Which of the Following Is True of Impression Trays

question 14

Multiple Choice

Which of the following is true of impression trays?

• A) Stock trays are made of plastic rather than metal and can be solid or perforated.
• B) Plastic trays are inexpensive and are disposable, whereas metal trays are more expensive and must be cleaned and sterilized between uses.
• C) Custom trays are constructed in the patient's mouth with chemically cured, light-cured, or thermoplastic resins on casts of the teeth.
• D) The triple tray is a custom full-arch tray used for bite registration.

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