Quality Control & Industry Standards Flashcards
7 cards from real CDC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Control & Industry Standards flashcards as text
Which ISO standard specifically governs ceramic materials used in dentistry?
Answer: ISO 6872
ISO 6872 specifies requirements and test methods for ceramic materials used in restorative and prosthetic dentistry.
During incoming inspection of dental porcelain, which defect would most critically warrant rejection of a batch?
Answer: Crystalline inclusions visible under magnification
Crystalline inclusions in dental porcelain indicate contamination or improper manufacturing and can compromise restoration strength and esthetics.
What does the term 'process validation' mean in a dental laboratory quality system?
Answer: Documenting that a process consistently produces results meeting specifications
Process validation establishes documented evidence that a dental laboratory process will consistently produce a product meeting its predetermined specifications.
Under FDA regulations, a dental laboratory that fabricates custom ceramic restorations is classified as a:
Answer: Device establishment subject to registration requirements
Dental laboratories that fabricate custom devices are typically required to register as device establishments with the FDA.
A shade guide used for quality control verification should be replaced when:
Answer: Tabs show visible wear, fading, or damage affecting color accuracy
Worn or faded shade tabs produce inaccurate color comparisons, making replacement necessary when physical condition compromises reliability.
In a dental laboratory's corrective action process, the 'root cause analysis' step is critical because:
Answer: Identifying the true cause prevents recurrence of the nonconformance
Root cause analysis identifies why a defect occurred so that effective corrective actions can eliminate the cause and prevent future occurrences.
Which measurement tool is most appropriate for verifying the marginal fit tolerance of a ceramic crown in a quality control check?
Answer: Optical comparator or digital microscope
An optical comparator or digital microscope provides magnified, measurable assessment of marginal gap dimensions with the accuracy needed for crown fit verification.