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Ferrule effect: Need for Ferrule, Advantages, Design & Classification of Ferrule

About Ferrule effect: Need for Ferrule, Advantages, Design & Classification of Ferrule

13m 29s

Fixed Prosthodontics · Self-Learning

Reviewed: 03/27/2021 · Valid until 03/27/2024

A Ferrule is a 360 degree collar of the crown surrounding the parallel walls of the dentin extending coronal to the shoulder of the preparation. When properly placed, it reduces the incidence of fracture in endodontically treated teeth. Ferrule combines a shoulder preparation with parallel coronal dentin walls and improves overall resistance of restoration. Ferrule design incorporates nearly parallel walls, a minimum height of 2mm, width of at least 1mm and preferably placed circumferential. Another important aspect to be considered while placing a ferrule is the biologic width. In severely damaged tooth with no clinical crown available, surgical crown lengthening or orthodontic extrusion can be considered.

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