Zinc Phosphate

By Dr. Vishaal Bhat on Wednesday 2 July 2008 with 0 comments



Composition:

-powder: 90% ZnO, 10% MnO

-liquid: 67% orthophosphoric acid, 33% water

-compressive strength: 80-110 Mpa

-tensile strength: 5-7 Mpa




3 advantages of ZnPO4:

  1. successful clinical record

  2. low film thickness

  3. easy to remove excess

4 disadvantages of ZnPO4:

  1. pulpal sensitivity (pH=3.0)

  2. soluble in oral fluids (washout)

  3. no chemical bond to tooth or restoration

  4. it’s exothermic

Category: Dental Materials Notes

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