This ppt contains detailed presentation of dental Materials topic, Zinc Oxide Eugenol cements. It will help students to understand different concepts through images. This presentation is Made by Toor E Cina Jadoon, a Student of Sardar Begum Dental college. keep sharing , keep caring. Allah Help those who help others. Jazak allahu khhyr . Thanks..

1. Zinc Oxide Eugenol
Cement
Toor-e-Cina Jadoon
1480
2nd Year BDS
SBDC, Peshawar

2. Learning Objectives
Zinc Oxide Eugenol Cement in detail
Presentation, Availability
Composition, Types, Uses
Manipulation
Setting Reaction
Properties

3. Introduction
 Since 1890s , Zinc Oxide based cements are in use
extensively
 Oil based cements
 Most biocompatible among
cements
 Have sedative effect on pulp
 Especially used for Temporary
cementation

5.  Availability
• Two Bottle System
• Two Paste System
Presentation
• Powder-Liquid
• Paste-Paste

6. Types
1. Simple/conventional zinc oxide eugenol
2. Reinforced/modified zinc oxide eugenol
a. EBA reinforced cements
b. Resin reinforced cements

7. Composition
Powder
i. Zinc oxide (69%)
-Primary reactive ingredient
ii. Rosin (29%)
-Reduces brittleness
iii. Zinc Acetate (1-5%)
Acts as an accelerator

8.  Liquid
i. Eugenol 85%
- Primary reactive ingredient
ii. Olive oil (5-15%)
- Controls viscosity

9. Setting Reaction
Zinc Oxide + Water Zinc Hydroxide
Zinc Hydroxide + Eugenol ZincEugenolate+Water
 Water is essential for the reaction
 Reaction is slightly exothermic
 An Amorphous chelate of Zinc Eugenolate (end
product) is formed

10.  Chelate formed is an amorphous gel
 tends to crystallize
 imparting strength to the set mass
 set cement consists of particles of zinc oxide
 embedded in a matrix of zinc eugenolate

11. Reaction is reversible
• Because the zinc eugenolate is easily hydrolyzed
• Cement disintegrates rapidly
• when exposed to oral conditions
• Heat and water accelerates reaction

12. Properties
• Manipulative properties
• Mechanical properties
• Biological properties
• Solubility
• Thermal properties
• Adhesion

13. Manipulative properties
• Ideal setting characteristic
• Offer adequate working time
• Very little increase in viscosity occurs
• After placing into the cavity
 Sets quickly in oral cavity due to
1. Higher temperature
2. Humidity comparatively

14. • Setting time: 4-10 minutes
• Complete setting between zinc oxide and eugenol takes
about 12 hours

15. Mechanical properties
• Compressive strength is 20 MPa for un-reinforced
cement
• 40 MPa for reinforced zinc oxide cements
• Ultimate strength is lower than Zinc phosphaste cement
• Tensile strength ranges from 0.32 to 5.3MPa

16. Biological properties
• PH during placement is 7
• Use in deep cavities (liner)
• without harming the dental pulp
• Unconsumed eugenol is irritant
• under certain conditions
• Able to leach out from the set material

17. • Eugenol has sedative effect on pulp
• Helps to minimize
• the effects of bacterial ingress

18. Solubility
• Leaching of eugenol is responsible for its relatively high
solubility
• Leached eugenol replaced by water can cause
hydrolysis of the Zinc eugenolate
• Then disintegration of the cement structure occurs
• Therefore not suitable as permanent luting agent

20. Thermal properties
• Excellent thermal insulating properties
• Can form effective barrier
• under metallic restoration
• Thermal diffusivity is similar to that of dentine

21. Adhesion
• Don’t adhere well to the enamel and dentine
• Therefore they are not often
• used for final cementation of crowns and bridges

22. Manipulation
Armamentarium
 Powder/Liquid or paste /paste
 Mixing pad
 Condenser
 Spatula

23. Procedure
• Shake the bottle for even distribution
• Powder-liquid ratio 3:1 or 4:1
• Place 3 scoops of powder on mixing pad/glass
slab
• Place four drops of eugenol next to powder
• Incorporate half of the powder into the liquid
• Fold it in using stiff side of spatula

24. • Apply heavy force to ensure even mix
• Add the remaining powder
• Final mixture should be putty like
• Should be tacky
• Roll the mixed cement into a long roll
• Cut it into small pieces
• Using spatula

27. Applications
• Temporary luting of restorations
• Temporary filling of teeth
• Cavity liner or base
• Root canal sealer

29. Root canal sealer

30. Luting of Restoration

31. Ethoxy-benzoic acid
(EBA) reinforced cements
 Availability
-Two bottle system
 Presentation
-Powder / Liquid

32. Composition
 Powder
i. Zinc Oxide 60%
ii. Quartz 35%
iii. Hydrogenated rosin 5%
 Liquid
i. Ethoxy-benzoic acid
62.5%
ii. Eugenol 37.5%
-Primary Reactive Ingredient
-Reinforcing Agent
-Reinforcing Agent
-Reactive ingredient
-Reactive ingredient

33. Properties
• Setting characteristics similar to zinc oxide
eugenol cement
• Set material is stronger
• Compressive strength of upto 85MPa
• Comparatively lower solubility

34. Application
• Cavity liner
• Luting agent
• Can be use as permanent cementation

35. Polymer reinforced zinc
oxide eugenol cement
 Availability
-Two bottle system
 Presentation
-Powder / liquid

36. Composition
 Powder
i. Zinc oxide 80%
ii. Acrylic resin 20%
 Liquid
i. Eugenol

37. Reference
Text from
Dental material book by Dr Tahir Ali khan
www.slideshare.net
Images from;
pocketdentistry
Dental dost

38. Thank You