crystallographicthree crystallographic forms.forms.  MonoclinicMonoclinic at room temperature and stable tillat room temperature and stable till 1170 degree celcius.1170 degree celcius.  Tetragonal phase- from 1170 degree celcius toTetragonal phase- from 1170 degree celcius to <2370 degree celcius.<2370 degree celcius.  Cubic phase at 2370 degree ceicius till it’sCubic phase at 2370 degree ceicius till it’s melting point of 2680 degree celcius.melting point of 2680 degree celcius.  During cooling, T-M transformation takes place.During cooling, T-M transformation takes place. www.indiandentalacademy.comwww.indiandentalacademy.com
  7. 7. MONOCLINIC TERAGONALTETRAGONAL CUBIC >1170 >2370 <1070 coo www.indiandentalacademy.comwww.indiandentalacademy.com
  8. 8.  An associated volumetric expansion ( 3%-5% ) takesAn associated volumetric expansion ( 3%-5% ) takes place. Non stabilized pure zirconium oxide would burstplace. Non stabilized pure zirconium oxide would burst due to the volume increase in the grains and tensiondue to the volume increase in the grains and tension within.within.  Addition of stabilizing oxides- Partially stabilized zirconiaAddition of stabilizing oxides- Partially stabilized zirconia (PSZ)(PSZ)  Improved mechanical and physical properties.Improved mechanical and physical properties.  When tensile stresses act on the crack tip in PSZ,When tensile stresses act on the crack tip in PSZ, transformation of T phase to M phase occurs.transformation of T phase to M phase occurs.  Local increase of 3-5% in volume- TransformationLocal increase of 3-5% in volume- Transformation tougheningtoughening www.indiandentalacademy.comwww.indiandentalacademy.com
  9. 9. Typical CharacteristicsTypical Characteristics :: - High temperature bearing capability- High temperature bearing capability - High density(>6g/cubic cm)- High density(>6g/cubic cm) - High strength and fracture toughness- High strength and fracture toughness Compressive strength 2000MPaCompressive strength 2000MPa Flexural strength 900-1200 MPaFlexural strength 900-1200 MPa www.indiandentalacademy.comwww.indiandentalacademy.com
  10. 10. High hardness and wear resistanceHigh hardness and wear resistance Low thermal conductivity(2Wm/K)Low thermal conductivity(2Wm/K) Good chemical corrosion resistanceGood chemical corrosion resistance www.indiandentalacademy.comwww.indiandentalacademy.com
  11. 11. Design and ManufactureDesign and Manufacture www.indiandentalacademy.comwww.indiandentalacademy.com
  12. 12. Scanning the preparationScanning the preparation www.indiandentalacademy.comwww.indiandentalacademy.com
  13. 13. Milling of Zr blocksMilling of Zr blocks www.indiandentalacademy.comwww.indiandentalacademy.com
  14. 14. CAD / CAM SystemCAD / CAM System www.indiandentalacademy.comwww.indiandentalacademy.com
  15. 15. FabricationFabrication www.indiandentalacademy.comwww.indiandentalacademy.com
  16. 16. Material Selection Criteria :Material Selection Criteria : (1) Esthetics(1) Esthetics (2) Occlusal scheme(2) Occlusal scheme Intra-articular TMJ signs or symptoms,Intra-articular TMJ signs or symptoms, occlusal muscle disorders,occlusal muscle disorders, masticatory muscle fatigue,masticatory muscle fatigue, tooth wear,tooth wear, tooth migration.tooth migration. www.indiandentalacademy.comwww.indiandentalacademy.com
  17. 17. (3) Quantity of remaining enamel(3) Quantity of remaining enamel (4) Quantity or quality of remaining dentin(4) Quantity or quality of remaining dentin (5) Conservation of tooth structure(5) Conservation of tooth structure www.indiandentalacademy.comwww.indiandentalacademy.com
