Match the Items with the Correct Description Below

question 7

Multiple Choice

Match the items with the correct description below.
-Colloid

• A)An alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature
• B)Gluelike material composed of two or more substances in which one substance does not go into solution but is suspended within another substance
• C)An agar impression material that can be heated to change from a gel into a fluid state that can flow around the teeth
• D)A water-based colloid used as an elastic impression material
• E)A versatile irreversible hydrocolloid that is the most used impression material in the dental office

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Definitions:

Cohort Study

A research approach involving a group of people observed over a period to determine how certain exposures affect outcomes.

Experimental

Pertaining to a scientific approach involving controlled trials and studies to test hypotheses, investigate cause-and-effect relationships, or demonstrate specific effects.

Observational

Pertaining to research methods that involve watching and recording behaviors or outcomes in their natural setting without manipulation.

Nested Case-Control

A study design used within a cohort study, where a subset of participants with a specific outcome is compared to a subset without the outcome from the same cohort.