Category: Procedure | Difficulty: Intermediate | Priority: Core | Subcategory: Restorative Concept
The prepared boundary at the gingival extent of a tooth preparation that defines the edge of an indirect restoration; types include chamfer, shoulder, feather edge, and knife-edge.
The shaped edge at the base of a crown preparation that determines where the crown ends.
[[margin; chamfer; shoulder preparation; crown]]
Finish line design affects restoration strength, esthetics, and marginal fit; shoulder prep is most common for full-coverage crowns.
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