Dental Laboratory Technician Trainee Practice Test

Which outcome is associated with a well-defined crown finish line?

Proper marginal fit and cement seal Increased patient discomfort Weaker margins Unreliable cement seal

Correct Answer:

Proper marginal fit and cement seal

Explanation:

A crown finish line that is well defined creates a precise boundary for seating, which leads to a proper marginal fit and a solid cement seal. When the margin is crisp and continuous, the crown can sit flush against the tooth, allowing uniform cement thickness all around and minimizing gaps at the margin. This tight seal helps prevent microleakage, plaque accumulation, and cement washout, contributing to long-term durability and periodontal health. In contrast, issues like patient discomfort, weaker margins, or an unreliable cement seal are typically associated with poorly defined or misfit margins, not with a well-defined finish line.

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