The clinical performance of crowns and implants hinges upon the quality of the interface between the restoration and 
the tissue. In instances where bonding is absent, such as with crowns cemented using inferior materials or with 
amalgam restorations, this interface poses both biological and biomechanical risks. Conversely, contemporary 
dentistry emphasizes the establishment of a stable interface through bonding. Over the mid-20th century, dentistry has seen continual advancements in materials and techniques tailored to diverse clinical scenarios. A key requisite for clinical longevity lies in optimizing bonding to ensure a robust and enduring interface.
This presentation will focus on clinical protocols tailored to various scenarios, aimed at achieving a durable interface between high glass ceramics, zirconia, metals, and tissues. Through these strategies, we aim to attain optimal 
functionality and longevity in dental restorations.