  18. 18. Typical ApplicationsTypical Applications - Space shuttles- Space shuttles - Automobiles- Automobiles - Cutting blades- Cutting blades - Cumbustion engines- Cumbustion engines  Research has proven that the highResearch has proven that the high strength zirconia ceramic has thestrength zirconia ceramic has the potential to give prosthetic care inpotential to give prosthetic care in dentistry.dentistry. www.indiandentalacademy.comwww.indiandentalacademy.com
  19. 19. Advantages :Advantages : (1) Superior esthetics(1) Superior esthetics -dental zirconia ensures natural gloss and-dental zirconia ensures natural gloss and translucencytranslucency -dark and discolored margins eliminated-dark and discolored margins eliminated (2) High strength(2) High strength -fracture resistance-fracture resistance -crack resistance-crack resistance -flexural strength (~900MPa )-flexural strength (~900MPa ) (3) Biocompatible(3) Biocompatible - no allergic response till date.- no allergic response till date. www.indiandentalacademy.comwww.indiandentalacademy.com
  20. 20. (4) Optimal fit(4) Optimal fit - eliminates conventional laboratory- eliminates conventional laboratory proceduresprocedures - provides ample opportunity for- provides ample opportunity for aesthetic layering with the overlayaesthetic layering with the overlay porcelain.porcelain. (5) Easy preparation and cementation(5) Easy preparation and cementation - conservative tooth preparation- conservative tooth preparation - conventional / resin based cements- conventional / resin based cements (6) Excellent insulating behaviour.(6) Excellent insulating behaviour. www.indiandentalacademy.comwww.indiandentalacademy.com
  21. 21. Disadvantages :Disadvantages : (1) Expensive(1) Expensive -CAD/CAM supported cutting technique-CAD/CAM supported cutting technique (2) Difficult to re-intervene(2) Difficult to re-intervene -zirconia posts are difficult to remove from-zirconia posts are difficult to remove from root canalroot canal (3) Bond between veneer ceramic and zirconia(3) Bond between veneer ceramic and zirconia framework is the weakest component in theframework is the weakest component in the layered structure.layered structure. (4) Nonavailability of longitudinal study.(4) Nonavailability of longitudinal study. www.indiandentalacademy.comwww.indiandentalacademy.com
  22. 22. Indications :Indications :  Anterior and posterior all ceramic crownsAnterior and posterior all ceramic crowns and bridges requiring high strengthand bridges requiring high strength  Post and core (Endodontics)Post and core (Endodontics)  Implant abutmentsImplant abutments  Orthodontic bracketsOrthodontic brackets www.indiandentalacademy.comwww.indiandentalacademy.com
  23. 23. Contraindications :Contraindications :  Reduced inter-occlusal distanceReduced inter-occlusal distance  Deep vertical overlapDeep vertical overlap  Opposing supra-erupted teethOpposing supra-erupted teeth  Parafunctional habitsParafunctional habits  Very short clinical crownVery short clinical crown www.indiandentalacademy.comwww.indiandentalacademy.com
  24. 24. Clinical Guidelines:Clinical Guidelines:  Patient selectionPatient selection  Detailed intraoral examinationDetailed intraoral examination  Minimal clinical height of prospectiveMinimal clinical height of prospective abutment- 4mmabutment- 4mm  Total surface area of the connector – 7 toTotal surface area of the connector – 7 to 16 mm16 mm www.indiandentalacademy.comwww.indiandentalacademy.com
  25. 25. Preparation Guidelines :Preparation Guidelines :  Local anesthesiaLocal anesthesia  Depth guidesDepth guides  Axial reduction 1.2-1.5mmAxial reduction 1.2-1.5mm  Occlusal reductiuon 1.5-2.0mmOcclusal reductiuon 1.5-2.0mm  Axial taper 5-6 degreesAxial taper 5-6 degrees  Optimal preparation is a shoulder(0.8-1.0mm) orOptimal preparation is a shoulder(0.8-1.0mm) or chamfer which must be applied at an angle of 5chamfer which must be applied at an angle of 5 degrees.degrees.  The inside angle of the shoulder preparationThe inside angle of the shoulder preparation must be given a rounded contour.must be given a rounded contour.  Distinct gingival finish lineDistinct gingival finish line www.indiandentalacademy.comwww.indiandentalacademy.com
