Section 1 Planning And Preparation Surface Detail For Planning Purpos

Section Planning And Preparation Surface Detail For Planning Purposes However The Material Does Not Reproduce Sufficient Surface Detail For Suitable

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Section 1 Planning And Preparation Surface Detail For Planning Purposes However The Material Does Not Reproduce Sufficient Surface Detail For Suitable Working Casts And Dies On Which Actual Fixed Prostheses Are Fabricated See Chapter 17 I RREVERSIBLE HYDROCOLLOID The Irreversible Hydrocolloids Or Alginates Are Es Sentially Sodium Or Potassium Salts Of Alginic Acid And Are Therefore Water Soluble They React Chemi Cally With Calcium Sulfate To Produce Insoluble Cal Cium Alginate These Materials Contain Other Ingre Dients Chiefly Diatomaceous Earth For Strength And Body Trisodium Phosphate Na 3 PO 4 And Similar Compounds To Control The Setting Rate As They React Preferentially With Calcium Sulfate When This Reac Tion Is Complete And The Retarder Is Consumed Gel Formation Begins The Clinician Can Control The Reac Tion Rate By Varying The Temperature Of The Mixing Water Because Set Irreversible Hydrocolloid Is Largely Water It Will Readily Absorb By Imbibition As

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