Abstract
The connection between the tooth and the restoration is the weakest link in any of the restoration. The success and longevity of a restoration greatly depend on the design and preparation of the marginal peripheries, which are the edges where the restoration meets the natural tooth structure.When the margins of the restoration closely adapt to the cavosurface finish line of the tooth preparation, it creates a favorable relationship between the restoration and the tooth structure. This close adaptation helps to improve the survival of the restoration in the oral environment.A well-fitting margin provides several benefits. It helps prevent microleakage, Microleakage can lead to recurrent decay, sensitivity, and even failure of the restoration. By closely adapting the margins, the risk of microleakage is minimized.A precise margin adaptation helps in creating a strong bond between the restoration material and the tooth structure. This bond enhances the structural integrity of the restoration and provides better retention, preventing its dislodgement or fracture.
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