  26. 26. www.indiandentalacademy.comwww.indiandentalacademy.com
  27. 27. www.indiandentalacademy.comwww.indiandentalacademy.com
  28. 28.  Double cord techniqueDouble cord technique  Suitable hemostatic agentSuitable hemostatic agent  Clean with water sprayClean with water spray  Impression making- use addition siliconeImpression making- use addition silicone  Double mix techniqueDouble mix technique www.indiandentalacademy.comwww.indiandentalacademy.com
  29. 29. Impression makingImpression making www.indiandentalacademy.comwww.indiandentalacademy.com
  30. 30.  Shade selectionShade selection www.indiandentalacademy.comwww.indiandentalacademy.com
  31. 31. Cementation Guidelines :Cementation Guidelines : - Internal surface of the restoration must- Internal surface of the restoration must be roughbe rough - Clean tooth surface of all residual- Clean tooth surface of all residual temporary cement.temporary cement. - Conventional or resin based cements can- Conventional or resin based cements can be used.be used. www.indiandentalacademy.comwww.indiandentalacademy.com
  32. 32.  Rehabilitation………Rehabilitation……… bringing back to life!bringing back to life! www.indiandentalacademy.comwww.indiandentalacademy.com
  33. 33. ConclusionConclusion:: Knowledge of the properties of theKnowledge of the properties of the restorative material is a prerequisite torestorative material is a prerequisite to provide high standard restorations that willprovide high standard restorations that will ultimately be appreciated by the patients.ultimately be appreciated by the patients. A combination of superior physicalA combination of superior physical properties, biocompatibility and excellentproperties, biocompatibility and excellent esthetics make TZP popular among theesthetics make TZP popular among the contemporary all ceramic materials.contemporary all ceramic materials. www.indiandentalacademy.comwww.indiandentalacademy.com
  34. 34. References:References: Anusavice:Anusavice: Phillip’s Science of Dental Materials; Eleventh edition.Phillip’s Science of Dental Materials; Eleventh edition. Shillingburg: Fundamentals of Fixed Prosthoidontics; Third editionShillingburg: Fundamentals of Fixed Prosthoidontics; Third edition Fracture resistance and reliability of new zirconia posts:Fracture resistance and reliability of new zirconia posts: J of ProsthetJ of Prosthet DentDent 2004;91;342-2004;91;342- 348348 In -vitro fracture resistance of posterior metal crown and all ceramic inlay retained resinIn -vitro fracture resistance of posterior metal crown and all ceramic inlay retained resin bonded fixed partial denture:bonded fixed partial denture: J of ProsthetJ of Prosthet DentDent2004;92;365-3702004;92;365-370 Esthetic enhancement of ceramic crown with zirconia dowels and cores:Esthetic enhancement of ceramic crown with zirconia dowels and cores: J of ProsthetJ of Prosthet DentDent 2004;92;116-1192004;92;116-119 Selective infiltration etching technique for a strong and durable bond of resin cements toSelective infiltration etching technique for a strong and durable bond of resin cements to zirconia based materials:zirconia based materials: J of Prosthet DentJ of Prosthet Dent 2007:98;379-3882007:98;379-388 A new oxide based high strength all ceramic material:A new oxide based high strength all ceramic material: The Journal OfThe Journal Of IndianIndian Prosthodontic SocietyProsthodontic Society; Oct 2007;Vol 7; Issue 4;175-78; Oct 2007;Vol 7; Issue 4;175-78 www.indiandentalacademy.comwww.indiandentalacademy.com
  35. 35. www.indiandentalacademy.comwww.indiandentalacademy.com

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