essay 18 - bases - classifications. types. purpose. properties. instruments. technique

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Last updated 8:37 AM on 5/21/26
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5 Terms

1
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what are the classification of bases?

  1. protective bases - when remaining dentin is very thin

  2. thermal insulating bases - placed under metallic restorations

  3. blocking-out bases - to build up floor walls for indirect restorations

2
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what are some examples of bases?

  • zin oxide-eugenol

  • zinc phosphate cement

  • polycarboxylate cement

  • glass ionomer cement (conventional or RMGI)

3
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purpose of bases

  • provide thermal protection

  • reduce stress between restoration and pulp

  • replace lost dentin for proper restoration support

  • may offer antibacterial effects of fluoride release

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properties of bases

  • must be strong enough to resist forces during restoration

  • biocompatible

  • should not interfere with restorative material setting

  • easy to place and shape

  • should be non toxic to pulp

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instruments and technique of bases

  • mixed on a mixing pad or glass slab

  • carried with base placement instrument

  • smoothed and adapted to cavity floor

  • in deeper areas, placed in layers if necessary