Which is best material for RPD impression_______________?

Correct answer: B. Irreversible hydrocolloid

  • A. Impression plaster
  • B. Irreversible hydrocolloid
  • C. Reversible hydroollioid
  • D. None of the above

Explanation

Irreversible hydrocolloid, or alginate, is commonly used for preliminary impressions of partially edentulous arches and removable partial dentures. Impression plaster is rigid, while reversible hydrocolloid needs special equipment.

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